38 results on '"Tilbury, Colin R"'
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2. Out of southern Africa: Origins and cryptic speciation in Chamaeleo, the most widespread chameleon genus
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Main, Devon C., van Vuuren, Bettine Jansen, Tilbury, Colin R., and Tolley, Krystal A.
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- 2022
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3. Approaches to Snake Envenomation in Southern Africa
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Pattinson, James, primary, Oosthuizen, George, additional, Tilbury, Colin R., additional, and Wood, Darryl, additional
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- 2021
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4. A Cryptic New Species of Polemon (Squamata: Lamprophiidae, Aparallactinae) from the Miombo Woodlands of Central and East Africa
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Portillo, Frank, Branch, William R., Tilbury, Colin R., Nagy, Zoltán T., Hughes, Daniel F., Kusamba, Chifundera, Muninga, Wandege M., Aristote, Mwenebatu M., Behangana, Mathias, and Greenbaum, Eli
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- 2019
5. A re-evaluation of the generic assignment of Bradypodion spinosum (Matschie, 1892) and some considerations on the genus Rhampholeon Günther, 1874
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Tilbury, Colin R, Mariaux, Jean, and BioStor
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- 2004
6. A fatal bite from the burrowing asp Atractaspis corpulenta (Hallowell 1854)
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Tilbury, Colin R. and Verster, Janette
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- 2016
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7. Convergence and vicariance: speciation of chameleons in the Cape Fold Mountains, South Africa, and the description of three new species of Bradypodion Fitzinger, 1843
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Tolley, Krystal A, primary, Tilbury, Colin R, additional, and Burger, Marius, additional
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- 2022
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8. Ancient forest fragmentation or recent radiation? Testing refugial speciation models in chameleons within an African biodiversity hotspot
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Tolley, Krystal A., Tilbury, Colin R., Measey, G. John, Menegon, Michele, Branch, William R., and Matthee, Conrad A.
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- 2011
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9. Clinging to survival: Critically Endangered Chapman's pygmy chameleon Rhampholeon chapmanorum persists in shrinking forest patches
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Tolley, Krystal A., primary, Tilbury, Colin R., additional, da Silva, Jessica M., additional, Brown, Gary, additional, Chapeta, Yankho, additional, and Anderson, Christopher V., additional
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- 2021
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10. Envenomation by the spotted harlequin snake, Homoroselaps lacteus (Linnaeus) 1754 (Serpentes: Atractaspidinae)
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Tilbury, Colin R., primary, Peacock, Faansie, additional, and Harvey, James, additional
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- 2021
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11. Clinging to survival: Critically Endangered Chapman's pygmy chameleon Rhampholeon chapmanorum persists in shrinking forest patches.
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Tolley, Krystal A., Tilbury, Colin R., da Silva, Jessica M., Brown, Gary, Chapeta, Yankho, and Anderson, Christopher V.
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CHAMELEONS , *GENE flow , *REMOTE-sensing images , *GENETIC variation , *DEFORESTATION - Abstract
The Critically Endangered Chapman's pygmy chameleon Rhampholeon chapmanorum is endemic to the low elevation rainforest of the Malawi Hills in southern Malawi. Much of this forest has been converted to agriculture and it was uncertain whether chameleon populations have persisted. We used current and historical satellite imagery to identify remaining forest patches and assess deforestation. We then surveyed forest patches for the presence of this chameleon, and assessed its genetic diversity and structure. We estimated that 80% of the forest has been destroyed since 1984, although we found extant populations of the chameleon in each of the patches surveyed. Differentiation of genetic structure was strong between populations, suggesting that gene flow has been impaired. Genetic diversity was not low, but this could be the result of a temporal lag as well as lack of sensitivity in the mitochondrial marker used. Overall, the impact of forest loss is assumed to have led to a large demographic decline, with forest fragmentation preventing gene flow. [ABSTRACT FROM AUTHOR]
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- 2022
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12. Convergence and vicariance: speciation of chameleons in the Cape Fold Mountains, South Africa, and the description of three new species of BradypodionFitzinger, 1843
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Tolley, Krystal A, Tilbury, Colin R, and Burger, Marius
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ABSTRACTThe mechanisms that underpin ecological speciation, morphological convergence and the evolution of ecological morphotypes (ecomorphs) in squamates have allowed for a better appreciation of the speciation process in chameleons. In particular, attention has been drawn to several populations of chameleons (Sauria, Chamaeleonidae, Bradypodion) from the Cape Fold Mountains, South Africa. Previous work suggested that these populations are genetically divergent, but with strong similarities in phenotype. Using an integrative taxonomic approach that accounts for genetic diversity, habitat and morphology, three of these populations are described as species. One population is from an isolated forest patch and is genetically different at the species level, but morphologically similar to Bradypodion damaranum(Boulenger, 1887) from forested areas in the Knysna region. Although not sister species, the two are in the same clade and probably diverged through vicariance of the forest. Two other populations are from fynbos habitat in adjacent mountain ranges (Tsitsikamma/Langkloof/Kouga mountains and Baviaanskloof Mountains) and are also morphologically similar, but genetically divergent at the species level. These two species are not sister taxa and are not in the same clade yet have a virtually identical phenotype presumably as the result of convergent evolution for the fynbos habitat. Within the context of morphological taxonomy, these populations have been difficult to evaluate. However, when viewed in the context of ecological speciation, convergence and morphological conservatism, the species boundaries are apparent, allowing for them to be described as new taxa.
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- 2022
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13. Cryptic diversity in Rhampholeon boulengeri (Sauria: Chamaeleonidae), a pygmy chameleon from the Albertine Rift biodiversity hotspot
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Hughes, Daniel F., primary, Tolley, Krystal A., additional, Behangana, Mathias, additional, Lukwago, Wilber, additional, Menegon, Michele, additional, Dehling, J. Maximilian, additional, Stipala, Jan, additional, Tilbury, Colin R., additional, Khan, Arshad M., additional, Kusamba, Chifundera, additional, and Greenbaum, Eli, additional
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- 2018
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14. Kinyongia mulyai Tilbury & Tolley, 2015, sp. nov
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Tilbury, Colin R. and Tolley, Krystal A.
