Meridiungulata is a clade with the rank of cohort or super-order, containing the South-American ungulates: Pyrotheria, Astrapotheria, Notoungulata and Litopterna. Meridiungulata may have originated in South America from a North American condylarth ancestor, and they may be members of the clade Laurasiatheria, related to other ungulates including artiodactyls and perissodactyls.

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  • Meridiungulata is a clade with the rank of cohort or super-order, containing the South-American ungulates: Pyrotheria, Astrapotheria, Notoungulata and Litopterna. Meridiungulata may have originated in South America from a North American condylarth ancestor, and they may be members of the clade Laurasiatheria, related to other ungulates including artiodactyls and perissodactyls. It is, however, entirely possible the Meridiungulata are actually part of a different macro-group of placental mammals called Atlantogenata. Much of the evolution of meridiungulates occurred in isolation from other ungulates, a great example of convergent evolution. However, the argument that meridiungulates are related to artiodactyls and perissodactyls will remain tenuous unless DNA is found to confirm this relationship. Some paleontologists have also challenged the monophyly of Meridiungulata by suggesting that pyrotheres may be more closely related to other mammals such as Embrithopoda (an African order that may be related to elephants) than to other South American ungulates. Most litopterns and notoungulates died out following the invasion of South America by North American ungulates and predators during the Great American Interchange; a few species from both orders survived until the end-Pleistocene extinctions.
  • Litopterna Notoungulata Astrapotheria Pyrotheria Xenungulata } Die Südamerikanischen Huftiere (Meridiungulata) sind eine Gruppe ausgestorbener Säugetiere, die während weiter Teile des Känozoikums in Südamerika lebten und erst im Pleistozän ausstarben.
  • Els meridiungulats (Meridiungulata) són un superordre de mamífers ungulats sud-americans extingits. Les seves relacions amb altres tipus d'ungulats, com ara els artiodàctils o perissodàctils, no estan gens clares, i fins hi tot hi ha hagut científics que han posat en dubte que es tracti d'un superordre monofilètic. Mentre no es trobi ADN per analitzar-lo, és probable que romangui la incertesa.
  • Los meridiungulados (Meridiungulata, "ungulados meridionales") son un superorden extinto de mamíferos placentarios originarios de Sudamérica, donde evolucionaron independientemente en dicha isla-continente. Se conocen a menudo como los ungulados sudamericanos. Muchos eran de gran tamaño y predominantemente americanos, pero la mayoría de especies eran de tamaño mediano o pequeño y algunas se desarrollaron también en Asia, donde se supone que se extendieron durante un tiempo con éxito, ya que se han hallado restos en Mongolia, y la Antártida hasta su enfriamiento. Varias especies de litopternos y notoungulados sobrevivieron al Pleistoceno y fueron contemporaneas del hombre.
  • I meridiungulati (Meridiungulata) sono un grande gruppo di mammiferi placentali dalle caratteristiche primitive, sviluppatisi in isolamento nel solo Sudamerica all'inizio del Terziario, quando il continente era separato dal Nordamerica.
  • 南蹄目（Meridiungulata）是南美洲有蹄類的一個分支，可能是屬於勞亞獸總目，其下包括焦獸目、閃獸目、南方有蹄目及滑距骨目。牠們可能是源自於北美洲的踝節目祖先，並在南美洲植根，與奇蹄目及偶蹄目有關。大部份南蹄目都是獨立於其他有蹄類進行演化，是趨同演化的一個例子。但是，一些古生物學家質疑南蹄目是否單系群，並指焦獸目與其他哺乳動物，如重腳目，比南美洲的有蹄類更為接近。
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  • Toxodon platensis
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  • 240px
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  • Meridiungulata
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  • Orders
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  • †Meridiungulata
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  • Meridiungulata is a clade with the rank of cohort or super-order, containing the South-American ungulates: Pyrotheria, Astrapotheria, Notoungulata and Litopterna. Meridiungulata may have originated in South America from a North American condylarth ancestor, and they may be members of the clade Laurasiatheria, related to other ungulates including artiodactyls and perissodactyls.
  • Litopterna Notoungulata Astrapotheria Pyrotheria Xenungulata } Die Südamerikanischen Huftiere (Meridiungulata) sind eine Gruppe ausgestorbener Säugetiere, die während weiter Teile des Känozoikums in Südamerika lebten und erst im Pleistozän ausstarben.
  • Els meridiungulats (Meridiungulata) són un superordre de mamífers ungulats sud-americans extingits. Les seves relacions amb altres tipus d'ungulats, com ara els artiodàctils o perissodàctils, no estan gens clares, i fins hi tot hi ha hagut científics que han posat en dubte que es tracti d'un superordre monofilètic. Mentre no es trobi ADN per analitzar-lo, és probable que romangui la incertesa.
  • Los meridiungulados (Meridiungulata, "ungulados meridionales") son un superorden extinto de mamíferos placentarios originarios de Sudamérica, donde evolucionaron independientemente en dicha isla-continente. Se conocen a menudo como los ungulados sudamericanos.
  • I meridiungulati (Meridiungulata) sono un grande gruppo di mammiferi placentali dalle caratteristiche primitive, sviluppatisi in isolamento nel solo Sudamerica all'inizio del Terziario, quando il continente era separato dal Nordamerica.
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  • Meridiungulata
  • Südamerikanische Huftiere
  • Meridiungulat
  • Meridiungulata
  • Meridiungulata
  • 南蹄目
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  • Meridiungulata
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