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Hexabdella persiaensis Paktinat-Saeej & Bagheri, 2014 Hexabdella persiaensis Paktinat-Saeej and Bagheri, 2014: 3. Distribution: Iran (Paktinat-Saeej et al. 2014b). Previous provincial records from Iran: Mazandaran (Paktinat-Saeej et al. 2014b). Material examined: Two females from rotten leaves under apple tree, Chetab village, 18 December 2015, Miyaneh city, East Azerbaijan province, Iran were collected by Aylar Rostami., Published as part of Rostami, Aylar, Bagheri, Mohammad, Jamshidi, Soleyman & Paktinat-Saeij, Saeid, 2017, New records of Bdelloidea (Acari: Trombidiformes: Prostigmata) from Iran with a re-description of Spinibdella tadjikistanica Kuznetzov, pp. 245-258 in Persian Journal of Acarology 6 (4) on page 251, DOI: 10.22073/pja.v6i4.30958, http://zenodo.org/record/4644776

Hexabdella quercusi Eghbalian, Khanjani, Safaralizadeh and Ueckermann sp. nov. (Figs. 1���10) Diagnosis. Two pairs of eyes present, fixed cheliceral digit as long as movable digit, chelicerae striated, coxa II with three setae, basifemora II and IV with eight and four setae respectively, genu IV with 5 (+ 1 s) setae, solenidotaxy of tibiae I���IV 3 ��� 2 ��� 1 ���0. Female (n= 4). Total body length (including gnathosoma from apex of hypostome to posterior margin of idiosoma) 602 (608���628), body length (excluding gnathosoma) 446 (455���470); width 270 (230���273). Dorsum (Fig. 1). Prodorsum between setae vi and sci with irregularly broken longitudinal striae; prodorsum with two pairs of eyes, diameters of anterior lateral eye 8 (7���8) and posterior lateral eye 5 (4���5). Striae anterior to internal verticals (vi) broken and transverse; all dorsal setae finely serrate; hysterosomal setae not extending to bases of setae next behind (except seta h 1). Dorsum of hysterosoma with fine, continuous and transverse striae between setae (c 1, d 1, e 1, f 1, h 1 and h 2), but striae obliquely longitudinal between setae c 1���2; seta sce the longest and h 2 and f 2 the shortest; hysterosomal region with three cupules (ia, im and ip) at level of setae d, e and f 1 (Fig. 1). Measurements of dorsal setae as follows: vi 98 (88���93), ve 41 (38���39), sce 69 (65���68), sci 130, c 1 47 (50���51), c 2 50 (40���45), d 1 36 (34���38), e 1 35 (33���38), f 1 41 (35���36), f 2 30 (28���30), h 1 47 (43���45), h 2 30 (27���30). Distance between dorsal setae: vi��� vi 78 (73���75); ve���ve 113 (110���113); vi���ve 33 (30���33); ve���sce 40 (38���40); sci���sci 93 (83��� 87); sce���sci 9 (8���10); sci���c 1 72 (68���69); sci���c 2 102 (103���105); c 1 ���c 1 77 (77���78); c 1 ���c 2 75 (67���70); c 1 ���d 1 60 (58���64); d 1 ���d 1 64 (65���68); d 1 ��� e 1 55 (48���51); e 1 ��� e 1 80 (70���83); e 1 ���f 1 55 (50���54); f 1 ���f 1 48 (43���49); f 1 ���f 2 33 (33���38); h 1 ���h 24 (27���28); h 1 ���h 2 28 (20���27); h 2 ���h 2 80 (70���76). Ratio: vi / ve 2.30 (2.40); vi / sce 0.75 (0.68���0.72); sci / sci���sci 1.39 (1.57 ��� 1.48); vi/vi���vi 0.1. 30 (1.30���1.70), c 1 / c 1 ���c 1 0.61 (0.64���0.65), d 1 / d 1 ���d 1 0.6 (0.50���0.58), e 1 / e 1 ��� e 1 0.44 (0.4���0.54), f 1 / f 1 ���f 1 0.85 (0.73���0.81), h 1 / h 1 ���h 1 1.96 (1.59���1.61), h 2 /h 2 ���h 2 0.34 (0.4���0.43), h 1 /h 2 1.74 (1.43���1.50), c 1 ���c 1: d 1 ���d 1: e 1 ���e 1: f 1 ���f 1: 1.60 (1.60���1.80): 1.33 (1.39���1.51): 1.67 (1.63���1.69): 1.00 (1.00). Gnathosoma (Fig. 4). Subcapitulum 155 (148���165) long, width at base 75 (66���78); base of gnathosoma with transverse striae; palp: five���segmented, tibiotarsus with three