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Washakie Formation
The Washakie Formation is a geologic formation in northern Colorado and southern Wyoming. It preserves many mammal, bird, reptile and other fossils dating back to the Lutetian stage of the Eocene within the Paleogene period. The sediments fall in the Bridgerian and Uintan stages of the NALMA classification.Washakie Formation at .org Fossil content The Washakie Formation has provided many fossil mammals, turtles and other reptiles, birds and other fossils. The |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyaenodontidae
Hyaenodontidae ("hyena teeth") is a family of extinct predatory mammals from extinct superfamily Hyaenodontoidea within extinct order Hyaenodonta. 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. (1985): ''The Field Guide to Prehistoric Life.'' Facts on File Publications, New York. Classification and phylogeny Taxonomy * Family: †Hyaenodontidae ** Genus: †'' Boritia'' *** †''Boritia duffaudi'' ** Genus: †'' Neosinopa'' *** †''Neosinopa gobiensis'' ** Genus: †'' Praecodens'' *** †''Praecodens acutus'' ** Genus: †'' Preregidens'' *** †''Preregidens langebadrae'' ** Genus: †'' Protoproviverra'' *** †''Protoproviverra palaeonictides'' ** (unranked): †''Cynohyaenodon''/''Quercytherium'' clade *** Genus: †'' Cynohyaenodon'' (paraphyletic genus) **** †''Cynohyaenodon cayluxi'' **** †''Cynohyaenodon lautricensis'' **** †''Cynohyae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnivoraformes
Carnivoraformes ("carnivoran-like forms") is a clade of placental mammals that includes the modern order Carnivora and its extinct stem-relatives. Classification and phylogeny Classification In 2010 Flynn, Finarelli & Spaulding named a new clade Carnivoraformes within Carnivoramorpha, containing carnivorans and "miacids" but not viverravids. The authors defined Carnivoraformes as the clade containing Carnivora and all taxa that are more closely related to Carnivora (represented by ''Canis lupus'') than to viverravids (represented by '' Viverravus gracilis''). * ''Clade'': Carnivoraformes ** Order: Carnivora (carnivorans) *** Suborder: Caniformia ("dog-like" carnivorans) *** Suborder: Feliformia ("cat-like" carnivorans) ** Family: † Quercygalidae ** (unranked): †''Gracilocyon''/''Oodectes'' clade *** Genus: †'' Eogale'' *** Genus: †''Gracilocyon''(paraphyletic genus) *** Genus: †''Oodectes''(paraphyletic genus) *** Genus: †''Paramiacis'' *** Genus: †''Paroode ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferae
Ferae ( , , "wild beasts") is a mirorder of placental mammalsMalcolm C. McKenna, Susan K. Bell: ''Classification of Mammals: Above the Species Level'' in Columbia University Press, New York (1997), 631 Seiten. that groups together clades Pan-Carnivora and Pholidotamorpha. The Ferae is a sister group to the clade Pan-Euungulata and together they make grandorder Ferungulata. Classification and phylogeny Taxonomy : Phylogeny The phylogenetic relationships of mirorder Ferae are shown in the following cladogram, reconstructed from mitochondrial and nuclear DNA and protein characters, as well as the fossil record.O’Leary, M. A., Bloch JI, Flynn, J. J., Gaudin, T. J., Giallombardo, A., Giannini, N. P., Goldber, S. L, Kraatz, B. P., Luo, Z-X, Jin Meng, Xijun Ni, Novacek, M. J., Perini, F. A., Randall, Z. S., Rougier, G. W., Sargis, E. J., Silcox, M. T., Simmons, N. B., Spaulding, M. Velazco, P. M., Weksler, M., Wible, J. R. Cirranello, A. L. (2013."The Placental Mammal Ancestor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylinodon Mirus
''Stylinodon'' is an extinct genus of taeniodont mammal, and is the best known, and last genus of taeniodonts, lived some 45 million years ago during middle Eocene in North America. The skull suggests it had a blunt face, and a very short snout. Species ranged in size from pigs to leopards, reached a body mass of up to . Its canines had developed into huge, incisor-like root-less teeth. ''Stylinodons molars were covered in enamel and continued growing throughout its life. Most likely, it fed on rough roots and tubers. References External linksPhotograph of skull at Utah Field House of Natural History Museum, at Vernal, Utah Vernal, the county seat and largest city in Uintah County is in northeastern Utah, approximately east of Salt Lake City and west of the Colorado border. As of the 2010 census, the city population was 9,089. The population has since grown to ... Cimolestans Eocene mammals of North America Fossil taxa described in 1874 Prehistoric mammal g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taeniodonta
