| 词条 | Younginiformes |
| 释义 |
| fossil_range = Permian-Triassic | image = Hovasaurus_BW.jpg | image_caption = Hovasaurus. | regnum = Animalia | phylum = Chordata | classis = Sauropsida | subclassis = Diapsida | unranked_ordo = ? Neodiapsida | ordo = Eosuchia (defunct) | superfamilia = Younginiformes | subdivision_ranks = Subgroups | subdivision = †Tangasauridae †Younginidae }} Younginiformes is a replacement name for the taxon Eosuchia, proposed by Alfred Romer in 1947. The Eosuchia having become rather a dustbin for many probably distantly-related primitive diapsid reptiles ranging from the late Carboniferous to the Eocene, Romer proposed that this be replaced by Younginiformes, to include the Younginidae and a very few similar families, ranging from the Permian to the Triassic. Younginiformes (including Acerosodontosaurus, Hovasaurus, Kenyasaurus, Tangasaurus, Thadeosaurus, Youngina, et alia sensu Currie and other researchers in the 1980s) is probably not a clade. It appears to represent a grade of South African Permo-Triassic diapsids that are not more closely related to each other as a whole than they are to other reptiles.[1] A cladistic analysis by Laurin and Pineiro (2017) recovers Parareptilia as not only part of Diapsida, but also sister to Younginiformes.[2] References1. ^{{cite journal |last=Bickelmann |first= |last2=Müller |first2= |last3=Reisz |first3= |year=2009 |title=The enigmatic diapsid Acerosodontosaurus piveteaui (Reptilia: Neodiapsida) from the Upper Permian of Madagascar and the paraphyly of “younginiform” reptiles |journal=Canadian Journal of Earth Sciences |volume=46 |issue=9 |pages=651–661 |doi=10.1139/E09-038 }} 2. ^{{cite journal |first=Michel |last=Laurin |first2=Graciela H. |last2=Piñeiro |title=A Reassessment of the Taxonomic Position of Mesosaurs, and a Surprising Phylogeny of Early Amniotes |journal=Front. Earth Sci. |volume=5 |pages=88 |year=2017 |doi=10.3389/feart.2017.00088 }}
4 : Permian reptiles|Triassic diapsids|Permian first appearances|Triassic extinctions |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。