setae + one solenidion + two long end setae, DES and VES 83 (83) and 108 (106���108) respectively; genu with four setae; telofemur with one seta; basifemur with five setae; trochanter without setae; measurements of palp segments as follows: trochanter 11 (10���12), basifemur 58 (50���53), telofemur 22 (22���23), genu 12 (13���15), tibiotarsus 35 (35���38). Subcapitulum with six pairs of long ventral subcapitular setae (vh 1���6), distal pair (vh 6) 36 (33���34) about 1.5 x length of proximal pair (vh 1) 21 (19���21); two pairs of short adoral setae near tip of hypostome, avs 10 (11) and ad 9 (8���10). Chelicerae 143 (138���141) long, width 42 (36���38), finely striated and with two dorsal setae (ch 1���2), proximal seta 35 (33���35), and distal seta 50 (46���48), respectively, movable chela with one small tooth and fixed chela smooth and attenuate, equal in length to movable chela; distal seta (ch 1) short, not extending to base of chela (Fig. 4). Venter (Fig. 5). Striae between coxae I���II and III��� IV longitudinal and between coxae II���III finely broken and oblique. One pair of setae between coxae IV. Aggenital region with nine pairs of setae (ag 1���9) by genital valves each with nine pairs of setae (g 1���9) (Fig. 5); anal region surrounded with oblique continuous striae and three pairs of smooth setae (ps 1���3): ps 1 33 (33���38), ps 2 23 (23���25) and ps 3 16 (16���18) long (Fig. 5). Ovipositor (Fig. 6). Ovipositor as indicated in Figure 6; tube like, with 18 smooth setae. Legs (Figs. 7���10). Measurements of legs I-IV: I 255 (238���243), II 231 (215���218), III 272 (250���253), IV 343 (315���338). Setal formulae of leg segments (solenidia in parentheses): coxae I���IV: 5 ��� 3���5 (right leg of holotype with 6)��� 2; trochanters I���IV: 1 ��� 1���2 ��� 1; basifemora I���IV: 8 ��� 8 ��� 7 ��� 4; telofemora I���IV: 5 ��� 5 ��� 5 ��� 5; genua I���IV: 4 ts, 1 s ��� 4 ts, 1 s ��� 4 ts, 1 s ��� 5 ts, 1 s; tibiae I���IV: 6 ts, 3 f, 1 tr��� 7 ts, 1 f, 1 bls��� 7 ts, 1 f ��� 6 ts, 1 tr; tarsi I���IV: 18 ts, 4 w, 1 e ��� 16 ts, 2 w, 1 e ��� 17 ts, 1 tr��� 15 ts, 1 w (Figs. 7���10). Male and immatures: Unknown. Habitat. Litter under oak trees. Distribution. Only known from Western Iran. Remarks. Hexabdella quercusi Eghbalian, Khanjani, Safaralizadeh and Ueckermann sp. nov. is closely related to H. mexicana (Baker & Balock, 1944), redescribed by Atyeo (1960), by having: tibiae I, IV and tarsus III, each with one trichobothrium; opisthosomal setae not branched distally; two pairs of eyes; palp basifemur with five setae; solenidotaxy of tibiae I���IV 3 ��� 2 ��� 1 ���0; it however differs in having: 1) striae between setae vi and sci irregularly broken and longitudinal in the former instead of finely and regularly broken in the latter; 2) fixed digit of equal length as movable digit, instead of two thirds the length of movable digit; 3) genital valve with nine pairs of setae in H. quercusi sp. nov. opposed to eight pairs of setae in H. mexicana; 4) coxa II with three setae in new species while four setae in H. mexicana; 5) subcapitular setae smooth instead of finely serrate; 6) basifemora II and IV with eight and four setae respectively versus seven and five; 7) telofemur IV with five setae instead of four setae; 8) genu IV with 5 (+ 1 ��) setae in H. quercusi whereas 4 (+ 1 ��) in the H. mexicana; 9) tibiae II���IV: 7 ts��� 7 ts��� 6 ts vs. 5 ts��� 5 ts��� 5 ts; 10) tarsi I���IV 18 ts��� 16 ts��� 17 ts��� 15 ts opposed to tarsi I���IV: 14 ts��� 10 ts��� 9 ts��� 8 ts. The new species also resembles H. persiaensis