Cyrtoneritimorpha
Encyclopedia
Cyrtoneritimorpha is a clade
of fossil sea snail
s, marine
gastropod mollusks within the clade Neritimorpha
.
This order contains two extinct families: Orthonychiidae
and Vltaviellidae
.
Clade
A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...
of fossil sea snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
s, marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
gastropod mollusks within the clade Neritimorpha
Neritimorpha
Neritimorpha is a taxonomic grouping, an unranked clade of snails, gastropod mollusks. This grouping includes land snails, sea snails, some deepwater limpets, and also freshwater snails...
.
This order contains two extinct families: Orthonychiidae
Orthonychiidae
Orthonychiidae is an extinct taxonomic family of marine, gastropod mollusks.There is an unusually great variability between the shells of species in the genus Orthonychia, but an analysis of this variability has not been done yet .-Genera:...
and Vltaviellidae
Vltaviellidae
Vltaviellidae is an extinct taxonomic family of marine, gastropod mollusks....
.