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Reptilia ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Kinyongia ,Kinyongia mulyai ,Taxonomy - Abstract
Kinyongia mulyai sp. nov. Synonomy: Kinyongia adolfifriderici Tilbury 2010 Holotype. PEM-R 19199 (CT 426 — Fig. 11), a sub-adult male with partially everted hemipenes, collected by Colin Tilbury and Isak Hattingh on 21 st March 2010, from path side vegetation at 1700 metre a.s.l., Mount Nzawa, Moba District, Katanga Province, Democratic Republic of the Congo (6 ° 51.07 ’ S; 29 ° 35.87 ’ E). Diagnosis. Within the genera Kinyongia and Trioceros, the ontogenetic development of body crests and rostral process’s—whilst not developed to the same degree as seen in adults—is still evident in sub-adult specimens, and can be reliably used to determine the presence or absence of these characters. Although Kinyongia mulyai sp. nov. is known from only one sub-adult specimen, it is likely that the morphological characters are sufficiently well developed to provide reliable criteria on which to base a morphological determination. Kinyongia mulyai sp. nov. is distinguishable from the closely-related species K. adolfifriderici, K. gyrolepis (Greenbaum et al. 2012) and K. excubitor (Barbour 1911) by the absence of a dorsal crest in the male. It is also distinguished from K. adolfifriderici by having a narrower and more elongate head (Fig. 10), with a head length/inter-orbital width ratio of 4 (versus 3 for K. adolfifriderici), and from both K. gyrolepis and K. adolfifriderici by having a higher number of upper labial scales (17 vs. a maximum of 15 and 14 respectively; Greenbaum et al. 2012). Distinguished from all the other Kinyongia congeners by the absence of any form of naso-rostral ornamentation in males. Description of the Holotype. A small chameleon with a snout-vent length of 44mm and tail measuring 63mm. Head length from casque tip to snout 13.7mm and the inter-orbital width at mid orbit 2.8mm. Casque low, barely elevated above the nape. Parietal crest consists of a row of 3 enlarged tubercles at the apex of the casque. This forks anteriorly into two short rows each consisting of 2 low tubercles. Supra-orbital ridges more or less smooth. The supra-orbital ridges are separated from each other across the mid-orbital point by three flattened tubercles. The canthal ridge is adorned with a row of 4 prominent rounded tubercles—the most anterior the largest. A temporal crest composed of 4 similarly sized enlarged tubercles arises from the mid posterior orbital rim; this crest ascends along the posterior rim of the casque to its apex. The top of the casque and the zone below the temporal crest are covered with similar-sized, flattened tubercles. The nares open infero-posteriorly about midway between the anterior orbital rim and the snout. A single row of tubercles separates the inferior orbital rim and the upper labials. There is no rostral process. Seventeen upper labials and 17 lower labials are present from the tip of the snout to the posterior margin of the orbital rim. Two tubercles separate the upper labials from the end of the canthal ridge. There is no trace of a gular crest, or ventral crest. The sides of the body are clad with somewhat heterogeneous, flattened polygonal tubercles, with larger tubercles showing a tendency to rosette formation on the lower flanks. A network of thin interstitial grooves extends between the tubercles. There is no row of enlarged flank tubercles. The dorsal vertebral crest is represented by a single small cone at the nape behind the casque, followed by a second much smaller cone. Thereafter the dorsal keel is smooth. The tail is likewise smooth. The outer surfaces of the limbs are covered in enlarged flattened tubercles while the inner surfaces of the limbs are clad with small regular tubercles. Colour in Life. Head—Top of head olive green with lighter green tubercles on casque. Skin of eyeballs light brown with two thin horizontal stripes running through the middle and extending posteriorly along the temporal crest and anteriorly just below the canthal ridge. The zone below the temporal crest is powder blue scattered with greenish tubercles. A small triangular area between the mouth line, nares and the orbital rim is blue green. The gular region is suffused with pale orange and yellow extending posteriorly to between the front limbs. A pale line extends from below the eye to just beyond the commissure of the mouth. Background colouration of body is olive green. Interstitial skin between the tubercle rosettes on lower flanks forms a network of dark interstitium. The dark interstitium of the flanks is broken by two broad zones of pale interstitium extending from the dorsal ridge down over the flanks to the middle of the body. There is no white line on the abdomen. Outer side of limbs with light green tubercles, skin on inner sides of limbs off white. Tail olive green with many thin dark bands. Habitat. The Holotype was collected in closed canopy Afrotemperate montane forest at 1800 metres a.s.l. from path side vegetation, perched at approximately 2.5 metres from the ground. One other chameleon (not collected) was observed occupying a sleeping perch on an exposed liana vine over 20 metres above the ground. Etymology. Named for Mr. Jules Mulya, whose energetic support and assistance with smoothing away mountains of obstacles to the progress of the Mt. Nzawa expedition led to the discovery of both new species.
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- 2015
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15. Rhampholeon (Rhinodigitum) hattinghi Tilbury & Tolley, 2015, sp. nov
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Tilbury, Colin R. and Tolley, Krystal A.
