Asiafroneta, a new genus of the spider subfamily Mynogleninae, with two new species from Borneo, East Malaysia (Araneae: Linyphiidae) Author Tanasevitch, Andrei V. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky prospekt 33, Moscow 119071, Russia tanasevitch@gmail.com text Raffles Bulletin of Zoology 2020 2020-03-24 68 56 61 journal article 55743 10.26107/RBZ-2020-0006 573bc19e-c523-4a62-9dc1-795691003c68 2345-7600 4577373 98054AEB-2E9C-4158-96C8-A05BAD42740A Asiafroneta atrata , new species ( Figs. 6–10 , 13–15 , 18–20 ) Holotype . Male ( MHNG ), EAST MALAYSIA , Sabah ( West Coast Residency ), Kinabalu Park , Mt Kinabalu , 2600 m a.s.l. , near Layang Layang, mist forest, sifting very wet moss and dead leaves , 2 May 1987 , coll. D. Burckhardt and I. Löbl [11a]. Paratypes . 5 females ( MHNG ), together with the holotype . Etymology. The specific epithet is a Latin adjective referring to the dark prosoma in the new species. Description. Male holotype . Total length 1.93. Carapace unmodified, 1.03 long, 0.73 wide, dark reddish brown, with an indistinct grey median spot and radial stripes ( Fig. 6 ). Clypeus below each anterior lateral eye with a narrow and elongated groove (sub-ocular sulci), as in Fig. 9 . Chelicerae 0.38 long, anterior margin with one small and two strong teeth, mastidion absent. Legs yellow. Leg I 2.86 long (0.80 + 0.28 + 0.70 + 0.58 + 0.50), IV 2.66 long (0.70 + 0.25 + 0.63 + 0.63 + 0.45). Chaetotaxy: TiI: 2-1-1-0, II: 2-0-1-0, III: 2-0-0-0, IV: 1-0-0-0. Femora and metatarsi unarmed. Length of spines 1–2 diameters of corresponding leg segment. TmI 0.45. Metatarsi IV without trichobothrium. Palp ( Figs. 13–15 ): Patella with a stout spine. Tibia long, subequal in length to cymbium. Cymbium narrow, conical distally, bearing three macrosetae. Paracymbium simple, small, flat, L-shaped. Tegulum with a conical extention distally. Distal suprategular apophysis short and slender. Median membrane very small, poorly visible. Embolus short and narrow, radix small, oblong-oval. Abdomen ( Fig. 6 ) 0.98 long, 0.60 wide, dark grey. Figs. 16–20. Epigyne and vulva structure of Asiafroneta pallida , new species , female paratype from Layang Layang (16, 17) and A. atrata , new species , female paratype (18–20). 16, 18, epigyne, ventral view; 17, 19, 20, vulva, dorsal view, different aspects. Female. Total length 2.10. Carapace unmodified ( Fig. 7 ), 1.03 long, 0.72 wide. Clypeus below each anterior lateral eye with a narrow and elongated groove (sub-ocular sulci), as in Fig. 10 . Chelicerae 0.40 long, anterior margin with one small and two strong teeth, mastidion absent. Legs yellow. Leg I 2.53 long (0.70 + 0.28 + 0.60 + 0.50 + 0.45), IV 2.45 long (0.70 + 0.25 + 0.60 + 0.45 + 0.45). Length of spines 1–2 diameters of corresponding leg segment. TmI 0.46. Metatarsi IV without trichobothrium. Abdomen ( Fig. 7 ) 1.15 long, 0.75 wide, grey to dark grey. Epigyne and vulva ( Figs. 8 , 18–20 ): Epigyne small, anterior wall (= ventral plate, auct.) with a notch, posterior median plate (= dorsal plate, auct.) with a rudimentary parmula (= scapus, auct.), a pit present. Receptacles sub-spherical, median ducts globularly expanded distally, almost in contact. Body colouration and chaetotaxy as in male. Taxonomic remarks. The species is very similar to A. pallida , new species , the only congener so far known (see above), but both sexes of A. atrata , new species , can easily be distinguished from A. pallida , new species , by a dark carapace: dark reddish brown vs. pale greyish brown ( Figs. 6, 7 cf. Figs. 1, 2 ). The male differs by both twice shorter embolus and distal suprategular apophysis. The female genitalia in both species are very similar, but the median ducts in A. atrata , new species , seem to be larger. Distribution. Known only from the type locality in Sabah (East Malaysia ) on Borneo Island.