Sinoctenus zhui Marusik, Zhang & Omelko, 2012

Lu, Ying, Chu, Chang, Yao, Zhiyuan & Li, Shuqiang, 2022, Four new species of ctenid spiders (Araneae, Ctenidae) from Southeast Asia, with the first description of the female of Sinoctenus zhui Marusik, Zhang & Omelko, 2012, Biodiversity Data Journal 10, pp. 91350-91350 : 91350

Sinoctenus zhui Marusik, Zhang & Omelko, 2012

Materials

Type status: Other material. Occurrence: recordedBy: Yuanye Zhou ; individualCount: 1; sex: male; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Sinoctenus ; Location : country: China; stateProvince: Hainan; locality: Lingshui County ; verbatimLocality: Diaoluoshan National Forest Park Resort ; verbatimElevation: 920 m a.s.l.; verbatimLatitude: 18°43.505'N; verbatimLongitude: 108°52.104'E; Event: year: 2011; month: 4; day: 20; Record Level: institutionCode: IZCAS-Ar 43485 Type status: Other material. Occurrence: recordedBy: Yuanye Zhou ; individualCount: 1; sex: male; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Sinoctenus ; Location : country: China; stateProvince: Hainan; locality: Ledong County ; verbatimLocality: Jianfengling Town , Jianfengling Ecological Protection Station ; verbatimElevation: 820 m a.s.l.; verbatimLatitude: 18°44.415'N; verbatimLongitude: 108°51.802'E; Event: year: 2011; month: 5; day: 17; Record Level: institutionCode: IZCAS-Ar 43486 Type status: Other material. Occurrence: recordedBy: Yuanye Zhou ; individualCount: 1; sex: female; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Sinoctenus ; Location : country: China; stateProvince: Hainan; locality: Lingshui County ; verbatimLocality: Diaoluoshan National Forest Park Resort ; verbatimElevation: 920 m a.s.l.; verbatimLatitude: 18°43.505'N; verbatimLongitude: 108°52.104'E; Event: year: 2011; month: 4; day: 22; Record Level: institutionCode: IZCAS-Ar 43487 Type status: Other material. Occurrence: recordedBy: Yuanye Zhou ; individualCount: 1; sex: female; lifeStage: adult; Taxon : order: Araneae ; family: Ctenidae ; genus: Sinoctenus ; Location : country: China; stateProvince: Hainan; locality: Lingshui County ; verbatimLocality: Diaoluoshan National Forest Park Resort ; verbatimElevation: 920 m a.s.l.; verbatimLatitude: 18°43.505'N; verbatimLongitude: 108°52.104'E; Event: year: 2011; month: 4; day: 20; Record Level: institutionCode: IZCAS-Ar 43488

Description

Male: See Marusik et al. (2012).

Female (IZCAS-Ar 43487): PL 6.2, PW 4.8, AW 3.0, OL 6.4, OW 4.2. Eye diameters and interdistances: AME 0.20, ALE 0.21, PME 0.29, PLE 0.25, AME-AME 0.24, AME-ALE 0.49, PME-PME 0.36, PME-PLE 0.59, AME-PME 0.18, ALE-PLE 0.28, clypeus AME 0.10, clypeus ALE 0.49. Palp and leg measurements: palp 6.2 (2.1, 1.2, 1.5, -, 1.4), I 14.8 (4.3, 2.3, 3.8, 3.3, 1.1), II 12.5 (3.7, 2.4, 2.2, 3.1, 1.1), III 11.8 (3.6, 1.8, 2.4, 2.9, 1.1), IV 17.2 (4.7, 2.0, 3.9, 5.1, 1.5). Leg formula 4123. Spination of palp and legs: palp 131, 100, 1310, 2120; femora I p021, d111, r111, II p112, d111, r111, III p011, d111, r1111, IV p001, d111, r1111; patellae I-II 000, III-IV 101; tibiae I-II v22222, III p11, d11, r11, v222, IV p11, d111, r11, v222; metatarsi I-II v222, III p111, d012, r111, v222, IV p111, d011, r111, v222. Chelicerae with 3 promarginal, 4 retromarginal teeth, without denticle. Retromargin of chelicerae close to fang base with 5 bristles. Sparse scopula restricted almost entirely to tarsi, only metatarsi I-II with sparse scopula hairs. Palpal claw with 7 secondary teeth, leg claws I, IV with 4, II with 2, III with 3 secondary teeth. Position of tarsal organ: I 0.89, II 0.84, III 0.71, IV 0.91.

Copulatory organ (Fig. 7 a and b). Epigynal field laterally with two separate long nearly trapezoidal patches and with two slit sense organs anterior to epigynal plate. The anterior of median plate is longer than posterior, epigynal teeth pointed and long, situated posteriorly. Internal duct system with two small lateral folds. Spermathecae separated by more than their diameter, fertilisation ducts elongately laminar and pointing anteriorly.

Colour (Fig. 9 d). Reddish-brown with darker patterns. Dorsal prosoma with characteristic distinct deeper median band, widened behind eyes and with distinctly marked fovea and lateral bands dark reddish-brown. Sternum and ventral coxae dark yellowish-brown without pattern, gnathocoxae and labium deep reddish-brown with distal part lighter, gnathocoxae with slightly light lip. Chelicerae dark reddish-brown. Palps and legs yellowish-brown. Dorsal and lateral opisthosoma yellowish-brown, mottled with black spots. Ventral opisthosoma with triangular yellowish-brown area, median field with darker patches, lateral field brown with black patches. Spinnerets light and anal tubercle light.

Variation: Males (IZCAS-Ar 43485, Ar 43486): PL 5.9-6.0, OL 4.6-5.5. Female (IZCAS-Ar 43488): PL 7.7, OL 9.6.

Diagnosis

Medium Ctenidae (total length male 10.6-11.4, female 12.6-17.3). The species may be diagnosed by the anterior part of the female epigynal field M-shaped (Fig. 7 a), by the epigynal teeth pointed and long, situated posteriorly (Fig. 7 a) and by the vulval fertilisation ducts nearly parallel to the margin of spermathecae, pointing medio-anteriorly (Fig. 7 b). For the diagnosis of holotype male, see Marusik et al. (2012).

Distribution

China (Hainan, type locality, Fig. 1 ).

Figures

Figure 1. New distribution records of ctenid species from China and Vietnam. 1. Anahita menglun sp. n. 2. Bowie haiphong sp. n. 3. B. mengla sp. n. 4. B. zhengi sp. n. 5. Sinoctenus zhui.

Figure 7. Sinoctenus zhui Marusik, Zhang & Omelko, 2012, female. a epigyne, ventral view; b vulva, dorsal view. ET = epigynal teeth, FD = fertilisation duct, SP = spermathecae. Scale bar: 0.20 mm (a - b).