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Temporal range: Silurian–Permian
Euomphalus pentangulatus.JPG
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]


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.


Euomphalus is the type genus of the family Euomphalidae. Euomphalus pentangulatus (Sowerby) is its type species.


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


  1. ^ a b 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.