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Astyanax pelecus : ウィキペディア英語版
Astyanax pelecus

''Astyanax pelecus'' is a species of fish. It can be distinguished from its cogenerate species by: its body depth (26.7-34.8% of its standard length); its short and pointed snout smaller than the orbital diameter; and a reduced number of branched anal fin rays. ''A. pelecus'' also differs from members of its genus by its characteristic color pattern. It possesses a single humeral spot that is constricted to the region above the lateral line; at the same time it shows a conspicuous midlateral body stripe from opercle to the caudal fin base, an autapomorphy of this precise species. Most other ''Astyanax'' species have a humeral spot that is vertically or horizontally elongate and have the midlateral stripe becoming faint near that humeral spot. The species name is derived from the Greek ''pelekus'', meaning "axe", referring to the pigmentation shape resulting from the adjoinment of the humeral spot with the midlateral stripe.
==Description==


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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