Paktinat Saeej, Bagheri, Saboori & Ueckermann, 2014, in having mostly the same leg chaetotaxy, smooth dorsal idiosomal setae and fixed digit of equal length as the movable digit; however it differs by: 1) palpal basifemur with five setae in the former while six setae in the latter; 2) basifemur III with seven setae in the new species whereas six setae in H. persiaensis; 3) genital valve with nine pairs of setae in H. quercusi sp. nov. while eight pairs of setae in H. persiaensis; 4) aggenital region with nine pairs of setae instead of eight; 5) marginal region between dorsal setae d 1 and e 1 with continuous striae in the former but fine broken striae in the latter; 6) marginal regions between legs II and III with broken striae in new species whereas continuous striae in H. persiaensis; 7) aggenital setae ag 1���5 covered in continuous striae in new species but all aggenital seta, ornamented, on broken striae in H. persiaensis; 8) tarsi I, II and IV with 18, 17 and 15 setae vs 19 (20), 16 and 16 setae. Etymology. The specific epithet is derived from Quercus, due to the oak-dominated forest where the new species was collected. Type material. The holotype and three paratype females were collected from soil and litter under oak trees, Quercus brantii Lindl, (Fagaceae), Baneh, Kurdistan Province, Iran, (35 �� 59 ' N, 46 �� 53 ' E, a.s.l. 1540 m), 17 January 2013, Col. Amir Hossein Eghbalian. Holotype and two paratype females (EHBH 15010 and EPBH 15011 ��� 12, respectively) are deposited in the Mites Collection of the Acarology Laboratory, University of Bu���Ali Sina, Hamedan, Iran, and one paratype female (slide specimen) will be deposited in the Mites Collection of Arachnida, Plant Protection Research Institute, Pretoria, South Africa., Published as part of Eghbalian, Amir Hossein, Khanjani, Mohammad, Safaralizadeh, Mohammad Hassan & Ueckermann, Edward A., 2016, New species of Hexabdella and Neomolgus (Acari: Prostigmata: Bdellidae) from Iran, pp. 291-300 in Zootaxa 4072 (2) on pages 292-295, DOI: 10.11646/zootaxa.4072.2.10, http://zenodo.org/record/260608, {"references":["Baker, E. W. & Balock, J. (1944) Mites of the family Bdellidae. Proceedings of the Entomological Society of Washington, 46 (7), 176 - 184.","Atyeo, W. T. (1960) A revision of the mite family Bdellidae in North and Central America (Acarina, Prostigmata). The University of Kansas Science Bulletin, 40, 345 - 499.","Paktinat Saeej, S., Bagheri, M., Saboori, A. & Ueckermann, E. A. (2014) Hexabdella persiaensis sp. nov. (Acari: Prostigmata: Bdellidae) as a first new species of the genus Hexabdella from Asia. International Journal of Acarology, 40 (5), 384 - 389. http: // dx. doi. org / 10.1080 / 01647954.2014.928366"]}

Genus Hexabdella Van der Schyff et al. 2004 Type species: Hexabdella denheyeri Van der Schyff et al. 2004

Key to adult female Hexabdella of the world (modified from Van der Schyff et al. 2004) and to Neomolgus of Asia (Iran, Japan, Uzbekistan) and the Siberian region of Russia 1. Tibia II without trichobothria, each chelicera with two setae.................. Bdellinae… Hexabdella Van der Schyff … 2 - Tibia II with trichobothria, each chelicera with more than 2 setae........... Odontoscirinae … Neomolgus Oudemans … 11 2. Opisthosomal setae distally branched...................................................................... 3 - Opisthosomal setae smooth or slightly plumose.............................................................. 5 3. Dorsal striae coarsely to sparsely broken; seta ps 1 smooth; coxa IV without macroseta.............................. 