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Mei (dinosaur)
''Mei'' (from Chinese 寐 mèi ''to sleep soundly'') is a genus of duck-sized troodontid dinosaur first unearthed by paleontologists in Liaoning, China in 2004. ''Mei'' lived during the Early Cretaceous Period. The binomial name of its only species, ''Mei long'' (Chinese 寐 mèi and 龍 lóng) means ''sleeping dragon''.
==Description==
''Mei'' is a troodontid, a group of small, bird-like, gracile maniraptorans. All troodontids have many unique features of the skull, such as closely spaced teeth in the lower jaw, and large numbers of teeth. Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian encephalization quotients, meaning they were behaviourally advanced and had keen senses. The type fossil is a young juvenile about long, complete and exceptionally well preserved in three-dimensional detail, with the snout nestled beneath one of the forelimbs and the legs neatly folded beneath the body, similar to the roosting position of modern birds. This posture provides another behavioral link between birds and dinosaurs. The chemistry of the matrix stone and the resting pose indicate the living animal was probably buried instantly in volcanic ash. A second specimen, DNHM D2154, was also preserved in a sleeping posture.
''Mei'' is notable as a distinct species of troodontid based on several unique features, including extremely large nares. It is most closely related to the troodontid ''Sinovenator'', which places it near the base of the troodontid family.〔
As a basal troodontid, unlike advanced troodontids, it has a bird like hip structure shared with many advanced maniraptorans.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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