Acroterius longidentatus Irfan & Bashir & Peng 2021, gen. et sp. nov.
Creators: name: Irfan, Muhammad
name: Bashir, Shahida
name: Peng, Xianjin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Acroterius
Acroterius longidentatus

description: Acroterius longidentatus gen. et sp. nov.
urn:lsid:zoobank.org:act: F372CAB7-6C3F-403D-809D-4FDA72FB7B10
Figs 29, 39
Differential diagnosis
The new species resembles Acroterius brevis gen. et sp. nov. (Fig. 8A–D) 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); 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), but beak-shaped in ventral view, protruding above the lateral margin in A. brevis gen. et sp. nov. (Fig. 8A–C). The spermathecae are situated near the median septum (Fig. 29D), but situated away from the median septum in A. brevis gen. et sp. nov. (Fig. 8D). Parmula finger-shaped (Fig. 29A–C), but tongue-shaped in A. brevis gen. et sp. nov. (Fig. 8A–C), anteriorly rectangular and posteriorly spoon-shaped in A. inversus gen. et sp. nov. (Fig. 22A–C) and somewhat triangular in A. camur gen. et sp. nov. (Fig. 13A–C).
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.
Paratypes (5 ♀♀)
CHINA – Yunnan Province • 4 ♀♀; same collection data as for holotype; HNU-2002–033A • 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.
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); 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); 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). Spermathecae slender, distal part C-shaped and situated near median septum (Fig. 29D).
Male
Unknown.
Distribution
China (Yunnan Province, Fig. 39).
description: Published as part of Irfan, Muhammad, Bashir, Shahida & Peng, Xianjin, 2021, Acroterius gen. nov. (Araneae: Linyphiidae: Linyphiinae) with twelve new species from Yunnan, China, pp. 1-53 in European Journal of Taxonomy 743 on pages 37-39, DOI: 10.5852/ejt.2021.743.1293, http://zenodo.org/record/4664312