4 - Dorsal striae finely broken; seta ps 1 branched; coxa IV with a serrated macroseta.............................................................................................. H. denheyeri Van der Schyff, Theron & Ueckermann 4. Marginal striae of hysterosoma with lobes, visible as dashed lines............... H. cinquaginta Hernandes, Daud & Feres - Marginal striae of hysterosoma smooth............................ H. singula Van der Schyff, Theron & Ueckermann 5. Eyes present......................................................................................... 6 - Eyes absent................................................. H. maraugia Van der Schyff, Theron & Ueckermann 6. Two pairs of eyes present; chelicerae striated............................................................... 7 - One pair of eyes present; chelicerae smooth...................... H. unusoculata Van der Schyff, Theron & Ueckermann 7. Palp basifemur with five or six setae...................................................................... 8 - Palp basifemur with four setae........................................................ H. brevitarsis Hernandes 8. Palp basifemur with five setae........................................................................... 9 - Palp basifemur with six setae.......................... H. persiaensis Paktinat Saeej, Bagheri, Saboori & Ueckermann 9. Solenidotaxy of tibiae I–IV 3 – 2 – 1 –0..................................................................... 10 - Solenidotaxy of tibiae I– IV 1 – 1 – 1 –0............................. H. miranda Van der Schyff, Theron & Ueckermann 10. Coxa II with four setae; basifemura II and IV with seven and fivesetae; genu IV with 4 setae (1 s); fixed digit two thirds the length of movable digit......................................................... H. mexicana (Baker & Balock) - Coxa II with three setae; basifemura II and IV with eight and four setae; genu IV with five setae (1 s); fixed digit as long as movable digit................................ H. quercusi Eghbalian, Khanjani, Safaralizadeh & Ueckermann sp. nov. 11. Palp genu with four setae.............................................................................. 12 - Palp genu with ten setae............................................................ N. longipalpus Kuznetsov 12. Palp tibiotarsus with 8–14 setae......................................................................... 13 - Palp tibiotarsus with more than 20 setae......................................................... N. littoralis (L.) 13. Chelicerae with 7–11 setae............................................................................. 14 - Chelicerae with 21 setae...................... N. iraniensis Eghbalian, Khanjani, Safaralizadeh & Ueckermann sp. nov. 14. Palp basifemur with four setae.......................................................................... 15 - Palp basifemur with five to seven setae................................................................... 16 15. Palp tibiotarsus with eight setae (including end setae); chelicerae with seven setae........... N. raptor Kuznetsov & Barilo - Palp tibiotarsus with nine setae (including end setae); chelicerae with eight setae.................... N. pygmaeus Shiba 16. Prodorsum without distinct dorsal shield.................................................................. 17 - Prodorsum with distinct dorsal shield....................................................... N. clypeatus (Thor) 17. Chelicerae with nine setae; palp basifemur with 5–6 setae........................................... N. pallipes (L.) - Chelicerae with 11 setae; palp basifemur with 7 setae....................................... N. capillatus (Kramer)

