Omphalotrochus
# Omphalotrochus

Omphalotrochus is an extinct taxonomic genus of Paleozoic gastropods. It is widely distributed in the upper Paleozoic and has been an important index fossil.

## Species

Species in the genus Omphalotrochus include:

* O. alleni Yochelson, 1956
* O. antiquus d'Orbigny, 1842
* O. calaniculatus Trautschold, 1879
* O. cochisensis Yochelson, 1956
* O. hessensis Yochelson, 1956
* O. kalitvaensis Licharev, 1940
* O. kalmiussi Zernetskaya, 1967
* O. karakubensis Zernetskaya, 1967
* O. obtusispira Shumard, 1859
* O. spinosus Yochelson, 1956
* O. whitneyi Meek, 1864
* O. wolfcampensis Yochelson, 1956
