Atlantogenata

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Atlantogenata
Temporal range: Paleocene - Recent
Serengeti Elefantenbulle.jpg
African bush elephant (Afrotheria)
Myresluger2.jpg
Giant anteater (Xenarthra)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Clade: Eutheria
Clade: Atlantogenata
Superorders and Orders


See text for more details

Atlantogenata is a proposed clade of mammals containing the cohorts or superorders Afrotheria and Xenarthra. These groups originated and radiated in the South American and African continents, presumably in the Cretaceous. Together with Boreoeutheria, they make up Eutheria. The monophyly of this grouping was supported by some genetic evidence.[1][2]

Alternative hypotheses are that Boreoeutheria and Afrotheria combine to form Epitheria (as generally supported by anatomical and other physiological evidence) or that Boreoeutheria and Xenarthra combine to form Exafroplacentalia or Notolegia.[3]

Updated analysis of transposable element insertions around the time of divergence strongly supports the fourth hypothesis of a near-concomitant origin (trifurcation) of the three superorders of mammals.[4][5]

Eutheria  
Boreoeutheria

Euarchontoglires

Laurasiatheria

  Atlantogenata  

Xenarthra

Afrotheria  

Below shows the phylogeny of the extant atlantogenate families.

Atlantogenata
Xenarthra
Cingulata

Dasypodidae

Chlamyphoridae

Pilosa
Vermilingua

Cyclopedidae

Myrmecophagidae

Folivora

Bradypodidae

Megalonychidae

Afrotheria
Afroinsectiphilia
Tubulidentata

Orycteropodidae

Afroinsectivora
Macroscelidea

Macroscelididae

Afrosoricida

Chrysochloridae

Tenrecidae

Paenungulata
Hyracoidea

Procaviidae

Tethytheria
Proboscidea

Elephantidae

Sirenia

Dugongidae

Trichechidae

References[edit]

  1. ^ Waddell, Peter J.; Okada, Norohiro; Hasegawa, Masami (1999). "Towards Resolving the Interordinal Relationships of Placental Mammals". Systematic Biology. 48 (1): 1–5. doi:10.1093/sysbio/48.1.1. PMID 12078634. 
  2. ^ Murphy, W.J.; Pringle, T.H.; Crider, T.A.; Springer, M.S.; Miller, W. (2007). "Using genomic data to unravel the root of the placental mammal phylogeny". Genome Research. 17: 413–421. doi:10.1101/gr.5918807. PMC 1832088Freely accessible. PMID 17322288. 
  3. ^ Wildman, Derek E.; Chen, Caoyi; Erez, Offer; Grossman, Lawrence I.; Goodman, Morris; Romero, Roberto (2006). "Evolution of the mammalian placenta revealed by phylogenetic analysis". Proceedings of the National Academy of Sciences. 103 (9): 3203–3208. doi:10.1073/pnas.0511344103. PMC 1413940Freely accessible. PMID 16492730. 
  4. ^ Nishihara, H.; Maruyama, S.; Okada, N. (2009). "Retroposon analysis and recent geological data suggest near-simultaneous divergence of the three superorders of mammals". Proceedings of the National Academy of Sciences. 106 (13): 5235. doi:10.1073/pnas.0809297106. PMC 2655268Freely accessible. PMID 19286970. 
  5. ^ Churakov, G.; Kriegs, J. O.; Baertsch, R.; Zemann, A.; Brosius, J. R.; Schmitz, J. R. (2009). "Mosaic retroposon insertion patterns in placental mammals". Genome Research. 19 (5): 868–875. doi:10.1101/gr.090647.108. PMC 2675975Freely accessible. PMID 19261842. 

Further reading[edit]