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Reptilia ,Squamata ,Animalia ,Rhampholeon ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy ,Rhampholeon hattinghi - Abstract
Rhampholeon (Rhinodigitum) hattinghi sp. nov. Synonymy: Rhampholeon boulengeri Tilbury 2010. Holotype. PEM-R 19194, an adult male with everted hemipenes, collected by Colin Tilbury and Isak Hattingh on 21 st March 2010, from path side vegetation at 1700 metres a.s.l., Mount Nzawa, Moba District, Katanga Province, Democratic Republic of the Congo (6 �� 51.07 ��� S; 29 �� 35.87 ��� E). Paratypes. PEM-R 19193, adult male; PEM-R 19195, adult male, PEM-R 19196, adult female; PEM-R 19197, adult female; PEM-R 19198, adult female; all collected on the same date and locality as the holotype. Diagnosis. Due to its markedly bicuspid claws, amelanotic parietal peritoneum and acalyculate bag-like hemipenes with dual apical horns, this taxon can be placed within the sub-genus Rhampholeon (Rhinodigitum) Matthee et al. 2004. In spite of the remarkably conserved external morphology within this genus, this new taxon is easily distinguishable from congeners by virtue of the following identifying characteristics: The consistent absence of deep mite pockets (or pits) in the inguinal flexure distinguishes this taxon from Rh. beraduccii Mariaux & Tilbury and the six species of the Rh. platyceps G��nther complex (Branch et al. 2014), including Rh. platyceps, Rh. chapmanorum Tilbury, Rh. maspictus Branch et al., Rh. tilburyi Branch et al., Rh. bruessoworum Branch et al. and Rh. nebulauctor Branch et al.; the presence of deep pits in the axillae of this taxon distinguishes it from Rh. nchisiensis Loveridge and Rh. acuminatus Mariaux & Tilbury; the relatively smooth supra-orbital and canthal crests distinguish this taxon from Rh. boulengeri, Rh. uluguruensis Tilbury & Emmrich and Rh. moyeri Menegon et al., in all of which a peaked cluster of tubercles forms distinct protuberances above the eye and the nasal aperture (Fig. 5). Description of Holotype. Snout-vent 56mm, tail 11mm. Body habitus leaf like - typical of all other Rhampholeon (Rhinodigitum) species. Head short, casque flattened, top of head shallowly concave. The lateral crests are studded with several prominent tubercles. Parietal crest indistinct, indicated by a short row of 3 marginally enlarged tubercles. The supra-optic ridge gathers into a low cluster of tubercles anteriorly above each eye, but without forming a supra-optic horn. The two supra-orbital ridges are connected to each other by a series of 18 inter-orbital tubercles arranged in a shallow V across the top of the head. The canthal ridges are formed by a row of enlarged, relatively smooth tubercles which terminate anteriorly at the base of a small, finely tuberculated stump-like process that barely projects off the anterior end of the snout. The nares open posteriorly, from a small bulge at a point roughly one third of the distance between the anterior orbital rim and the front of the maxilla. A distinct temporal crest arises from the mid post-orbital rim and consists of 5 tubercles on the right and six tubercles on the left, of which the most posterior is the largest. Three large sub-conical tubercles are spaced along the inferoposterior rim of the orbit. A prominent tubercle is situated just above the mouth in line with the posterior orbital rim. The dorsal vertebral line is weakly crenulated, fading to smooth over the pelvic region. The dorsal margin of the tail is likewise smooth. Deep axillary mite pockets (or pits) are present, whilst the inguinal flexures are smooth. The background scalation of the body, tail, limbs and belly is composed of tightly packed sub-homogeneous, stellate-edged tubercles. The gular region of the throat extending to between the front limbs is studded with many small conical tubercles. These also are found on the belly, underside of the tail and the underside and particularly on the outer-surface of the limbs. The sides of the body have regularly-spaced, enlarged conical tubercles, with three particularly enlarged cones situated in a row at midbody, the first sited above the shoulder, the second at midbody, and the last just before the pelvis. Claws are markedly biscuspid, several prominent palmar and plantar accessory spines are seen at the base of the toes, and the outer soles of the feet are relatively spinose whilst the inner soles are smooth with a cobblestone appearance. Colour in life. Adult male (Figs 6 & 7). Top of head and snout dark brown extending to cover the sides of the snout above the line of the mouth and to a lesser extent the eyeball and superior temporal zone. Eyeball with dark radiations especially prominent over the upper half of the eyeball. Gular region off-white. Body light brown mottled with olive green. Five dark blotches are spaced along the dorsal vertebral ridge, and a broad dark blotch is also located over the dorsum of the tail. Two thin dark green stripes, originating from the second and third vertebral blotches, extend infero-posteriorly over the flanks. Three dark spots are arrayed along the flank, each spot centred over a prominent conical tubercle. The inner sides of the fore and hind limbs pale orange. A prominent white spot is located on each side of the tail. Adult female stress pattern (Fig. 8). Dorsal ridge orange from the tip of the casque to the tip of the tail. Flanks speckled with small orange spots and three large white spots on the flanks, each surround an enlarged conical tubercle. Sides of head and gular region flecked in white, sometimes forming short vertical stripes. Eyeball dark and speckled with light blue tubercles. Lateral flank stripes dark but heavily flecked with light blue. Hemipenes. Short bag-like, truncus acalyculate; a pair of short, broad-based apical horns incurving above the sulcus spermaticus (Fig. 9). The upper surface of the horns is covered in closely packed thorn-like papillae, much like a pineapple skin. Fourteen papillae are arranged in a proximal or basal cluster terminating in a distal row of two papillae. Inferior to each apical horn, a prominent balloon-like membranous evagination billows anteriorly. Sexual Dimorphism. Apart from the prominent hemipenal bulges there is little sexual dimorphism evident in the type series (Table 4). In males the tail comprises between 16���23 % of the total length whilst in females it is between 14���18 % of total length. Number Sex Length Rp Casque/snout Sub-orbital Axil pit Inguinal pit (mm) (mm) rows *= Holotype, measurements in millimetres; s-v = snout-vent length; Io tub = inter-orbital tubercles; Io diam = interorbital diameter; Length Rp = length of rostral process; Sub-orbital rows = number of rows of tubercles between the inferior orbital rim and the upper labials; na = not measured. Variation. In the paratypes the parietal crest was either absent, or merely indicated as in the holotype. The supra-orbital crest is relatively smooth in all specimens, only forming a low cluster of tubercles in 2 specimens at the point where the inter-orbital tubercles terminate above the eye. The soles of the feet may vary from relatively smooth to a sub-acuminate field of tubercles. The hemipenes of PEM-R 19193 and PEM-R 19195 do not differ in any substantial way from that of the holotype. Reproduction. The parietal peritoneum in the abdominal cavity of the largest female (PEM-R 19198) was unpigmented and the fallopian tubes each held a single egg measuring 6.4mm x 5.6mm. Habitat. All specimens were found in closed canopy Afrotemperate montane forest on low vegetation alongside a path. Perch heights varied from a few centimetres up to 50 cm from the ground. Etymology. Named for Isak Hattingh, who enthusiastically but unwittingly agreed to accompany the first author on a trip which tested many boundaries. He never complained once., Published as part of Tilbury, Colin R. & Tolley, Krystal A., 2015, Contributions to the herpetofauna of the Albertine Rift: Two new species of chameleon (Sauria: Chamaeleonidae) from an isolated montane forest, south eastern Democratic Republic of Congo, pp. 345-364 in Zootaxa 3905 (3) on pages 355-359, DOI: 10.11646/zootaxa.3905.3.2, http://zenodo.org/record/240513, {"references":["Tilbury, C. R. (2010) The Chameleons of Africa, an Atlas including the chameleons of Europe, the Middle East and Asia. Edition Chimaira, Germany, 831 pp.","Matthee, C. A., Tilbury, C. R. & Townsend, T. (2004) A phylogenetic review of the African leaf chameleons: genus Rhampholeon (Chamaeleonidae): the role of vicariance and climate change in speciation. Proceedings of the Royal Society of London Series B, Biological Sciences, 271, 1967 - 1976. http: // dx. doi. org / 10.1098 / rspb. 2004.2806","Branch, W. R., Bayliss, J. & Tolley, K. A. (2014) Pygmy chameleons of the Rhampholeon platyceps complex (Squamata: Chamaeleonidae): Description of four new species from isolated ' sky islands' of northern Mozambique. Zootaxa, 3814 (1), 1 - 36. http: // dx. doi. org / 10.11646 / zootaxa. 3814.1.1"]}
- Published
- 2015
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16. Contributions to the herpetofauna of the Albertine Rift: Two new species of chameleon (Sauria: Chamaeleonidae) from an isolated montane forest, south eastern Democratic Republic of Congo
- Author
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Tilbury, Colin R. and Tolley, Krystal A.
