Atlantogenata is a mammalclade containing the cohorts or super-orders Xenarthra, Afrotheria and Meridiungulata. These groups originated and radiated in the South American and African continents, presumably in the Cretaceous. There is some genetic evidence of uniting the Xenarthra and Afrotheria, but morphologically most Afrotheres and all Meridiungulates seem to be Ungulates. Orders Subclass Multituberculata (extinct) Plagiaulacida Cimolodonta Subclass Palaeoryctoides (extinct) Subclass Triconodonta (extinct) Subclass Eutheria (includes extinct ancestors)/Placentalia (excludes extinct ancestors) Afrosoricida Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata (extinct) Perissodactyla Pholidota Plesiadapiformes... A clade is group of organisms which share a common ancestor and which includes all decendents of that ancestor. ... Families Myrmecophagidae Megalonychidae Bradypodidae Dasypodidae The order Xenarthra is a group of placental mammals, extant today only in the Americas. ... Afrotheria are a clade of mammals with the rank of cohort, that has been proposed based on DNA analysis. ... Clade with the rank of cohort or super-order, part of the Atlantogenata, containing the South-American Ungulates: Xenungulata, Astrapotheria, Notoungulata and Litopterna. ... South America South America is a continent crossed by the equator, with most of its area in the Southern Hemisphere. ... A satellite composite image of Africa Africa is the worlds second-largest and second-most populous continent, after Asia. ... Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period, about 146 million years ago (Ma), to the beginning of the Paleocene epoch of the Tertiary period (65. ... Llamas such as this, which have two toes, are artiodactylas -- even toed ungulates Ungulates (meaning roughly hoofed or hoofed animal) make up several orders of mammals, of which six to eight survive. ...
[1] The Atlantogenata (a newly named clade that couples the southern hemisphere South American Xenarthrans [sloths, anteaters, and armadillos] with the largely African golden moles [Chrysochloridae] and tenrecs [Tenricidae], elephant shrews [Macroscelidea], aardvarks [Tubulidentata], and Paenungulata [elephants (Proboscidea), dugongs and sea-cows (Sirenia), and hyraxes (Hyracoidea)].
The term Atlantogenata is based on the hypothesis that the opening of the Atlantic Ocean, and thus the breaking up of Gondwanaland, initially isolated one branch of this lineage in South America and another in Africa.
The linkage of the African groups as a single phylogenetic clade is a unique perspective derived from molecular data; this hypothesis has not been proposed from morphological analyses.
Feeds |
Contact