Английская Википедия:Hadrocodium

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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

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Phylogeny [12]

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See also

References

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Bibliography

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External links

Шаблон:Wikispecies

Шаблон:Cynodontia Шаблон:Taxonbar


Шаблон:Paleo-therapsid-stub