- Subjects
Reptilia ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy - Abstract
Tilbury, Colin R., Tolley, Krystal A. (2015): Contributions to the herpetofauna of the Albertine Rift: Two new species of chameleon (Sauria: Chamaeleonidae) from an isolated montane forest, south eastern Democratic Republic of Congo. Zootaxa 3905 (3): 345-364, DOI: http://dx.doi.org/10.11646/zootaxa.3905.3.2
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- 2015
17. Contributions to the herpetofauna of the Albertine Rift: Two new species of chameleon (Sauria: Chamaeleonidae) from an isolated montane forest, south eastern Democratic Republic of Congo
- Author
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TILBURY, COLIN R., primary and TOLLEY, KRYSTAL A., additional
- Published
- 2015
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18. Evolutionary relationships, species delimitation and biogeography of Eastern Afromontane horned chameleons (Chamaeleonidae: Trioceros)
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Ceccarelli, F. Sara, primary, Menegon, Michele, additional, Tolley, Krystal A., additional, Tilbury, Colin R., additional, Gower, David J., additional, Laserna, Maiti H., additional, Kasahun, Roman, additional, Rodriguez-Prieto, Ana, additional, Hagmann, Reto, additional, and Loader, Simon P., additional
- Published
- 2014
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19. Chamaeleo Laurenti 1768
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Tilbury, Colin R. and Tolley, Krystal A.
- Subjects
Chamaeleo ,Reptilia ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy - Abstract
Genus Chamaeleo Laurenti 1768 Type species: Chamaeleo chamaeleon (Linnaeus 1758) Generic synonyms: Phumanola Gray 1864. Type species Chamaeleo namaquensis Smith 1831 Calyptosaura Gray 1864. Type species Chamaeleo calyptratus Dumeril & Bibron 1851 Erizia Gray 1864. Type species Chamaeleo senegalensis Daudin 1802. Species content: africanus, anchietae, arabicus, calcaricarens, calyptratus, chamaeleon, dilepis, gracilis, laevigatus, monachus, namaquensis, necasi, senegalensis, zeylanicus. This genus has a wide ranging pan African distribution extending into Europe, the Middle East, Arabia and the Indian sub-continent (Fig. 2). One species is confined to the island of Socotra. The distribution areas of the mainland species tend to be large and continuous except for Ch. anchietae which appears to have population pockets restricted to highland plateaux. Although some species may penetrate into lowland forest, or high altitude grasslands, the species of the genus generally occupy moist and dry woodland savannahs, thorn scrub, semi desert and in one species, true desert. Apart from occipital lobes in some species and prominent parietal crests in others, they have little other head ornamentation. None of them possess horns or any form of rostro-nasal or pre-orbital projections. A gular-ventral crest of single cones is found in all species being more or less developed in the various forms from very prominent in Ch. calyptratus to almost indiscernible in Ch. namaquensis. None of the species of this genus demonstrate a temporal crest. The casque is edged in a lateral parietal crest originating as a posterior continuation of the supra-orbital ridge which delineates the posterior ramus of the squamosal bone. The temporal zone is undivided. The background scalation of the flanks is generally composed of relatively homogeneous to finely heterogeneous closely packed granular tubercles. The tail of all species within this group is smooth. The plantar surfaces are smooth and claws simple. This is the only genus where the presence of tarsal spurs is seen in several of the species (Ch. arabicus, Ch. monachus, Ch. chamaeleon, Ch. necasi, Ch zeylanicus, Ch. dilepis, Ch. gracilis, Ch. calyptratus, Ch. africanus). These tend to be best developed in males and usually absent or much reduced in females. Tarsal spurs may be a synapomorphy for the genus Chamaeleo. The basic internal lung morphology consists of two large septae arising from the region of the hilum of the lung which end freely within the lung, dividing it into three chambers viz a small dorsal, a large middle and a small ventral chamber. All species possess a gular pouch and in the lung - a membrano-fibrous diaphragm that partially separates off a small dorso-cranial compartment. Many species also have several small partial septae that arise from the dorsal wall of the lung near the cranial end. The lungs are invariably adorned with varying numbers of diverticulae that trail from the inferior and posterior margins of the lung. The diverticulae vary in length and number and may be branched (Klaver 1973, 1977, 1981). Hemipenes are calyculate, with a multi rotulae arrangement of between three to five pairs of denticulated rotulae except for Ch. arabicus and Ch. namaquensis which have retained the plesiomorphic four rotulae (two pairs) configuration (Klaver & B��hme 1986). The genus is oviparous with a cyclic reproductive strategy ��� usually a single brood but up to three clutches of eggs per year in some species in ideal conditions. These species tend to have relative longevity. Females are usually sexually mature within one year and over the next few years will produce at least one clutch of eggs annually. The parietal peritoneum is unpigmented. The documented karyotype of the several species so far examined (Matthey 1931, 1957, Matthey & van Brink 1956) is 2 n= 24 = 12 M+ 12m and appears to be restricted to this genus as a synapomorphic character (Klaver & B��hme 1986), Published as part of Tilbury, Colin R. & Tolley, Krystal A., 2009, A re-appraisal of the systematics of the African genus Chamaeleo (Reptilia: Chamaeleonidae), pp. 57-68 in Zootaxa 2079 on pages 63-65, DOI: 10.5281/zenodo.187324, {"references":["Klaver, C. J. J. (1973) Lung anatomy: aid in chameleon taxonomy. Beaufortia, 20 (269), 155 - 177.","Klaver, C. J. J. (1977) Comparative lung morphology in the genus Chamaeleo Laurenti, 1768 (Sauria: Chamaeleonidae) with a discussion of taxonomic and zoogeographic mplications. Beaufortia 25 (327), 167 - 199.","Klaver, C. J. J. (1981) Lung morphology in the Chamaeleonidae (Sauria) and its bearing on phylogeny, systematics and zoogeography. Zeitschriftfuer zoologishe Systematik Evolutionsforsch, 19, 36 - 58.","Klaver, C. J. J. & Bohme, W. (1986) Phylogeny and classification of the Chamaeleonidae (Sauria) with special reference to hemipenis morphology. Bonner Zoologische Monographien, 22, 1 - 64.","Matthey, R. (1931) Chromosomes de reptiles saurians, ophidians, chelonians. L'evolution de la formule chromosomiale chez les saurians. Revue Suisse de Zoologie 38 (9), 146 - 147.","Matthey, R. (1957) Cytologie comparee et taxonomie des Chamaeleontidae (Reptilia - Lacertilia). Revue Suisse de Zoologie 64, 709 - 732.","Matthey, R. & van Brink, J. M. (1956) Note preliminaire sur la cytologie chromosomique comparee des cameleons. Revue Suisse de Zoologie 63, 241 - 246."]}
- Published
- 2009
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20. Bradypodion ngomeense Tilbury & Tolley, 2009, sp. nov
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Tilbury, Colin R. and Tolley, Krystal A.
