Acroterius longiprojectus, 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 : 44

Acroterius longiprojectus gen. et sp. nov.

urn:lsid:zoobank.org:act:5E2F3303-07EE-4A75-9FE8-62EC8372BB8C

Figs 34 , 39

Differential diagnosis

The new species resembles Acroterius hamatus gen. et sp. nov. ( Fig. 19A–D ) in having long parmula in epigyne ( Fig. 34B–E ); it can be distinguished by: the posterior projection of the anterior wall of the epigynal plate longer than wide ( Figs 34B–C ), but wider than long in A. hamatus gen. et sp. nov. ( Figs 19A–B , 21A–B ). In ventral view, the distal part of parmula is not expanded ( Fig. 34B–C ), but distinctly expanded in A. hamatus gen. et sp. nov. ( Fig. 19A–B ). The spermathecae are not curved ( Fig. 34E ), but the tip is curved, pointing towards the posterior margin of the epigyne in A. hamatus gen. et sp. nov. ( Figs 19D , 21D ).

Etymology

The species name comes from the Latin adjective ‘ longus ’ + ‘ projectus ’ meaning ‘long’ + ‘projection’, referring to the long posterior projection of the anterior wall of the epigynal plate in the epigyne.

Type material

Holotype CHINA • ♀; Yunnan Province, Fugong County, Lumadeng Township, Yakou of old Shibali; 27.06430° N, 98.75123° E; alt. 3270 m; 13 Aug. 2005; Guo Tang leg.; HNU-Tang–05–06 .

Description

Female (holotype)

MEASUREMENTS AND COLOUR. Total length: 3.15. Carapace 1.33 long, 0.97 wide, cephalic region slightly elevated, brown, dorsally with distinct pattern starting from base of posterior eyes extending to proximal part of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.26 high ( Fig. 34A );Abdomen 1.83 long, 1.48 wide ( Fig. 34A ). Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.06, PLE 0.07 AME–AME 0.04, PME–PME 0.06, AME–ALE 0.07, PME–PLE 0.09, ALE–ALE 0.42, PLE–PLE 0.45, ALE–PLE contiguous.

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

LENGTH OF LEGS. I = 4.66 (1.14, 1.35, 1.2, 0.77), II = 3.78 (0.95, 1.2, 1.11, 0.52), III = 2.45 (0.84, 1.02, 1.11, 0.49), IV = 4.16 (1.17, 1.23, 1.11, 0.65). Leg formula I–IV–II–III.

EPIGYNE. Parmula 0.49 long, 0.27 wide at base ( Fig. 34B–C ); posterior projection of anterior wall of epigynal plate longer than wide on either side ( Fig. 34B–C ). Spermathecae slender, long, almost touches lateral wall of epigyne on each side ( Fig. 34E ).

Male

Unknown.

Distribution

China (Yunnan Province, Fig. 39 ).

Figures

Fig. 34. Acroterius longiprojectus gen. et sp. nov., ♀, holotype (HNU-Tang–05–06). A. Habitus, dorsal view. B–C. Epigyne, ventral view. D. Epigyne, lateral view. E. Vulva, dorsal view.

Fig. 39. Map indicating the type localities of Acroterius circinatus sp. nov. (), A. longidentatus sp. nov. (), A. longimultus sp. nov. (), A. longiprojectus sp. nov. (), A. ovatus sp. nov. () and A. parvus sp. nov. ().

Fig. 19. Acroterius hamatus gen. et sp. nov., ♀, holotype (HNU-Tang–04–04). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view.

Fig. 21. Acroterius hamatus gen. et sp. nov., ♀, paratype (HNU-Tang–04–09). A–B. Epigyne, ventral view. C. Epigyne, lateral view. D. Vulva, dorsal view. E. Habitus, dorsal view. F. Habitus ventral view.