Xenarthra - Wikipedia
Xenarthra (/ z ɛ ˈ n ɑːr θ r ə /; from Ancient Greek ξένος, xénos, "foreign, alien" + ἄρθρον, árthron, "joint") is a major clade of placental mammals native to the Americas. There are 31 living species: the anteaters, tree sloths, and armadillos. [1] Extinct xenarthrans include the glyptodonts, pampatheres and ground sloths.
异关节总目 - 维基百科，自由的百科全书
異關節總目 （學名： Xenarthra），又称 貧齒總目。. 是现存最原始的 真兽类，保存真兽类原始特征和独特的特征如脊柱后部的 胸椎 和 腰椎 上有附加 关节。. 由于从真兽诞生的初期就已经分化了出去，其成员之间差异较大，成员包括少数有鳞甲的 犰狳，行动最 ...
贫齿目 - 百度百科
贫齿目又称异关节目（Xenarthra），哺乳类动物原始真兽类之一，是现存最古老的真兽类，保存真兽类独特的原始特征如脊柱后部的胸椎和腰椎上有附加关节。贫齿目和较多哺乳动物相差都很远，近亲极少。已灭绝的成员包括雕齿兽和大懒兽 megatherium 等。部分书籍 ...
Xenarthra Facts & Pictures: Meet The Armadillos, Anteaters
2019年8月25日 · Xenarthra is the animal group which includes the sloths, armadillos and anteaters. The xenarthrans originated in South America around 59 million years ago. Although at one time xenarthrans were found throughout the Americas, today only one xenarthran, the nine-banded armadillo, is found as far north as the United States.
Xenarthran | Sloths, Armadillos & Anteaters | Britannica
Xenarthran, (magnorder Xenarthra), an ancient lineage of mammals comprising the armadillos (order Cingulata) and the sloths and anteaters (order Pilosa). The namesake feature shared by all members of Xenarthra is seen in the lower backbone. The lumbar vertebrae are “xenarthrous”; that is, they have.
Xenarthrans - IUCN SSC Anteater, Sloth and Armadillo Specialist …
Xenarthrans. Often elusive and supremely challenging to study, many xenarthran species are virtually unknown in the wild — yet the extensive degradation of habitats throughout South and Central America has caused sharp declines in virtually every xenarthran population. Apart from being among the most unusual of Neotropical creatures, the ...
Why do Xenarthrans matter? | Journal of Mammalogy - Oxford …
2015年6月24日 · Xenarthrans possess a suite of characteristics that make them among the most unusual of mammals. Understanding the functional significance of these traits is one prominent reason why xenarthrans matter. In addition, Xenarthra is currently considered one of the basal clades of placental mammals, and the only one to originate in South America.
Species | IUCN SSC Anteater, Sloth and Armadillo ... - xenarthrans
THE XENARTHRANS. There are seven sloth species, ten anteater species, and 22 armadillo species. The total number of extant species of xenarthrans may be surprising to many readers, as it was lower only a few years ago.
Superorder Xenarthra – The Mammal Lab
September 21, 2021. Brown-throated sloth (Bradypus variegatus) Superorder Xenarthra includes the armadillos, sloths, and anteaters, which have a strange set of shared characteristics. Their relationship with Afrotheria and Boreoeutheria has long been debated but recent studies suggest they are sister to Afrotheria, diverging about 84 million ...
Xenarthra – Journal of the IUCN/SSC Anteater, Sloth and …
Xenarthra is the only periodical dedicated to publishing scientific articles and reports on different subjects regarding the conservation and natural history of xenarthrans—among the least known of all mammal groups, and notoriously difficult to study in the wild.