Search

† CRETACEOZOMUS ANGUSTOCAUDATUS DE FRANCESCO MAGNUSSEN SP. NOV. FRANCESCO MAGNUSSEN SP. NOV. (FIGS 6–8) Zoobank registration: urn:lsid:zoobank.org:act: 7B08CF32-2C1F-4507-BA94-C87B97CFCCFB Type material: Holotype (F i g. 6A –D), a d u l t homeomorphic ♂, collection no. GPIH04896; ex collection Patrick Müller (no. BUB06). Diagnosis † Cretaceozomus angustocaudatus differs from † Cretaceozomus robustus by its thick pedipalps, femur of leg IV 3.1 times longer than deep and flagellum slender and oblong. Etymology The specific epithet is derived from the Latin words angustus, narrow, and cauda, tail, referring to the shape of the male flagellum. It is masculine in gender. Description Total length from anterior dorsal process to base of the flagellum ~ 3 mm. Colour (in amber): Dorsal side dark brown; patella, tibia and tarsus of the legs II–IV golden to light brown; ventral side golden brown; flagellum and pedipalps dark brown, original colouring equivocal. Prosoma (Fig. 7A, B): Length 1.36 mm; propeltidium length 1.12 mm, width 0.56 mm. Anterior process long and broad, length 0.18 mm; setation: two setae next to each other followed by a single median seta. Propeltidium setation: four pairs of setae, first pair aborted, tubercles visible, following three pairs left ones visible, right ones aborted. Corneate eyes present, clearly elevated above the surface of the propeltidium. Mesopeltidium width (left) 0.2 mm. Metapeltidium not divided (Fig. 8A, B), length 0.32 mm, width 0.64 mm. Anterior sternum with> 10 + 2 sternapophysial setae, length 0.31 mm, width 0.26 mm. Posterior sternum with seven setae, length 0.19 mm, width 0.25 mm. Chelicerae: Setation of the mesal side of chelicerae not visible, except for G6-1. Pedipalps: Robust, without armature except for a mesal spur on trochanter (Fig. 7C, D); trochanter produced distally, setation: one+ mesal, five ventral, two ventroectal, one+ ectal; femur: longer than trochanter, setation: eight+ dorsal, two+ dorsomesal, two+ ectal, three + mesal, one + ventral, two + dorsoectal, t w o+ v e n t r o e c t a l; p a t e l l a: l o n g e r t h a n f e m u r, setation: one+ mesal, four+ ectal, two+ dorsomesal, two+ dorsoectal, five dorsal; tibia: shorter than patella, setation: six dorsomesal, two+ ventromesal, four+ ectal, six dorsoectal, five+ mesal, six dorsal; tarsus: setation: two+ dorsoectal, two+ dorsomesal; claw not visible. Legs: Right leg I aborted at the end of the trochanter, left leg incomplete, tarsus missing, leg I ≥ 1.05 times longer than the body; anterodorsal margin of femur of leg IV produced at an angle of ~90°, femur of leg IV 3.1 times longer than deep, leg IV> 1.08 times longer than the total body length; leg formula presumed: 1423. Opisthosoma: Not entirely visible, length 1.60– 1.65 mm, width 0.9 mm; segments X–XII not elongated, segments IX–XII not visible owing to overlaying debris. Abdominal tergites setation: I–IV: Dm; V: not visible; VI: Dm, Dl1; VII: Dm, Dl1; VIII: Dm, Dl1; XI–XII not visible; setation pattern: 2:2:2:2:?:4:4:4:?:?:?:?. Flagellum: slim, dorsoventrally flattened with a slender and oblong shape (Fig. 8C, D), length 0.27 mm, width 0.18 mm; stalk length 0.09 mm; setation: Dm1 not visible; Dm4; Dl2 paired, sitting lateral; Dl3 paired, with the left one aborted; Vm1; Vm2 paired; Vm3 paired; Vm5; Vl2 paired. Pair Vl1 absent in this species. Further measurements: Pedipalp: trochanter 0.41 mm; femur 0.53 mm; patella 0.63 mm; tibia 0.49 mm; tarsus> 0.20 mm; claw not measurable; total length> 2.26 mm. Leg I: trochanter 0.20 mm; femur 1.09 mm; patella 1.11 mm; tibia> 0.75 mm; metatarsus not measurable; tarsus not measurable; total length> 3.15 mm. Leg II: trochanter 0.18 mm; femur 0.73 mm; patella 0.43 mm; tibia 0.51 mm; metatarsus 0.34 mm; tarsus (tarsus segments) 0.34 mm (0.12 mm; 0.08 mm; 0.14 mm); total length 2.53 mm. Leg III: trochanter 0.20 mm; femur 0.67 mm; patella 0.33 mm; tibia 0.38 mm; metatarsus 0.29 mm; tarsus (tarsus segments) 0.32 mm (0.14 mm; 0.08 mm; 0.10 mm); total length 2.19 mm. Leg IV: trochanter 0.22 mm; femur 1.09 mm; patella 0.36 mm; tibia 0.61 mm; metatarsus 0.56 mm; tarsus (tarsus segments) 0.39 mm (0.16 mm; 0.09 mm; 0.14 mm); total length 3.23 mm., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 802-806, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082

