Femorbiona shenzhen Yu & Li, 2021

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, Femorbiona gen. nov., a new genus of sac spiders (Araneae, Clubionidae) from Southeast Asia, ZooKeys 1052, pp. 25-41 : 25

publication ID	https://dx.doi.org/10.3897/zookeys.1052.66803
publication LSID	lsid:zoobank.org:pub:0EF3C375-ED5F-4C70-A134-DBE1DA6A5C37
persistent identifier	https://treatment.plazi.org/id/F828E5CC-CEBA-4FBC-942F-3FF97438099B
taxon LSID	lsid:zoobank.org:act:F828E5CC-CEBA-4FBC-942F-3FF97438099B
treatment provided by	ZooKeys by Pensoft
scientific name	Femorbiona shenzhen Yu & Li
status	sp. nov.

Treatment

Femorbiona shenzhen Yu & Li sp. nov.

Figs 5 View Figure 5 , 6 View Figure 6 , 7C View Figure 7 , 8 View Figure 8

Type material.

Holotype ♂ (IZCAS-Ar 34726), CHINA: Guangdong Province: Shenzhen: Meilin Reservoir, 22°34.365'N, 114°0.400'E, ca. 100 m, 01.XI.2020, Q. Lu. leg. Paratype: 1♀ (IZCAS-Ar 34727), same data as holotype.

Diagnosis.

The male of F. shenzhen sp. nov. resembles that of F. phami sp. nov. (Figs 3A-E View Figure 3 , 7B View Figure 7 ) by the embolus which consists of an enlarged base and needle-like apex (cf. Figs 5C-E View Figure 5 , 7C View Figure 7 and Figs 3C-E View Figure 3 , 7B View Figure 7 ), but it differs by having: (1) the femoral apophysis finger shaped (Figs 5A, B View Figure 5 , 7C View Figure 7 ) (vs. shaped like a short wing of a bird or dorsal fin of a fish, as in Fig. 3A, B View Figure 3 ); (2) in ventral view, the embolar apex pointed ventro-distally (Figs 5D View Figure 5 , 7C View Figure 7 ) (vs. pointed prolatero-distally, as in Figs 3D View Figure 3 , 7B View Figure 7 ). The female is similar to F. brachyptera ( Zhu et al. 2012: 53, figs. 6, 7, 11, 12; Fig. 2A-D View Figure 2 ) by the V-shaped epigynal hoods (cf. Fig. 2A, B View Figure 2 and Fig. 6A, B View Figure 6 ), but it differs by having: (1) the copulatory ducts easily visible through the epigynal plate in ventral view (Fig. 6A, B View Figure 6 ) (vs. indistinct, as in Fig. 2A, B View Figure 2 ); (2) the dorsal part of the spermathecae not strongly convoluted, following a C-shaped course (Fig. 6C, D View Figure 6 ) (vs. strongly convoluted, following a double S-shaped course, as in Fig. 2C, D View Figure 2 ).

Description.

Male. Holotype (Figs 6E, F View Figure 6 , 8A View Figure 8 ). Total length 3.79; carapace 1.70 long, 1.22 wide; opisthosoma 2.09 long, 1.02 wide. Colour in life dark brown with red-grey abdomen (Fig. 8A View Figure 8 ). Carapace light brown in ethanol (Fig. 6E, F View Figure 6 ), darker anteriorly, without distinct pattern, fovea black; cephalic region distinctly narrowed, cervical groove and radial grooves indistinct; tegument smooth, clothed with short, fine setae. Eyes: both AER and PER slightly recurved in dorsal view, latter wider than former. Eye sizes and interdistances: AME 0.09, ALE 0.12, PME 0.12, PLE 0.12, AME-AME 0.07, AME-ALE 0.04, PME-PME 0.20, PME-PLE 0.09, MOQL 0.27, MOQA 0.24, MOQP 0.43. Chelicerae robust, dark brown, with six promarginal and four retromarginal teeth. Sternum yellowish white, 0.94 long, 0.62 wide. Labium and endites coloured as carapace. Legs coloured as sternum, without distinct markings. Leg measurements: I 3.59 (1.03, 1.51, 0.68, 0.36), II 4.19 (1.21, 1.75, 0.82, 0.41), III 3.26 (0.97, 1.17, 0.81, 0.31), IV 4.75 (1.43, 1.60, 1.29, 0.43). Abdomen elongate-oval, without pattern; dorsum greyish, anteriorly slightly darker; venter uniformly grey.

Palp (Figs 5A-E View Figure 5 , 7C View Figure 7 ). Femur with finger-shaped retrolateral apophysis originating proximally, apophysis <1/3 length of femur. Patella 2 × longer and 1.3 × wider than tibia, with round prolateral apophysis. Tibia with small, partly membranous ventral apophysis. Bulb inflated, sperm duct indistinct in ventral view. Embolus needle-like, relatively short, <1/10 of tegulum length, originating distally on tegulum, gradually tapered toward tip, apex sharp, ventrally pointed; embolic base an enlarged tubercle.

Female. Paratype (Figs 6G, H View Figure 6 , 8B, C View Figure 8 ). Total length 2.86; carapace 1.39 long, 1.00 wide; opisthosoma 1.48 long, 0.97 wide. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.07, AME-AME 0.06, AME-ALE 0.06, PME-PME 0.15, PME-PLE 0.05, MOQL 0.23, MOQA 0.20, MOQP 0.32. Sternum 0.77 long, 0.50 wide. Leg measurements: I 2.52 (0.69, 1.04, 0.51, 0.28), II missing, III 2.48 (0.69, 1.00, 0.45, 0.34), IV 3.61 (1.09, 1.22, 1.01, 0.28). Similar to male but distinctly larger and lighter coloured.

Epigyne (Fig. 6A-D View Figure 6 ). Epigynal plate distinctly wider than long, through which bursae and copulatory ducts are conspicuous. Hood located posteriorly on epigynal plate, ca. 1/3 of epigyne width, posterior margin heavily sclerotised, slightly procurved, V-shaped. Copulatory openings at lateral border of hood, separated by ca. 3 diameters. Copulatory ducts thick, short, covered by large spermathecae in dorsal view. Spermathecae long, tubular, sinuous, with uniform thickness throughout. Bursae reniform, large, close together, ca. 1.5 × longer than wide, surface translucent, smooth.

Distribution.

Known only from the type locality, Shenzhen, Guangdong, China.

Etymology.

The species name is derived from the type locality; noun in apposition.