Epeus bicuspidatus ( Song, Gu & Chen, 1988 )

Vu, Duc-Toan, Duong, Van-Tang & Pham, Dinh-Sac, 2025, First records of Epeus bicuspidatus and description of a new species of Epeus (Araneae, Salticidae) from Vietnam, Biodiversity Data Journal 13, pp. e 172899-e 172899 : e172899-

Epeus bicuspidatus ( Song, Gu & Chen, 1988)

Plexippoides bicuspidatus : Song et al. (1988): 71, figs. 6-8 (description of male).

Epeus bicuspidatus ( Song, Gu & Chen, 1988) : Peng et al. (1993): 48, figs. 121-124 (transferred from Plexippoides ); Song et al. (1999): 508, figs. 291 N-O ( ♂).

Materials

Type status: Other material. Occurrence: catalogNumber: TBU-ARA-SAL-002.3 to 002.4 ; individualCount: 2; sex: 1 male, 1 female; lifeStage: adult; occurrenceID: 805D7F94-6204-5C54-A708-9564FA92D6AD; Taxon: scientificName: Epeus bicuspidatus ( Song, Gu & Chen, 1988) ; order: Araneae ; family: Salticidae ; genus: Epeus ; Location: country: Vietnam; countryCode: VN; stateProvince: Son La; locality: Tu Le Commune ; verbatimElevation: 1513 m; verbatimLatitude: 21°45′16″N; verbatimLongitude: 104°14′43″E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 22 May 2024; eventRemarks: collected by Duc-Toan Vu

Type status: Other material. Occurrence: catalogNumber: VNMN-SAL-079 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: 4E813C9D-1B5A-5E63-8FDF-10FF9DADE4BA; Taxon: scientificName: Epeus bicuspidatus ( Song, Gu & Chen, 1988) ; order: Araneae ; family: Salticidae ; genus: Epeus ; Location: country: Vietnam; countryCode: VN; stateProvince: Quang Tri; locality: Dakrong Nature Reserve ; verbatimElevation: 965 m; verbatimLatitude: 16 ° 77 ′ 89 ″ N; verbatimLongitude: 106 ° 84 ′ 95 ″ E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 12 July 2024; eventRemarks: collected by Dinh-Sac Pham

Description

Male: Total length 6.91. Carapace 2.55 long, 2.12 wide. Abdomen 3.44 long, 1.48 wide. Eye sizes and interdistances: AME 0.62, ALE 0.29, PME 0.08, PLE 0.26; distance ALE – PME 0.35, ALE – PLE 0.76. Leg measurements: I 6.16 (1.96, 0.91, 1.60, 1.04, 0.65); II 7.34 (2.24, 0.86, 1.51, 1.74, 0.99); III 7.21 (2.05, 0.93, 1.49, 1.78, 0.96); IV 6.93 (1.86, 0.79, 1.64, 1.82, 0.82).

Female: Total length 6.94. Carapace 2.78 long, 2.01 wide. Abdomen 3.52 long, 1.36 wide. Eye sizes and interdistances: AME 0.69, ALE 0.38, PME 0.14, PLE 0.31; distance ALE – PME 0.35, ALE – PLE 0.81. Leg measurements: I 7.17 (2.22, 1.03, 1.85, 1.26, 0.81); II 6.70 (2.13, 0.93, 1.73, 1.18, 0.73); III 7.42 (2.46, 0.68, 1.75, 1.71, 0.82); IV 6.75 (2.10, 0.71, 1.63, 1.49, 0.82).

Morphological diagnoses of the male specimens are illustrated in Fig. 1 A, B and Fig. 2 , while those of the female specimens are depicted in Fig. 1 C – F. These closely correspond to the descriptions provided by Peng and Li (2002) and Meng et al. (2015).

Figures

Figure 1. Epeus bicuspidatus. A Male, dorsal view; B Male, ventral view; C Female, dorsal view; D Female, ventral view; E Epigyne, ventral view; F Vulva, dorsal view. Scale bars: A – D = 1.0 mm; E – F = 0.1 mm.

Figure 2. Epeus bicuspidatus, left palp habitus. A Ventral view; B Dorsal view; C Retrolateral view; D – E Prolateral views. Scale bars: 0.1 mm.