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Anomphalus jaggerius is an extinct species of Permian sea snail. Fossils have been found in Artinskian era limestone from the Bird Spring Formation in the southern Arrow Canyon Range of the US State of Nevada. The species, which had a shell 6.37 millimetres (0.251 in) wide, was a subtidal epifaunal grazer. [1]
Anguispira russelli was a species of pulmonate land snail in the family Discidae, the disk snails. The species is only known from fossilized specimens. It is named after L.S. Russell, former Director of Zoology at the National Museum of Canada .
The oldest fossil cerionid is C. acherontis from the Upper Cretaceous Hell Creek Formation, in Montana, northwestern USA. [5] The second oldest record is the genus Brasilennea from the Brazilian Paleocene Itaboraí Basin , in Rio de Janeiro.
This list of marine gastropod genera in the fossil record is an attempt to list all the genera of sea snails or marine gastropod mollusks which have been found in the fossil record. Nearly all of these are genera of shelled forms, since it is relatively rare for gastropods without a shell ( sea slugs ) to leave any recognizable traces.
Pleurotomariidae, common name the "slit snails", is a family of large marine gastropods in the superfamily Pleurotomarioidea of the subclass Vetigastropoda. [1] This family is a very ancient lineage; there were numerous species in the geological past. The genus includes several hundred fossil forms, mostly Paleozoic.
Holopea is an extinct genus of fossil sea snails, Paleozoic gastropod mollusks in the family Holopeidae. [1]These molluscs were stationary epifaunal suspension feeders. They lived in the Paleozoic Era, Ordovician Period, upper Arenigian age (between 478.6 ± 1.7 and 471.8 ± 1.6 million years ago) to the Carboniferous period, lower Serpukhovian age (from 328.3 (± 1.6) Ma to 318.1 (± 1.3) mya).
Two neogastropods, Brunneifusus ternatanus (left) and Murex trapa (right) in captivity. The available fossil record of Neogastropoda is relatively complete, and supports a widely accepted evolutionary scenario of an Early Cretaceous origin of the group followed by two rapid diversification rounds in the late Cretaceous and the Paleocene.
Archaeostylus manukauensis is an extinct species of flax snail, a large air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Bothriembryontidae. [ 2 ] This species is the typetaxon and only member of the monotypic genus Archaeostylus , found in Pliocene age sediments of northern New Zealand .