Acroterius absentus, 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 : 5

publication ID	https://doi.org/ 10.5852/ejt.2021.743.1293
publication LSID	lsid:zoobank.org:pub:A56D4F5D-FB1D-45C3-943A-EA64C90A3BAD
DOI	https://doi.org/10.5281/zenodo.4665086
persistent identifier	https://treatment.plazi.org/id/4E49A779-9374-40FB-B842-BEECDAD450A4
taxon LSID	lsid:zoobank.org:act:4E49A779-9374-40FB-B842-BEECDAD450A4
treatment provided by	Plazi
scientific name	Acroterius absentus
status	gen. et sp. nov.

Treatment

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

urn:lsid:zoobank.org:act:4E49A779-9374-40FB-B842-BEECDAD450A4

Figs 1–4 View Fig View Fig View Fig View Fig , 38 View Fig

Differential diagnosis

The new species can be distinguished from all other species of Acroterius gen. nov. by the absence of radical apophysis ( Figs 1A–C View Fig , 3A–B View Fig ).

Etymology

The species name comes from the Latin adjective ‘ absens ’, meaning ‘absent’, referring to the radical apophysis absent in male palp.

Type material

Holotype CHINA • ♂; Yunnan Province, Baoshan City, Nankang Yakou (National 320 Road); 24.43717° N, 98.46054° E; alt. 2186 m, 27 Oct. 2003; Guo Tang leg.; HNU-Tang031027 . GoogleMaps

Description

Male (holotype)

MEASUREMENTS AND COLOUR. Total length: 3.61. Carapace 1.34 long, 1.14 wide, cephalothorax yellowish to light brown; clypeus 0.56 high ( Fig. 4A–B View Fig ); abdomen 2.27 long, 0.89 wide. Eye sizes and interdistances:

AME 0.09, ALE 0.12, PME 0.09, PLE 0.11, AME–AME 0.05, PME–PME 0.08, AME–ALE, 0.12,

PME–PLE 0.11, ALE–ALE 0.54, PLE–PLE 0.61, ALE–PLE contiguous.

CHELICERAE. With five promarginal and five retromarginal teeth, promargin with deep depression and with small teeth except proximal two long; proximal second tooth much longer and almost touching upper margin of fang, distal three teeth small ( Fig. 2A–B View Fig ).

LENGTH OF LEGS. I = 7.48 (1.89, 2.48, 2.03, 1.08), II = 5.9 (1.83, 1.92, 1.32, 0.83), III = 4.11 (1.41, 1.16, 0.97, 0.57), IV = 5.52 (1.72, 1.69, 1.49, 0.62). Leg formula I–II–IV–III.

PALP ( Figs 1A–D View Fig , 3A–B View Fig ). Paracymbium highly sclerotized, distal part with three projections ( Figs 1B View Fig , 3B View Fig ), lateral projection small, triangular; median projection broad, tongue-shaped and ventral projection thumb-like ( Figs 1B View Fig , 3B View Fig ); the distal suprategular apophysis robust with pointed end ( Figs 1A–C View Fig , 3A–B View Fig ); radical apophysis absent ( Figs 1A–C View Fig , 3A–B View Fig ). Embolus originating from distal serrated part of radix, stout, short with pointed end ( Figs 1A–C View Fig , 3A–B View Fig ).