† GROEHNIZOMUS RODRIGOI S.P. MÜLLER SP. NOV. (FIGS 20–23) Zoobank registration: urn:lsid:zoobank.org:act: 97BC6CF7-BF6A-48C1-968E-069699D99D4A Ty p e m a t e r i a l: Holotype (Fig. 2 0A–D), adult homeomorphic ♂, collection no. GPIH04891, ex collection Patrick Müller (no. BUB83). Diagnosis † Groehnizomus rodrigoi differs from † G. oculiferans by the state of the metapeltidium, which is divided in † G. oculiferans and entire in † G. rodrigoi. Although the state of the metapeltidium is no longer considered diagnostic at genus level (Lawrence, 1969), this character still shows great consistency within a given genus. Therefore, we consider † G. rodrigoi to be distinct from † G. oculiferans. Etymology The genus name is a patronym for Rodrigo MonjarazRuedas from the Universidad Nacional Autónoma de México and honours his outstanding contribution to modern schizomid taxonomy and phylogenetics. It is masculine in gender. Description Total length from anterior margin of the propeltidium to base of flagellum 2.72 mm. C o l o u r: L i g h t–d a r k b r o w n, o r i g i n a l c o l o u r i n g equivocal. Prosoma: Length 1.08 mm; propeltidium length 0.87 mm, width 0.38 mm. Anterior process with a single seta followed by a pair of setae. Further setation of propeltidium a single seta followed by four pairs of setae, all four pairs aborted (Fig. 21C, D). Corneate eyes present, clearly elevated above the surface of the propeltidium. Mesopeltidia length> 0.13 mm, width equivocal. Metapeltidium not divided (Fig. 21A, B), length 0.58 mm, width 0.28 mm. Anterior sternum with 12 + 2 sternapophysial setae. Posterior sternum with 5+ setae. Pedipalps: Stout and clearly shorter than the body length, without armature (Fig. 22A, B), mesal spur not visible; trochanter not produced anteriorly, setation: six strong, long ventral, six+ small ventromesal–ventroectal; femur setation: six+ dorsal, one dorsomesal, three ventral; patella slightly longer than femur, setation: three dorsal, three dorsomesal, one dorsoectal, two ventroectal, two ventral; tibia shorter than patella, setation: three+ dorsal, four dorsoectal, nine ventroectal–ventromesal, mesal setation equivocal; tarsus about two-thirds length of tibia, setation: three+ dorsoectal, three mesal, four ventromesal, dorsal setation equivocal; tarsal spurs equivocal; claw slightly shorter than half the length of tarsus. Chelicerae: Setation of the mesal side of chelicerae not visible, except for G6-1. 822 I. DE FRANCESCO MAGNUSSEN ET AL. Legs: Anterodorsal margin of femur of leg IV produced at an angle of ~90°; leg IV 1.37 times longer than the body, femur of leg IV slender, 3.27 times longer than deep; leg formula: 1423. Opisthosoma: Length 1.63 mm, width 0.60 mm; tergites X–XII not elongated. Abdominal tergites setation: I: Dm, five microsetae; II: Dm; III–XII: disrupted; setation pattern: 2 + 5:2:?:?:?:?:?:?:?:?:?:?. Flagellum: dorsoventrally flattened, rounded to subrhomboidal (Fig. 23A–D), length 0.30 mm, width 0.24 mm; stalk length 0.07; setation: Dm1 (lost), Dl2 paired, Dm4 (lost), Dl3 paired, Vm1, Vm2 paired, Vm3 paired, Vl1 paired, Vm5, Vl2 paired. Further measurements: Pedipalp: trochanter 0.36 mm; femur 0.49 mm; patella 0.55 mm; tibia 0.36 mm; tarsus 0.21 mm; total length 1.97 mm. Leg I: trochanter 0.27 mm; femur 1.20 mm; patella 1.52 mm; tibia 1.04 mm; metatarsus 0.34 mm; tarsus 0.41 mm; total length 4.78 mm. Leg II: trochanter 0.17 mm; femur 0.69 mm; patella 0.38 mm; tibia 0.52 mm; metatarsus 0.47 mm; tarsus 0.37 mm; total length 2.60 mm. Leg III: trochanter 0.16 mm; femur 0.66 mm; patella 0.26 mm; tibia 0.38 mm; metatarsus 0.43 mm; tarsus 0.39 mm; total length 2.28mm. Leg IV: trochanter 0.24 mm; femur 1.21 mm; patella 0.49 mm; tibia 0.72 mm; metatarsus 0.65 mm; tarsus 0.41 mm; total length 3.72 mm., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 818-822, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082, {"references":["Lawrence RF. 1969. The Uropygi (Arachnida: Schizomidae) of the Ethiopian Region. Journal of Natural History 3: 217 - 260."]}

Short-tailed whipscorpions are a small arachnid order with 379 described species from (sub)tropical regions of the world. The order has a fragmentary fossil record but has left a rich, albeit hitherto undocumented, fossil legacy in mid-Cretaceous amber from Myanmar, also called Burmese amber or Burmite. Here, we review a large series of schizomids from this type of amber and propose four new genera for seven new species. In addition, we include a short revision of all schizomid genera based on 14 morphological characters. Although none of the fossils can be assigned to Recent genera, they resemble the modern fauna in general morphology and highlight relative morphological stasis in this arachnid order. The fossils show a general trend towards eye reduction, but some of the specimens retain corneate eyes. Comparative data suggest affinities of the fossils with the Recent Old World fauna rather than American relatives. Furthermore, the fossils provide evidence for a Gondwanan origin of the Burma Terrane. Overall, the data suggest a high diversity at both species and genus levels for Burmese amber schizomids. We discuss potential reasons for this richness that will probably necessitate the description of additional genera and species in future studies.

