Sinoderces phathaoensis Li & Li

Bai, Zilong, Li, Fengyuan & Li, Shuqiang, 2019, Ten new species of the spider genus Sinoderces Li & Li, 2017 from China, Laos and Thailand (Araneae, Psilodercidae), ZooKeys 886, pp. 79-111 : 79

publication ID	https://dx.doi.org/10.3897/zookeys.886.39212
publication LSID	lsid:zoobank.org:pub:FF4F3062-D283-4B5D-80C3-AEFC6361CE39
persistent identifier	https://treatment.plazi.org/id/A0255BE4-7363-4F92-BD0F-DCCDB72D4561
taxon LSID	lsid:zoobank.org:act:A0255BE4-7363-4F92-BD0F-DCCDB72D4561
treatment provided by	ZooKeys by Pensoft
scientific name	Sinoderces phathaoensis Li & Li
status	sp. nov.

Treatment

Sinoderces phathaoensis Li & Li View in CoL sp. nov. Figs 5 View Figure 5 , 6 View Figure 6 , 21 View Figure 21 , 22 View Figure 22

Types.

Holotype: ♂, Pha Thao Cave, Vang Vieng District, 11.95 km north of Viengkieo Village, Vientiane Province, Laos, 19°01.749'N, 102°25.954'E, 290 m, 03.XII.2012, Yao Z. leg. Paratypes: 3♀, same data as holotype

Etymology.

The specific name refers to the name of cave; adjective.

Diagnosis.

Sinoderces phathaoensis sp. nov. resembles S. kieoensis sp. nov. in having a similar shaped bulb in males. Males can be distinguished by the curved embolus, almost half as long as the bulb ( Fig. 5B, C View Figure 5 ), in contrast to the straight embolus, less than half the bulb length in S. kieoensis sp. nov. ( Fig. 18 B–D View Figure 18 ). The bulb of S. phathaoensis sp. nov. tapers and narrows more sharply ( Fig. 5 View Figure 5 ) than that of S. kieoensis sp. nov. ( Fig. 18 View Figure 18 ). The male clypeus has two crotched apophyses.

Description.

Male (holotype). Total length 1.84; carapace 0.64 long, 0.70 wide; abdomen 1.20 long, 0.60 wide. Carapace round, light yellow, with brown lateral margins and a trifurcate mark in the center of the carapace ( Fig. 6E View Figure 6 ). Clypeus slanting and darker brown, medially with one pair of bifurcate apophyses. Labium light yellow. Sternum yellow. The opisthosoma darkens anteriorly to posteriorly ( Fig. 6E View Figure 6 ). Cheliceral promargin with one tooth, connected to a lamina, retromargin with one small tooth ( Fig. 21C View Figure 21 ). Leg measurements: I missing, II missing, III missing, IV missing. Abdomen elongated, wrinkles posteriorly; the color darkens towards the posterior end ( Fig. 6E View Figure 6 ). Spinnerets yellow.

Male palp ( Fig. 5 A–D View Figure 5 ): The whole structure is relatively simple. Bulb yellow, conical. Embolus arising distally from the bulb, no conductor. Tibia projected distally. Tibia dark yellow, femur and trochanter light yellow.

Female (one of the paratypes). Size and color similar to male ( Fig. 6 C–E View Figure 6 ). Total length 1.90; carapace 0.64 long, 0.70 wide; abdomen 1.26 long, 0.60 wide. Carapace brown, with brown lateral margins and a trifurcate mark in the center of carapace ( Fig. 6C View Figure 6 ). Clypeus brown. Endites and labium dark brown. Sternum brown. Legs brownish yellow, with dark brown joints. Leg measurements: I missing, II missing, III 5.58 (1.60, 0.20, 1.70, 1.44, 0.64), IV - (2.20, 0.25, -, -, -). Abdomen wrinkled posterodorsally; the color darkens from anterior to posterior. Ventrum with white rings ( Fig. 6E View Figure 6 ). Spinnerets dark yellow.

Epigyne ( Fig. 6A, B View Figure 6 ): The epigyne is wide and extends to the edge of the abdomen ( Fig. 6B View Figure 6 ). Two pairs of curved spermathecae, the anterior pair of spermathecae resemble a germinating seedling, and the other pair is like a twisted hook ( Fig. 6A View Figure 6 ).

Distribution.

Known only from the type locality ( Fig. 22 View Figure 22 ).

Natural history.

Collected in a cave entrance at an elevation of 290 m.