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Bradypodion ,Reptilia ,Bradypodion ngomeense ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy - Abstract
Bradypodion ngomeense sp. nov. Holotype: PEM-R 16621, an adult male collected by Devi Stuart-Fox and Adnan Moussalli in the Ngome Forest, KZN 27 �� 49 ���S, 31 �� 25 ��� E, on 6 th January 2004. Paratypes: PEM-R 16617 adult female, PEM-R 16612 adult male, PEM-R 16613 adult male, PEM- R 16615 adult female, PEM-R 16618 adult male, PEM-R 16620 adult female, PEM-R 16622 adult female, all collected by Devi Stuart-Fox and Adnan Moussalli with same locality and date as holotype; PEM-R 16842 sub-adult male, PEM-R 16843 adult female collected by Colin Tilbury 05/01/ 2002 same locality as the holotype; PEM-R 5689 adult male & PEM-R 5690 adult female, collected by Colin Tilbury 08/01/ 1999, Ngome Forest; PEM-R 17518, PEM-R 17519, PEM-R 17520, PEM-R 17521 all collected by Krystal Tolley 14 / 11 / 2005, locality, Ngome Forest. Diagnosis: A moderately large-bodied, long-tailed species of the genus Bradypodion demonstrating the characteristics of the genus (Tilbury et al. 2006). This species differs from its various congeners in the following respects: the adults have a relatively tall casque angled at (usually) over 30 degrees or more to the supra-orbital line in keeping with 6 other South African species - viz: B. damaranum (Boulenger 1887), B. dracomontanum Raw 1976, some B. ventrale (Gray 1845), B. thamnobates Raw 1976, B. transvaalense (Fitzsimons 1930) and B. nemorale Raw, 1978 (Qudeni ecomorph). It differs from B. ventrale which has a tail that is less than 50 % of its snout /vent length; from B. thamnobates which has prominent enlarged plate-like flank tubercles; from B. damaranum which has areas of ���naked��� interstitium around the axilla and along the anterior para-vertebral zone; from B. nemorale which has a relatively much reduced gular crest, and a dorsal crest of cones larger than the diameter of the eye-opening; and from B. transvaalense (sensu stricta) where most adult specimens usually have dorsal cones larger than the eye opening and in which the superior temporal zone is pale coloured and the black mid-temporal stripe continues uninterrupted over the upper and mid flank (Figure 3). Description of Holotype: Adult male, Snout/vent length 65mm, Tail 81mm. Casque sharply elevated posteriorly. Pre-orbital, supra-orbital, and temporal crests rugose and composed of thick conical and subconical tubercles. A low median parietal crest extends forwards from the apex of the casque to terminate just before the mid-orbital region. The temporal crests originate from the mid post-orbital rim, are prominent and composed of a row of 6 more or less equally enlarged tubercles on the right side and 5 on the left. Posteriorly, the temporal crest then rises almost vertically as the squamosal crest to run parallel and adjacent to the lateral parietal crest to the apex of the casque. A prominent gular crest is present, composed of 14 granulated composite lobes, numbers 2 ��� 6 overlapping and numbers 2 ��� 4 are broader than long. The free distal edges of the lobes have a denticulated fringe. Five to six thin white gular interstitial grooves are present on each side of the throat, enclosing chains of enlarged rounded tubercles. A prominent dorsal crest is present, composed of 26 conical tubercles roughly triangular in outline, extending from the nuchal area to the sacrum and then extending along the proximal third of the tail. The tubercles of the dorsal crest are highest over the anterior to mid vertebral line and lowest over the sacral region, none of the cones are taller than the diameter of the eye opening. Background scalation of heterogeneous, rounded to polygonal tubercles with no obvious interstitial venation between the tubercles. A short row of slightly enlarged flattened tubercles skirts the upper mid-flank. Enlarged tubercles are scattered along the para-vertebral zone. Belly tubercles arranged in pallisades of more or less homogeneous rounded tubercles. Variation in the Paratypes: The largest specimen, a female (PEM-R 16617) has a total length of 166mm (snout/vent 77mm + tail 89mm). Considerable variation in the gular crest is present among the types. The gular crest varies from 11 to 19 individual lobes or tubercles. The length and width of the lobes is variable, in some specimens all the lobes are longer than wide, in others the length / width may be similar and in some the overlapping lobes may be broader than long. Although overlap of between 2 to 7 lobes is common, in several specimens there is no overlap of any of the lobes. In 9 / 12 specimens, the first gular projection is a simple conical tubercle, and in all specimens, the last gular projection is a simple cone. Up to the last 3 gular ornaments may be simple cones. In most specimens the flanks appear to have no interstitial web, but in 2 / 14 specimens, an indication of interstitial webbing was present. The dorsal crest in the type series consisted of between 19 ��� 26 tubercles extending between the nuchal fold to the mid-sacrum. It may additionally extend for a variable distance along the tail from being almost imperceptible to easily discernable up to half of the length of the tail. The tail is always longer than the snout/vent length in both sexes. Sexual dimorphism: Males tend to have a more rugose scalation, better developed body and head crests, and a prominent hemipenal bulge at the base of the tail. Tail length differs between the sexes, being 53���57 % of the total length in males compared to 53���55 % in females. Colour differences between the sexes are discussed below. Colour in life: Male���Head above the upper labials mostly black ��� labials and all cranial crests pale yellow. Gular region and gular crest white. Nuchal fold - white to pale yellow. Skin of eyeball, heavily flecked with red around the periphery and a single dark horizontal stripe transects the eye. Background colour of the body is blue-green as is the dorsal crest. A bright red to orange flash over the mid flank is fully enclosed within a black flank patch which terminates abruptly about 2 / 3 rds of the way along the flank. The colour of the flash is variable from white to various shades of