† MUELLERIZOMUS AMANDAE DE FRANCESCO MAGNUSSEN & S.P. MÜLLER SP. NOV. MAGNUSSEN & S.P. MÜLLER SP. NOV. (FIGS 27–31) Zoobank registration: urn:lsid:zoobank.org:act: 63A0355B-C647-414E-8C0F-2C5BD807495E Type material: Holotype (Fig. 27 A – D), adult homeomorphic ♂, collection no. GPIH04895, ex collection Patrick Müller (no. BUB3553); paratype (Fig. 29A–D), adult ♀, GPIH04892, ex collection Patrick Müller (no. BUB557). Remarks The female specimen is matched with the male holotype of † Mu. amandae because both share the following characters: propeltidium with a single median seta followed by three pairs of setae; corneate eyes or eyespots absent; body without clavate setae; anterodorsal margin of femur of leg IV produced at an angle of ~90°; tergite II with one pair of setae; tergites X–XII not elongated. Diagnosis † Muellerizomus amandae differs from its congener † Mu. palicaudatus by the lack of eyespots and a more rounded male flagellum shape. Etymology The specific epithet name is a patronym for Dr Amanda Eva Bauzá Iraola, former directorial assistant of the Center of Natural History in Hamburg, for her outstanding commitment to staff and collectionbased science during the past years. It is feminine in gender. Description Total length from anterior dorsal process to base of the flagellum 1.83 mm. Colour (in amber): Golden brown; prosoma and pedipalps with a slightly darker touch of brown than the opisthosoma; femur and patella of leg IV light brown; all the other legs and flagellum golden yellowish and translucent. Prosoma: Length 0.80 mm; propeltidium length 0.47 mm, width 0.27 mm. Anterior process much rounded, without tip, length 0.03 mm; setation: one seta on the right side of the anterior process, which implies an aborted seta on the left, but definite setation remains unclear. Further propeltidium setation: a single median seta followed by three pairs of setae (paratype Fig. 30A, B). Neither corneate eyes nor eyespots present. Mesopeltidia and metapeltidium compressed owing to taphonomic processes to the point where the dimensions cannot be measured. Ventral side of the prosoma pressed inwards into the propeltidium. Anterior sternum: not entirely visible, with more than 3 + 2 sternapophysial setae, length and width not measurable owing to the compression of the ventral side of the prosoma. Posterior sternum not visible. Chelicerae: Setation of the mesal side of chelicerae not visible, except for G6-1. Pedipalps: Without armature, mesal spur not visible; trochanter hardly visible, setation: three+ strong setae ventral; femur: setation: two+ dorsal, two+ dorsoectal, two+ dorsomesal; patella: setation: four ventromesal, two mesal, four dorsomesal, three ectal, three dorsal; tibia: shorter than patella, setation: five dorsal, three ventromesal, four dorsoectal, three ventral; tarsus: with small, thin, asymmetrical tarsal spurs, spur length 0.01 mm, setation: two+ dorsal, four dorsomesal, four mesal; claw: bent downwards, slightly longer than half the length of tarsus. Legs: Legs I well preserved and complete on each side, tarsus with six segments, leg I ~1.42 times longer than the body; anterodorsal margin of femur of leg IV produced at an angle of ~90°, femur of leg IV 2.71 times longer than deep, leg IV 1.19 times longer than the total body length, leg formula: 1423. Opisthosoma: Length 1.03 mm, width 0.51 mm; segments XI – XII partly retracted into the opisthosoma, XII with a posterodorsal process, slightly bent upwards. Abdominal tergites setation: I–VIII: Dm; IX: Dl1; X: not visible; XI: Dl1, XII: Dm, Dl1, setation pattern: 2:2:2:2:2:2:2:2:2:?:2:4. Flagellum of male: dorsoventrally flattened, nearly round and flat, with an apical tip at the posterior end, two small depressions near the posterior end on the dorsal side of the flagellum (Fig. 28A–D), length 0.22 mm, width 0.21 mm; stalk length 0.06 mm; setation: Dm1, Dl2 paired, Dm4, Dl3 paired, Vm1, Vm2 paired, Vm3 paired, Vl1 paired, Vm5, Vl2 paired. Paratype female: Metapeltidium barely divided (Fig. 30C, D); pedipalp trochanter with mesal spur, claw slightly longer than half the length of the tarsus; body size 2.35 mm; leg IV 0.89 times longer than the total body length, femur of leg IV 2.76 times longer than deep; flagellum with three annuli, flagellomeres I, II, III, V + VI (Fig. 31A, B), total length 0.27 mm, lengths of segments: 0.05 mm, 0.05 mm, 0.03 mm, 0.12 mm; setation: Dm1, Dm4, Vm1 missing, Vm2 paired, left one probably lost, Vm3 paired, Vm5, Dl1 paired, right one lost, Dl2 paired, Dl3 paired, Dl4 absent, Vl1 paired, Vl2 paired. Holotype further measurements: Pedipalp: trochanter not measurable; femur not measurable; patella 0.28 mm; tibia 0.17 mm; tarsus 0.12 mm; claw 0.07 mm; total length not measurable. Leg I: trochanter 0.14 mm; femur 0.68 mm; patella 0.55 mm; tibia 0.7 mm; metatarsus 0.21 mm; tarsus (tarsus segments) 0.31 mm (0.03 mm; 0.04 mm; 0.04 mm; 0.03 mm; 0.05 mm; 0.12 mm); total length 2.59 mm. Leg II: trochanter> 0.05 mm; femur 0.41 mm; patella 0.26 mm; tibia 0.26 mm; metatarsus 0.25 mm; tarsus (tarsus segments) 0.22 mm (0.09 mm; 0.06 mm; 0.07 mm); total length> 1.45 mm. Leg III: trochanter 0.13 mm; femur 0.34 mm; patella 0.21 mm; tibia 0.22 mm; metatarsus 0.24 mm; tarsus (tarsus segments) 0.22 mm (not measurable); total length 1.36 mm. Leg IV: trochanter 0.16 mm; femur 0.65 mm; patella 0.24 mm; tibia 0.45 mm; metatarsus 0.39 mm; tarsus (tarsus segments) 0.29 mm (0.12 mm; 0.06 mm; 0.11 mm); total length 2.18 mm. Paratypefurthermeasurements: P edipalp:trochanterand femur not measurable; patella 0.25 mm; tibia 