Sennin zhangxinae Lin & Li, 2024

Lin, Yejie, Li, Shuqiang, Mo, Haolin & Wang, Xihao, 2024, Thirty-eight spider species (Arachnida: Araneae) from China, Indonesia, Japan and Vietnam, Zoological Systematics 49 (1), pp. 4-98 : 92-94

Sennin zhangxinae Lin & Li , sp. nov. ( Figs 77–79 , 80B–C )

Etymology. The specific name is dedicated to Ms. Xin Zhang (Beijing, China), who has helped us greatly with this research; noun (name) in genitive case.

Diagnosis. The male of the new species can be distinguished from S. tanikawai by having the cymbial apophysis shorter than the cymbial lamella (vs. longer) and the embolic apophysis lacking coils (vs. coils present). Females can be distinguished by the long, narrowed scape and the oval spermathecae (vs. triangular scape).

Description. Male (holotype). Total length 1.53, carapace 0.61 long, 0.75 wide, opisthosoma 0.98 long, 0.97 wide. Eye sizes and interdistances: AME 0.04, ALE 0.04, PME 0.05, PLE 0.04, AME–AME 0, AME–ALE 0.02, PME–PME 0.02, PME–PLE 0.02, AME–PME 0.02, ALE–PLE 0. Chelicerae with 5 promarginal teeth. Leg measurements: I 3.01 (0.95, 0.98, 0.72, 0.36), II 2.66 (0.83, 0.88, 0.60, 0.35), III 1.86 (0.59, 0.57, 0.43, 0.27), IV 2.12 (0.68, 0.70, 0.47, 0.27).

Coloration ( Fig. 80A ). Carapace yellowish brown, darker anteriorly, edge black. Chelicerae, labium brown. Sternum yellowish brown. Legs yellowish brown, with dense setae. Tibiae of legs I and II expanded. Opisthosoma oval, gray, surface with sparse, long setae, venter darker than dorsum.

Palp ( Figs 77–78 ). Patella and tibia with strong retrolateral macroseta. Cymbial apophysis almost as long as cymbial lamella, both triangular. Paracymbium needle shaped Bulb oval. Tegular apophysis serrated, oval, with 2 parts: anterior part blunt, triangular, posterior part with needle-shaped outgrowth. Embolus covered with semitransparent conductor, with 2 slender, curved apophyses and 4 lamellar apophyses.

Female (paratype Ar44906). Total length 2.44, carapace 0.82 long, 0.84 wide, opisthosoma 1.62 long, 1.37 wide. Eye sizes and interdistances: AME 0.04, ALE 0.06, PME 0.06, PLE 0.06, AME–AME 0, AME–ALE 0.03, PME–PME 0.03, PME–PLE 0.03, AME–PME 0.03, ALE–PLE 0. Chelicerae with 5 promarginal teeth. Leg measurements: I 3.44 (1.14, 1.09, 0.75, 0.46), II 2.98 (0.92, 1.02, 0.65, 0.39), III 2.01 (0.62, 0.61, 0.47, 0.31), IV 2.46 (0.84, 0.84, 0.52, 0.26).

Coloration ( Fig. 80B ). Similar to that of male.

Epigyne ( Fig. 79 ). Epigynal plate sclerotized, nearly triangular, almost 1.3 times longer than wide. Scape triangular, 2 times longer than wide. Spermathecae barely visible through integument. Copulatory ducts meandering. Spermathecae oval, separated by about their diameter. Fertilization duct directed at 9:00-o’clock-position from spermatheca.

Material examined. Holotype ♂ (IZCAS-Ar44905), Vietnam: Hai Phong, Cat Ba National Park, Natural Forest , Sieving , 16.VII.2008, Dinh-Sac Pham leg. Paratypes. 1♂ 15♀ (IZCAS-Ar44906–Ar44921), same data as holotype .

Distribution. Known only from the type locality.

Figures

Figure 77. Sennin zhangxinae Lin & Li, sp. nov., holotype male. A. Left palp, prolateral view; B. Same, ventral view; C. Same, retrolateral view. Abbreviations: C—conductor; CA—cymbial apophysis; CL—cymbial lamella; E—embolus; P—paracymbium; TA—tegular apophysis. Scale bars=0.1mm.

Figure 78. Sennin zhangxinae Lin & Li, sp. nov., holotype male.A. Embolic tip. dorsal view; B. Same, ventral view; C. Paracymbium, retrolateral view. D. Tegular apophysis Abbreviations: CA—cymbial apophysis; CL—cymbial lamella; P—paracymbium. Scale bars: A–C =0.05 mm; D=0.03mm.

Figure 79. Sennin zhangxinae Lin & Li, sp. nov., paratype female. A. Epigyne, ventral view; B. Vulva, dorsal view. Abbreviations: CD—copulatory duct; FD—fertilization duct; S—spermatheca; SC—scape. Scale bars=0.1mm.

Figure 80. Theridiosomatidae spp., dorsal view, holotype (A–B) and paratype (C), habitus. A. Coddingtonia chenyufengi Lin & Li, sp. nov.; B–C. Sennin zhangxinae Lin & Li, sp. nov., male and female. Scale bars: A =0.2 mm; B–C=0.3mm.