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Knightia
''Knightia'' is an extinct genus of clupeid clupeiform bony fish that lived in the fresh water lakes and rivers of North America during the Eocene epoch. The genus was erected by David Starr Jordan in 1907, in honor of the late University of Wyoming professor Wilbur Clinton Knight, "an indefatigable student of the paleontology of the Rocky Mountains." 〔Jordan, D. S. 1907. "The fossil fishes of California; with supplementary notes on other species of extinct fishes". Bulletin Department of Geology, University of California 5:136〕 It is the state fossil of Wyoming,〔http://soswy.state.wy.us/SecretaryDesk/StateInfo_Symbols.aspx〕 and the most commonly excavated fossil fish in the world.
==Description==
''Knightia'' belongs to the same taxonomic family as herring and sardines, and resembled the former closely enough that both ''Knightia alta'' and ''Knightia eocaena'' were originally described as species of true herring in the genus ''Clupea''.
Rows of dorsal and ventral scutes ran from the back of the head to the medial fins. They had heavy scales, and small conical teeth. Their size varied by species: ''Knightia eocaena'' was the longest, growing up to 25 centimeters (10 inches), though most specimens are no larger than 15 centimeters. ''Knightia alta'' was shorter and relatively wider, with specimens averaging between 6 and 10 centimeters.〔
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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