Sennin (spider)
| Sennin | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Theridiosomatidae |
| Genus: | Sennin Suzuki, Hiramatsu & Tatsuta, 2022 |
| Type species | |
| Sennin tanikawai Suzuki, Hiramatsu & Tatsuta, 2022[1]
| |
| Species | |
Sennin is a troglophilic genus of spiders in the family Theridiosomatidae which was discovered in 2022 containing four species.
Identifiable features which distinguish this genus are: an apophysis located on the dorsal aspect of the cymbium on the male palpal bulb, an embolus segmentation containing 3 long apophyses, a median apophysis on the male pedipalp reminiscent of spiders in the genus Baalzebub, an epigynal plate bearing two triangular sclerotised protrusions on the plates anterior margin, and an epigynum featuring lengthened copulatory ducts which coil on the spermathecae's basal side.[2]
Species
Four species belonging to this genus have been discovered as of 2025:[1]
- Sennin coddingtoni Suzuki, Hiramatsu & Tatsuta, 2022
- Sennin tanikawai Suzuki, Hiramatsu & Tatsuta, 2022
- Sennin shuanglong Yao & Liu, 2023
- Sennin zhangxinae Lin & Li, 2024
Relation to the Theridiosomatinae
Sennin bears similarities to the genera Baalzebub and Karstia, which would place Sennin in the subfamily Theridiosomatinae and polyphlyletically separate Baalzebub and Karstia. However a phylogenetic study has not yet been conducted to support this.[2]
References
- ^ a b "NMBE - World Spider Catalog". wsc.nmbe.ch. Retrieved 2025-08-14.
- ^ a b Suzuki, Yuya; Hiramatsu, Takehisa; Tatsuta, Haruki (2022-01-01). "Two new species and a new genus of ray spiders (Araneae, Theridiosomatidae) from the Ryukyu Islands, southwest Japan, with notes on their natural history". ZooKeys (1109): 67–101. Bibcode:2022ZooK.1109...67S. doi:10.3897/zookeys.1109.83807. ISSN 1313-2989. PMC 9848742. PMID 36762341.