Taeniodonta ("banded teeth") is an extinct early group of cimolestid mammals known from the Maastrichtian to the Eocene. Taeniodonts evolved quickly into highly specialized digging animals, and varied greatly in size, from rat-sized to species as large as a bear. Later species developed prominent front teeth and huge claws for digging and rooting. Some genera, like '' Stylinodon'', had ever-growing teeth. Two families belong to this group, Stylinodontidae and Conoryctidae. They were endemic to North America. The scarcity of taeniodont fossils can be explained by the fact that these animals probably lived in dry or arid climates unconductive to fossilization. Taeniodonts are unambiguously Eutheria Eutheria (; from Greek , 'good, right' and , 'beast'; ) is the clade consisting of all therian mammals that are more closely related to placentals than to marsupials. Eutherians are distinguished from noneutherians by various phenotypic t ...ns, and part of Cimolesta; '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stylinodon
''Stylinodon'' is an extinct genus of taeniodont mammal, and is the best known, and last genus of taeniodonts, lived some 45 million years ago during middle Eocene in North America. The skull suggests it had a blunt face, and a very short snout. Species ranged in size from pigs to leopards, reached a body mass of up to . Its canines had developed into huge, incisor-like root-less teeth. ''Stylinodons molars were covered in enamel and continued growing throughout its life. Most likely, it fed on rough roots and tubers. References External linksPhotograph of skull at Utah Field House of Natural History Museum, at Vernal, Utah Vernal, the county seat and largest city in Uintah County is in northeastern Utah, approximately east of Salt Lake City and west of the Colorado border. As of the 2010 census, the city population was 9,089. The population has since grown to ... Cimolestans Eocene mammals of North America Fossil taxa described in 1874 Prehistoric mammal g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cimolesta
Cimolesta is an extinct order of non-placental eutherian mammals. Cimolestans had a wide variety of body shapes, dentition and lifestyles, though the majority of them were small to medium-sized general mammals that bore superficial resemblances to rodents, lagomorphs, mustelids, and marsupials. Several groups have previously been suggested to have descended from the Cimolesta: the Pholidota (which would have been regarded as a suborder of Cimolesta), the Creodonta, and the Carnivora. The origins of the enigmatic Dinocerata have been suggested to lie within the Cimolesta as well. However, recent studies have revealed that cimolestans are more likely to be basal, non-placental eutherians, with no living descendants. Some experts had placed the pangolins within Cimolesta, though the current consensus is that the pangolins should be placed within their own order, Pholidota, as a sister taxon to Carnivora within Ferae. Some have also placed the enigmatic family Ptolemaiidae within C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2020 In Mammal Paleontology
This paleomammalogy list records new fossil mammal taxa that were described during the year 2020, as well as notes other significant paleomammalogy discoveries and events which occurred during the year. Afrotherians Proboscidea Proboscidea research * A study on dietary differences among Pleistocene proboscideans in North America, and their implications for the knowledge of the causes of extinction of ''Cuvieronius'', is published by Smith & DeSantis (2020). * Evidence of dietary resource partitioning among three proboscidean taxa from the early Pliocene locality of Langebaanweg in South Africa ('' Anancus capensis'', ''Mammuthus subplanifrons'' and '' Loxodonta cookei'') is presented by Groenewald ''et al.'' (2020). * A study on the morphology of teeth and mandible of ''"Serridentinus" gobiensis'' and '' Miomastodon tongxinensis'', as well as on the phylogenetic affinities of these taxa, is published by Wang, Zhang & Li (2020), who reestablish ''Miomastodon'' as a genus distinct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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