red. Belly, front legs and tail blue-green. Female ��� Background pale green. The superior and inferior temporal zones have white patches. The superior half of the anterior 2 / 3 rds of the flank is dark green, with scattered lighter tubercles (Figures 4 & 5). Hemipenes: None of the specimens currently present in any museum collection have fully everted hemipenes so the structure of these organs remains un-described for the present. Habitat: Northern Afrotemporate ���Mist Belt��� forest between 500 and 1360 meters a.s.l. characterized by a tall, but multi-layered canopy up to 30 meters with both Afrotemperate species and sub-tropical elements (Mucina & Geldenhuys 2006). The forest occupies the deeply incised southeast facing slopes of the Ntendeka cliffs. The largest trees in the Ngome Forest are specimens of the forest waterwood (Syzygium gerrardii) reaching up to 30 meters. Other trees include Podocarpus latifolius, Octea kenyensis, Faurea macnaughtonii, Olinia radiata and Trichocladus grandiflorus. The forest is rich in species of epiphytic orchids and hydrophilous ferns. Most specimens collected in the type series were found along forest paths and the road verges in bushes and trees at perch heights between 1���10 meters from the ground. Conservation: The entire known range of this species is restricted to the Ngome Forest. It is the largest fragment of Mist Belt forest in KwaZulu-Natal with an estimated area of 3360 Ha (36.6 km 2 - Mucina & Rutherford 2006.). Between 1876 and 1899, the forest was heavily logged and most of the larger Podocarpus and other hard wood species were removed or depleted. The forest has been protected since 1905. Much of the forest (2,636 Ha) is managed by the South African Department of Water Affairs and Forestry (DWAF) and protected within the Ntendeka Wilderness Area. Although some of the adjacent scarp area has been given over to pine plantations, there is no pine within the Wilderness Area. Etymology: The species is named after the Ngome Forest - the only forest known to harbor this taxon., Published as part of Tilbury, Colin R. & Tolley, Krystal A., 2009, A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus, pp. 43-57 in Zootaxa 2226 on pages 47-50, DOI: 10.5281/zenodo.190207, {"references":["Raw, L. R. G. (1976) A survey of the dwarf chameleons of Natal, South Africa, with the description of three new species (Sauria: Chamaeleonidae). Durban Museum Novitates, 11, 139 - 161.","Raw, L. R. G. (1978) A further new dwarf chameleon from Natal, South Africa (Sauria: Chamaeleonidae). Durban Museum Novitates, 11, 265 - 269.","Mucina, L. & Rutherford, M. C. (eds) (2006) The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. South African National Biodiversity Institute, Pretoria."]}
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- 2009
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21. Bradypodion Fitzinger 1843
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Tilbury, Colin R., Tolley, Krystal A., and Branch, William R.
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Bradypodion ,Reptilia ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy - Abstract
Bradypodion Fitzinger 1843 Type Species: Chamaeleo pumilus Daudin 1802 Composition: B. caffer (Boettger), B. damaranum, B. dracomontanum Raw, B. gutturale (Smith), B. kentanicum (Hewitt), B. melanocephalum, B. nemorale Raw, B. occidentale, B. pumilum, B. setaroi Raw, B. taeniabronchum, B. thamnobates Raw, B. transvaalense (Fitzsimons), B. ventrale, and several as yet undescribed species (Tolley et al. 2005; Branch et al. 2006). Characterization: The monophyly of the South African Bradypodion is established by a suite of nuclear and mitochondrial genes and can also be defined by three characteristics, namely; independently derived viviparity and the associated pigmentation of the parietal peritoneum, and a specific cranial structure with a broad roof-like parietal (interpreted as a retained symplesiomorphy) bearing supra-temporal processes (interpreted as a secondary character reversal Rieppel & Crumley 1997). External morphological features that are common to all Bradypodion include the presence of heterogeneous background scalation, a midline gular crest consisting in most species of composite lobes and cones, and the absence of a ventral crest. Rostronasal processes are absent in all species. The hemipenes are calyculate with a plesiomorphic 4 -rotulae apical ornamentation. All species are viviparous. The genus may also be characterized by lung morphology, comprising simple, adiverticulate, sac-like lungs with small ridge-like septae on the cephalic, dorsal and ventral walls and with an accessory gular pouch (Beddard 1997, Klaver 1973, 1881). However, not all Bradypodion species have been assessed. Distribution: Restricted to South Africa, ranging into adjacent Swaziland, and possibly Lesotho and southern Mozambique, with introduced populations in Namibia, and occupying a wide variety of habitats., Published as part of Tilbury, Colin R., Tolley, Krystal A. & Branch, William R., 2006, A review of the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera, pp. 23-38 in Zootaxa 1363 on page 34, DOI: 10.5281/zenodo.174715, {"references":["Fitzinger, L. J. (1843) Systema Reptilium Auctore Leopoldo Fitzinger. Vindobonnae (Vienna).","Tolley, K. A., Tilbury, C. R., Branch, W. R. & Matthee, C. A. (2005) The dwarfs of Africa: taxonomy, distribution and diversity of dwarf chameleons (Bradypodion sensu lato). In Abstracts, Fifth World Conference of Herpetology, Stellenbosch, South Africa, 2005, pp. 156.","Branch, W. R., Tolley, K. A., & Tilbury, C. R. (2006) A new Dwarf Chameleon (Sauria: Bradypodion Fitzinger 1843) from the Cape Fold Mountains, South Africa. African Journal of Herpetology, in press.","Rieppel, O. & Crumley, C. (1997) Paedomorphosis and skull structure in Malagasy chamaeleons (Reptilia: Chamaeleoninae), Journal of Zoology (London), 243, 351 - 380.","Klaver, C. J. J. (1973) Lung anatomy: aid in chameleon taxonomy. Beaufortia, 20, 155 - 177."]}
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- 2006
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22. Nadzikambia
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Tilbury, Colin R., Tolley, Krystal A., and Branch, William R.
