Allotrochosina serpentina Wang & Li, 2024

Wang, Lu-Yu, Li, Shuqiang & Pham, Dinh-Sac, 2024, The wolf spiders of three national parks in Northern Vietnam (Araneae: Lycosidae), Zootaxa 5537 (2), pp. 234-244 : 236-238

Allotrochosina serpentina Wang & Li sp. nov.

Figures 1–2 , 7

Type material. Holotype male (Ar45247). VIETNAM: Vinh Phuc Province, Tam Dao National Park , 21°29.029′N, 105°37.192′E, elev. 794 m. 22 August 2007, Dinh-Sac Pham leg. Paratypes: 5 females (Ar 45248 to Ar 45252), same data as holotype ; 1 male and 7 females (Ar 45253 to Ar 45260), Vinh Phuc Province, Tam Dao National Park , 21°29.055′N, 105°37.420′E, elev. 1063 m. 11 December 2007, Dinh-Sac Pham leg. ; 2 males and 2 females (Ar 45261 to Ar 45264), Vinh Phuc Province, Tam Dao National Park , 21°28.337′N, 105°38.094′E, elev. 1007 m. 12 March 2008, Dinh-Sac Pham leg. ; 2 males (Ar 45265 to Ar 45266), Vinh Phuc Province, Tam Dao National Park , 21°30.516′N, 105°34.263′E, elev. 509 m . 11 April 2007, Dinh-Sac Pham leg.; 1 male and 1 female (Ar 45267 to Ar 45268), Vinh Phuc Province, Tam Dao National Park , 21°30.516′N, 105°34.263′E, elev. 509 m . 14 February 2008, Dinh-Sac Pham leg.; 1 male and 1 female (Ar 45269 to Ar 45270), Vinh Phuc Province, Tam Dao National Park , 21°30.516′N, 105°34.263′E, elev. 509 m . 13 November 2007, Dinh-Sac Pham leg.; 1 male and 3 females (Ar 45271 to Ar 45274), Vinh Phuc Province, Tam Dao National Park , 21°31.501′N, 105°33.434′E, elev. 1060 m. 11 December 2007, Dinh-Sac Pham leg.

Etymology. The specific name is an adjective from the Latin word ‘ serpentinus’, meaning ‘serpentiform’, referring to the shape of the embolus.

Diagnosis: Allotrochosina serpentina Wang & Li sp. nov. resembles A. huangi Wang, Li & Zhang, 2021 ( Wang et al., 2021a: 17, figs 1A–B, 3–5) in having a thick and short median apophysis, membranous conductor, groove-like terminal apophysis, and relatively large, crescent-shaped fertilization ducts, but differs by the terminal apophysis with a triangular end (vs. hook-like in A. huangi ), the thin and serpentiform embolus (vs. crescent-shaped in A. huangi ), the pediform median apophysis (vs. liver-shaped in A. huangi ) ( Figs 1A–B , 2C–G ), the C-shaped spermathecal stalks (vs. V-shaped in A. huangi ), and the large spermathecal heads (vs. small in A. huangi ) ( Figs 1C–D , 2H–I ).

Description. Male holotype ( Fig. 2A ) total length 3.68. Prosoma 2.19 long, 1.53 wide; opisthosoma 1.62 long, 1.11 wide. Carapace grey brown. Eye sizes and interdistances: AME 0.06, ALE 0.07, PME 0.28, PLE 0.20; AME– AME 0.08, AME–ALE 0.10, PME–PME 0.21, PME–PLE 0.19. Clypeus height 0.08. Chelicerae yellow brown, with three promarginal and two retromarginal teeth. Endites and labium yellow brown, longer than wide. Sternum yellow brown, with sparse brown setae. Legs yellow-brown. Leg measurements: I 5.83 (1.56, 1.90, 1.45, 0.92); II 5.29 (1.44, 1.74, 1.34, 0.77); III 5.05 (1.39, 1.59, 1.39, 0.68); IV 7.26 (1.84, 2.34, 2.06, 1.02). Leg formula: 4123. Opisthosoma oval. Dorsum yellow-brown, with black markings. Venter yellow-brown.

Palp ( Figs 1A–B , 2C–G ). Terminal apophysis wide, covered by median apophysis, distal part antidromous, with a sharp end. Median apophysis with a wide base, its anterior part pediform, slightly sclerotized. Embolus thin and serpentiform. Conductor wide, membranous, tapering distally.

Female paratype (Ar45248) ( Fig. 2B ) body features and colour as in the male. Total length 4.42. Prosoma 2.20 long, 1.58 wide; opisthosoma 1.96 long, 1.51 wide. Eye sizes and interdistances: AME 0.08, ALE 0.06, PME 0.26, PLE 0.21; AME–AME 0.06, AME–ALE 0.08, PME–PME 0.20, PME–PLE 0.20. Clypeus height 0.05. Leg measurements: I 6.31 (1.77, 2.20, 1.45, 0.89); II 5.61 (1.54, 1.92, 1.39, 0.76); III 5.09 (1.48, 1.59, 1.32, 0.70); IV 7.70 (2.05, 2.40, 2.29, 0.96). Leg formula: 4123.

Epigyne ( Figs 1C–D , 2H–I ). Spermathecal heads round. Spermathecal stalks C-shaped, wider than spermathecal heads, separated from each other by two times the length of a fertilization duct. Fertilization ducts relatively large, crescent-shaped.

Habitat preferences. All the specimens were collected by leaf-litter sieving, indicating this species mostly lives in leaf litter.

Distribution. Known only from the type locality, Tam Dao National Park, Vinh Phuc Province, Vietnam ( Fig. 7 ).

Figures

FIGURE 1. Allotrochosina serpentina Wang & Li sp. nov. A, B—holotype male; C, D—paratype female (Ar45248); A—left male palp, ventral view; B—same, retrolateral view; C—epigyne, ventral view; D—vulva, dorsal view.

FIGURE 2. Allotrochosina serpentina Wang & Li sp. nov. A, E, F—holotype male; C, D, G—paratype male (Ar45261); B, H, I—paratype female (Ar45248); A—male habitus, dorsal view; B—female habitus, dorsal view; C—left male palp, bulbus, ventral view; D—same, retrolateral view; E—left male palp, ventral view; F—same, retrolateral view; G—embolus and terminal apophysis, ventral view; H—epigyne, ventral view; G— vulva, dorsal view.

FIGURE 7. The location of the three national parks in Vietnam where wolf spiders were collected for this study.