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Pantotheria
Pantotheria is an abandoned taxon of Mesozoic mammals. This group is now considered an informal "wastebasket" taxon and has been replaced by Dryolestida as well as other groups. It is sometimes treated as an infraclass and older books refer to it as being related to symmetrodonts. One classification makes it an infraclass with a single order, Eupantotheria. Taxonomy List of mammals that were at one time included in the group PantotheriaMikko's Phylogeny Archiv *Genus †'' Tribactonodon, Tribactonodon bonfieldi'' Sigogneau-Russell, Hooker & Ensom 2001 *Genus †'' Paraungulatum rectangularis'' Bonaparte 1999 *Genus †'' Argaliatherium robustum '' Cifelli & Davis 2015 *Genus †'' Carinalestes murensis'' Cifelli & Davis 2015 *Genus †'' Hypomylos'' Sigogneau-Russell 1992 *Family † Picopsidae Fox 1980 **Genus †'' Picopsis pattersoni'' Fox 1980 **Genus †'' Tirotherium aptum'' Montellano-Ballesteros & Fox 2015 *Family † Casamiqueliidae Bonaparte 1999 **Genus †'' Casa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trituberculata
Trituberculata is an extinct group of animals existing in the fossil record from about 215 – 85 MYA. It contains the ancestors of Placentalia and Marsupialia; all modern mammals except Monotremata are descended from trituberculates. It is named for the three tubercles (cusps) of the molar teeth (not to be confused with Triconodonta). The clade Trituberculata is not always regarded as a valid one, and it likely does not form a monophyletic group. Instead, some of them may be "true" basal mammals (although not always closest related to each other), while others (such as the symmetrodonts) may fall just outside the therian crown group. See also *Eutheria *Multituberculata References Jurassic mammals Cretaceous mammals {{cretaceous-mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryolestida
Dryolestida is an extinct order of mammals, primarily and possibly exclusively known from the Jurassic and Cretaceous. They are considered members of the clade Cladotheria, close to the ancestry of therian mammals. It is also believed that they developed a fully mammalian jaw and also had the three middle ear bones. Most members of the group, as with most Mesozoic mammals, are only known from fragmentary tooth and jaw remains. The taxonomic composition of the group is contested. Aside from the uncontroversial Dryolestidae and the possibly paraphyletic Paurodontidae, which were small insectivores, known from the Middle Jurassic to Early Cretaceous of Laurasia, the Meridiolestida, a diverse group of mammals including both small insectivores and mid-large sized herbivores known from the Late Cretaceous to Miocene of South America and possibly Antarctica, are also often included. However, in many phylogenetic analyses, Meridiolestida are recovered as an unrelated group of cladothe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic
The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined. By the beginning of the Jurassi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Otto Dietrich
Wilhelm Otto Dietrich (30 July 1881 – 26 March 1964) was a German (later East German) paleontologist who took a special interest in the study of Tertiary and Quaternary mammals. He was a curator of paleontology at the Natural History Museum, Berlin. Dietrich was born in Senden near Ulm to mill manager Otto and Maria née Kramer. After studying at the Ulm gymnasium he joined the Technical University at Stuttgart before transferring to the University of Tübingen in 1901. He studied geology and paleontology and received a doctorate in 1903 under Ernst Koken. He studied petrology at Freburg and then worked from 1904 as an assistant to Ernst Anton Wülfing in Danzig. He developed otosclerosis in 1907 and had to move to Switzerland for treatment but he progressively lost hearing and became completely deaf. He became an assistant at Stuttgart under Eberhard Fraas and joined an excavation at Steinheim-on-Murr where the dig discovered a giant deer and a mammoth (''Elephas primigenius'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brancatherulum
''Brancatherulum'' is an extinct genus of Late Jurassic (Kimmeridgian - Tithonian) mammal from the Tendaguru Formation of Lindi Region of Tanzania. It is based on a single toothless dentary 21 mm in length. It is currently considered either a stem- zatherian or dryolestidan. See also * Prehistoric mammal This is an incomplete list of prehistoric mammals. It does not include extant mammals or recently extinct mammals. For extinct primate species, see: list of fossil primates.Mikko's Phylogeny Archiv Mammaliaformes ' *Genus †'' Adelobasileus ... ** List of prehistoric mammals References Cladotheria Late Jurassic mammals Jurassic mammals of Africa Fossil taxa described in 1927 Tendaguru fauna Prehistoric mammal genera {{jurassic-mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paurodontidae