0.34 mm; tarsus 0.17 mm; total length not measurable. Leg I: trochanter 0.18 mm; femur 0.59 mm; patella 0.72 mm; tibia 0.53 mm; metatarsus 0.20 mm; tarsus 0.33 mm; total length 2.55 mm. Leg II: trochanter 0.13 mm; femur 0.41 mm; patella 0.27 mm; tibia 0.32 mm; metatarsus 0.24 mm; tarsus 0.26 mm; total length 1.63 mm. Leg III: trochanter 0.16 mm; femur 0.43 mm; patella 0.10 mm; tibia 0.19 mm; metatarsus 0.22 mm; tarsus 0.17 mm; total length 1.27 mm. Leg IV: trochanter 0.25 mm; femur 0.72 mm; patella 0.19 mm; tibia 0.34 mm; metatarsus 0.32 mm; tarsus 0.28 mm; total length 2.10 mm., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 824-829, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082, {"references":["Muller SP, Dunlop JA, Kotthoff U, Hammel JU, Harms D. 2019. The oldest short-tailed whipscorpion (Schizomida): a new genus and species from the Upper Cretaceous amber of northern Myanmar. Cretaceous Research 106: 104227."]}

† CRETACEOZOMUS ROBUSTUS DE FRANCESCO MAGNUSSEN SP. NOV. MAGNUSSEN SP. NOV. (FIGS 9–11) Zoobank registration: urn:lsid:zoobank.org:act: 5CCD94A5-55B5-44A2-929C-F441016866F9 Type material: Holotype (F i g. 9A –D), a d u l t homeomorphic ♂, collection no. GPIH05048; ex collection Carsten Gröhn (no. 11206). Diagnosis † Cretaceozomus robustus can be characterized by the following features: femur of leg IV 2.76 times longer than wide; flagellum shape semi-oval but thicker near the stalk of the flagellum. Etymology The specific epithet is the Latin, robustus, stout, referring to the robust body shape of the specimen. It is masculine in gender. Description Total length from anterior dorsal process to base of the flagellum ~ 2.86 mm. Colour (in amber): Pedipalps dark brown reddish; prosoma dark brown to reddish; metapeltidial region lighter brown yellowish; femora dark brown-reddish, other leg segments golden-ochre; chelicerae dark brown; opisthosoma dark brown; flagellum golden brown; original colouring equivocal. Prosoma: Length 1.25 mm; propeltidium length 1.07 mm, width 0.66 mm. Anterior process bent downwards with an apical tip, length 0.07 mm; setation: two setae next to each other followed by a single median seta. Propeltidium setation: four pairs of setae, first and second pair complete, third pair missing the left and fourth pair missing the right one owing to preservation (Fig. 10C, D). Corneate eyes present, clearly elevated above the surface of the propeltidium. Mesopeltidium width 0.2 mm. Metapeltidium not divided (Fig. 10A, B), length 0.31 mm, width 0.73 mm. Anterior sternum not entirely visible, with> 4 + 2 sternapophysial setae, length 0.31 mm, width not measurable owing to taphonomic processes. Posterior sternum covered by a syninclusion and not visible. Chelicerae: Setation on the mesal side of chelicerae not visible, except for G6-1 and some setae of G1 and G2. Pedipalps: Without armature except for a mesal spur on trochanter; trochanter setation: six ventral strong setae, three ventroectal, three mesal setae in tubercles; femur: longer than trochanter, setation: seven dorsal, two ectal, two+ dorsomesal, two+ mesal; patella: shorter than femur, setation: three mesal, seven ectal, four dorsomesal, four dorsoectal, three dorsal; tibia: shorter than patella, setation: five dorsomesal, four ventromesal, five ectal, three dorsoectal, nine mesal, two dorsal; tarsus: with asymmetrical tarsal spurs, spur length: 0.03 mm, setation: five ectal, four dorsoectal, three dorsal, four dorsomesal, five mesal; claw: long and straight, slightly longer than half the length of tarsus. Legs: Right leg I aborted at the end of the coxa, left leg well preserved and complete, tarsus with six segments, leg I ~1.29 times longer than the body; anterodorsal margin of femur of leg IV produced at an angle of ~90°, leg IV 2.76 times longer than deep; leg IV 1.15 times longer than the total body length; leg formula: 1423. Opisthosoma: Length 1.61 mm, width 0.93 mm (opisthosoma compressed owing to preservation). Tergites X–XII not elongated, tergite XII with a small posterodorsal process. Abdominal tergites setation: I– VII: Dm; VIII: Dm, Dl1, left one missing; IX: Dl1, Dl2; X: not visible; XI: Dl1, Dl2; XII: Dm, Dl1; setation pattern: 2:2:2:2:2:2:2:4:4:?:4:4. Flagellum: dorsoventrally flattened, semioval shape, broader near the stalk, slightly more slender at the posterior end, tip rounded (Fig. 11A–D), length 0.34 mm, width 0.33 mm; stalk length 0.14 mm; setation: Dm1 not visible; Dm4; Dl2 paired, sitting lateral; Dl3 paired with the left one aborted; Vm1; Vm2 paired; Vm3 paired; Vm5; Vl2 paired with right one aborted; between Dl2 and Dl3 four microsetae on each side. Pair Vl1 absent in this species. Further measurements: Pedipalp: trochanter 0.39 mm; femur 0.63 mm; patella 0.56 mm; tibia 0.49 mm; tarsus 0.24 mm; claw 0.14 mm; total length 2.45 mm. Leg I: trochanter 0.23 mm; femur 0.84 mm; patella 0.94 mm; tibia 0.95 mm; metatarsus 0.35 mm; tarsus (tarsus segments) 0.39 mm (0.06 mm; 0.06 mm; 0.06 mm; 0.05 mm; 0.05 mm; 0.11 mm); total length 3.70 mm. Leg II: trochanter 0.16 mm; femur 0.73 mm; patella 0.45 mm; tibia 0.35 mm; metatarsus 0.42 mm; tarsus (tarsus segments) 0.36 mm (0.19 mm; 0.07 mm; 0.10 mm); total length 2.47 mm. Leg III: trochanter 0.20 mm; femur 0.72 mm; patella 0.30 mm; tibia 0.32mm; metatarsus 0.44 mm; tarsus (tarsus segments) 0.31 mm (0.13 mm; 0.06 mm; 0.12 mm); total length 2.29 mm. Leg IV: trochanter 0.21 mm; femur 1.16 mm; patella 0.39 mm; tibia 0.60 mm; metatarsus 0.55 mm; tarsus (tarsus segments) 0.39 mm (0.20 mm; 0.06 mm; 0.13 mm); total length 3.30 mm.

