Acroterius longimultus, 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 : 39-43

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.4665127
persistent identifier	https://treatment.plazi.org/id/A79B8C4E-1540-4031-A067-7F12809D5B95
taxon LSID	lsid:zoobank.org:act:A79B8C4E-1540-4031-A067-7F12809D5B95
treatment provided by	Plazi
scientific name	Acroterius longimultus
status	gen. et sp. nov.

Treatment

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

urn:lsid:zoobank.org:act:A79B8C4E-1540-4031-A067-7F12809D5B95

Figs 30–33 View Fig View Fig View Fig View Fig , 39 View Fig

Differential diagnosis

The new species resembles Acroterius latus gen. et sp. nov. ( Figs 24A–D View Fig , 26A–B View Fig ) in having the distal arm of the paracymbium with two projections in the male palp and the long parmula with a median incision in the epigyne ( Figs 31A–B View Fig , 32A–D View Fig ); it can be distinguished by: the distal suprategular apophysis long, sword-shaped, protruding beyond the apex of cymbium in retrolateral view ( Figs 30B View Fig , 31B View Fig ), but short, retained below the apex of cymbium in A. latus gen. et sp. nov. ( Figs 24B View Fig , 26B View Fig ). The dorsal projection of the embolic plate almost touches the base of the cymbium in prolateral view ( Figs 30A View Fig , 31A View Fig ), but doesn’t touch the base of the cymbium in A. latus gen. et sp. nov. ( Figs 24A View Fig , 26A View Fig ). The lateral projection of the distal arm of the paracymbium is tongue-shaped, away from the posterior margin of the tibia ( Figs 30B, D View Fig , 31B View Fig ), but finger-shaped, almost touching the posterior margin of the tibia in A. latus gen. et sp. nov. ( Figs 24B, D View Fig , 26B View Fig ). The posterior projection of the anterior wall of the epigynal plate is longer than wide, protruding beyond the epigastric furrow ( Fig.32A–B View Fig ), but wider than long, not protruding beyond the epigastric furrow in A. latus gen. et sp. nov. ( Fig. 27A–B View Fig ). The distal part of spermathecae inverted L-shaped ( Fig. 32D View Fig ), but hook-shaped in A. latus gen. et sp. nov. ( Fig. 27D View Fig ).

Etymology

The species name comes from the Latin adjective ‘ longus ’ + ‘ multus ’, meaning ‘long’ + ‘much’ and referring to the very long distal suprategular apophysis in the male palp.

Type material

Holotype CHINA • ♂; Yunnan Province, Fugong County, Lumadeng Township, Yaping Village , Shibali ; 27.16515° N, 98.77975° E; alt. 2527 m; 1 May 2004; Guang–xu leg.; HNU-20040501–1 . GoogleMaps

Paratypes (1 ♂, 1 ♀)

CHINA • 1 ♂, 1 ♀; same collection data as for holotype; HNU-20040501–2 GoogleMaps .

Description

Male (holotype)

MEASUREMENTS. Total length: 3.18. Carapace 1.53 long, 1.23 wide, cephalic region slightly elevated, brown; fovea, cervical and radial grooves distinct; clypeus 0.21 high ( Fig. 33A–B View Fig ); abdomen 1.65 long, 1.19 wide ( Fig. 33A–B View Fig ). Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.07, PLE 0.09, AME–AME 0.04, PME–PME 0.07, AME–ALE 0.08, PME–PLE 0.08, ALE–ALE 0.44, PLE–PLE 0.51.

CHELICERAE. With five promarginal and five retromarginal teeth; teeth of reteromargin almost equal in length.

LENGTH OF LEGS. I = 5.56 (1.39, 1.61, 1.63, 0.93), II = 4.80 (1.32, 1.43, 1.28, 0.77), III = 3.87 (1.21, 1.08, 1.04, 0.54), IV = 5.45 (1.39, 1.73, 1.61, 0.72). Leg formula I–IV–II–III.

PALP ( Figs 30A–D View Fig , 31A–B View Fig ). Paracymbium highly sclerotized, distal arm with three projections; lateral projection large, curved, beak-shaped with pointed end in retrolateral view; median projection tongueshaped, wider than long; ventral projection sclerotized, tip curved with blunt end, strongly overlapping subtegulum ( Figs 30B View Fig , 31B View Fig ); distal suprategular apophysis much longer than that of all other species in this genus, sword-shaped, protruding above cymbium ( Figs 30A–D View Fig , 31A–B View Fig ). Radical apophysis longer than wide, finger-shaped with broad blunt end, pointing towards distal margin of radix in ventral view ( Figs 30A–D View Fig , 31A–B View Fig ). Dorsal projection of embolic plate with broad, round end, curved and almost touching base of cymbium in prolateral view ( Figs 30A View Fig , 31A View Fig ). Embolus stout, short with pointed end ( Figs 30A–C View Fig , 31A–B View Fig ).

Female (HNU-20040501–02)

MEASUREMENTS. Total length: 2.67. Carapace 1.13 long, 0.91 wide, cephalic region slightly elevated, yellowish brown, with longitudinal band starting from base of posterior lateral eyes extending to middorsal; fovea, cervical and radial grooves distinct; Clypeus 0.24 high ( Fig. 33D–E View Fig ); abdomen 1.54 long, 1.16 wide. Eye sizes and interdistances: AME 0.06, ALE 0.08, PME 0.06, PLE 0.07, AME–AME 0.04, PME–PME 0.05, AME–ALE 0.06, PME–PLE 0.09, ALE–ALE 0.39, PLE–PLE 0.42, ALE–PLE contiguous.

CHELICERAE. With five promarginal and five retromarginal teeth. LENGTH OF LEGS. I = 3.88 (1.19, 1.31, 0.86, 0.52), II = 3.74 (1.15, 1.08, 0.88, 0.63), III = 2.62 (0.8, 0.84, 0.61, 0.37), IV = 3.37 (0.93, 1.03, 0.86, 0.55). Leg formula I–II–IV–III.

EPIGYNE. Lateral margin of parmula wave-like on each side ( Fig. 32A–C View Fig ); parmula 0.45 long, 0.15 wide at base ( Fig. 32A–C View Fig ); posterior projection of anterior wall of epigynal plate longer than wide and protruding beyond epigastric furrow ( Fig. 32A–B View Fig ). Spermathecae slender, inverted L-shaped ( Fig. 32D View Fig ).

Distribution

China (Yunnan Province, Fig. 39 View Fig ).