Euomphalus is a genus of fossil marine gastropods known to have lived from the Silurian to the Middle Permian.
Description
Euomphalus is characterized by a closely coiled shell with a depressed to slightly elevated spire and a channel-bearing angulation (a selenizone) on the upper surface of the whorls. The lower surface of the whorls is rounded to angular.
Amphiscapha, Philoxene, and Straparollus are among similar related genera. Serpulospira, also related, differs in having a broadly open spiral in the adult form.
Taxonomy
Euomphalus is the type genus of the family Euomphalidae. Euomphalus pentangulatus (Sowerby, 1814) is its type species.
Species
Currenct species valid or need reassesment
- Euomphalus pentangulatus <small>Sowerby, 1814(type)</small>
- Euomphalus radiatus <small>Menke, 1850</small>: synonym of Heliacus (Heliacus) areola bicanaliculatus <small>(Valenciennes, 1832)</small> represented as Heliacus areola bicanaliculatus <small>(Valenciennes, 1832)</small>
- Euomphalus africanum (Heidelberger, Korn & Ebbighausen, 2009) âÂÂ
- Euomphalus cornudanus (Shumard, 1859) âÂÂ
- Euomphalus intermedius (M. Gordon & Yochelson, 1983) âÂÂ
- Euomphalus kaibabensisChronic, 1952 âÂÂ
- Euomphalus mapingensis (Grabau, 1936) âÂÂ
- Euomphalus marginatiformis (B. K. Likharev, 1967) âÂÂ
- Euomphalus marginatus Eichwald, 1860 âÂÂ
- Euomphalus moniliferus Romanovsky, 1890 âÂÂ
- Euomphalus obtusus J. Hall, 1858 âÂÂ
- Euomphalus peskensis (Mazaev, 1994) âÂÂ
- Euomphalus pirochiensis (Mazaev, 1994) âÂÂ
- Euomphalus tenuistriatus X.-G. Zhu, 1995 âÂÂ
Species that need a review
- Euomphalus archiaci Goldfuss, 1844 âÂÂ
- Euomphalus basinodosus Kirchner, 1915 âÂÂ
- Euomphalus bronnii Goldfuss, 1844 âÂÂ
- Euomphalus circularis J. Phillips, 1841 âÂÂ
- Euomphalus contrarius Münster, 1841 âÂÂ
- Euomphalus depressus J. Hall, 1843 âÂÂ
- Euomphalus discus Goldfuss, 1844 âÂÂ
- Euomphalus disiunctus Goldfuss, 1844 âÂÂ
- Euomphalus eurekensis Walcott, 1884 âÂÂ
- Euomphalus gradatus Koken, 1896 âÂÂ
- Euomphalus jiangyouensis Y.-T. Pan, 1978 âÂÂ
- Euomphalus latus Y.-T. Pan, 1978 âÂÂ
- Euomphalus majiaobaensis Y.-T. Pan, 1978 âÂÂ
- Euomphalus minimus McCoy, 1847 âÂÂ
- Euomphalus nitidulus Lindström, 1880 âÂÂ
- Euomphalus obtusangulus Lindström, 1880 âÂÂ
- Euomphalus planodorsatus Meek & Worthen, 1861 âÂÂ
- Euomphalus planorbis d'Archiac & Verneuil, 1842 âÂÂ
- Euomphalus praecursor Lindström, 1884 âÂÂ
- Euomphalus pygmaeus Münster, 1841 âÂÂ
- Euomphalus pygmaeus Dunker, 1848 â invalid; not Münster, 1841)
- Euomphalus rotula Goldfuss, 1844 âÂÂ
- Euomphalus schnuri d'Archiac & Verneuil, 1842 âÂÂ
- Euomphalus semiteres Goldfuss, 1844 âÂÂ
- Euomphalus serpens J. Phillips, 1841 âÂÂ
- Euomphalus spinosus Goldfuss, 1844 âÂÂ
- Euomphalus strongi Whitfield, 1878 âÂÂ
- Euomphalus triquetrus Lindström, 1884 âÂÂ
- Euomphalus tuba Lindström, 1884 âÂÂ
- Euomphalus umbilicatus Meek & Worthen, 1861 âÂÂ
- Euomphalus vermilia Goldfuss, 1844 âÂÂ
- Euomphalus vermis Whidborne, 1896 âÂÂ
- Euomphalus verneuillii Goldfuss, 1844 âÂÂ
- Euomphalus walmstedti Lindström, 1884 âÂÂ
References