Euomphalus

Euomphalus Temporal range: Silurian–Kungurian PreꞒ Ꞓ O S D C P T J K Pg N
Euomphalus pentangulatus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Family:	† Euomphalidae
Genus:	† Euomphalus J. de C. Sowerby, 1814

Euomphalus is a genus of fossil marine gastropods known to have lived from the Silurian to the Middle Permian. ^{[1] [2]}

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. ^[1]

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 ^[3]

• Euomphalus pentangulatusSowerby, 1814(type)
• Euomphalus radiatusMenke, 1850: synonym of Heliacus (Heliacus) areola bicanaliculatus(Valenciennes, 1832) represented as Heliacus areola bicanaliculatus(Valenciennes, 1832)
• Euomphalus africanum (Heidelberger, Korn & Ebbighausen, 2009) †
• Euomphalus cornudanus (Shumard, 1859) †
• Euomphalus intermedius (M. Gordon & Yochelson, 1983) †
• Euomphalus kaibabensisChronic, 1952 †
• Euomphalus mapingensis (Grabau, 1936) †
• Euomphalus marginatiformis (B. K. Likharev, 1967) †
• Euomphalus marginatus Eichwald, 1860 †
• Euomphalus moniliferus Romanovsky, 1890 †
• Euomphalus obtusus J. Hall, 1858 †
• Euomphalus peskensis (Mazaev, 1994) †
• Euomphalus pirochiensis (Mazaev, 1994) †
• Euomphalus tenuistriatus X.-G. Zhu, 1995 †

Species that need a review

• Euomphalus archiaci Goldfuss, 1844 †
• Euomphalus basinodosus Kirchner, 1915 †
• Euomphalus bronnii Goldfuss, 1844 †
• Euomphalus circularis J. Phillips, 1841 †
• Euomphalus contrarius Münster, 1841 †
• Euomphalus depressus J. Hall, 1843 †
• Euomphalus discus Goldfuss, 1844 †
• Euomphalus disiunctus Goldfuss, 1844 †
• Euomphalus eurekensis Walcott, 1884 †
• Euomphalus gradatus Koken, 1896 †
• Euomphalus jiangyouensis Y.-T. Pan, 1978 †
• Euomphalus latus Y.-T. Pan, 1978 †
• Euomphalus majiaobaensis Y.-T. Pan, 1978 †
• Euomphalus minimus McCoy, 1847 †
• Euomphalus nitidulus Lindström, 1880 †
• Euomphalus obtusangulus Lindström, 1880 †
• Euomphalus planodorsatus Meek & Worthen, 1861 †
• Euomphalus planorbis d'Archiac & Verneuil, 1842 †
• Euomphalus praecursor Lindström, 1884 †
• Euomphalus pygmaeus Münster, 1841 †
• Euomphalus pygmaeus Dunker, 1848 † invalid; not Münster, 1841)
• Euomphalus rotula Goldfuss, 1844 †
• Euomphalus schnuri d'Archiac & Verneuil, 1842 †
• Euomphalus semiteres Goldfuss, 1844 †
• Euomphalus serpens J. Phillips, 1841 †
• Euomphalus spinosus Goldfuss, 1844 †
• Euomphalus strongi Whitfield, 1878 †
• Euomphalus triquetrus Lindström, 1884 †
• Euomphalus tuba Lindström, 1884 †
• Euomphalus umbilicatus Meek & Worthen, 1861 †
• Euomphalus vermilia Goldfuss, 1844 †
• Euomphalus vermis Whidborne, 1896 †
• Euomphalus verneuillii Goldfuss, 1844 †
• Euomphalus walmstedti Lindström, 1884 †

References

1. J.B.Knight,et al 1960. Treatise on Invertebrate Paleontology, Part I, Mollusca 1, ch on systematic descriptions. Geol Soc of America and Univ Kansas Press.
2. (in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: Základy zoopaleontologie. - Olomouc, 1996. 264 pp., ISBN   80-7067-599-3.
3. https://www.molluscabase.org/aphia.php?p=taxdetails&id=689395