Extant Miocene first appearances

Tripneustes is a genus of sea urchins belonging to the family Toxopneustidae.

genus of birds

Chrysemys is a genus of turtles in the family Emydidae. They are found throughout most of North America. The species in the genus include the painted and the southern painted turtles. ==Reproduction== Chrysemys have temperature dependent sex determination. During egg incubation, lower temperatures produce males while higher temperatures produce females.

genus of molluscs

Diplogastridae, formerly Diplogasteridae, are a family of nematodes (roundworms) known from a wide range of habitats, often in commensal or parasitic associations with insects.

Ashtoret is a genus of crabs in the family Matutidae, containing the following species: Ashtoret granulosa (Miers, 1877) Ashtoret lunaris (Forskål, 1775) Ashtoret maculata (Miers, 1877) Ashtoret miersii (Henderson, 1887) Ashtoret obtusifrons (Miers, 1877) Ashtoret picta (Hess, 1865) Ashtoret sangiannulata Galil & Clark, 1994 Ashtoret shengmuae Galil & Clark, 1994

genus of crustaceans

The tribe Tragelaphini (referred to by some authors as "Strepsicerotini"), or the spiral-horned antelopes, are bovines that are endemic to sub-Saharan Africa. These include the bushbucks, kudus, and the elands. The scientific name is in reference to the mythical creature the tragelaph, a Chimera with the body of a stag and the head of a goat. They are medium-to-large, tall, long-legged antelopes characterized by their twisted horns and striking pelage coloration patterns (most common is the distinctive white, vertical barring).

Penion is a genus of large marine snails, commonly known as siphon whelks, classified within the mollusc family Austrosiphonidae.

The Microporellidae is a family within the bryozoan order Cheilostomatida.

subtribe of cattle

Eutamias is a genus of chipmunks within the tribe Marmotini of the squirrel family. It includes a single living species, the Siberian chipmunk (Eutamias sibiricus). The genus is often treated as a subgenus of Tamias, which is now restricted to the eastern chipmunk of North America. Neotamias, which now includes the western North American chipmunks, has also been included in Eutamias.

Craspedochiton is a genus of chitons in the family Acanthochitonidae, endemic to New Zealand, the Philippines and Australia.

Spirorbis is a genus of very small () polychaete worms, usually with a white coiled shell. Members of the genus live in the lower littoral and sublittoral zones of rocky shores. Spirorbis worms usually live attached to seaweeds, but some species live directly on rocks, shells or other hard substrates. Spirorbis was once thought to have a fossil record extending back into the Early Paleozoic, but now all pre-Bathonian (Middle Jurassic) spirorbins are known to be microconchids. The earliest members of genus appeared in the Miocene, but Oligocene finds may also be possible. The genus contains the

Lissotesta is a genus of minute sea snails or micromolluscs, marine gastropod molluscs, unassigned in the superfamily Seguenzioidea.

subfamily of rodents

Leucozonia is a genus of sea snails, marine gastropod mollusks in the family Fasciolariidae, the spindle snails, the tulip snails and their allies.

Glaphyrina is a genus of large sea snails, marine gastropod mollusc in the family Fasciolariidae.

Chelonibia is a genus of acorn barnacles in the family Chelonibiidae of the subphylum Crustacea. Its members are epizootic and live attached to manatees, turtles, marine molluscs, crabs and horseshoe crabs in all tropical and subtropical oceans. In a few instances, they have been found on sea snakes, alligators and inanimate substrates, but they are not found in the typical habitats of barnacles – on rocks, docks or boats.

Micrelenchus is a genus of small sea snails that have shells with pearly interiors and an operculum. They are marine gastropod molluscs in the subfamily Cantharidinae of the family Trochidae, the top snails or top shells.

Lodderia is a genus of minute sea snails or micromolluscs, marine gastropod molluscs in the family Skeneidae. This genus belonged previously to the family Liotiidae.

Potamochoerini is a tribe of even-toed ungulates which encompasses the giant forest hogs and the river pigs.

Uberella is a genus of sea snails, marine gastropod molluscs in the family Naticidae, the moon snails.

Schilderia is a genus of sea snails, marine gastropod mollusks in the family Cypraeidae, the cowries.

Fenestrulina is a genus within the bryozoan order Cheilostomatida. It is the only member of the family Fenestrulinidae. It has a world-wide distribution.

Cyclograpsus is a genus of crabs, containing the following species:

Actumnus is a genus of crabs in the family Pilumnidae. Alongside the 28 extant species, it has a fossil record extending back into the Miocene.

Crosseola is a genus of minute sea snail or micromollusc, a marine gastropod mollusc in the family Conradiidae.

Sinezona is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Scissurellidae, the little slit shells.

Phasianella, common name the pheasant shells, is a genus of small sea snails with a calcareous operculum and a colorfully patterned shell, a marine gastropod mollusc in the family Phasianellidae.

Lodderena is a genus of minute sea snails or micromolluscs, marine gastropod molluscs, formerly in the family Skeneidae. Following a morphological reevaluation, it was excluded from Skeneidae and treated as incertae sedis within the superfamily Trochoidea.

Argyropeza is a genus of small deep-sea sea snails in the family Cerithiidae.

Retropluma is a genus of heterotrematan crabs belonging to the family Retroplumidae. The extant species survive in the deep sea of the Indo-Pacific region.

Dallina is a genus of small to average size lampshells (maximum long). It is known since the Miocene.