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Acheroraptor
''Acheroraptor'' is an extinct genus of dromaeosaurid theropod dinosaur known from the latest Maastrichtian Hell Creek Formation of Montana, USA. It contains a single species, ''Acheroraptor temertyorum''. ''A. temertyorum'' is the geologically youngest known species of dromaeosaurid.
==Discovery and naming==
''Acheroraptor'' was first described and named by David C. Evans, Derek W. Larson and Philip J. Currie in 2013 and the type species is ''Acheroraptor temertyorum''. The generic name is derived from the Greek Ἀχέρων, ''Acheron'', "underworld", in reference to the provenance from the Hell Creek Formation, and the Latin ''raptor'', "thief". The specific name honours James and Louise Temerty, the chairman of Northland Power and the ROM Board of Governors and his wife, who have supported the museum for many years.〔
''Acheroraptor'' is known from the holotype ROM 63777, a complete right maxilla with several maxillary teeth (some isolated), and from a referred dentary (lower jaw) ROM 63778, both housed at the Royal Ontario Museum, Canada. Both specimens were collected approximately four metres from one another, from the same mixed faunal bonebed that occurs in the upper part of the Hell Creek Formation of Montana, dating to the latest Maastrichtian stage of the Late Cretaceous, immediately prior to the Cretaceous–Paleogene extinction event. The holotype specimen was collected on August 28, 2009 by commercial fossil hunters, one of whom also collected the dentary several years later, and who were later able to provide detailed geographic data from GPS and photographs of the specimen ''in situ'' in the ground on the day of discovery. Both specimens were subsequently purchased by the Royal Ontario Museum from a private collector.〔
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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