Acroterius ovatus, Irfan & Bashir & Peng, 2021

Irfan, Muhammad, Bashir, Shahida & Peng, Xianjin, 2021, Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China, European Journal of Taxonomy 743, pp. 1-53 : 45-48

Acroterius ovatus gen. et sp. nov.

urn:lsid:zoobank.org:act:33E64A5A-FD47-48ED-B075-B721D9EDE3A3

Figs 35–36 , 39

Differential diagnosis

The new species resembles Acroterius longidentatus gen. et sp. nov. ( Fig. 29A–C ) in having a similar circular posterior projection of the anterior wall of the epigynal plate in the epigyne ( Fig. 36A–C ); it can be distinguished by the anterior wall of the oval epigynal plate margin ( Fig. 36A–B ), but semicircular in A. longidentatus gen. et sp. nov. ( Fig. 29A–B ). In dorsal view, parmula with wave-like margin and almost four times as long as median septum ( Fig. 36D ), but tongue-shaped and as long as median septum in A. longidentatus gen. et sp. nov. ( Fig. 29D ). The spermathecae are hook-shaped ( Fig. 36D ), but C-shaped in A. longidentatus gen. et sp. nov. ( Fig. 29D ).

Etymology

The species name comes from the Latin adjective ‘ ovatus ’, meaning ‘oval’ and referring to the oval anterior wall of the epigynal plate margin of the epigyne.

Type material

Holotype CHINA • ♀; Yunnan Province, Tengchong County, Mingguang Township, Zizhi Village ; 25.79808° N, 98.62406° E; alt. 2756 m; 19 May 2006; Chang-min Yin, Jia-fang Hu and Ming-wei Yang leg.; HNU-YHY06 .

Description

Female (holotype)

MEASUREMENTS AND COLOUR. Total length: 3. Carapace 1.01 long, 0.96 wide, cephalic region slightly elevated, dark brown, dorsally with distinct pattern starting from base of posterior eyes extending to proximal part of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.23 high ( Fig. 35A– B ); abdomen 1.99 long, 1.49 wide ( Fig. 35A–B ). Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.07, AME–AME 0.04, PME–PME 0.06, AME–ALE 0.09, PME–PLE 0.07, ALE–ALE 0.45, PLE–PLE 0.48, ALE–PLE 0.02.

CHELICERAE. With five promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized, protruding beyond fangs.

LENGTH OF LEGS. I = 4.34 (1.19, 1.35, 1.07, 0.73), II = 4.03 (1.14, 1.28, 0.89, 0.72), III = 2.76 (0.94, 0.72, 0.65, 0.45), IV = 3.56 (1.15, 1.08, 0.74, 0.59). Leg formula I–II–IV–III.

EPIGYNE. Lateral margin of parmula wave-like ( Fig. 36A–B ); parmula 0.57 long, 0.18 wide at base ( Fig. 35A–B ); anterior wall of epigynal plate margin oval ( Fig. 36A–B ); posterior projection of anterior wall of epigynal plate somewhat circular on each side ( Fig. 36A–B ). Spermathecae slender, hook-shaped pointing towards lateral margin of epigyne ( Fig. 36D ).

Male

Unknown.

Distribution

China (Yunnan Province, Fig. 39 ).

Figures

Fig. 35. Acroterius ovatus gen. et sp. nov., ♀, holotype (HNU-YHY06). A. Habitus, dorsal view. B. Habitus, ventral view.

Fig. 36. Acroterius ovatus gen. et sp. nov., ♀, holotype (HNU-YHY06). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view.

Fig. 39. Map indicating the type localities of Acroterius circinatus sp. nov. (), A. longidentatus sp. nov. (), A. longimultus sp. nov. (), A. longiprojectus sp. nov. (), A. ovatus sp. nov. () and A. parvus sp. nov. ().

Fig. 29. Acroterius longidentatus gen. et sp. nov., ♀, holotype (HNU-2002–033A). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view. E. Habitus, dorsal view. F. Habitus, ventral view.