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Microvenator
''Microvenator'' (meaning "small hunter") is a genus of dinosaur from the Early Cretaceous Cloverly Formation in what is now south central Montana. ''Microvenator'' was an oviraptorosaurian theropod. The holotype fossil is an incomplete skeleton, most likely a juvenile, with a living length of about 1.2 m. The adult size of ''Microvenator'' is estimated to be closer to 3 m long. ''Microvenator celer'' is primitive and may be the "sister taxon to all other oviraptorosaurs."〔
Barnum Brown collected the type specimen (AMNH 3041) of this animal in 1933 and included what are now known to be ''Deinonychus'' teeth with the specimen, and thought that his new animal had a small body with an unusually large head. Thus, he informally dubbed it "Megadontosaurus" ("big-toothed lizard"). He had illustrations made of it, but never published the name, a fate shared with several other Cloverly dinosaurs (''Deinonychus'', ''Sauropelta'' and ''Tenontosaurus''). AMNH 3041 includes parts of the skull. hand, foot, left fibula, 23 vertebrae, 4 ribs, and fairly complete ilia, pubes, femora, tibiae, the left ankle, left humerus, radius, and ulna. In 1970 John Ostrom described the type specimen and gave it its formal name. Ostrom also referred a single tooth from the Yale Peabody Museum collection, YPM 5366, to this new species.〔Ostrom (1970).〕 The illustrations that Brown had prepared were finally published in a detailed and exhaustive monograph by Mackovicky and Sues in 1998. They were unable to confirm that YPM 5366 belongs to ''Microvenator''. They confirmed that ''Microvenator'' is an oviraptorosaurian, and that it is the earliest known member of this group from North America.〔Mackovicky and Sues (1998).〕
==See also==
* Timeline of oviraptorosaur research
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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