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''Navajodactylus'' (meaning "Navajo finger") is an extinct genus of pterosaur from Late Cretaceous (late Campanian stage) deposits of San Juan Basin, New Mexico and Alberta, Canada. The holotype specimen was discovered and collected by oceanographer Arjan C. Boeré from the Kirtland Formation in 2002. ''Navajodactylus'' was first named by Robert M. Sullivan and Denver W. Fowler in 2011 and the type species is ''Navajodactylus boerei''. The generic name honors the Navajo Nation, combining their name with a Greek δάκτυλος, ''daktylos'', "finger". The specific name honors Arjan C. Boeré. ''Navajodactylus'' is based on the holotype SMP VP-1445, from the Hunter Wash Member of the Kirtland Formation, San Juan Basin, dating to the upper Campanian, about 75 million years old. It consists of three pieces of the first phalanx of the wing finger. The paratype is SMP VP-1853, an ulna fragment. Two other first phalanges were referred: TMP 72.1.1 and TMP 82.19.295, from the Dinosaur Park Formation of the Dinosaur Provincial Park, Alberta.〔 ''Navajodactylus'' was a medium-sized pterosaur, with an estimated wingspan of 3.5 meters (11.5 ft). Its autapomorphies largely exist in the unique form of the process on the first wing phalanx for the extensor tendon.〔 ''Navajodactylus'' was tentatively assigned to the Azhdarchidae, because of its geological age as it does not show any synapomorphies of the group.〔 Indeed, it may not actually be an azhdarchid, as it lacks pneumacy in its forelimb elements, as opposed to the extensive pneumacy seen in azhdarchids.〔Wilton, Mark P. (2013). Pterosaurs: Natural History, Evolution, Anatomy. Princeton University Press. ISBN 0691150613.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Navajodactylus」の詳細全文を読む スポンサード リンク
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