| Ryukuaster | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Order: | Valvatida |
| Family: | Goniasteridae |
| Subfamily: | Pentagonasterinae |
| Genus: | Ryukuaster Mah, 2007 |
| Species: | R. onnae |
| Binomial name | |
| Ryukuaster onnae Mah, 2007 | |
Ryukuaster is a monotypic genus of echinoderms belonging to the family Goniasteridae. The only species is Ryukuaster onnae.
The species is found in Japan.
