Carcharhinus is the type genus of the family Carcharhinidae, the requiem sharks. One of 12 genera in its family, it contains over half of the species therein. It contains 35 extant and eight extinct species to date, with likely more species yet to be described.
Holoptychius is an extinct genus of porolepiform lobe-finned fish from the Middle Devonian to Carboniferous (Mississippian) periods. It is known from fossils worldwide. The genus was first described by Louis Agassiz in 1839.
Notostylops is a genus of extinct South American ungulates from Eocene Argentina. Fossils of the genus have been found in the Sarmiento, Casamayor, Andesitas Huancache and Koluel Kaike Formations.
Brevidorsum is an extinct genus of dissorophoidean euskelian temnospondyl within the family Dissorophidae.
Rhadalognathus was a prehistoric crocodile-like amphibian that belongs to the Mastodonsauridae family. Not much is known about this creature but it lived in the Triassic period. Rhadalognathus is also the name of the genus in which the organism belongs within. Rhadalognathus was found in northern Arizona, US, by S. P. Welles in 1947. The size of the organism is unknown but its skull is about 17in long and weighs 7lbs.
Ellisoniidae is an extinct family of conodonts, a kind of primitive chordate.
Cornuodus is an extinct genus of conodonts.
Lanea is an extinct conodont genus in the family Spathognathodontidae from the Early Devonian.
Erraticodon is an extinct genus of conodonts in the family Chirognathidae.
Sivahyus was a genus of ground dwelling omnivorous even toed ungulates that existed in Asia during the Pliocene.
Cainochoerinae was a subfamily of even-toed ungulates that existed during the Miocene and Pliocene in Asia and Africa.
Albanohyus was an extinct genus of even-toed ungulates which lived during the Miocene in Eurasia and possibly Africa.
Cainochoerus was an extinct genus of even-toed ungulates which lived during the Miocene and Pliocene in Africa. Fossils have been found in Kenya, Ethiopia and South Africa.
Hyotheriinae was a subfamily of even-toed ungulates that existed during the Miocene and Pliocene in Europe, Asia, and Africa.
Aureliachoerus was an extinct genus of suids that existed during the Miocene in Europe.
Nguruwe was an extinct genus of even-toed ungulates that existed during the Miocene in Africa. It was formerly considered a member of the subfamily Listriodontinae, but has since been placed in Hyotheriinae.
Xenohyus was an extinct genus of suids that existed during the Miocene in Europe.
Parachleuastochoerus was an extinct genus of even-toed ungulates that existed during the Miocene in Europe. It was a smaller descendant of the Conohyus genus, with narrower cheek teeth and reduced premolars.
Shamolagus is an extinct genus of lagomorphs that lived in present-day China and Mongolia during the Eocene epoch. It contains two species, both of which are now extinct: Shamolagus grangeri and S. medius.
Baiera is a genus of prehistoric gymnosperms in the order Ginkgoales. It is one of the oldest fossil foliage types of Ginkgoales, and is related to the genera Ginkgo and Ginkgoites. Fossils of Baiera are found worldwide, and have been known from the Permian to the Cretaceous.