Genus Hexabdella Van der Schyff et al. 2004 Type species: Hexabdella denheyeri Van der Schyff et al. 2004, Published as part of Eghbalian, Amir Hossein, Khanjani, Mohammad, Safaralizadeh, Mohammad Hassan & Ueckermann, Edward A., 2016, New species of Hexabdella and Neomolgus (Acari: Prostigmata: Bdellidae) from Iran, pp. 291-300 in Zootaxa 4072 (2) on page 292, DOI: 10.11646/zootaxa.4072.2.10, http://zenodo.org/record/260608

Hexabdella van Der Schyff, Theron & Ueckermann Hexabdella van Der Schyff, Theron & Ueckermann, 2004: 14. Bdella; Baker & Balock, 1944 (part.). Type-species: Hexabdella denheyeri van Der Schyff, Theron & Ueckermann, 2004 by original designation. 55. Hexabdella brevitarsis Hernandes, 2013: 62; Covey Hill, Quebec, Canada. Bdella brevitarsis Banks (in Tothill 1919: 195���196) (nomen nudum). Type deposition. MCZ. 56. Hexabdella cinquaginta Hernandes, Daud & Feres, 2007: 60; Itiquira, Mato Grosso, Brazil, ex Hevea brasiliensis M.Arg. (Euphorbiaceae). Other record: S��o Paulo, Brazil (Demite & Feres 2008). Remarks. Male unknown. Type deposition. DZSJRP. 57. Hexabdella denheyeri van Der Schyff, Theron & Ueckermann, 2004: 15; Angola, ex Eugenia brasiliensis Lam. (Myrtaceae). Type deposition. NCA. 58. Hexabdella maraugia van Der Schyff, Theron & Ueckermann, 2004: 17; Kleinmond, Western Cape Province, South Africa, ex soil under dune vegetation. Remarks. Male unknown. Type deposition. NCA. 59. Hexabdella mexicana (Baker & Balock, 1944): 181; Valle del Bravo, Mexico, ex moss.���van Der Schyff et al., 2004: 13. Original designation: Bdella mexicana Baker & Balock. a. Bdella willisi Baker & Balock, 1944: 182; Drummond, 1957: 142; synonymy according to Atyeo (1960a: 383). Distribution. Mexico (Valle del Bravo, M��xico; Laguna de Zempoala, Morelos; San Luis Potos��, Veracruz), United States (Texas, Kansas, Illinois, Maryland, New York, Connecticut) (Atyeo 1960a) (Wisconsin) (Oatman 1963), Ukraine (Kuznetsov & Livshits 1979a), United States (Lehman 1982), Hawaii (Swift & Goff 1987). Redescriptions. Atyeo (1960a), Swift & Goff (1987), van Der Schyff et al. (2004). Remarks. Atyeo (1960a) set Bdella willisi as a synonym of this species, but mentions that individuals collected from the United States have hysterosomal setae pilose, whereas those of the Mexican specimens are nude. Type deposition. USNM. 60. Hexabdella miranda van Der Schyff, Theron & Ueckermann, 2004: 20; Limpopo Province, South Africa, ex Euphorbia ingens E.Mey (Euphorbiaceae). Remarks. Male unknown. Type deposition. NCA. 61. Hexabdella persiaensis Paktinat-Saeej & Bagheri, 2014: 3; Mazandaran province, Iran, from soil and rotten leaves under Corylus avellana (Betulaceae). Remarks. Male and immatures unknown. Type deposition. Acarological Collection, Department of Plant Protection, University of Maragheh, Iran, and ASI. 62. Hexabdella quercusi Eghbalian, Khanjani, Safaralizadeh & Ueckermann, 2016: 292; ex litter under oak trees, Western Iran. Type deposition. Holotype and paratypes at University of Bu-Ali Sina, Hamedan, Iran; paratype female at NCA. 63. Hexabdella singula van Der Schyff, Theron & Ueckermann, 2004: 14; Cape Town, South Africa, ex Cassine peragua L. (Celastraceae). Remarks. Male and immatures unknown. Type deposition. NCA. 64. Hexabdella unusoculata van Der Schyff, Theron & Ueckermann, 2004: 24; KwaZulu-Natal, South Africa, ex soil. Remarks. Male