Aetius bicuspidatus Yamasaki, 2020

Zhang, Lu, Mu, Yannan & Zhang, Feng, 2022, First record of the genus Aetius O. Pickard-Cambridge, 1897 from China, with description of a new species (Araneae, Corinnidae, Castianeirinae), Biodiversity Data Journal 10, pp. 96594-96594 : 96594

publication ID	https://dx.doi.org/10.3897/BDJ.10.e96594
publication LSID	lsid:zoobank.org:pub:49EFB500-DFCC-4F80-9060-B0751DEF6918
persistent identifier	https://treatment.plazi.org/id/9380E06A-6B94-549A-9E1F-B643F6F2D4CE
treatment provided by	Biodiversity Data Journal by Pensoft
scientific name	Aetius bicuspidatus Yamasaki, 2020
status

Treatment

Materials

Type status: Other material. Occurrence: recordedBy: Mengjiao Xu; individualCount: 2; sex: male; lifeStage: adult; occurrenceID: A982BFC5-A5A8-5D37-807E-635928FAA504; Location : country: China; stateProvince: Yunnan Province; county: Jinghong ; locality: Wild Elephant Valley ; verbatimElevation: 814; verbatimLatitude: 22°10′25.05″N; verbatimLongitude: 100°51′19.07″E; Event : year: 2022; month: 6; day: 5; Record Level : institutionID: the Museum of Hebei University ; institutionCode: MBHU GoogleMaps GoogleMaps

Diagnosis

Aetius bicuspidatus can be distinguished from all Aetius species by: 1) the bicuspid posterior projection on the carapace; 2) the long pedicel (Fig. 4 View Figure 4 ). Males can be further distinguished from those of A. maculatus sp. n. by: 1) the triangular PTA (vs. rounder in A. maculatus sp. n.); 2) the thick embolus, with blunt top (vs. slender embolus, with sharp top in A. maculatus sp. n.) (compare Fig. 5 View Figure 5 with Fig. 3 View Figure 3 A-D). Females can be further distinguished from those of A. nocturnus by the long and thin copulatory duct (compare fig. 2D in Yamasaki et al. 2020 with Fig. 8 View Figure 8 F).

Redescription

Male (Fig. 4 View Figure 4 ). Total length 4.70; carapace 3.05 long, 1.65 wide; abdomen 2.82 long, 1.46 wide. Eye sizes and interdistances: AME 1.23, ALE 0.67, PME 0.80, PLE 0.70; AME-AME 0.27, AME-ALE 0.17, ALE-ALE 0.56, PME-PME 0.32, PME-PLE 0.47, PLE-PLE 0.98, ALE-PLE 0.49; MOA 0.17 long; anterior width 0.37, posterior width 0.42. Clypeal height 0.22. Chelicerae with two pro- (proximal smallest, distal largest) and two retromarginal teeth (same size). Labium 0.12 long, 0.36 wide; sternum 0.95 long, 0.80 wide. Measurements of legs: I 3.93 (1.15, 0.46, 0.87, 0.77, 0.68), II 3.97 (1.21, 0.45, 0.87, 0.78, 0.66), III 3.90 (1.21, 0.42, 0.90, 0.76, 0.61), IV 5.25 (1.50, 0.54, 1.24, 1.26, 0.71).

Carapace black, sub-pentagonal; carapace narrowed posteriorly, forming bicuspid; pedicel elongated (Fig. 4 View Figure 4 A). Legs Ⅰ-Ⅲ yellow, middle of femora black; Leg Ⅳ brown, distal femora, patellae and middle of metatarsi yellow. Abdomen black, oval, with medial constriction dorsally. Dorsal scutum large, nearly covered abdomen (Fig. 4 View Figure 4 B).

Palp (Fig. 5 View Figure 5 ). Tibia concaved in ventral surface; retrolateral tibial apophysis digitiform, weakly sclerotised, slightly transparent; prolateral tibial apophysis triangular. Embolus conical, thick, with blunt top.

Distribution

Malaysia (Borneo), China (Yunnan Province) (Fig. 10 View Figure 10 ).