Acroterius longidentatus, Irfan & Bashir & Peng, 2021

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

urn:lsid:zoobank.org:act:

Figs 29 View Fig , 39 View Fig

Differential diagnosis

The new species resembles Acroterius brevis gen. et sp. nov. ( Fig. 8A–D View Fig ) in having a similar short parmula as in A. camur gen. et sp. nov. and A. longidentatus gen. et sp. nov. and the C-shaped distal part of spermathecae in epigyne ( Fig. 29A–D View Fig ); it can be distinguished by: the posterior projection of the anterior wall of the epigynal plate C-shaped in ventral view, somewhat triangular in lateral view and retained below the lateral margin of anterior wall of the epigyne in the new species ( Fig. 29A–C View Fig ), but beak-shaped in ventral view, protruding above the lateral margin in A. brevis gen. et sp. nov. ( Fig. 8A–C View Fig ). The spermathecae are situated near the median septum ( Fig. 29D View Fig ), but situated away from the median septum in A. brevis gen. et sp. nov. ( Fig. 8D View Fig ). Parmula finger-shaped ( Fig. 29A–C View Fig ), but tongue-shaped in A. brevis gen. et sp. nov. ( Fig. 8A–C View Fig ), anteriorly rectangular and posteriorly spoon-shaped in A. inversus gen. et sp. nov. ( Fig. 22A–C View Fig ) and somewhat triangular in A. camur gen. et sp. nov. ( Fig. 13A–C View Fig ).

Etymology

The species name comes from the Latin adjective ‘ longus ’ + ‘ dentatus ’, meaning ‘long’ + ‘teeth’ and referring to the long and highly sclerotized teeth on the retrolateral margin of the chelicerae in the female.

Type material

Holotype CHINA • ♀; Yunnan Province, Longling County, Longjiang Township, Xiaoheishan Nature Reserve ; 24.82888° N, 98.76001° E; alt. 2020 m; broadleaf forest; 28 May 2005; Charles Griswold and D.H. Kavanaugh leg.; HNU-2002–033A . GoogleMaps

Paratypes ( 5 ♀♀)

CHINA – Yunnan Province • 4 ♀♀; same collection data as for holotype; HNU-2002–033A GoogleMaps • 1 ♀; Longling County, Longjiang Township, Xiaoheishan Nature Reserve ; 24.83671° N, 98.76185° E; alt. 2067 m; hand collecting; 28 May 2005; Heng-mei Yan and Guo Ke-ji leg.; HNU-GKJ029 GoogleMaps .

Description

Female ( holotype)

MEASUREMENTS AND COLOUR. Total length: 3.73. Carapace 1.27 long, 1.18 wide, cephalic region slightly elevated, yellowish brown, with distinct pattern starting from the base of posterior median eyes; fovea, cervical and radial grooves distinct; clypeus 0.27 high ( Fig. 29E–F View Fig ); abdomen 2.47 long, 1.81 wide. Eye sizes and interdistances: AME 0.07, ALE 0.11, PME 0.08, PLE 0.08, AME–AME 0.05, PME–PME 0.08, AME–ALE 0.11, PME–PLE 0.09, ALE–ALE 0.51, PLE–PLE 0.55, ALE–PLE contiguous.

CHELICERAE. With six promarginal and six retromarginal teeth; reteromarginal teeth long and highly sclerotized.

LENGTH OF LEGS. I = 6.13 (1.67, 1.95, 1.55, 0.96), II = 5.50 (1.45, 1.75, 1.51, 0.79), III = 3.50 (0.98, 1.07, 0.91, 0.54), IV = 5.02 (1.23, 1.61, 1.36, 0.82). Leg formula I–II–IV–III.

EPIGYNE. Parmula 0.36 long, 0.23 wide at base ( Fig. 29B View Fig ); the posterior projection of anterior wall of epigynal plate circular in ventral view; somewhat triangular and retained below lateral wall of epigynal plate in lateral view ( Fig. 29A–C View Fig ). Spermathecae slender, distal part C-shaped and situated near median septum ( Fig. 29D View Fig ).

Male

Unknown.

Distribution

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