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Reptilia ,Squamata ,Animalia ,Nadzikambia ,Biodiversity ,Chordata ,Chamaeleonidae ,Taxonomy - Abstract
Nadzikambia genus nova Type Species: Chamaeleo mlanjensis Broadley 1966 Composition: Nadzikambia mlanjense Characterisation: The monophyly of Nadzikambia is established on the basis of a suite of mitochondrial and nuclear genetic characters and a unique hemipenis. The latter is rather short and stout with a short pedicel and shallow calyces. There are no rotulae on the apex, which are replaced with a pair of large fleshy, papillate lobes with scalloped edges. At the sulcal base of each lobe are one or two pedunculated papillae (Klaver & B��hme 1986). The lungs show a structure similar to that of Kinyongia, with two pairs of long diverticulae trailing from the inferior and posterior surfaces of the lung. A series of four small septae alternate with five larger septae across the dorsal wall with several smaller septae arising from the ventral and cephalic walls. There is no gular pouch (Klaver 1977). The parietal peritoneum is unpigmented and reproduction oviparous. The external morphology is largely conservative, and gular and ventral crests are absent. There is a weak dorsal crest, finely heterogeneous scalation that forms rosettes of tubercles on the lower flanks, and a low casque. Although cranial morphology remains undescribed, the external appearance of the cranial crests suggest that the cranium is constructed in the same manner as Kinyongia. Distribution: Only known from sub-montane forest habitats in a few scattered localities on the Mulanje Massif in southern Malawi, Central Africa. Etymology: The name is derived from ���Nadzikambe���, the name for chameleon in ChiChewa, the language used by the tribe that lives in the area around Mulanje Mountain in southern Malawi. The name Nadzikambe is Latinised by terminating it with the suffix ia thus giving it a feminine gender., Published as part of Tilbury, Colin R., Tolley, Krystal A. & Branch, William R., 2006, A review of the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera, pp. 23-38 in Zootaxa 1363 on pages 35-36, DOI: 10.5281/zenodo.174715, {"references":["Klaver, C. J. J. & Bohme, W. (1986) Phylogeny and classification of the Chamaeleonidae (Sauria) with special reference to hemipenis morphology. Bonner zoologische Monographisce 22, 1 - 64."]}
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- 2006
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23. Kinyongia
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Tilbury, Colin R., Tolley, Krystal A., and Branch, William R.
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Reptilia ,Squamata ,Animalia ,Biodiversity ,Chordata ,Chamaeleonidae ,Kinyongia ,Taxonomy - Abstract
Kinyongia genus nova Type Species: Chamaeleo fischeri fischeri Reichenow 1887. Composition: K. adolfifriderici, K. carpenteri, K. excubitor, K. fischeri fischeri, K. fischeri multituberculatum (Nieden), K. fischeri uluguruense (Loveridge), K. tavetanum, K. tavetanum boehmei (Lutzman & Nečas), K. uthmoelleri, K. xenorhinum, K. oxyrhinum, and K. tenue Characterization: The monophyly of Kinyongia is established on the basis of a suite of nuclear and mitochondrial genetic characters. No morphological synapomorphy is known to define all members. Cranial structure has only been studied in K. fischeri (Rieppel & Crumley 1997). The parietal is reduced to a narrow posteriorly projecting sagittal process that meets the ascending squamosal processes at the apex of the casque to completely enclose the temporal fossa. This derived condition is similar to that found in the genera Chamaeleo, Furcifer and Calumma (Rieppel 1981, 1987, Rieppel & Crumley 1997). Scalation is generally of finely heterogeneous granules or flattened polygonal tubercles. In those species that are characterized by a head ornamentation of fused rostronasal projections (carpenteri, xenorhinum, tenue and oxyrhinum), the scalation is generally an unordered heterogeneous mix of tubercles. In species with paired rostronasal projections (fischeri, tavetanum, uthmoelleri) the flanks are adorned with tubercles clustered into “rosettes”, especially on the lower flanks. This rosetting is also seen in the hornless species excubitor. Plantar surfaces are smooth and claws are simple. None of the species have midline gular or ventral crests, occipital lobes, or annulated horns. Cranial ornamentation in some species, e.g. paired rostronasal blade-like horns in fischeri and tavetanum, and fusion of the canthal ridges into a single vertically flattened process in carpenteri, xenorhinum, tenue and oxyrhinum, are similar to features found in the Malagasy genera Calumma and Furcifer. Lung structure is relatively plesiomorphic. They are similar to those of Bradypodion and Malagasy Calumma and Furcifer, being generally simple with a number of small septae on the dorsal, cephalic and ventral walls. The lungs of Kinyongia appear to lack the accessory gular pouch and usually have trailing diverticulae from the posteroinferior surface of the lung (tavetanum, fischeri, tenue, and adolfifriderici) although these are lacking in K. xenorhinum (Klaver 1977, 1981). The lungs in the rest of the species of Kinyongia have not as yet been described. The hemipenes are calyculate with a plesiomorphic 4 rotulae apical ornamentation, and all the species are oviparous. Distribution: Distributed in East Africa with the most westerly species, K. adolfifriderici, extending into the eastern DRC, and K. excubitor reaching as far north as Mount Kenya. They are confined to tropical/sub-tropical forest biomes, often in relict montane or sub-montane forests (Fig. 1). Etymology: This genus is largely confined to the three countries that make up the central east African region namely Kenya, Tanzania and Uganda. The lingua franca for this region is Swahili. The name derives from the generic Swahili name for chameleon “Kinyonga” and identifies it as a genus that is largely confined to Swahili speaking countries. The name is Latinized by terminating the name spelling with the letters ia giving it a feminine gender. Thus the specific names remain unaltered.
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- 2006
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24. A new species of Chameleon (Sauria: Chamaeleonidae: Kinyongia) highlights the biological affinities between the Southern Highlands and Eastern Arc Mountains of Tanzania.
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Menegon, Michele, Loader, Simon P., Davenport, Tim R. B., Howell, Kim M., Tilbury, Colin R., Machaga, Sophy, and Tolley, Krystal A.
