Shokawa is an extinct genus of choristoderan diapsid reptile, known from the Lower Cretaceous of Japan. It is only known from one species, Shokawa ikoi. The only known remains are a postcranial specimen lacking the skull, discovered at the KO2 locality in sediments belonging to the Okurodani Formation near the village of Shokawa in Gifu Prefecture. Shokawa possessed a long neck with at least 16 cervical vertebrae, and closely resembles and is closely related to the smaller choristoderan, Hyphalosaurus.[1][2] The generic name refers to the village near where it was found, while the specific name honors the collector of the first specimen, one Mr. Ikoi Shibata.
| Shokawa Temporal range: Early Cretaceous,
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| Artist's reconstruction | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Choristodera |
| Family: | †Hyphalosauridae |
| Genus: | †Shokawa Evans & Manabe, 1998 |
| Type species | |
| †Shokawa ikoi Evans & Manabe, 1998
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Phylogeny from the analysis of Dong and colleagues (2020):[3]
| Choristodera |
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References
edit- ^ Evans, Susan E.; Manabe, Makoto (January 1999). "A choristoderan reptile from the Lower Cretaceous of Japan". Special Papers in Palaeontology.
- ^ The dentary of a Choristodere (Reptilia: Archosauromorpha) from the Okurodani Formation, Tetori Group (Lower Cretaceous) of Japan [1]
- ^ Dong, Liping; Matsumoto, Ryoko; Kusuhashi, Nao; Wang, Yuanqing; Wang, Yuan; Evans, Susan E. (2020-08-02). "A new choristodere (Reptilia: Choristodera) from an Aptian–Albian coal deposit in China". Journal of Systematic Palaeontology. 18 (15): 1223–1242. Bibcode:2020JSPal..18.1223D. doi:10.1080/14772019.2020.1749147. ISSN 1477-2019. S2CID 219047160.
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