Euomphalus

Euomphalus Temporal range: Silurian–Permian PreЄ Є O S D C P T J K Pg N

Euomphalus pentangulatus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superfamily:	Euomphaloidea
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) is its type species.

Species

Euomphalus radiatus Menke, 1850: synonym of Heliacus (Heliacus) areola bicanaliculatus (Valenciennes, 1832) represented as Heliacus areola bicanaliculatus (Valenciennes, 1832)

References

1 2 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.
↑ (in Czech) Pek I., Vašíček Z., Roček Z., Hajn. V. & Mikuláš R.: Základy zoopaleontologie. - Olomouc, 1996. 264 pp., ISBN 80-7067-599-3.

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