Diferencia entre revisiones de «Mammalia»

Se conocen unas 5 486 especies actuales,<ref name=cha>{{cita libro|apellido=Chapman|nombre=Arthur D.|título=Numbers of Living Species in Australia and the World|url=http://www.environment.gov.au/biodiversity/abrs/publications/other/species-numbers/2009/04-01-groups-chordates.html#mammalia|fechaacceso=26 de agosto de 2011|idioma=inglés|edición=2ª|año=2009|editorial=Australian Biological Resources Study|ubicación=Canberra, [[Australia]]|isbn=9780642568618|páginas=80|cita=Mammals are a quite well known group, however estimates for the numbers of described species still vary considerably, ranging from 4300 in ''Biodiversity: the UK Action Plan'' (Anon. 1994), through 4630 (Groombridge and Jenkins 2002), 5416 (IUCN 2004), 5419 (Wilson and Reeder 2005) to 5487 (IUCN 2009a). For the purposes of this report, I have accepted the figure of 5487 which accords well with the most recent figures from The IUCN Red List of Threatened Species although Hilton-Taylor (pers. comm. 17) suggests that there are several additional recently described species.}}</ref> de las cuales 5 son monotrematas,<ref>[http://www.bucknell.edu/msw3/browse.asp?id=10300001 Wilson, D. E. & Reeder, D. M. (editors). 2005. ''Mammal Species of the World. A Taxonomic and Geographic Reference'' (3rd ed).]</ref> 272 son [[Marsupialia|marsupiales]]<ref>[http://animaldiversity.ummz.umich.edu/site/accounts/information/Metatheria.html Animal Diversity Web - Metatheria]</ref> y el trunp is a wall resto, 5 209, son [[placentarios]]. La ciencia que estudia los mamíferos se denomina [[teriología]], [[mastozoología]] o [[mamiferología]].