† MUELLERIZOMUS PALICAUDATUS DE FRANCESCO MAGNUSSEN SP. NOV. (FIGS 32–34) Zoobank registration: urn:lsid:zoobank.org:act: FAEA5DC9-66A7-4500-822C-D37A86820FB3 Type material: Holotype Holotype (Fig. 32A–D), adult homeomorphic ♂, collection no. GPIH04894, ex collection Patrick Müller (no. BUB558). Diagnosis † Muellerizomus palicaudatus differs from other genera by a combination of characters: pedipalps short and delicate; flagellum spatulate and semicircular at the base but narrowed and triangular posteriorly; depression on the dorsal side of the flagellum shaped like a dumbell. Etymology The specific epithet is based on the Latin words pala, shovel, and cauda, tail, referring to the spatulate male flagellum. It is masculine in gender. Description Total length from the anterior process to the base of the flagellum 2.15 mm. C o l o u r (i n a m b e r): O c h r e – g o l d e n; p r o s o m a, opisthosoma, flagellum and pedipalps light brown– golden; legs greenish golden, original colouring equivocal. Prosoma (Fig. 33A, B): Length 0.95 mm; propeltidium length ~ 0.83 mm (owing to the anterior process being missing), width 0.25 mm. Anterior process ripped apart, no setation visible. Propeltidium setation: a single median seta followed by three pairs of setae, left one missing in second pair, only left tubercle visible in third pair. Eye spots present. Mesopeltidia width (left) 0.17 mm, right one not visible owing to an air bubble in the amber. Metapeltidium not divided, length 0.25 mm, width 0.48 mm. No sternum visible owing to air bubbles in the amber. Chelicerae: Setation of the mesal side of chelicerae not visible, except for G6-1. Pedipalps: Short, without armature except for a mesal spur on trochanter (Fig. 33C, D); trochanter setation: ventral five strong setae in bulbous tubercles, three mesal setae in tubercles; femur: longer than trochanter, setation: six dorsal, two dorsomesal, two mesal; patella: shorter than femur, setation: four mesal, four ectal, five dorsomesal, three dorsoectal, three dorsal, two ventral; tibia: shorter than patella, setation: four ventral, one ventroectal, five dorsal, four ectal, four dorsoectal, three mesal; tarsus: with asymmetrical tarsal spurs, spur length 0.02 mm, setation: three ectal, three dorsoectal, three dorsal, four dorsomesal, five mesal, four ventral; claw: long, about two-thirds as long as the length of tarsus. Legs: Left leg I aborted at the trochanter, right leg I well preserved and complete, tarsus with six segments, leg I ~1.58 times as long as the body; anterodorsal margin of femur of leg IV produced at an angle of ~90°, femur of leg IV 3.12 times longer than deep, leg IV 1.19 times longer than the total body length; leg formula: 1423. Opisthosoma: Length 1.2 mm, width 0.49 mm; segments X–XII not elongated, XII with a rounded posterodorsal process pointing upwards at an angle of ~45°. Abdominal tergites setation: I–VIII: Dm; IX: Dl1, Dl2; X: not visible; XI: Dl1; XII: Dm, Dl1; setation pattern: 2:2:2:2:2:2:2:2:4:?:2:4. Flagellum: dorsoventrally flattened, semicircular shape at the base that narrows down towards the posterior end into a triangular shape with a rounded tip, depression on the dorsal side of the flagellum shaped like a dumbbell (Fig. 34A–D), length 0.26 mm, width 0.24 mm; stalk length 0.08 mm; setation: Dm1, Dl2 paired, Dm4, Dl3 paired, Vm1, Vm2 paired, Vm3 paired, Vl1 paired, Vm5, Vl2 paired. Further measurements: Pedipalp: trochanter 0.19 mm; femur 0.29 mm; patella 0.25 mm; tibia 0.17 mm; tarsus 0.15 mm; claw 0.10 mm; total length 1.15 mm. Leg I: trochanter 0.19 mm; femur 0.79 mm; patella 0.99 mm; tibia 0.69 mm; metatarsus 0.28 mm; tarsus (tarsus segments) 0.46 mm (0.05 mm; 0.06 mm; 0.05 mm; 0.06 mm; 0.06 mm; 0.18 mm); total length 3.40 mm. Leg II: trochanter 0.14 mm; femur 0.59 mm; patella 0.29 mm; tibia 0.31 mm; metatarsus 0.30 mm; tarsus (tarsus segments) 0.30 mm (0.09 mm; 0.10 mm; 0.11 mm); total length 1.93 mm. Leg III: trochanter 0.15 mm; femur 0.52 mm; patella 0.19 mm; tibia 0.26 mm; metatarsus 0.32 mm; tarsus (tarsus segments) 0.27 mm (0.11 mm; 0.06 mm; 0.10 mm); total length 1.71 mm. Leg IV: trochanter 0.18 mm; femur 0.78 mm; patella 0.35 mm; tibia 0.52 mm; metatarsus 0.42 mm; tarsus (tarsus segments) 0.30 mm (0.10 mm; 0.08 mm; 0.12 mm); total length 2.55 mm., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 832-833, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082

† CRETACEOZOMUS DE FRANCESCO MAGNUSSEN & S.P. MÜLLER GEN. NOV. (FIGS 6–11) Zoobank registration: urn:lsid:zoobank.org:act: 36AEDFB3-9F9B-4A46-9330-C272B75F352C Type species: † Cretaceozomus robustus De Francesco Magnussen sp. nov. Remarks Specimens of this genus show asymmetrical tarsal spurs (equivocal in † Cretaceozomus angustocaudatus) and also differ from species of Protoschizomidae by lack of the pair of setae at the base of the anterior process and by the presence of a distinct stalk at the male flagellum. They also differ from members of the Megaschizominae by having a smaller body size, lack of eight or nine setae on their anterior process and the presence of only one pair of setae on the tergites II– VII. Therefore, they are clearly members of subfamily Hubbardiinae. The specimens cannot be assigned to any extant genus because of their combination of characters and the particular setation of the male flagellum. Diagnosis † Cretaceozomus differs from all other hubbardiid genera by the following combination of characters: anterior process with two setae next to each other followed by a single median seta (2 + 1), propeltidium with four pairs