Acroterius inversus, 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 : 28-31

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.4665115
persistent identifier	https://treatment.plazi.org/id/42879150-7E48-4E0F-8C7B-004DDB375847
taxon LSID	lsid:zoobank.org:act:42879150-7E48-4E0F-8C7B-004DDB375847
treatment provided by	Plazi
scientific name	Acroterius inversus
status	gen. et sp. nov.

Treatment

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

urn:lsid:zoobank.org:act:42879150-7E48-4E0F-8C7B-004DDB375847

Figs 22–23 View Fig View Fig , 38 View Fig

Differential diagnosis

The new species resembles Acroterius camur gen. et sp. nov. ( Fig. 13A–D View Fig ) in having the similar short parmula in epigyne as in A. brevis gen. et sp. nov. and A. longidentatus gen. et sp. nov. ( Fig. 22A–D View Fig ); it can be distinguished by: spermathecae sinuous ( Fig. 22D View Fig ), but hook-shaped in A. camur gen. et sp. nov. ( Fig. 13D View Fig ). Parmula anteriorly rectangular and posteriorly spoon-shaped ( Fig. 22A–C View Fig ), but tongueshaped in A. brevis gen. et sp. nov. ( Fig. 8A–C View Fig ), somewhat triangular in A. camur gen. et sp. nov. ( Fig. 13A–C View Fig ), finger-shaped in A. longidentatus gen. et sp. nov. ( Fig. 29A–C View Fig ).

Etymology

The species name comes from the Latin adjective ‘ inversus ’, meaning ‘inverted’ and referring to the inverted L-shaped spermathecae in the epigyne.

Type material

Holotype CHINA • ♀; Yunnan Province, Lonyang County, Bawan Township, Nankang Yakou ; 24.83178° N, 98.76472° E; alt. 2180 m; 25 May 2005; Charles Griswold leg.; HNU-CGY115 . GoogleMaps

Paratypes (4 ♀♀)

CHINA – Yunnan Province • 2 ♀♀; Lonyang County, Baoshan City, Nankang Yakou (National 320 Road); 24.43717° N, 98.46054° E; alt. 2186 m; 30 Oct. 2003; Guo Tang leg.; HNU-Tang031031 GoogleMaps • 1 ♀; Lushui County, Pianma Township, Chanyan He , 9.3 km to Pianma; 25.99363° N, 98.66651° E; alt. 2470 m; mixed broadleaf deciduous and evergreen forest; 13–14 May 2005; Charles Griswold leg.; HNU-CGY105 GoogleMaps • 1 ♀; Longling County, Longjiang Township, Xiaoheishan Nature Reserve ; 24.82888° N, 98.76001° E; alt. 2020 m; broadleaf forest; 26 May 2005; Charles Griswold leg.; HNU- CGY124 GoogleMaps .

Description

Female (holotype)

MEASUREMENTS AND COLOUR. Total length: 3.33. Carapace 1.10 long, 1.08 wide, cephalic region slightly elevated, yellowish to light brown; fovea, cervical and radial grooves distinct; clypeus 0.26 high ( Fig. 23A–B View Fig ); abdomen 2.22 long, 1.81 wide ( Fig. 23A–B View Fig ). Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.08, PLE 0.07, AME–AME 0.04, PME–PME 0.06, AME–ALE 0.05, PME–PLE 0.11, ALE–ALE 0.44, PLE–PLE 0.48, ALE–PLE contiguous.

CHELICERAE. With six promarginal and six retromarginal teeth.

LENGTH OF LEGS. I = 5.04 (1.41, 1.62, 1.22, 0.79), II = 4.54 (1.37, 1.41, 1.05, 0.71), III = 3.37 (1.12, 0.93, 0.81, 0.51), IV = 4.61 (1.38, 1.42, 1.12, 0.69). Leg formula I–IV–II–III.

EPIGYNE. Posterior median plate extends posteriorly with short parmula with spoon-like deep socket ventrally ( Fig. 22A–B View Fig ); parmula 0.35 long, 0.25 wide at base ( Fig. 22A–B View Fig ); posterior margin of anterior wall of epigynal plate wider than long, with somewhat circle-like projection ( Fig. 22A–B View Fig ); copulatory openings situated inside atrium between anterior wall and posterior median plate ( Fig. 22A–B View Fig ), connected with long, semicircular copulatory ducts joined to spermathecae ( Fig. 22D View Fig ). Spermathecae slender, sinuous, forming almost complete wave ( Fig. 22D View Fig ). Fertilization ducts present laterally on posterior median plate ( Fig. 22D View Fig ).