Search results
Results from the WOW.Com Content Network
The smallest members of this group are the marsupial mice, which often reach only 5 centimetres (2.0 in) in body length. Some species resemble placentals and are examples of convergent evolution. This convergence is evident in both brain evolution [10] and behaviour. [11]
Modern marsupials are now understood to be an originally South American lineage that later reached Australia and diversified there in a massive adaptive radiation. [1] [2] Molecular data, including analysis of retrotransposon insertion sites in the nuclear DNA of a variety of marsupials, and the fossil evidence indicate that Ameridelphia might best be understood as an evolutionary grade.
Nambaroo occurs in fossil formations from the Bullock Creek fauna, which are found in freshwater limestone of the Camfield beds. [5] Other balbarids have been found in Riversleigh and Alcoota fossil deposits. [6] Another family that dates back to this era is the Hypsiprymnodontidae, which includes the two subfamilies Propleopinae and ...
All extant marsupials are endemic to Australasia and the Americas. A distinctive characteristic common to most of these species is that the young are carried in a pouch. Well-known marsupials include kangaroos, wallabies, koalas, opossums, wombats, Tasmanian devils, and the extinct thylacine.
Paucituberculata / ˌ p ɔː s ɪ tj uː ˌ b ɜːr k j uː ˈ l eɪ t ə / is an order of South American marsupials.Although currently represented only by the seven living species of shrew opossums, this order was formerly much more diverse, with more than 60 extinct species named from the fossil record, particularly from the late Oligocene to early Miocene epochs.
Figure 1:In mammals, the quadrate and articular bones are small and part of the middle ear; the lower jaw consists only of dentary bone.. While living mammal species can be identified by the presence of milk-producing mammary glands in the females, other features are required when classifying fossils, because mammary glands and other soft-tissue features are not visible in fossils.
To a section: This is a redirect from a topic that does not have its own page to a section of a page on the subject. For redirects to embedded anchors on a page, use {{R to anchor}} instead.
Analysis of retrotransposon insertion sites in the nuclear DNA of a variety of marsupials has shown that the South American monito del monte's lineage is the most basal of the superorder. [ 3 ] [ 4 ] The Australian australidelphians form a clade , for which the name Euaustralidelphia ("true Australidelphia") has been proposed (the branching ...