of setae; corneate eyes present; metapeltidium not divided; body without clavate setae; pedipalp trochanter with a mesal spur; anterodorsal margin of femur of leg IV produced at an angle of ~90°; tergite II with one pair of setae; tergites X–XII not elongated; tergite XII with posterodorsal process (equivocal in † Cretaceozomus angustocaudatus); male flagellum dorsoventrally flattened and without the pair Vl1. Note Although the presence of a posterodorsal process in † Cretaceozomus angustocaudatus cannot be verified, the species can still be discriminated genuinely from any other Recent fauna (see Supporting Information, Table S1). Etymology The genus name stems from the Cretaceous Era, which is the geological period of the formation of Burmese amber, and the suffix -zomus, the last letters of Schizomus. It is masculine in gender. Comparisons † Cretaceozomus is similar to Zomus Reddell & Cokendolpher, 1995, an extant genus widespread in SoutheastAsiaandOceania(Reddell&Cokendolpher,1995; Harvey, 2001b; Manzanilla, 2010). A secure assignment of † Cretaceozomus to the genus Zomus is not possible owing to the fact that males of Zomus are still unknown, and all specimens of † Cretaceozomus are males. Therefore, important diagnostic characters (e.g. spermathecae, male flagellum shape) cannot be compared. Until additional material becomes available, it seems premature to merge the genera Zomus and † Cretaceozomus. † Cretaceozomus is also similar to Ovozomus Harvey, 2001b found from the Comoros to the Cook Islands, but Ovozomus has eye spots, whereas † Cretaceozomus bears corneate eyes. The male flagellum is spade shaped in Ovozomus and bulbous in † Cretaceozomus. Also, the body size range of Ovozomus is larger at 4.00– 5.51 mm compared with 2.86–3.00 mm in † Cretaceozomus. † Cretaceozomus shares characters with † Annazomus, which has three pairs of setae on the propeltidium and lacks eyes (four pairs of setae and eyes present in † Cretaceozomus). In † Annazomus, the male flagellum shape is nearly rectangular with a bulbous elevation, whereas the flagellum of † Cretaceozomus has a semi-oval shape. † Cretaceozomus shares characters with † Muellerizomus, which has three pairs of setae on the propeltidium and eye spots (four pairs and corneate eyes in † Cretaceozomus). Both genera differ also in flagellum shape. † Cretaceozomus shares characters with † Muellerizomus, but the latter has a single median seta followed by three pairs of setae on the propeltidium (four pairs in † Cretaceozomus). † Muellerizomus also lacks eyes and differs in flagellum shape. For comparison with Recent genera, see the Supporting Information (Table S1)., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 801-802, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082, {"references":["Reddell JR, Cokendolpher JC. 1995. Catalogue, bibliography, and generic revision of the order Schizomida (Arachnida). Texas Memorial Museum, Speleological Monographs 4: 1 - 170.","Harvey MS. 2001 b. The Schizomida (Arachnida) of the Seychelle Islands. Invertebrate Systematics 15: 681 - 693.","Manzanilla OV. 2010. The first record of the genus Zomus Reddel & Cokendolpher, 1995 (Schizomida: Hubbardiidae) from Samoa. Arthropoda Selecta 19: 81 - 83."]}

† GROEHNIZOMUS DE FRANCESCO MAGNUSSEN & S.P. MÜLLER GEN. NOV. S.P. MÜLLER GEN. NOV. (FIGS 12–23) Zoobank registration: urn:lsid:zoobank.org:act: 64D36CD9-3AEE-4899-8DFA-5F6BAB6415F7 Type species: † Groehnizomus oculiferans De Francesco Magnussen & S.P. Müller sp. nov. Remarks Specimens of this genus show asymmetrical tarsal spurs and also differ from species of the Protoschizomidae by lack of the pair of setae at the base of the anterior process and the presence of a distinct stalk at the male flagellum. They also differ from members of Megaschizominae by having a smaller body size, lack of eight or nine setae on their anterior process and the presence of only one pair of setae on the tergites II– VII. Therefore, they are clearly members of subfamily Hubbardiinae. The specimens cannot be assigned to any extant genus because of their combination of characters. Diagnosis † Groehnizomus differs from all other hubbardiid genera through a combination of characters: anterior process with one seta followed by a pair of setae; propeltidium with a single seta followed by four pairs of setae (equivocal in † G. oculiferans); corneate eyes present; metapeltidium divided; body without clavate setae; pedipalp trochanter with a mesal spur; anterodorsal margin of femur of leg IV produced at an angle of ~90°; tergite II with one pair of setae; tergites X–XII not elongated; tergite XII with posterodorsal process; male flagellum dorsoventrally flattened. Etymology The genus name is a patronym for Carsten Gröhn, who donated the specimen, combined with the suffix -zomus, which is commonly used for schizomids. It is masculine in gender. Comparisons † Groehnizomus has similarities to Oculozomus Reddell & Cokendolpher, 1995 from Sumatra, but Oculozomus has a larger body size range of 3.5–6.0 mm. Both genera also differ in the shape of the male flagellum (round-bulbous in Oculozomus; subrhomboidal in † Groehnizomus). In Oculozomus, the femur of leg IV is Groehnizomus. There are also similarities to † Mesozomus, but this genus lacks a posterodorsal process, has a single median seta followed by only three pairs of setae on the propeltidium and has an oblong-oval male flagellum. For comparison with Recent genera, see the Supporting Information (Table S1). Note In † G. oculiferans, the setation of the propeltidium is equivocal. Therefore, this character is not included in the comparison., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on page 810, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082, {"references":["Reddell JR, Cokendolpher JC. 1995. Catalogue, bibliography, and generic revision of the order Schizomida (Arachnida). Texas Memorial Museum, Speleological Monographs 4: 1 - 170."]}

