Ryuthela
Ryuthela is a spider genus in the subfamily Heptathelinae, family Liphistiidae. This genus, as well as their closest relatives, Heptathela, formed when land masses from present-day Japan separated from the rest of Asia, forming islands in the late Miocene. Speciation of Ryuthela and Heptathela also occurred during this time, because of the further separation of islands, causing allopatric speciation.
They exhibit intraspecific variation in female genitalia despite being morphologically alike. Male spiders live only a few weeks after reaching maturity whereas female spiders can live up to 10 to 20 years.
, the World Spider Catalog accepted the following species:Ryuthela banna Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela henoko Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela hirakubo Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela iheyana Ono, 2002 — Ryukyu IslandsRyuthela ishigakiensis Haupt, 1983 — Ryukyu IslandsRyuthela kisenbaru Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela motobu Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela nago Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela nishihirai — Ryukyu IslandsRyuthela owadai Ono, 1997 — Ryukyu IslandsRyuthela sasakii Ono, 1997 — Ryukyu IslandsRyuthela shimojanai Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela tanikawai Ono, 1997 — Ryukyu IslandsRyuthela unten Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu IslandsRyuthela yarabu Xu, Liu, Ono, Chen, Kuntner & Li, 2017 — Ryukyu Islands