| Acremodonta | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Family: | Ataphridae |
| Genus: | Acremodonta B. A. Marshall, 1983 [1] |
| Type species | |
| Thoristella crassicosta Powell, 1937 | |
Acremodonta is a genus of sea snails, marine gastropod mollusks in the family Ataphridae. [2]
The radula of species in this genus have very long and narrow teeth and dendritic cusps that are repeatedly divided. [3]
Species within the genus Acremodonta include:
The Sirenia, commonly referred to as sea-cows or sirenians, are an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal marine waters. The Sirenia currently comprise two distinct families: Dugongidae and Trichechidae with a total of four species. The Protosirenidae and Prorastomidae families are extinct. Sirenians are classified in the clade Paenungulata, alongside the elephants and the hyraxes, and evolved in the Eocene 50 million years ago (mya). The Dugongidae diverged from the Trichechidae in the late Eocene or early Oligocene.
Genus is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
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Inia is a genus of river dolphins from South America. It contains one to three species.
Podoviridae is a family of viruses in the order Caudovirales. Bacteria serve as natural hosts. There are currently 132 species in this family, divided among 3 subfamilies and 45 genera. This family is characterized by having very short, noncontractile tails.
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Acremodonta crassicosta is a species of minute, deep-water sea snail, a marine gastropod mollusc or micromollusk in the family Ataphridae, the false top snails or false top shells.
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Toxochelys is an extinct genus of marine turtle from the Late Cretaceous period. It is the most commonly found fossilized turtle species in the Smoky Hill Chalk, in western Kansas.
Ogmodirus is an extinct genus of plesiosaur found in the Cenomanian-Turonian Greenhorn Limestone of Kansas. It may be member of the Elasmosauridae, a group of marine animals related to Elasmosaurus, but the condition of the fossils discovered to date means the genus is dubious beyond Plesiosauria. The type species, O. martini, was named by Samuel Wendell Williston and Roy L. Moodie in 1913. The original specimen consisted of a pelvic girdle, limb elements, and more than fifty cervical (neck) vertebrae discovered in Cloud County, Kansas. A second species, Ogmodirus ischiadicus, has since been referred to Styxosaurus. Sepkoski (2002) assigned Ogmodirus to the Plesiosauria.
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John Ernest "Jack" Randall was an American ichthyologist and a leading authority on coral reef fishes. Randall described over 800 species and authored 11 books and over 900 scientific papers and popular articles. He spent most of his career working in Hawaii. He died in April 2020 at the age of 95.
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Stenorhynchosaurus is an extinct genus of pliosaurid plesiosaurs which lived in South America during the Early Cretaceous. The type species and only known is Stenorhynchosaurus munozi.
Hydropelta is a genus of late Jurassic turtle from marine deposits in the Jura Mountains of eastern France.
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