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''Laccognathus embryi'' is an extinct species of porolepiform lobe-finned fish recovered from Ellesmere Island, Canada. It existed during the Frasnian age of the Late Devonian epoch (around 385.3 to 374.5 mya). ==Discovery== Specimens from at least 22 individuals of ''Laccognathus embryi'' were recovered from the Fram Formation of Ellesmere Island, Nunavut, Canada from 2000 to 2008 in the Nunavut Paleontological Expeditions. The expeditions were led by Jason P. Downs, Edward Daeschler, Farish Jenkins, Jr., and Neil Shubin, and previously resulted in the discovery of the tetrapodomorph ''Tiktaalik roseae'' from the same locality. Ellesmere Island was also the site of previous Norwegian scientific expeditions by the ship ''Fram'' in 1893-1896 by Fridtjof Nansen and in 1898–1902 by Otto Sverdrup. In the second expedition, a few vertebrate fossils were collected from Ellesmere Island by a member of Sverdrup's crew, the geologist Per Schei. The collection included a few porolepiform scales attributed to ''Glyptolepis'' and ''Holoptychius''.〔 Prior to its discovery, the genus ''Laccognathus'' was known only from Latvia and Russia. ''L. embryi'' is the first member of the genus discovered in North America.〔 The fossil sarcopterygian fish ''Laccognathus embryi'' of the Devonian was named in honour of Geologist Ashton F. Embry. 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「Laccognathus embryi」の詳細全文を読む スポンサード リンク
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