Euomphalidae is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Paleozoic The Paleozoic ( , , ; or Palaeozoic) Era is the first of three Era (geology), geological eras of the Phanerozoic Eon. Beginning 538.8 million years ago (Ma), it succeeds the Neoproterozoic (the last era of the Proterozoic Eon) and ends 251.9 Ma a ...

to early

Mesozoic The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian r ...

marine

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

s which may be

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

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 abalone, which are ...

Genera

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

The Paleobiology Database The Paleobiology Database (PBDB) is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database 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. It is sometimes regarded as a subgenus of '' Stra ...

'' * '' 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 an extinct genus of gastropod from the Lower and Middle Jurassic of Europe, mostly on Germany, France and United Kingdom. Other posible records include specimens from Hungary of Earliest Jurassic (Hettangian) age. As well there ...

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

Cylicioscapha ''Cylicioscapha'' is an extinct genus of fossil mollusk, probably a gastropod, a robust-looking Euomphalidae, euomphalid from the upper Paleozoic of North America. Description The shell is depressed on both the upper and lower sides; the outer r ...

'' * '' 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 Ameri ...

'' J. de C. Sowerby, 1814 -

type genus In biological taxonomy, the type genus (''genus typica'') 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-bearin ...

- 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 marine gastropods in the family Euomphalidae. This genus is known from the Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the ...

'' - 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.
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