unknown. Type deposition. NCA., Published as part of Hernandes, Fabio A., Skvarla, Michael J., Fisher, Ray, Dowling, Ashley P. G., Ochoa, Ronald, Ueckermann, Edward A. & Bauchan, Gary R., 2016, Catalogue of snout mites (Acariformes: Bdellidae) of the world, pp. 1-83 in Zootaxa 4152 (1) on pages 18-19, DOI: 10.11646/zootaxa.4152.1.1, http://zenodo.org/record/261900, {"references":["van Der Schyff, J., Theron, P. D. & Ueckermann, E. A. (2004) Hexabdella, a new mite genus of Bdellidae (Acari: Prostigmata) from southern Africa, with descriptions of five new species. African Plant Protection, 10 (1), 13 - 25.","Baker, E. W. & Balock, J. W. (1944) Mites of the family Bdellidae. Proceedings of the Entomological Society of Washington, 46 (7), 176 - 184.","Hernandes, F. A. (2013) Revision of Nathan Banks' type specimens of Bdellidae Duges (Acari: Trombidiformes) of the Museum of Comparative Zoology, Cambridge. International Journal of Acarology, 39 (1), 1 - 9. http: // dx. doi. org / 10.1080 / 01647954.2012.739642","Tothill, J. D. (1919) Some notes on the natural control of the oyster-shell scale (Lepidosaphes ulmi, L.). Bulletin of Entomological Research, 9 (3), 183 - 196. http: // dx. doi. org / 10.1017 / S 0007485300037949","Hernandes, F. A., Daud, R. D. & Feres, R. J. F. (2007) A new species of Hexabdella (Acari: Bdellidae) from Brazil. Zootaxa, 1501, 57 - 63.","Demite, P. R. & Feres, R. J. F. (2008) Influence of cerrado fragments in the distribution of mites in rubber tree crop. Neotropical Entomology, 37 (2), 196 - 204. http: // dx. doi. org / 10.1590 / S 1519 - 566 X 2008000200015","Drummond, R. O. (1957) Observations on the fluctuations of acarine populations from nests of Peromyscus leucopus. Ecological Monographs, 27 (2), 137 - 152. http: // dx. doi. org / 10.2307 / 1948573","Atyeo, W. T. (1960 a) A revision of the family Bdellidae in North and Central America (Acarina: Prostigmata). University of Kansas Science Bulletin, 40, 345 - 499.","Oatman, E. R. (1963) Mite species on apple foliage in Wisconsin. In: Advances in Acarology, Naegele, J. A. (Ed.), vol. 1, Comstock Pub. Assoc., 21 - 24.","Kuznetsov, N. N. & Livshits, I. Z. (1979 a) Predatory mites of the Nikita Botanical Garden (Acariformes: Bdellidae, Cunaxidae, Camerobiidae). Proceedings of the State Nikita Botanical Garden, 79, 51 - 104.","Lehman, R. D. (1982) Mites (Acari) of Pennsylvania conifers. Transactions of the America Entomological Society, 180, 181 - 286.","Swift, S. F. & Goff, M. L. (1987) The family Bdellidae (Acari: Prostigmata) in the Hawaiian Islands. International Journal of Acarology, 13 (1), 29 - 49. http: // dx. doi. org / 10.1080 / 01647958708683478","Paktinat-Saeej, S., Bagheri, M., Saboori, A. & Ueckermann, E. A. (2014) Hexabdella persiaensis sp. nov. (Acari: Prostigmata: Bdellidae) as a first new species of the genus Hexabdella from Asia. International Journal of Acarology, 40, 1 - 6. http: // dx. doi. org / 10.1080 / 01647954.2014.928366","Eghbalian, A. H., Khanjani, M., Safaralizadeh, M. H. & Ueckermann, E. A. (2016) New species of Hexabdella and Neomolgus (Acari: Prostigmata: Bdellidae) from Iran. Zootaxa, 4072 (2), 291 - 300. http: // dx. doi. org / 10.11646 / zootaxa. 4072.2.10"]}

Hexabdella cinquaginta Hernandes, D. Daud & J.F. Feres, 2007: 60 — Holotype female (PEU, n. 6802), Hevea brasiliensis Muell. Arg. (Euphorbiaceae), Itiquira, Mato Grosso, Brazil (17°23'S, 54°45'W)., Published as part of LIU, DONG, YI, TIAN-CI, XU, YUN & ZHANG, ZHI-QIANG, 2013, new mite species described during 2007 to 2012 3663, pp. 1-102 in Zootaxa 3663 (1) on page 37, DOI: 10.11646/zootaxa.3663.1.1, http://zenodo.org/record/5630595