Paurodontidae is a family of Late Jurassic to Early Cretaceous mammals in the order Dryolestida. Remains of paurodontids have been found in the United States, Britain, Portugal, and Tanzania. The group likely represents a paraphyletic group of basal non dryolestid dryolestidans. '' Paurodon'' has been suggested to have been a specilast feeder on earthworms due to the morphology of its teeth closely resembling that of the golden mole genus ''Amblysomus ''Amblysomus'' (also narrow-headed golden mole or South African golden mole) is a genus of the golden mole family, Chrysochloridae, comprising five species of the small, insect-eating, burrowing mammals endemic to Southern Africa. All five spec ...''.A.O. Averianov and T. Martin (2015). "Ontogeny and taxonomy of Paurodon valens (Mammalia, Cladotheria) from the Upper Jurassic Morrison Formation of USA" (PDF). Proceedings of the Zoological Institute of the Russian Academy of Sciences 319 (3): 326–340. References Dryolestida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donodon
''Donodon'' is an extinct genus of mammal from the Ksar Metlili Formation of Talssint, Morocco, which has been dated to the Late Jurassic to Early Cretaceous epochs ( Tithonian–Berriasian ages). The type species ''D. prescriptoris'' was described in 1991 by the palaeontologist Denise Sigogneau-Russell. A second species, ''D. minor'', was named in 2022. ''Donodon'' was a member of Cladotheria, a group that includes therian mammals (marsupials and placentals) and some of their closest relatives. It differed from dryolestids in having upper molars that were not compressed mesiodistally. Some studies have suggested that it was closely related to various South American cladotherians in the clade Meridiolestida, with specific similarities to '' Mesungulatum'', a herbivorous mesungulatid Mesungulatidae is an extinct clade of meridiolestidan dryolestoid mammals from the Late Cretaceous of South America and possibly other Gondwannan landmasses. They are particularly notable for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donodontidae
Cladotheria is a clade (sometimes ranked as a legion) of mammals. It contains modern therian mammals (marsupials and placentals) and several extinct groups, such as the dryolestoids, amphitheriids and peramurids. The clade was named in 1975 by Malcolm McKenna. In 2002, it was defined as a node-based taxon containing "the common ancestor of dryolestids and living therians, plus all its descendants". A different, stem-based definition was given in 2013, in which Cladotheria contains all taxa that are closer to ''Mus musculus'' (the house mouse) than to the "symmetrodont" '' Spalacotherium tricuspidens''. Description Early cladotherians can be distinguished from other mammals by a number of derived traits (apomorphies). Their teeth differed from those of the "symmetrodonts" by the evolution of a talonid shelf ( hypoflexid) on the lower molars, which occluded with the paracone of the corresponding upper molars. A true talonid basin, allowing for the crushing and grinding of f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brandoniidae
Dryolestidae is an extinct family of Mesozoic mammals, known from the Middle Jurassic to the Early Cretaceous of the North Hemisphere. The oldest known member, '' Anthracolestes'', is known from the Middle Jurassic Itat Formation of Western Siberia, but most other representatives are known from the Late Jurassic of North America and the Late Jurassic and Early Cretaceous of Europe. Most members are only known from isolated teeth and jaw fragments. Like many other groups of early mammals, they are though to have been insectivores. They are generally classified in Cladotheria, meaning that they are considered to be more closely related to marsupials and placentals than to monotremes. They are placed as part of the broader Dryolestida, which also includes the (possibly paraphyletic) Paurodontidae, and also sometimes the South American-Antarctic Meridiolestida, which are often considered unrelated cladotherians. Dyolestidae is not based on a phylogenetic definition, but instead on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
