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Palaeonictis
''Palaeonictis'' ("ancient weasel") is an extinct predatory mammal belonging to the family Oxyaenidae, existing from the late Paleocene to the early Eocene in Europe and North America. Description In life, it would have resembled a large modern wolverine. This oxyaenid had heavy jaws and blunt robust teeth more suited for crushing bones, than slicing meat. This meant that the plantigrade ''Palaeonictis'' was at least a part-time scavenger. The biggest species, ''Palaeonictis peloria'' (meaning "terrible ancient weasel") is known from an incomplete jaw that must have measured over in length. This animal was the largest carnivore in its ecosystem. , ''P. occidentalis'' (the size of a bear) evolved into the smaller ''P. wingi'' (the size of a coyote) within 200,000 years in the early Eocene due to global warming (paleoclimatology). By the end of the early Eocene (), ''Palaeonictis'' disappeared from North America, and by the early Eocene () the last species of ''P. gigantea'' ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeonictinae
Palaeonictinae ("ancient weasels") is a extinct subfamily of oxyaenids from the late Paleocene to early Eocene of Europe and North America. Classification and phylogeny Taxonomy * Subfamily: †Palaeonictinae (Denison, 1938) ** Genus: †'' Ambloctonus'' (Cope, 1875) *** †''Ambloctonus major'' (Denison, 1938) *** †''Ambloctonus priscus'' (Matthew & Granger, 1915) *** †''Ambloctonus sinosus'' (Cope, 1875) ** Genus: †'' Dipsalodon'' (Jepsen, 1930) paraphyletic.html" ;"title="'paraphyletic">'paraphyletic genus''*** †''Dipsalodon churchillorum'' (Rose, 1981) *** †''Dipsalodon matthewi'' (Jepsen, 1930) ** Genus: †''Palaeonictis'' (de Blainville, 1842) *** †''Palaeonictis gigantea'' (de Blainville, 1842) *** †''Palaeonictis occidentalis'' (Osborn, 1892) *** †''Palaeonictis peloria'' (Rose, 1981) *** †''Palaeonictis wingi'' (Chester, 2010) Phylogeny The phylogenetic relationships of the subfamily Palaeonictinae are shown in the following cladogram:F. Solé, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxyaenidae
Oxyaenidae ("sharp hyenas") is a family of extinct carnivorous placental mammals. Traditionally classified in order Creodonta, this group is now classified in its own order Oxyaenodonta ("sharp tooth hyenas") within clade Pan-Carnivora in mirorder Ferae. The group contains four subfamilies comprising fourteen genera. Oxyaenids were the first to appear during the late Paleocene in North America, while smaller radiations of oxyaenids in Europe and Asia occurred during the Eocene. Etymology The name of order Oxyaenodonta comes , name of hyena genus ''Hyaena'' and . The name of family Oxyaenidae comes , name of hyena genus ''Hyaena'' and taxonomic suffix ":wikt:-idae#Suffix, -idae". Description They were superficially cat-like mammals that plantigrade, walked on flat feet, in contrast to modern cats, which digitigrade, walk and run on their toes. Anatomically, characteristic features include a short, broad skull, deep jaws, and teeth designed for crushing rather than shearing, as in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene
The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by Chicxulub impact, an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene First Appearances
The Paleocene, ( ) or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Paleocene, the continents of the Northern Hemisphere were still connected via s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene Mammals Of North America
The Paleocene, ( ) or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Paleocene, the continents of the Northern Hemisphere were still connected via so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene Mammals Of North America
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene Mammals Of Europe
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal Classification
Mammalia is a class of animal within the phylum Chordata. Mammal classification has been through several iterations since Carl Linnaeus initially defined the class. No classification system is universally accepted; McKenna & Bell (1997) and Wilson & Reader (2005) provide useful recent compendiums. Many earlier ideas from Linnaeus et al. have been completely abandoned by modern taxonomists, among these are the idea that bats are related to birds or that humans represent a group outside of other living things. Competing ideas about the relationships of mammal orders do persist and are currently in development. Most significantly in recent years, cladistic thinking has led to an effort to ensure that all taxonomic designations represent monophyletic groups. The field has also seen a recent surge in interest and modification due to the results of molecular phylogenetics. George Gaylord Simpson's classic "Principles of Classification and a Classification of Mammals" ( Simpson, 1945) ta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machaeroidinae
Machaeroidinae ("dagger-like") is a Family (biology), subfamily of extinct carnivorous Saber-toothed cat, sabre-toothed Placentalia, placental mammals from Asia and North America.Malcolm C. McKenna, Susan K. Bell: ''Classification of Mammals: Above the Species Level'' in Columbia University Press, New York (1997), 631 Seiten. Traditionally classified as Hyaenodonta, hyaenodonts, this group is now classified as a member of the family Oxyaenidae. Classification and phylogeny Taxonomy * Subfamily: †Machaeroidinae (Matthew, 1909) ** Genus: †''Apataelurus'' (Scott, 1937) *** †''Apataelurus kayi'' (Scott, 1937) *** †''Apataelurus pishigouensis'' (Tong & Lei, 1986) ** Genus: †''Diegoaelurus'' (Zack, Poust & Wagner, 2022) *** ''Diegoaelurus vanvalkenburghae'' (Zack, Poust & Wagner, 2022) ** Genus: †''Isphanatherium'' (Lavrov & Averianov, 1998) *** ''Isphanatherium ferganensis'' (Lavrov & Averianov, 1998) ** Genus: †''Machaeroides'' (Matthew, 1909) *** †''Machaeroides eot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxyaeninae
Oxyaeninae ("sharp hyenas") is a extinct subfamily of oxyaenids from the late Paleocene to late Eocene of Asia, Europe and North America.Malcolm C. McKenna, Susan K. Bell: ''Classification of Mammals: Above the Species Level'' in Columbia University Press, New York (1997), 631 Seiten. Etymology The name of the subfamily translates as "sharp hyaenas" (, name of hyena genus '' Hyaena'' and taxonomic suffix " -inae"). Classification and phylogeny Taxonomy * Subfamily: †Oxyaeninae (Cope, 1877) ** Genus: †'' Argillotherium'' (Davies, 1884) *** †''Argillotherium toliapicum'' (Davies, 1884) ** Genus: †'' Dipsalidictis'' (Matthew & Granger, 1915) paraphyletic.html" ;"title="'paraphyletic">'paraphyletic genus''*** †''Dipsalidictis aequidens'' (Matthew & Granger, 1915) *** †''Dipsalidictis krausei'' (Gunnell & Gingerich, 1991) *** †''Dipsalidictis platypus'' (Matthew & Granger, 1915) *** †''Dipsalidictis transiens'' (Matthew & Granger, 1915) ** Genus: †''Malfelis' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
