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Wentletraps are small, often white, very high-spired, predatory or ectoparasitic sea snails, marine gastropod mollusks in the family Epitoniidae. [1]The word wentletrap originated in Dutch (wenteltrap), and it means spiral staircase.
Understanding of early cephalopod origins is by necessity biased by the available fossil material, which on the whole consists of shelly fossils. Critical fossils are detailed below; since their stratigraphic age has guided the interpretation of the fossils, [ 13 ] they are listed in descending order of age.
The moon snail envelops the prey and then bores a hole through the shell using its radula and an acid secretion. Once the shell is bored open, the proboscis is used to consume the flesh of the prey. The hole in the shell, which has a " countersunk " appearance with chamfered edges, and which varies in size according to the species, is a ...
As of 2017, 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. [ 6 ] Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class ...
The algific talus slope habitat that harbors the snail is a landscape cooled by air and water emerging from masses of subterranean ice. The ground temperature rarely exceeds 10 °C (50 °F), even in summer. Here the snail feeds on leaf litter from trees (mainly birch, maple and dogwood) and shrubs. During the winter, it burrows underground and ...
Fossilized shell of the Silurian-Permian sea snail Euomphalus †Euomphalus †Euomphalus brooksensis †Euomphalus bundtzeni †Euomphalus planodorsatus – or unidentified related form †Euomphalus planorbis †Euomphalus utahensis – or unidentified related form †Favosites †Favosites emmonsi – or unidentified comparable form
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.
One variety of "Turritella agate", that from the Green River Formation in Wyoming, is a fossiliferous rock which does indeed contain numerous high-spired snail shells. However, contrary to the common name, these snails are not in the marine genus Turritella , instead they are freshwater snails in the species Elimia tenera , family Pleuroceridae ...