Acroterius latus, 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 : 31-34

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.4665121
persistent identifier	https://treatment.plazi.org/id/896C3469-C7F5-4931-ADBF-B423F6513F4A
taxon LSID	lsid:zoobank.org:act:896C3469-C7F5-4931-ADBF-B423F6513F4A
treatment provided by	Plazi
scientific name	Acroterius latus
status	gen. et sp. nov.

Treatment

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

urn:lsid:zoobank.org:act:896C3469-C7F5-4931-ADBF-B423F6513F4A

Figs 24–28 View Fig View Fig View Fig View Fig View Fig , 38 View Fig

Differential diagnosis

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

Etymology

The species name comes from the Latin adjective ‘ latus ’ meaning ‘broad’, referring to the radical apophysis with a broad distal end in the male palp.

Type material

Holotype CHINA • ♂; Yunnan Province, Lonyang County, Bawan Distr., Nankang Yakou ; 24.83178° N, 98.76472° E; alt. 2180 m; 25 May 2005; Charles Griswold and D.H. Kavanaugh leg.; HNU-CGY123 . GoogleMaps

Paratypes (3 ♀♀)

CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; HNU-CGY123 GoogleMaps • 1 ♀; Fugong County, 2 km down Shibali; 27.16284° N, 98.78989° E; alt. 2420 m; 2 May 2004; Guang–xu Peng leg.; HNU-20040502 GoogleMaps • 1 ♀; Fugong County, Lishadi Township, Shibali ; 27.10520° N, 98.77980° E; alt. 2530 m; 10 Aug. 2005; Guo Tang leg.; HNU-Tang–05–02 GoogleMaps .

Description

Male (holotype)

MEASUREMENTS AND COLOUR. Total length: 3.55. Carapace 1.84 long, 1.47 wide, cephalic region slightly elevated, dark brown, with longitudinal band starting from base of posterior lateral eyes extending to base of cephalothorax followed by fovea, cervical and radial grooves distinct; clypeus 0.34 high ( Fig. 28A–B View Fig ); abdomen 1.71 long, 1.29 wide. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.07, PLE 0.07, AME–AME 0.07, PME–PME 0.09, AME–ALE 0.11, PME–PLE 0.13, ALE–ALE 0.51, PLE–PLE 0.55, ALE–PLE contiguous.

CHELICERAE. With six promarginal and five retromarginal teeth; distal three teeth of promargin very small ( Fig. 25B View Fig ).

LENGTH OF LEGS. I = 6.59 (1.79, 1.99, 1.67, 1.14), II = 4.88 (1.66, 1.69, 1.32, 1), III = 3.95 (1.34, 1.39, 0.76, 0.46), IV=5.98 (1.74, 1.82, 1.46, 0.96). Leg formula I–IV–II–III.

PALP ( Figs 24A–D View Fig , 26A–B View Fig ). Paracymbium highly sclerotized, distal arm with two projections ( Figs 24B View Fig , 26B View Fig ), lateral projection finger-like in ventral view and almost touches posterior margin of paracymbium in retrolateral view; ventral projection thumb-like with blunt end; distal suprategular apophysis slightly protruding above cymbium in ventral view ( Figs 24D View Fig , 26B View Fig ). Radical apophysis relatively large, tongueshaped, slightly curved with blunt end in ventral view ( Figs 24A–D View Fig , 26A–B View Fig ). Embolus stout, short with pointed end ( Figs 24A–C View Fig , 26A–B View Fig ).

Female (HNU-CGY123)

MEASUREMENTS AND COLOUR. Total length: 3.03. Carapace 1.26 long, 1.01 wide, cephalic region slightly elevated, dark brown, with a longitudinal band starting from base of posterior lateral eyes extending to base of cephalothorax; fovea, cervical and radial grooves distinct; clypeus 0.25 high ( Fig. 28C–D View Fig );

abdomen 1.75 long, 1.33 wide. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.07, PLE 0.08, AME–AME 0.05, PME–PME 0.10, AME–ALE 0.08, PME–PLE 0.07, ALE–ALE 0.43, PLE–PLE 0.47, ALE–PLE contiguous.

CHELICERAE. In dorsal view, chelicerae with depression at proximal end slightly below reteromargin with six promarginal and seven retromarginal teeth; reteromarginal teeth gradually decreasing in length towards base of fang ( Fig. 25A–B View Fig ).

LENGTH OF LEGS. I = 4.30 (1.29, 1.48, 0.89, 0.64), II = 4.05 (1.26, 1.34, 0.86, 0.59), III = 2.27 (1.02, 1.06, 0.69, 0.52), IV = 4.39 (1.23, 1.34, 1.03, 0.79). Leg formula I–IV–II–III.

EPIGYNE. Parmula 0.45 long, 0.14 wide at base ( Fig. 27A–B View Fig ); posterior projection of anterior wall of epigynal plate margin of epigyne wider than long, not protruding beyond epigastric furrow ( Fig. 27A– B View Fig ). Spermathecae slender, distal part of spermathecae hook-shaped, slightly curved, pointing towards lateral wall of epigyne ( Fig. 27D View Fig ).

Distribution

China (Yunnan Province, Fig. 38 View Fig ).