Английская Википедия:Hadrocodium
Шаблон:Short description Шаблон:Automatic taxobox
Hadrocodium wui is an extinct mammaliaform that lived during the Sinemurian stage of the Early Jurassic approximately Шаблон:Mya[1] in the Lufeng Formation in what is now the Yunnan province in south-western China[2] (Шаблон:Coord, paleocoordinates Шаблон:Coord).[3] It is considered as the closest relative of the class Mammalia.
The fossil of this mouse-like, paper-clip sized animal was discovered in 1985 but was then interpreted as a juvenile morganucodontid.[4] Hadrocodium remained undescribed until 2001; since then its large brain and advanced ear structure[5] have greatly influenced the interpretation of the earliest stages of mammalian evolution, as these mammalian characters could previously be traced only to some Шаблон:Mya.[6] Hadrocodium is known only from a skull Шаблон:Cvt long, and its body would have measured Шаблон:Cvt long in total and weighed up to Шаблон:Cvt, making it one of the smallest Mesozoic mammaliaforms.[1][7][8] The specimen is thought to have been that of a mature adult.[9]
The name Hadrocodium alludes to its large cranial cavity,[10] deriving from the Greek word Шаблон:Transl (Шаблон:Wikt-lang 'large, heavy, fullness')[4] and the Latin word Шаблон:Lang, from Greek Шаблон:Transl (Шаблон:Wikt-lang 'head [of a plant]').[11] The species name, wui, is the Latinized version of discoverer Xiao-Chun Wu's name.[2]
While initially suggested to have possessed a fully mammalian ear akin to those of modern mammals, a 2022 restudy suggested that it actually had a primitive mandibular middle ear similar to those of other primitive mammaliaforms.[9]
Phylogeny
- Phylogeny [12]
See also
References
Bibliography
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite journal
- Шаблон:Cite news
- Шаблон:Cite journal (Supporting online material)
External links
- Шаблон:Cite web — 3D models from CT scans of the original fossil
- Palaeocritti - a guide to prehistoric animals
Шаблон:Cynodontia Шаблон:Taxonbar
- ↑ 1,0 1,1 Шаблон:Harvnb
- ↑ 2,0 2,1 Шаблон:Harvnb
- ↑ Шаблон:Paleodb. Retrieved April 2013.
- ↑ 4,0 4,1 Шаблон:Harvnb
- ↑ Шаблон:Harvnb
- ↑ Шаблон:Harvnb
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite book
- ↑ 9,0 9,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Harvnb
- ↑ Шаблон:Cite journal
- Английская Википедия
- Prehistoric mammaliaforms
- Prehistoric cynodont genera
- Sinemurian life
- Jurassic animals of Asia
- Jurassic China
- Fossils of China
- Paleontology in Yunnan
- Fossil taxa described in 2001
- Taxa named by Zhe-Xi Luo
- Taxa named by Alfred W. Crompton
- Taxa named by Ai-Lin Sun
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