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__NOTOC__ ''Argyropelecus'' is an oceanic ray-finned fish genus which belongs in the family Sternoptychidae. A collective name is "silver hatchetfishes", but this can also refer to a species of the freshwater hatchetfishes which are not particularly closely related but merely convergent. The large pupils of these marine hatchetfishes enable them to see dim objects in the deep sea, where light barely penetrates. == Species == There are currently seven recognized species in this genus: * ''Argyropelecus aculeatus'' Valenciennes, 1850 (Lovely Hatchetfish, Atlantic Silver Hatchetfish) * ''Argyropelecus affinis'' Garman, 1899 (Pacific Hatchetfish) * ''Argyropelecus gigas'' Norman, 1930 (Giant Hatchetfish, Greater Silver Hatchetfish) * ''Argyropelecus hemigymnus'' Cocco, 1829 (Half-naked Hatchetfish, Short Silver Hatchetfish, Spurred Hatchetfish) * ''Argyropelecus lychnus'' Garman, 1899 (Tropical Hatchetfish) * ''Argyropelecus olfersi'' (G. Cuvier, 1829) * ''Argyropelecus sladeni'' Regan, 1908 (Sladen's Hatchetfish, Silvery Hatchetfish) Fossils of this genus show that they have existed at least since the mid-late Eocene, about 40 million years ago.〔 (2002): (). ''In:'' A compendium of fossil marine animal genera. ''Bulletin of American Paleontology'' 364: 560. (HTML database excerpt )〕 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「Argyropelecus」の詳細全文を読む スポンサード リンク
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