Hyaenodontidae is a family of placental mammals in the extinct superfamily Hyaenodontoidea. Hyaenodontids arose during the early Eocene and persisted well into the early Miocene. Fossils of this group have been found in Asia, North America and Europe.
Pristichampsus is a non-diagnostic and potentially dubious extinct genus of crocodylian from France and possibly also Kazakhstan that is part of the monotypic Pristichampsidae family. As the type species, Pristichampsus rollinatii, was based on insufficient material when described in 1831 and 1853, the taxonomic status of the genus is in doubt, and other species have been referred to other genera, primarily Boverisuchus.
Iberosuchus is a genus of extinct sebecosuchian mesoeucrocodylian found in Western Europe from the Eocene. Remains from Portugal was described in 1975 by Antunes as a sebecosuchian crocodilian. This genus has one species: I. macrodon. Iberosuchus was a carnivore. Unlike the crocodilians today, they were not aquatic but were instead terrestrial.
Anosteira is an extinct genus of carettochelyid turtle from the Eocene to the Oligocene of Asia and North America.
Diaphyodus is an extinct genus of prehistoric marine ray-finned fish, generally considered a drumfish, from the Late Paleocene and Eocene, and potentially to the mid-Oligocene of Europe and North America.
Archaeonycteridae is a family of extinct bats. It was originally erected by the Swiss naturalist Pierre Revilliod as Archaeonycterididae to hold the genus Archaeonycteris. It was formerly classified under the superfamily Icaronycteroidea (disused) by Kurten and Anderson in 1980. In 2007, the spelling was corrected to Archaeonycteridae and it was reclassified to the unranked clade Microchiropteramorpha by Smith et al.. The family Palaeochiropterygidae was also merged into Archaeonycteridae by Kurten and Anderson, but modern authorities specializing in bat fossils maintain the distinction between the two.
Palaeochiropterygidae is a family of extinct bats. It was originally erected by the Swiss naturalist Pierre Revilliod in 1917 after discoveries of Palaeochiropteryx fossils from the Messel Pit of Germany. Palaeochiropterygidae was merged into Archaeonycteridae by Kurten and Anderson in 1980, but modern authorities specializing in bat fossils maintain the distinction between the two. It was classified to the unranked clade Microchiropteramorpha by Smith et al. in 2007.
Messelepone is an extinct genus of ants in the formicid subfamily Ponerinae described from fossils found in Europe. M. leptogenoides is the only species assigned to the genus, which is one of several Lutetian Ponerinae genera.
Anatoliadelphys maasae is an extinct genus of predatory metatherian mammal from the Eocene of Anatolia. It was an arboreal, cat-sized animal, with powerful crushing jaws similar to those of the modern Tasmanian devil. Although most mammalian predators of the northern hemisphere in this time period were placentals, Europe was an archipelago, and the island landmass now forming Turkey might have been devoid of competing mammalian predators, though this may not matter since other carnivorous metatherians are also known from the Cenozoic in the Northern Hemisphere. Nonetheless, it stands as a reminder that mammalian faunas in the Paleogene of the Northern Hemisphere were more complex than previously thought, and metatherians did not immediately lose their hold as major predators after their success in the Cretaceous.
Eoconstrictor is an extinct genus of booid snake, which supposedly had infrared vision, from the Eocene of Germany. The type species, E. fischeri is known from multiple well-preserved specimens found in the Messel Pit of Germany. It was originally named as Palaeopython fischeri by Stephan Schaal in 2004, but examination of the genus showed that it represented a distinct lineage; it was renamed as the new genus Eoconstrictor in 2020. In a subsequent study Georgalis, Rabi & Smith (2021) reinterpreted "Paleryx" spinifer from the Eocene Geiseltal Lagerstätte as the second species belonging to the genus Eoconstrictor. Palci et al. (2023) named the third species belonging to this genus, E. barnesi described on the basis of fossils from the Geiseltal Lagerstätte.
Aturobatis is an extinct genus of Myliobatiform ray from the Eocene epoch. It contains a single described species, A. aquensis; however, the range of variation in this species is not well understood and it is unclear whether all specimens attributed to the genus are the same species. It is also unknown to which family this genus belongs. The type locality is the Lutetian of southern France. This genus is also known from the Ypresian of the United States, the Lutetian Lisbon Formation of Alabama, and the Priabonian Samlat Formation of Dakhla, Morocco.
Hilalia is an extinct genus of condylarth that lived during the Eocene. Fossils of Hilalia have been found at Uzunçarsidere Formation in Turkey. It was the last surviving genus of Pleuraspidotheriids, which were previously thought to have gone extinct during the Late Palaeocene.
Amphiperatherium is an extinct genus of metatherian mammal, closely related to marsupials. It ranged from the Early Eocene to the Middle Miocene in Europe. It is the most recent metatherian known from the continent.
Hyaenodontoidea is a superfamily of extinct predatory mammals from extinct order Hyaenodonta. Fossil remains of these mammals are known from early Eocene to early Miocene deposits in North America, Europe and Asia.
Hyaenodontinae is an extinct subfamily of predatory placental mammals from extinct family Hyaenodontidae. Fossil remains of these mammals are known from early Eocene to early Miocene deposits in Europe, Asia and North America.
Hyainailouroidea ("hyena-cats") is a superfamily of extinct predatory mammals from extinct order Hyaenodonta. Fossil remains of these mammals are known from middle Eocene to late Miocene deposits in North America, Europe, Africa and Asia. Members of this group probably originate from Afro-Arabia, a continent that remained isolated from the Albian to the Miocene. While in North America and Eurasia hyaenodonts competed with other predatory mammals, in Afro-Arabia they remained the main terrestrial predators.
Apterodontinae is an extinct subfamily of hyainailourid hyaenodonts that lived in Africa and Europe during the late Eocene to middle Oligocene.
Tethylamna is an extinct genus of mackerel sharks that lived during the Eocene. It contains one valid species, T. dunni, and another potential species, T. twiggsensis. Its fossils have been found in North America, South America, Africa, and Asia. T. twiggsensis has also been assigned to Brachycarcharias.
Neochelys is an extinct genus of freshwater side-necked turtle that inhabited Europe during the Eocene. It was a diverse genus known throughout western and southern Europe from the Ypresian to the Priabonian.
Preregidens is an extinct genus of placental mammals from extinct family Hyaenodontidae, found in what is now France. It lived during the early Eocene epoch. It is a monotypic genus that contains the species P. langebadrae.