Hexabdella cinquaginta sp.n. Figs 1–13 Body red in life. Female. Dimensions: Body length 759 (649–770), width 352 (297–396), leg lengths: I 275 (275–308), II 231 (242–275), III 319 (275–341), IV 352 (319–374), VES 81.6 (70.3–84.3), DES 106.1 (100.6–108.8), palp segments I–V: 12 (8.2–19), 63 (59.8–76.2), 33 (19–33), 16 (16–19), 49 (43–54.4), vi 76 (76–84), ve 27 (27–38), sci 109 (90–111), sce 30 (27–33), c1 33 (33–38), c2 46 (43–54.4), d1 33 (30–33), e1 35 (33–38), f1 30 (24– 30), f2 30 (34–37), h1 38 (35–41), h2 46 (38–46). Gnathosoma (Figs. 1–3): six pairs of ventral hypostomal setae longitudinally aligned (vh1 – vh6, Fig. 1). Chelicera with longitudinal striae; two setae present, distal seta about twice length of proximal seta; movable chela with two teeth and longer than fixed chela (Fig. 3). Palp chaetotaxy (Fig. 2): trochantera 0, basifemur 6t, telofemur 1t, genu 4t, tibiotarsus 1s, 3t, 2 long end setae (VES, DES). Dorsum: lateral areas of hysterosoma irregularly striated, with rounded lobes on striae, wider than long and spaced (Fig.13), visible as interrupted striae under small magnification (400x) (Figs. 4; 12–13): propodosomal striae longitudinal along midline (Fig. 6); two pairs of eyes posterolateral to ve with longitudinal striae between each pair. Setae ve closer to vi than to sci. Opisthosomal setae and sce setae distally branched, transverse striae between dorsocentral setae; lobed and sparsely broken striae on lateral margins of hysterosoma (Figs. 4, 12; 13). Venter (Fig. 5; 11): eversible ovipositor present; genital valves each with 6–7 setae; seven pairs of agenital setae; setae ps1 – ps3 smooth; one pair of ventral setae between coxae IV. Legs (Figs. 7–10): Leg chaetotaxy: coxae I–IV 5t-4t- 4t, 1 prop- 2t; trochantera I–IV 1t-1t-2t- 1t; basifemora I–IV 6t, 2 reduced-7t- 6t, 1 reduced- 5t; telofemora I–IV 4t, 1 macr.plum.- 4t, 1 macr.plum.- 4t, 1 macr.plum.- 3t, 1 macr.plum.; genua I–IV 1s, 4t-1s, 4t-1s, 4t-1s, 4t; tibiae I–IV 6t, 3s, 1tr- 5t, 2s- 5t, 1s- 6t, 1tr; tarsi I–IV 20t, 4s, 1micr., 2 trichobothrium-like— 14t, 2s, 1micr., 2 trichobothrium-like— 13t, 1tr, 2 trichobothrium-like— 13t, 1micr, 1 trichobothrium-like. Male. Unknown. Differential diagnosis: The new species resembles H. singula Van der Schyff, Theron & Ueckermann, 2004 by the opisthosomal setae being distally branched. It can be distinguished from the latter by its lobed striae on lateral region of opisthosoma, by the distally branched macroseta on telofemur I–II (smooth in H. singula), microseta present proximally on tarsi IV and by having 6 setae on palpal basifemur (rather than 5 in H. singula). Chaetotaxy of trochanter II also differs from that of H. singula. Remarks: The specimens from rubber trees were found at the basis of leaflets, inside a silken cocoon similar to that of Tetrabdella neotropica, whereas all specimens collected from Tibouchina sp. (Melastomataceae) were found wandering on twigs. Etymology: From Latin cinquaginta, meaning fifty, in tribute to the 50 th anniversary of the Instituto de Biociências, Letras e Ciências Exatas (IBILCE/UNESP). Type material: Holotype female (n. 6802), Hevea brasiliensis Muell. Arg. (Euphorbiaceae) 07-III-2005, Itiquira (17°23'S, 54°45'W), Mato Grosso, Brazil; two paratype females with the same data as holotype. Four paratype females, Tibouchina sp. (Melastomataceae), XII-2006, Serra do Japi (23 o 11'S, 46 o 52'W)—Atlantic Forest remnants, São Paulo, Brazil, deposited in DZSJRP.

