Acroterius ovatus, Irfan & Bashir & Peng, 2021

Acroterius ovatus View in CoL gen. et sp. nov.

urn:lsid:zoobank.org:act:

Figs 35–36 View Fig View Fig , 39 View Fig

Differential diagnosis

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

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 . GoogleMaps

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 View Fig ); abdomen 1.99 long, 1.49 wide ( Fig. 35A–B View Fig ). 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 View Fig ); parmula 0.57 long, 0.18 wide at base ( Fig. 35A–B View Fig ); anterior wall of epigynal plate margin oval ( Fig. 36A–B View Fig ); posterior projection of anterior wall of epigynal plate somewhat circular on each side ( Fig. 36A–B View Fig ). Spermathecae slender, hook-shaped pointing towards lateral margin of epigyne ( Fig. 36D View Fig ).

Male

Unknown.

Distribution

China ( Yunnan Province, Fig. 39 View Fig ).