Sennin zhangxinae Lin & Li 2024, sp. nov.
Creators: name: Lin, Yejie
name: Li, Shuqiang
name: Mo, Haolin
name: Wang, Xihao
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theridiosomatidae
Sennin
Sennin zhangxinae

description: 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.
description: Published as part of Lin, Yejie, Li, Shuqiang, Mo, Haolin & Wang, Xihao, 2024, Thirty-eight spider species (Arachnida: Araneae) from China, Indonesia, Japan and Vietnam, pp. 4-98 in Zoological Systematics 49 (1) on pages 92-94, DOI: 10.11865/zs.2024101, http://zenodo.org/record/10941018