Search results
Results from the WOW.Com Content Network
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]
It is claimed to be the oldest animal fossil, being found in rock aged between 760 and 550 million years ago. The genus was named after the Otavi Group in Namibia in which the fossils were found. The oldest fossils are from the Tonian period, before the Cryogenian glaciations, but the latest found were from the Nama Group rocks, which are from ...
The fossil gathered by Tozer is 14 mm (0.55 in) in width and 7 mm (0.28 in) in height. The shell is a depressed heliciform in shape with 5 whorls that gradually increase in size from the umbilicus and a thin outer lip. The shell is rounded and coarsely striate, with the umbilicus taking up 1/3 of the shell. [1]
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.
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
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 ...
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 ...
The genus Vermetus is very ancient: it occurs in the fossil record from the Jurassic to the Quaternary (age range: from 164.7 to 0.0 million years ago). [ 2 ] Species