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Laurasiatheria
Fossil range: Late Cretaceous - Recent
Giant golden-crowned flying fox (Acerodon jubatus)
Scientific classification
Kingdom: Animalia
Class: Mammalia
Subclass: Theria
Infraclass: Eutheria
Magnorder: Boreoeutheria
Superorder: Laurasiatheria
Waddell et al. 1999 [1]
Orders

Laurasiatheria is a large group of placental mammals. It includes bats, whales, most hoofed mammals, and carnivorans, among other mammals.

Contents

Classification and phylogeny

Laurasiatheria was discovered on the basis of the similar gene sequences shared by the mammals belonging to it. No anatomical features have yet been found that unite the group. Laurasiatheria is a clade usually discussed without a Linnaean rank, but has been assigned the rank of cohort or magnorder, and superorder. The Laurasiatheria clade is based on DNA sequence analyses and retrotransposon presence/absence data. The name comes from the theory that these mammals evolved on the supercontinent of Laurasia, after it split from Gondwana when Pangaea broke up. It is a sister group to Euarchontoglires (Supraprimates) and Afrotheria. It includes the following extant orders:

Within the Laurasiatheria, the Erinaceomorpha appears (surprisingly) to be the most divergent branch. Some studies link the Perissodactyla and Ferae in a clade Zooamata; others link Perissodactyla and Cetartiodactyla in a clade of true ungulates[citation needed]. Neither clade is well supported[citation needed].

Laurasiatheria is also posited to include several extinct orders and superorders:

Cladogram

   Laurasiatheria   

 Eulipotyphla


   Ferungulata   
   Pegasoferae   

 Chiroptera


   Zooamata   
   Ferae   

 Carnivora



 Pholidota




 Perissodactyla    





 Cetartiodactyla




References

  1. ^ Waddell, Peter J., Okada, Norihiro, & Hasegawa, Masami (1999). "Towards resolving the interordinal relationships of placental mammals". Systematic Biology 48 (1): 1–5. doi:10.1093/sysbio/48.1.1. http://www.deer.rr.ualberta.ca/library/taxonomy/reading.pdf. Retrieved 2009-10-26. 
  • William J. Murphy, Eduardo Eizirik, Mark S. Springer et al., Resolution of the Early Placental Mammal Radiation Using Bayesian Phylogenetics,Science, Vol 294, Issue 5550, 2348-2351, 14 December 2001.
  • Jan Ole Kriegs, Gennady Churakov, Martin Kiefmann, Ursula Jordan, Juergen Brosius, Juergen Schmitz. (2006) Retroposed Elements as Archives for the Evolutionary History of Placental Mammals. PLoS Biol 4(4): e91.[1] (pdf version)
  • Kitazoe Y, Kishino H, Waddell PJ, Nakajima N, Okabayashi T, et al. (2007) "Robust Time Estimation Reconciles Views of the Antiquity of Placental Mammals." PLoS ONE 2(4): e384. doi:10.1371/journal.pone.0000384

Look also

External links

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Wiktionary

Up to date as of January 14, 2010

Definition from Wiktionary, a free dictionary

Contents

Translingual

Etymology

Proper noun

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Wikipedia

Laurasiatheria

  1. (taxonomy) A taxonomic superorder within the subclass Eutheria — the carnivores, whales, bats, horses, pangolins, etc.
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Wikispecies

See also


Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Taxonavigation

Main Page
Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Mammalia
Subclassis: Theria
Infraclassis: Placentalia
Superordo: Laurasiatheria
Ordines: Artiodactyla - Carnivora - Cetacea - Chiroptera - †Cimolesta - †Condylarthra - †Creodonta - Insectivora - †Mesonychia - Perissodactyla - Pholidota

Name

Laurasiatheria Gill, 1872

Vernacular names

English: Laurasiatheres
日本語: ローラシア獣上目
Português: Laurasiatérios
Русский: Лавразиотерии
Українська: Лавразіотерії
中文: 勞亞獸總目

Simple English

Laurasiatheria
Fossil range: Late Cretaceous - Recent
File:Golden crowned fruit
Giant golden-crowned flying fox (Acerodon jubatus)
Scientific classification
Kingdom: Animalia
Class: Mammalia
Infraclass: Eutheria
Superorder: Laurasiatheria
Waddell et al., 1999
Orders

Laurasiatheria is a mammal group, with species put together based on DNA analysis. The name comes from the thinking that these mammals evolved on the supercontinent of Laurasia, after it split from Gondwana when Pangaea broke up. It includes these extant orders:

Look up Laurasiatheria in Wikispecies, a directory of species



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