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CHAMELEONS ,MOUNTAINS ,UPLANDS ,GENETICS ,BIOLOGY - Abstract
A new species of chameleon is described from the Livingstone and Udzungwa Mountains of Tanzania. The new species is morphologically most similar to Kinyongia vanheygeni. Furthermore, a single, short rostral appendage shows the species similarity to other Eastern Arc endemic Kinyongia species (e.g. K. uthmoelleri, K. oxyrhina, K. magomberae and K. tenuis). Females of all these species lack any rostral ornamentation and are all very similar morphologically. Males of the new species, on which the morphological diagnosis is based, can be distinguished from other Kinyongia by a shorter rostral appendage that bifurcates at the tip. They are easily distinguished from K. vanheygeni, otherwise the most similar species, by differences in head scalation and the length and shape of the rostral appendage. The new species is associated with montane rainforest and is known from only four forest fragments of which two are in the Udzungwa and two in the Livingstone Mountains. Phylogenetically, the new species is sister to K. tenuis and K. magomberae, which together, form a clade that also contains K. oxyrhina. The disjunct distribution of the new species, in the Livingstone and Udzungwa mountains, stretches across the 'Makambako Gap' which is a putative biogeographical barrier separating the distinct faunas of the Southern highlands and Eastern Arc Mountains. Evidence from this species however, points to potentially closer biological affinities between the Livingstone and Udzungwa mountains. [ABSTRACT FROM AUTHOR]
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- 2015
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25. A new species of dwarf chameleon (Sauria; Chamaeleonidae, Bradypodion Fitzinger) from KwaZulu Natal South Africa with notes on recent climatic shifts and their influence on speciation in the genus
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TILBURY, COLIN R., primary and TOLLEY, KRYSTAL A., additional
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- 2009
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26. A new species of chameleon (Sanria: Chamaeleonidae:Kinyongia) from the Magombera forest and the Udzungwa Mountains National Park, Tanzania
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Menegon, Michele, primary, Tolley, Krystal A., additional, Jones, Trevor, additional, Rovero, Francesco, additional, Marshall, Andrew R., additional, and Tilbury, Colin R., additional
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- 2009
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27. A re-appraisal of the systematics of the African genus Chamaeleo (Reptilia: Chamaeleonidae)
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TILBURY, COLIN R., primary and TOLLEY, KRYSTAL A., additional
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- 2009
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28. Corrections to species names recently placed in Kinyongia and Nadzikambia (Reptilia: Chamaeleonidae)
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TILBURY, COLIN R., primary, TOLLEY, KRYSTAL A., additional, and Branch, William R., additional
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- 2007
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29. A new Dwarf Chameleon (Sauria:BradypodionFitzinger, 1843) from the Cape Fold Mountains, South Africa
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Branch, William R., primary, Tolley, Krystal A., additional, and Tilbury, Colin R., additional
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- 2006
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30. A review of the systematics of the genus Bradypodion (Sauria: Chamaeleonidae), with the description of two new genera
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TILBURY, COLIN R., primary, TOLLEY, KRYSTAL A., additional, and BRANCH, WILLIAM R., additional
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- 2006
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31. A phylogenetic review of the African leaf chameleons: genus Rhampholeon (Chamaeleonidae): the role of vicariance and climate change in speciation
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Matthee, Conrad A., primary, Tilbury, Colin R., additional, and Townsend, Ted, additional
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- 2004
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32. Phylogenetics of the southern African dwarf chameleons, Bradypodion (Squamata: Chamaeleonidae)
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Tolley, Krystal A., primary, Tilbury, Colin R., additional, Branch, William R., additional, and Matthee, Conrad A., additional
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- 2004
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33. A re-evaluation of the generic assignment of Bradypodion spinosum (Matschie, 1892) and some considerations on the genus Rhampholeon Günther, 1874
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Tilbury, Colin R, primary and Mariaux, Jean, additional
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- 2004
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34. A new dwarf forest chameleon (Sauria:RhampholeonGünther 1874) from Malawi, central Africa
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Tilbury, Colin R., primary
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- 1992
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35. A new species ofChamaeleoLaurenti 1768 (Reptilia Chamaeleonidae) from a relict montane forest in northern Kenya
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Tilbury, Colin R., primary
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- 1991
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36. A new species of chameleon (Sauria: Chamaeleonidae: Kinyongia) from the Magombera forest and the Udzungwa Mountains National Park, Tanzania.
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MENEGON, MICHELE, TOLLEY, KRYSTAL A., JONES, TREVOR, ROVERO, FRANCESCO, MARSHALL, ANDREW R., and TILBURY, COLIN R.
- Abstract
The article presents a study that deals with a new species of chameleon Kinyongia magomberae sp. nov. or the Magombera chameleon found in the Magombera forest and the Udzungwa Mountains National Park in Tanzania. Phylogenetic analyses using mitochondrial and nuclear markers helped determine the specie status. A single rostral appendage made the new chameleon similar with K. tenuis and the more widespread Eastern Arc endemic K. oxyrhina. It is determined as sister to K. tenuis and part of a clade that also contains K. oxyrhina.
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- 2009
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37. AN ANNOTATED CHECKLIST OF SOME OF THE COMMONER REPTILES OCCURRING AROUND RIYADH, KINGDOM OF SAUDI ARABIA
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TILBURY, COLIN R., primary
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- 1988
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38. A phylogenetic review of the African leaf chameleons: genus Rhampholeon (Chamaeleonidae): the role of vicariance and climate change in speciation.
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Matthee CA, Tilbury CR, and Townsend T
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- Africa, Animals, Base Sequence, Bayes Theorem, DNA, Mitochondrial genetics, Evolution, Molecular, Genes, RAG-1 genetics, Geography, Models, Genetic, Molecular Sequence Data, Sequence Analysis, DNA, Species Specificity, Climate, Lizards classification, Lizards genetics, Phylogeny
- Abstract
The phylogenetic associations among 13 currently recognized African leaf chameleon species were investigated by making use of mitochondrial and nuclear DNA sequence data (44 taxa and 4145 characters). The gene tree indicates two divergent clades within Rhampholeon; this finding is congruent with previous morphological suggestions. The first clade (I) comprises three taxa (R. kerstenii, R. brevicaudatus and R. brachyurus) and is widely distributed in lowland forest and or non-forest biomes. The second clade (II) comprises the remaining Rhampholeon species and can be subdivided into three subclades. By contrast, most taxa belonging to clade II are confined to relict montane forest biotopes. Based on geographical, morphological and molecular evidence, it is suggested that the taxonomy of Rhampholeon be revised to include two genera (Rieppeleon and Rhampholeon) and three subgenera (Rhampholeon, Bicuspis and Rhinodigitum). There is a close correlation between geographical distribution and phylogenetic relatedness among Rhampholeon taxa, indicating that vicariance and climate change were possibly the most influential factors driving speciation in the group. A relaxed Bayesian clock suggests that speciation times coincided both with the northern movement of Africa, which caused the constriction of the pan African forest, and to rifting in east Africa ca. 20 Myr ago. Subsequent speciation among taxa was probably the result of gradual desiccation of forests between 20 and 5 Myr ago.
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- 2004
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