Bowie rotundus, Wang & Irfan & Zhang & Zhang, 2024

Wang, Lu-Yu, Irfan, Muhammad, Zhang, Feng & Zhang, Zhi-Sheng, 2024, On three species of ctenids (Araneae: Ctenidae) from Tibet, China, Zootaxa 5458 (1), pp. 119-129 : 127-128

publication ID	https://doi.org/ 10.11646/zootaxa.5458.1.7
publication LSID	lsid:zoobank.org:pub:6DD2E692-1A2A-4204-93E8-D7040CA213A1
DOI	https://doi.org/10.5281/zenodo.11354168
persistent identifier	https://treatment.plazi.org/id/1F5D87C5-FF85-FFA9-FF0F-FA7632848C42
treatment provided by	Plazi
scientific name	Bowie rotundus
status	sp. nov.

Treatment

Bowie rotundus sp. nov. (圆Ñ伊Ħ)

Figures 5–6 View FIGURE 5 View FIGURE 6 , 7 View FIGURE 7

Type material. Holotype male (SWUC-T-CTe-02-01), China, Tibet, Medog County, 29.3245°N, 95.326967°E, elev. 1116 m, 22 May 2019, L.Y. Wang, P. Liu, T. Yuan and H. Wang leg. GoogleMaps ; Paratypes: 2 males and 2 females (SWUC-T-CTe-02-02~05), Medog County, 29.327161°N, 95.325881°E, elev. 1049 m, 31 May 2022, L.Y. Wang, B. Tan and T.Y. Ren leg. GoogleMaps

Etymology. The specific name comes from the Latin word ‘ rotundus’, which means‘round’ and refers to the tegular apophysis almost round, ball-like.

Diagnosis. Bowie rotundus sp. nov. resembles B. robustus (Thorell, 1897) and B. theodorianum ( Jäger, 2012) from Southwest Asia in having a similar retrolateral tibilal apophysis arising at the same position on the tibia of the male palp; and in the female genitalia with similarly spherical spermathecae and the epigyne with lateral teeth present at its widest part ( Figs 5A–C View FIGURE 5 , 6C–G View FIGURE 6 ; Jäger 2012: figs 66, 93), but can be distinguished by the combination of following characters: cymbium basal lamellar outgrowth somewhat triangular, with sharp, pointed end in ventral view ( Figs 5A View FIGURE 5 , 6D View FIGURE 6 ) vs. thumb shaped, with blunt end both in B. robustus and B. theodorianum ( Jäger 2012: figs 66, 93); tegular apophysis almost round in ventral view ( Figs 5A View FIGURE 5 , 6D View FIGURE 6 ) vs. almost doorknob-shaped in B. robustus ( Jäger 2012: fig. 66) and divided into two parts in B. theodorianum ( Jäger 2012: fig. 93); membrabous extension of embolus like a small outgrowth, semicircular in prolateral and ventral view ( Figs 5A View FIGURE 5 , 6C, D View FIGURE 6 ) vs. sheet-like, extending above the embolus both in B. robustus and B. theodorianum ( Jäger 2012: figs 65, 66, 92, 93). Females of B. rotundus can be distinguished by the combination of following characters: epigyne wider than long ( Figs 5C View FIGURE 5 , 6F View FIGURE 6 ) vs. about as long as wide both in B. robustus and B. theodorianum ( Jäger 2012: figs 69, 73, 96); anterior margin of the median plate bulging upward in ventral view ( Figs 5C View FIGURE 5 , 6F View FIGURE 6 ) vs. not bulging upward in both B. robustus and B. theodorianum ( Jäger 2012: figs 69, 73, 96).

Description. Male holotype ( Fig. 6A View FIGURE 6 ) total length 12.70. Prosoma 6.78 long, 5.22 wide; opisthosoma 5.94 long, 3.82 wide. Carapace with distinct light, brownish median band, fovea marked, brown, lateral bands dark reddishbrown. Eye sizes and interdistances: AME 0.36, ALE 0.24, PME 0.47, PLE 0.32; AME-AME 0.21, AME-ALE 0.38, PME-PME 0.19, PME-PLE 0.41, ALE-PLE 0.19. MOA 0.95 long, front width 0.82, back width 1.10. Clypeus height 0.19. Chelicerae stout, brown, with three promarginal and four retromarginal teeth, without denticles. Endites and labium brown, longer than wide. Sternum dark brown, with sparse brown setae. Legs brown. Patellae I–II without spines; tibia I–II with five pairs of ventral spines; metatarsus I–II with three pairs of ventral spines. Leg measurements: I 20.81 (5.73, 8.22, 5.07, 1.79); II 19.18 (5.52, 7.41, 4.69, 1.56); III 16.67 (4.80, 5.82, 4.36, 1.69); IV 23.34 (6.15, 7.96, 7.16, 2.07). Leg formula: 4123. Opisthosoma oval, dorsum yellowish with four gray chevron stripes. Venter yellowish brown.

Male palp ( Figs 5A–B View FIGURE 5 , 6B–D View FIGURE 6 ). Retrolateral tibial apophysis thumb-shaped in retrolateral view, extending towards the cymbium base with broad, truncate end; cymbium with basal outgrowth like a minute projection with pointed end. Tegular apophysis more or less circular in shape. Conductor membranous, slightly curved, extending prolaterally. Embolus thick, with large membranous extension and with a basal process corresponding to the excavation of subtegulum, embolus with somewhat blunt end.

Female paratype (SWUC-T-CTe-02-02, Fig. 6B View FIGURE 6 ) total length 15.36. Prosoma 8.07 long, 6.01 wide; opisthosoma 7.51 long, 5.20 wide. Eye sizes and interdistances: AME 0.35, ALE 0.29, PME 0.51, PLE 0.45; AME-AME 0.29, AME-ALE 0.50, PME-PME 0.25, PME-PLE 0.49, ALE-PLE 0.24. MOA 1.07 long, front width 0.91, back width 1.25. Clypeus height 0.23. Leg measurements: I 19.38 (5.38, 7.96, 4.38, 1.66); II 17.74 (5.08, 6.90, 4.09, 1.67); III 16.09 (4.83, 5.63, 4.14, 1.49); IV 23.10 (6.08, 8.05, 6.89, 2.08). Leg formula: 4123. Spination and color pattern same as in male.

Genitalia ( Figs 5C–D View FIGURE 5 , 6F–G View FIGURE 6 ). Median plate of epigyne wider than long, lateral teeth situated at widest part. Internal duct system with two large lateral folds running diagonally from medially to laterally, with distinct bend in the middle part. Spermathecae separated by about their diameter from each other; fertilisation ducts pointing medially.

Distribution. Known only from the type locality, Medog, Tibet ( Fig. 7 View FIGURE 7 ).

Habitat. This species is nocturnal in habit and was found in the leaf litter of tropical rainforests.