Oecobius przewalskyi Hu & Li, 1987

Hu, Changhao, Liu, Jie & Wang, Kai, 2023, First description of the male of Oecobius przewalskyi Hu & Li, 1987 (Araneae, Oecobiidae) from Shigatse City, Tibet, China, Biodiversity Data Journal 11, pp. 112801-112801 : 112801

Oecobius przewalskyi Hu & Li, 1987

Oecobius przewalskyi Hu & Li, 1987 in Hu and Li (1987): 247, figs. 1.1-3; Song et al. (1999): 77, figs. 31J-K; Hu (2001): 89, figs. 12.1-3.

Materials

Type status: Holotype. Occurrence: occurrenceRemarks: not examined; recordedBy: Aihua Li; individualCount: 1; sex: female; lifeStage: adult; Location : continent: Asia ; country: China; countryCode: China /CN; stateProvince: Tibet; verbatimLocality: Shigatse ; verbatimElevation: 3800 m; Event: year: 1985; month: 7; day: 31 Type status: Paratype. Occurrence: occurrenceRemarks: not examined; recordedBy: Aihua Li; individualCount: 4; sex: 4 females; lifeStage: adult; Location : continent: Asia ; country: China; countryCode: China /CN; stateProvince: Tibet; verbatimLocality: Shigatse ; verbatimElevation: 3800 m; Event: year: 1985; month: 7; day: 31 Type status: Other material. Occurrence: recordedBy: Fengxiang Liu; individualCount: 2; sex: 1 male, 1 female; lifeStage: adult; Location : continent: Asia ; country: China; countryCode: China /CN; stateProvince: Tibet; verbatimLocality: Shigatse , Mountain of Tashilhunpo Monastery ; verbatimElevation: 3836 m; verbatimLatitude: 29.265392°N; verbatimLongitude: 88.871941°E; Event: year: 2002; month: 9; day: 6

Description

Male: Total length 2.18. Carapace 0.80 long, 0.93 wide. Abdomen 1.49 long, 0.95 wide. Diameters of eyes: AME 0.04, ALE 0.06, PME 0.05, PLE 0.06. Interdistances of eyes: AME-AME 0.04, AME-ALE 0.03, PME-PME 0.08, PME-PLE 0.01, AME-PME 0.06, ALE-PLE 0.02. Eyes white with black rings, except PME. Carapace light yellowish-brown with black margin, except clypeal projection, fovea black. Palps, chelicerae, labium and legs pale brown without marks. Measurements of legs: I 2.81 (0.83, 0.25, 0.67, 0.54, 0.52), II 3.00 (0.85, 0.24, 0.72, 0.69, 0.50), III 3.20 (0.92, 0.25, 0.73, 0.77, 0.53), IV 3.30 (0.92, 0.22, 0.76, 0.86, 0.54). Leg formula: IV-III-II-I. Abdomen dorsally yellowish-brown with white irregular marks, cardiac mark light brown. Abdomen ventrally light yellow with few white irregular marks (Fig. 1 D).

Palp as in diagnosis. Embolus (E) short and small, located in the median of bulb in ventral view and bent prolaterally; tegular apophysis (TA) four-branched, upper branch strongly sclerotic, with curled end and an outside tip, median branch small and rounded, two lower branches horn-like; embolic apophysis (EA) point to upward side of bulb and with serrated margin, dorsal embolic apophysis (EA) covered; tegular lobe I (TL I) large and thick, with two apophyses, upper apophysis pointed and lower apophysis rounded (Fig. 1 A-C).

Female: Total length 3.40. Carapace 1.03 long, 1.20 wide. Abdomen 2.57 long, 1.59 wide. Diameters of eyes: AME 0.08, ALE 0.07, PME 0.06, PLE 0.06. Interdistances of eyes: AME-AME 0.10, AME-ALE 0.04, PME-PME 0.10, PME-PLE 0.02, AME-PME 0.01, ALE-PLE 0.02. Measurements of legs: I 4.05 (1.24, 0.28, 0.93, 0.88, 0.72), II 4.44 (1.30, 0.37, 1.04, 1.02, 0.71), III 4.41 (1.28, 0.33, 1.01, 1.10, 0.69), IV 4.58 (1.30, 0.38, 1.09, 1.21, 0.60). Leg formula: IV-II-III-I. Colouration as in male, except cardiac mark dark brown, abdomen ventrally light yellow with white irregular marks (Fig. 1 E).

Copulatory organ as in diagnosis. Epigyne without process and scape. Copulatory openings (CO) located in posterior side; copulatory ducts (CD) visible in ventral view; vulva with wrinkles in posterior side, left copulatory duct (CD) pointing to 1 o'clock; spermathecae (Sp) oval and membranous, located in anterior side (Fig. 2 ).

Diagnosis

Male of Oecobius przewalskyi can be distinguished from other Oecobius species by 1. tegular apophysis (TA) four-branched, upper branch with curled end and an outside tip, median branch small and rounded, two lower branches horn-like; 2. embolic apophysis (EA) with serrated margin; 3. tegular lobe I (TL I) thick, with two apophyses, upper apophysis pointed and lower apophysis rounded (Fig. 1 A-C). Female of O. przewalskyi can be distinguished from the other species of Oecobius by 1. epigyne without process and scape; 2. copulatory ducts (CD) visible in ventral view, left copulatory duct (CD) pointing to 1 o'clock (Fig. 2 ).

Distribution

China (Tibet) (Fig. 3 ).

Notes

Although we did not examine the type specimens of O. przewalskyi , the left copulatory duct (CD) which is pointing to 1 o'clock and the two oval spermathecae (Sp) shown in the original illustrations (Fig. 2 ) leave no doubts that our identification is correct.

Figures

Figure 1. Oecobius przewalskyi Hu & Li, 1987 from Shigatse: A Left male palp, prolateral view; B Same, ventral view; C Same, retrolateral view; D Habitus in dorsal view, male; E Same, female. Abbreviations: E-embolus, EA-embolic apophysis, TA-tegular apophysis, TL I-tegular lobe I. Scale bars: 0.1 mm (A-C), 1 mm (D-E).

Figure 2. Oecobius przewalskyi Hu & Li, 1987 female from Shigatse: A Epigyne, ventral view; B Vulva, dorsal view; C Epigyne from the original paper, ventral view (Hu and Li 1987); D Vulva from the original paper, dorsal view (Hu and Li 1987). Abbreviations: CD-copulatory duct, CO-copulatory opening, Sp-spermatheca. Scale bars: 0.1 mm (A-B).

Figure 3. Collection locality and type locality of Oecobius przewalskyi Hu & Li, 1987 in Tibet, China.