WebExafroplacentalia places Xenarthra as a sister group to the Boreoeutheria (comprising Laurasiatheria and Euarchontoglires ), [4] thus making Afrotheria a primitive group of placental mammals (the group name roughly means "those which are not African placentals"). Classification [ edit] Epitherians comprise all the placental mammals except the Xenarthra. They are primarily characterized by having a stirrup-shaped stapes in the middle ear, which allows for passage of a blood vessel. This is in contrast to the column-shaped stapes found in marsupials, monotremes, and xenarthrans. They are also characterized by having a shorter fibula relative to the tibia.
Boreoeutheria - an overview ScienceDirect Topics
WebEpitheria. taxon author. Malcolm McKenna. year of taxon publication. 1975. 0 references. taxon rank. magnorder. 1 reference. stated in. Classification of Mammals Above the Species Level. parent taxon. Placentalia. 1 reference. stated in. Classification of Mammals Above the Species Level. topic's main category. Web全兽类 ( 學名 : Holotheria )是一个多样化的 哺乳动物 群体,是 孔奈兽 (英语:Kuehneotherium) 和 兽亚纲 最后一个共同祖先的后代 (包括 有袋动物 和 胎盘动物 )。. [1] 全兽类 [2] 化石时期: 三叠纪晚期 (英语:Late Triassic) - 全新世, 220–0 Ma. PreЄ. thread legal case management
Palaeos Vertebrates Eutheria
WebMonophyly of Epitheria has been challenged by molecular phylogenetic studies (Springer et al., 2004), but Kriegs et al., 2006, and Svartman et al. 2006 found evidence for the clade based on a set of retroposon s shared by all its members (presence/absence data). WebJan 3, 1996 · Novacek and co-workers recognized a monophyletic clade Epitheria, comprising all eutherians except edentates and the extinct palaeoryctoids, on the basis … Webto the base of the eutherian tree and the term Epitheria has been coined for all eutherians except Xenarthra (14) or, alternatively, all eutherians except Xenarthra and Pholidota. Thus, the positions of Xenarthra and Pholidota are fundamental to the discussion of eutherian evolution. Xenarthra is currently represented by a single thread-leaved brodiaea habitat