Acroterius camur 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 camur

description: Acroterius camur gen. et sp. nov.
urn:lsid:zoobank.org:act: B86B9669-F527-44A7-BAF0-40B777161195
Figs 10–14, 38
Differential diagnosis
The new species resembles Acroterius brevis gen. et sp. nov. (Figs 6A–D, 7A–B) in having similar embolus in the male palp and a short parmula in the epigyne (Figs 10A–D, 11A–D, 12A–B) as in A. inversus gen. et sp. nov. and A. longidentatus gen. et sp. nov.; it can be distinguished by the distal arm of paracymbium with three projections and similar embolus, the radical thumb-shaped apophysis extends above the embolus in ventral view (Figs 10D, 12A), but is triangular and reaches to the base of the embolus in A. brevis gen. et sp. nov. (Figs 6D, 7A). Spermathecae hook-shaped, separated by one and half-length of spermathecae (Fig. 13A–B), but L-shaped and present near the posterior median plate in A. brevis gen. et sp. nov. (Fig. 8A–D). Parmula somewhat triangular (Fig. 13A–D), 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), finger-shaped in A. longidentatus gen. et sp. nov. (Fig. 29A–C).
Etymology
The species name comes from the Latin adjective ‘ camur ’, meaning ‘curved’ and referring to the curved distal suprategular apophysis in the male palp.
Type material
Holotype CHINA • 1 ♂; Yunnan Province, Gongshan County, Bingzhongluo Township, Niwaluo He, just below Nujiang Road; 28.02499° N, 98.62564° E; alt. 1610 m; 8 Oct. 2002; D.H. Kavanaugh, P.E. Marek and Hong-bin Liang leg.; HNU-DHK–2002–038.
Paratypes (3 ♂♂, 23 ♀♀)
CHINA – Yunnan Province • 2 ♂♂, 17 ♀♀; same collection data as for holotype; HNU-DHK–2002–038 • 1 ♀; Cikai Township, Dabadi, North bank of Pula river; 27.78333° N, 98.51667° E; alt. 3030 m; 28 Sep. 2002; Heng–mei Yan leg.; HNU-Yan020928 • 1 ♀; Cikai Township, Dabadi to Gongshan, along Pula river downward; 27.7945833° N, 98.5071389° E; alt. 3025–3990 m; 4 Oct. 2002; Heng –mei Yan leg.; HNU-Yan021004 • 1 ♀; Lushui County, Waluoyaku; 25.78333° N, 98.78333° E; alt. 1070 m; 14 Oct. 2002; Heng–mei Yan leg.; HNU-Yan021014 • 2 ♀♀; Tengchong County, Wuhe Township, Tongjia 12-dauzhuang Village, Longchuanjiang River (Longjiang bridge); 24.89284° N, 98.67439° E; alt. 1210 m; 24 May 2005; Heng-mei Yan and Ke-ji Guo leg.; HNU-GKJ020 • 1 ♂; Nujiang Prefecture, Nujiang State Nature Reserve, No. 12 bridge Camp area, 16.3 km W of Gongshan; 27.71503° N, 98.50244° E; alt. 2775 m; 15–19 Jul. 2000; Heng-mei Yan, D.H. Kavanaugh, Charles Griswold, Hongbin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU-00–QD • 1 ♀; Nujiang Prefecture, Nujiang State Nature Reserve, Dulong / Gongshan Yakou area, 21 km W of Gongshan; 27.69655° N, 98.45389° E; alt. 3300–3680 m; 16–17 Jul. 2000; Heng-mei Yan, D.H. Kavanaugh, Charles Griswold, Hong-bin Liang, Darrell Ubick and Da-zhi Dong leg.; HNU-00–BY.
Description
Male (holotype)
MEASUREMENTS AND COLOUR. Total length: 2.95. Carapace 1.41 long, 1.14 wide, cephalothorax brown; clypeus 0.56 high (Fig. 14A–B); abdomen 1.54 long, 1.02 wide (Fig. 14A–B). Eye sizes and interdistances: AME 0.06, ALE 0.07, PME 0.07, PLE 0.07, AME–AME 0.04, PME–PME 0.06, AME– ALE 0.08, PME–PLE 0.07, ALE–ALE 0.42, PLE–PLE 0.46.
CHELICERAE. With five promarginal and five retromarginal teeth (Fig. 14B); proximal two teeth of reteromargin much longer than distal one.
LENGTH OF LEGS. I = 6.11 (1.65, 1.92, 1.59, 0.95), II = 5.43 (1.62, 1.58, 1.38, 0.85), III = 4.13 (1.19, 1.26, 1.05, 0.63), IV = 5.61 (1.58, 1.79, 1.32, 0.92). Leg formula I–IV–II–III.
PALP (Figs 10A–D, 11A–D, 12A–B). Paracymbium highly sclerotized, distal arm with two projections; lateral projection small, somewhat triangular; ventral projection small with blunt end (Figs 10B, 12B); distal suprategular apophysis long, robust, distal part slightly curved with pointed end (Figs 10A–C, 12A–B). Radical apophysis thumb-shaped with blunt end extending above the embolus in ventral view (Figs 10A–D, 11A–D, 12A–B). Embolus stout, short with pointed end (Figs 10A–D, 11A–D, 12A–B).
Female (HNU-DHK–2002–038)
MEASUREMENTS AND COLOUR. Total length: 2.66. Carapace 1.17 long, 1.01 wide, cephalothorax brown; clypeus 0.24 high (Fig. 14C–D); abdomen 1.49 long, 1.21 wide (Fig. 14C–D). Eye sizes and interdistances: AME 0.05, ALE 0.09, PME 0.08, PLE 0.07, AME–AME 0.04, PME–PME 0.06, AME– ALE 0.06, PME–PLE 0.05, ALE–ALE 0.41, PLE–PLE 0.46, ALE–PLE contiguous.
CHELICERAE. With five promarginal and six retromarginal teeth; proximal teeth of reteromargin are much longer than distal one.
LENGTH OF LEGS. I = 4.73 (1.31, 1.54, 1.06, 0.82), II = 4.13 (1.28, 1.23, 1, 0.62), III = 3.45 (0.99, 1.07, 0.91, 0.48), IV = 4.41 (1.29, 1.32, 1.02, 0.78). Leg formula I–IV–II–III.
EPIGYNE. Parmula 0.21 long, 0.41 wide at base (Fig. 13A–B); the posterior margin of anterior wall of epigynal plate with a projection horizontal to anterior wall of epigynal plate margin in orientation (Fig. 13A–B). Spermathecae slender, distal part hook-shaped (Fig. 13D).
Distribution
China (Yunnan Province, Fig. 38).
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 14-18, DOI: 10.5852/ejt.2021.743.1293, http://zenodo.org/record/4664312