Hexabdella cinquaginta sp.n. Figs 1–13 Body red in life. Female. Dimensions: Body length 759 (649–770), width 352 (297–396), leg lengths: I 275 (275–308), II 231 (242–275), III 319 (275–341), IV 352 (319–374), VES 81.6 (70.3–84.3), DES 106.1 (100.6–108.8), palp segments I–V: 12 (8.2–19), 63 (59.8–76.2), 33 (19–33), 16 (16–19), 49 (43–54.4), vi 76 (76–84), ve 27 (27–38), sci 109 (90–111), sce 30 (27–33), c1 33 (33–38), c2 46 (43–54.4), d1 33 (30–33), e1 35 (33–38), f1 30 (24– 30), f2 30 (34–37), h1 38 (35–41), h2 46 (38–46). Gnathosoma (Figs. 1–3): six pairs of ventral hypostomal setae longitudinally aligned (vh1 – vh6, Fig. 1). Chelicera with longitudinal striae; two setae present, distal seta about twice length of proximal seta; movable chela with two teeth and longer than fixed chela (Fig. 3). Palp chaetotaxy (Fig. 2): trochantera 0, basifemur 6t, telofemur 1t, genu 4t, tibiotarsus 1s, 3t, 2 long end setae (VES, DES). Dorsum: lateral areas of hysterosoma irregularly striated, with rounded lobes on striae, wider than long and spaced (Fig.13), visible as interrupted striae under small magnification (400x) (Figs. 4; 12–13): propodosomal striae longitudinal along midline (Fig. 6); two pairs of eyes posterolateral to ve with longitudinal striae between each pair. Setae ve closer to vi than to sci. Opisthosomal setae and sce setae distally branched, transverse striae between dorsocentral setae; lobed and sparsely broken striae on lateral margins of hysterosoma (Figs. 4, 12; 13). Venter (Fig. 5; 11): eversible ovipositor present; genital valves each with 6–7 setae; seven pairs of agenital setae; setae ps1 – ps3 smooth; one pair of ventral setae between coxae IV. Legs (Figs. 7–10): Leg chaetotaxy: coxae I–IV 5t-4t- 4t, 1 prop- 2t; trochantera I–IV 1t-1t-2t- 1t; basifemora I–IV 6t, 2 reduced-7t- 6t, 1 reduced- 5t; telofemora I–IV 4t, 1 macr.plum.- 4t, 1 macr.plum.- 4t, 1 macr.plum.- 3t, 1 macr.plum.; genua I–IV 1s, 4t-1s, 4t-1s, 4t-1s, 4t; tibiae I–IV 6t, 3s, 1tr- 5t, 2s- 5t, 1s- 6t, 1tr; tarsi I–IV 20t, 4s, 1micr., 2 trichobothrium-like— 14t, 2s, 1micr., 2 trichobothrium-like— 13t, 1tr, 2 trichobothrium-like— 13t, 1micr, 1 trichobothrium-like. Male. Unknown. Differential diagnosis: The new species resembles H. singula Van der Schyff, Theron & Ueckermann, 2004 by the opisthosomal setae being distally branched. It can be distinguished from the latter by its lobed striae on lateral region of opisthosoma, by the distally branched macroseta on telofemur I–II (smooth in H. singula), microseta present proximally on tarsi IV and by having 6 setae on palpal basifemur (rather than 5 in H. singula). Chaetotaxy of trochanter II also differs from that of H. singula. Remarks: The specimens from rubber trees were found at the basis of leaflets, inside a silken cocoon similar to that of Tetrabdella neotropica, whereas all specimens collected from Tibouchina sp. (Melastomataceae) were found wandering on twigs. Etymology: From Latin cinquaginta, meaning fifty, in tribute to the 50 th anniversary of the Instituto de Biociências, Letras e Ciências Exatas (IBILCE/UNESP). Type material: Holotype female (n. 6802), Hevea brasiliensis Muell. Arg. (Euphorbiaceae) 07-III-2005, Itiquira (17°23'S, 54°45'W), Mato Grosso, Brazil; two paratype females with the same data as holotype. Four paratype females, Tibouchina sp. (Melastomataceae), XII-2006, Serra do Japi (23 o 11'S, 46 o 52'W)—Atlantic Forest remnants, São Paulo, Brazil, deposited in DZSJRP., Published as part of Hernandes, Fábio A., Daud, Rodrigo D. & Feres, Reinaldo J. F., 2007, A new species of Hexabdella (Acari: Bdellidae) from Brazil, pp. 57-63 in Zootaxa 1501 (1) on pages 60-61, DOI: 10.11646/zootaxa.1501.1.4, http://zenodo.org/record/5086939, {"references":["van der Schyff, J., Theron, P. D. & Ueckermann, E. A (2004) Hexabdella, a new mite genus of Bdellidae (Acari: Prostigmata) from southern Africa, with description of five new species. African Plant Protection, 10, 13 - 25."]}