† MUELLERIZOMUS DE FRANCESCO MAGNUSSEN & S.P. MÜLLER GEN. NOV. S.P. MÜLLER GEN. NOV. (FIGS 27–34) Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. o r g: act: 1E280AB6-17C2-4F05-A4C4-E021DF9F2722 Type species: † Muellerizomus palicaudatus De Francesco Magnussen sp. nov. Remarks Specimens of this genus show asymmetrical tarsal spurs and also differ from species of Protoschizomidae by the lack of a pair of setae at the base of the anterior process and the presence of a distinct stalk at the male flagellum. They also differ from members of Megaschizominae by having a smaller body size, lack of eight or nine setae on their anterior process and the presence of only one pair of setae on the tergites II -VII. Therefore, they are clearly members of subfamily Hubbardiinae. The specimens cannot be assigned to any extant genus because of their combination of characters. Diagnosis † Muellerizomus differs from all other hubbardiid genera by the following combination of characters: propeltidium with a single median seta followed by three pairs of setae; eye spots present or absent; metapeltidium not divided; body without clavate setae; pedipalp trochanter with a mesal spur (equivocal in † Mu. amandae); anterodorsal margin of femur of leg IV produced at an angle of ~90°; tergite II with one pair of setae; tergites X–XII not elongated; tergite XII with posterodorsal process; male flagellum dorsoventrally flattened; female flagellum with three annuli. Etymology The genus name is a patronym for private collector Patrick Müller, who provided the specimen and numerous others for examination, with the common suffix -zomus, from the last letters of Schizomus. It is masculine in gender. Comparison † M u e l l e r i z o m u s s h a r e s c h a r a c t e r s w i t h † Groehnizomus, but the latter has corneate eyes and a divided metapeltidium (eye spots and metapeltidium not divided in † Muellerizomus). Secozomus Harvey, 2001b from the Seychelles is also similar, but it lacks a posterodorsal process, and the anterodorsal margin of femur IV is angled at> 90°. For comparison with Recent genera, see the Supporting Information (Table S1)., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on page 824, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082, {"references":["Harvey MS. 2001 b. The Schizomida (Arachnida) of the Seychelle Islands. Invertebrate Systematics 15: 681 - 693."]}

† GROEHNIZOMUS OCULIFERANS DE FRANCESCO MAGNUSSEN & S.P. MÜLLER SP. NOV. MAGNUSSEN & S.P. MÜLLER SP. NOV. (FIGS 12–19) Zoobank registration: urn:lsid:zoobank.org:act: 4291F40C-1BA1-4A9C-A668-0E1AA2E65B38 Type material: Holotype (Figs 12A–D, 13A–D), adult homeomorphic ♂, collection no. GPIH05049, ex collection Carsten Gröhn (no. 11266); paratype (Fig. 17A–D), adult heteromorphic ♂, collection no. GPIH05055, ex collection Carsten Gröhn (no. 11210). Diagnosis † Groehnizomus oculiferans can be characterized by the following features: slender pedipalps; flagellum shape flat and subrhomboidal with a rounded tip. Etymology The specific name is derived from Latin oculus, eye and feree, to bear, referring to the presence of eyes in this specimen, which is a rare occurence in Recent schizomids. It is masculine in gender. Description Total length from the anterior process to base of the flagellum 2.56 mm. Colour (in amber): Legs I–III, end of the propeltidium and metapeltidium yellowish brown, nearly transparent; anterior propeltidium, pedipalps, opisthosoma, legs IV and flagellum brownish red, original colouring equivocal. Prosoma: Length 1.13 mm; propeltidium length 0.91 mm, width 0.35 mm; anterior process broad at the base with apical tip, length 0.08 mm; setation: one seta near the tip (visible only from directly above) followed by two setae, one next to the other. Propeltidium setation: only one more single median seta on the propeltidium between the anterior process and the eyes (Fig. 14A, B). No other setae observed owing to taphonomic processes. Corneate eyes present, clearly elevated above the surface of the propeltidium. Mesopeltidia width 0.15 mm. Metapeltidium divided (Fig. 14C, D), length 0.24 mm, width (from outer margin of left plate to outer margin of right plate) 0.52 mm. Anterior sternum with 10 + 2 sternapophysial setae, length 0.36 mm, width 0.24 mm. Posterior sternum with six setae, length 0.14 mm, width 0.15 mm. Pedipalps: Without armature, except for mesal spur on trochater; trochanter produced distally (Fig. 15A–F), setation: six large and strong ventral setae, four ventroectal, two mesal; femur: marginal longer than trochanter, setation: nine dorsal, a single seta, eight in a row, three ventroectal, four ventromesal; patella: nearly as long as the femur, setation: four dorsal, three mesal, two dorsoectal, four ectal, two ventroectal; tibia: shorter than patella, setation: five ventroectal, five ventromesal, four dorsal, five dorsoectal, three dorsomesal; tarsus: with asymmetrical tarsal spurs, spur length: 0.02 mm, setation: + three dorsal, three ventromesal, four dorsomesal, four dorsoectal, three ventroectal, two mesal; claw: bent downwards, about one-third of the length of tarsus. Chelicerae: Setation of the mesal side of chelicerae not