Atlantogenata ("born around the Atlantic Ocean")[2] is a proposed clade (magnorder) of placental mammals containing the cohorts or superorders Xenarthra and Afrotheria.

[1] These groups originated and radiated in the South American and African continents, respectively, presumably in the Cretaceous.

[5] 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: Afrotheria, Boreoeutheria, and Xenarthra.

[6][7] Xenarthra Afrotheria Laurasiatheria Euarchontoglires Below shows the phylogeny of the extant atlantogenate families.

Dasypodidae Chlamyphoridae Cyclopedidae Myrmecophagidae Bradypodidae Choloepodidae Procaviidae Trichechidae Dugongidae Elephantidae Orycteropodidae Macroscelididae Chrysochloridae Tenrecidae Potamogalidae