Euomphalidae is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...

to early

Mesozoic The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceo ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

s which may be

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

s with anisostrophically coiled shells (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). The shells show a

selenizone A selenizone (from the Greek "selene" meaning "moon", and "zone" meaning "girdle") is an anatomical structure that exists in the shells of some families of living sea snails: the slit shells, the little slit shells and the abalones, which are m ...

Genera

Genera in the family Euomphalidae include:''Euomphalidae''

The Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ...

, accessed 12 August 2009. * '' Acanthonema'' * '' Alaionema'' * ''

Amphiscapha ''Amphiscapha'' is a fossil gastropod mollusk, or less likely a monoplacophoran, genus from the Pennsylvanian and Lower Permian of North and South America, included in the family Euomphalidae Euomphalidae is an extinct family of Paleozoic ...

'' * '' Anisostoma'' * '' Araeonema'' - synonym: ''Palaeoturbina'' * '' Austerum'' * '' Bicarina'' * '' Biformispira'' * ''

Centrifugus †''Centrifugus'' is an extinct species of fossil sea snail, a marine gastropod mollusk in the family Euomphalidae, which paleontologists place in the order Archaeogastropoda. This species was originally known from the Upper Silurian of north ...

'' - synonym: ''Hisingeria'' * ''

Coelodiscus ''Ceolodiscus'' is a genus in the gastropod family Euomphalidae from the Lower and Middle Jurassic of Europe. The shell is small but stocky; involute or with a slightly protruding spire. Whorls are generally smooth, evenly rounded and slightly ...

'' C.-C.Jao, 1941 (unaccepted) * ''

Cylicioscapha ''Cylicioscapha'' is an extinct genus of fossil mollusk, probably a gastropod, a robust-looking euomphalid from the upper Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ' ...

'' * '' Discotropis'' * '' Eleutherospira'' * '' Elkoceras'' * '' Euomphalopsis'' * ''

Euomphalus ''Euomphalus'' is a genus of fossil marine gastropods known to have lived from the Silurian to the Middle Permian.J.B.Knight,et al 1960. Treatise on Invertebrate Paleontology, Part I, Mollusca 1, ch on systematic descriptions. Geol Soc of Amer ...

'' J. de C. Sowerby, 1814 -

type genus In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International Code of Zoological Nomenclature, "The name-bearing type of a nominal f ...

- synonyms: ''Phymatifer'', ''Schizostoma'', ''Paromphalus''. * '' Fletcherviewia'' * '' Goldfussoceras'' * '' Hippocampoides'' * '' Kiaeromphalus'' * '' Leptomphalus'' * '' Linsleyella'' * '' Nevadaspira'' * '' Nodeuomphalus'' * '' Novakopteron'' * '' Nummocalcar'' * '' Odontomaria'' * '' Offleyotrochus'' * '' Phanerotinus'' * '' Planotectus'' * '' Platybasis'' * '' Pleuronotus'' * ''

Poleumita ''Poleumita'' is an extinct genus of medium-sized sea snails, fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells ...

'' - synonyms: ''Polytropina'', ''Polytropis''. * '' Rhabdotocochlis'' * '' Saturnotropis'' * '' Sinistrispira'' * '' Sinutropis'' * '' Spinicharybdiinae'' * '' Straparollus'' * '' Stusakia'' * '' Tychobrahea'' * '' Weeksia'' * '' Woehrmannia''

References

* Bouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia. 61(1-2): 1–526.

External links

Linsley R.M. & Yochelson E.L. 1973. Devonian Carrier Shells (Euomphalidae) from North America and Germany. Geological Survey Professional Paper, 824: 1-26, pl. 1-6.

External links

{{paleo-gastropod-stub