visible, except for G6-1. Legs: Left leg I aborted at the trochanter, right one well preserved and complete, tarsus with seven segments, leg I ~1.54 times as long as the body; anterodorsal margin of femur of leg IV produced at an angle of ~90°, femur of leg IV is 3.4 times longer than deep, leg IV 1.18 times longer than the body, leg formula: 1423. Opisthosoma: Length 1.43 mm, width 0.48 mm; tergites X–XII not elongated, tergite XII with a tiny posterodorsal process. Abdominal tergites setation: I: Dm, right one missing; II–VII: Dm; VIII: Dm, Dl1; IX: Dl1, Dl2; X: not visible; XI: Dl1; XII: Dm, Dl1, Dl2; setation pattern: 2:2:2:2:2:2:2:4:4:?:2:6. Flagellum: dorsoventrally flattened, subrhomboidal in shape but with a rounded tip (holotype Fig. 16A–G; paratype Fig. 19A–D), length 0.26 mm, width 0.26 mm; stalk length 0.08 mm; setation: Dm1, Dl2 paired, Dm4, Dl3 paired, Vm1, Vm2 paired, Vm3 paired, Vl1 paired, Vm5, Vl2 paired. Holotype further measurements: Pedipalp: trochanter 0.34mm; femur 0.36 mm; patella 0.37 mm; tibia 0.29 mm; tarsus 0.22 mm; claw 0.07 mm; total length 1.65 mm. Leg I: trochanter 0.18 mm; femur 1.01 mm; patella 1.24 mm; tibia 0.80 mm; metatarsus 0.31 mm; tarsus (tarsus segments) 0.41 mm (0.04 mm; 0.03 mm; 0.04 mm; 0.05 mm; 0.06 mm; 0.06 mm; 0.13 mm); total length 3.95 mm. Leg II: trochanter 0.11 mm; femur 0.69 mm; patella 0.31 mm; tibia 0.39 mm; metatarsus 0.40 mm; tarsus (tarsus segments) 0.30 mm (0.14 mm; 0.07 mm; 0.09 mm); claw 0.05 mm; total length 2.25 mm. Leg III: trochanter 0.15 mm; femur 0.58 mm; patella 0.22 mm; tibia 0.35 mm; metatarsus 0.38 mm; tarsus (tarsus segments) 0.30 mm (0.14 mm; 0.07 mm; 0.09 mm); claw 0.05 mm; total length 2.03 mm. Leg IV: trochanter 0.18 mm; femur 1.06 mm; patella 0.27 mm; tibia 0.61 mm; metatarsus 0.57 mm; tarsus (tarsus segments) 0.39 mm (0.16 mm; 0.08 mm; 0.15 mm); claw 0.07 mm; total length 3.01 mm. Paratype further measurements: Total length from the anterior process to base of the flagellum: 2.56 mm. Prosoma length 1.18 mm; propeltidium length 0.77mm, width 0.35 mm. Pedipalp: trochanter 0.42 mm; femur 0.69 mm; patella 0.85 mm; tibia 0.41 mm; tarsus 0.25 mm; total length 2.62 mm. Leg I: trochanter 0.25 mm; femur> 1.27 mm; patella missing; tibia missing; metatarsus missing; tarsus missing; total length> 1.52 mm. Leg II: trochanter 0.13 mm; femur 0.65 mm; patella 0.38 mm; tibia 0.45 mm; metatarsus 0.31 mm; tarsus 0.34 mm; total length 2.26 mm. Leg III: trochanter 0.15 mm; femur 0.66 mm; patella 0.29 mm; tibia 0.37 mm; metatarsus 0.51 mm; tarsus 0.27 mm; total length 2.25 mm. Leg IV: trochanter 0.25 mm; femur 1.09 mm; patella 0.41 mm; tibia 0.68 mm; metatarsus 0.61 mm; tarsus 0.42 mm; total length 3.46 mm. Leg IV is 1.35 times longer than the body. Opistosoma: length 1.38 mm, width 0.51 mm. Flagellum: length 0.29 mm, width 0.23 mm; stalk length 0.08 mm. Variations: Paratype with heteromorphic pedipalps, nearly as long as the body (Fig. 18A, B), 0.62 times the body length in the holotype; femur of leg IV is 2.75 818 I. DE FRANCESCO MAGNUSSEN ET AL. times longer than deep, 3.4 times longer than deep in the holotype., Published as part of Magnussen, Ilian De Francesco, Müller, Sandro P., Hammel, Jörg U., Kotthoff, Ulrich & Harms, Danilo, 2022, Diversity of schizomids (Arachnida: Schizomida) revealed by new fossil genera and species from mid-Cretaceous Burmese amber with implications for a Gondwanan origin of the Burma Terrane, pp. 792-844 in Zoological Journal of the Linnean Society 196 on pages 810-818, DOI: 10.1093/zoolinnean/zlac034, http://zenodo.org/record/7187082

The homology of three somatic systems in Schizomida is studied yielding the following results: (1) proposal of homology and chaetotaxy of abdominal setae in Surazomus; (2) revision of the cheliceral chaetotaxy in Schizomida, with suggestion of new homology scheme between Hubbardiidae and Protoschizomidae, description of a new group of setae in Hubbardiinae (G7), and division of setae group 5 in two subgroups, G5A and G5B; (3) proposal of segmental homology between trimerous and tetramerous female flagellum in Hubbardiinae with association of segment III of tri-segmented species to segments III + IV of tetra-segmented species. Considerations about the dorsal microsetae on the male flagellum are made. The genus Surazomus in Ecuador is revised. The sympatric species Surazomus palenque sp. nov. and S. kitu sp. nov. (Ecuador, Pichincha) are described and illustrated. The female of S. cuenca (Rowland and Reddell, 1979) is described, with two new distributional records for the species. Surazomus cumbalensis (Kraus, 1957) is recorded for the first time from Ecuador (Pichincha).

(With 1 figure)The schizomids represent a small arachnid order consisting of 273 species (Zhang, 2013). This order is further subdivided in to two families: Protoschizomidae and Hubbardiidae ( Armas, 2010 ). Schizomids are relatively unknown in many parts of the world, especially in tropical countries ( Harvey, 2007 ). Specimens of this order are rare even in scientific collections (Peres et al., 2006 ). In Brazil, most of the described species occur in the northern portion of the country (Santos and Pinto-da-Rocha, 2009).Recent records of the order were prepared for the Northeast of Brazil, in the states of Pernambuco, Paraiba, Bahia, Rio Grande do Norte, and Ceara ( Peres et al., 2006 ; Santos et al., 2008, 2013 ). Four species are known to thrive in this region, three belonging to the genus Rowlandius Reddell and Cokendolpher, 1995 ( Rowlandius linsduarte Santos, Dias, Brescovit and Santos, 2008; Rowlandius