Acroterius camur, 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 : 14-18

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 ).

Figures

Fig. 10. Acroterius camur gen. et sp. nov., ♂, holotype (HNU-DHK–2002–038), palp. A. Prolateral view. B. Retrolateral view. C. Dorsal view. D. Ventral view.

Fig. 11. Acroterius camur gen. et sp. nov., ♂, holotype (HNU-DHK–2002–038). A–B. Embolic division, ventral view. C. Embolic division, prolateral view. D. Embolic division, dorsal view.

Fig. 12. Acroterius camur gen. et sp. nov., ♂, holotype (HNU-DHK–2002–038), palp. A. Prolateral view. B. Retrolateral view.

Fig. 13. Acroterius camur gen. et sp. nov., ♀, paratype (HNU-DHK–2002–038). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view.

Fig. 14. Acroterius camur gen. et sp. nov. A–B. ♂, holotype (HNU-DHK–2002–038). C–D. ♀, paratype (HNU-DHK–2002–038). A, C. Habitus, dorsal view. B, D. Habitus, ventral view.

Fig. 38. Map indicating the type localities of Acroterius absentus sp. nov. (), A. brevis sp. nov. (), A. camur sp. nov. (), A. hamatus sp. nov. (), A. inversus sp. nov. () and A. latus sp. nov. ().

Fig. 6. Acroterius brevis gen. et sp. nov., ♂, holotype (HNU-20040501–1), palp. A. Prolateral view. B. Retrolateral view. C. Dorsal view. D. Ventral view.

Fig. 7. Acroterius brevis gen. et sp. nov., ♂, holotype (HNU-20040501–1), palp. A. Prolateral view. B. Retrolateral view.

Fig. 8. Acroterius brevis gen. et sp. nov., ♀, paratype (HNU-20040501–2). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view.

Fig. 22. Acroterius inversus gen. et sp. nov., ♀, holotype (HNU-CGY115). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view.

Fig. 29. Acroterius longidentatus gen. et sp. nov., ♀, holotype (HNU-2002–033A). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view. E. Habitus, dorsal view. F. Habitus, ventral view.