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Bathyraja mariposa
''Bathyraja mariposa'', sometimes referred to as the butterfly skate〔
〕 is a species of skate found in the Aleutian islands. It is overall a medium-brown color, lacks thorns on the disc and has indistinct thorns on the tail. It was discovered in 2002 during a National Marine Fisheries Service survey, and first described in 2004. The holotype specimen is held at the University of Washington. Its species name "mariposa" derives from the Spanish word for butterfly, although several other species are sometimes referred to as the "butterfly skate."〔
==Description==
''B. mariposa'' is a medium sized skate relative to other Alaska skates, measuring approximately 0.76 meters total length. It has a lengthy snout and moderately long tail and lacks a pseudosiphon in the claspers. It is morphologically similar to two other Alaskan skates, ''Bathyraja violacea'' and ''Rhinoraja taranetzi'', but can be distinguished based on coloration patterns. ''B. mariposa'' is green-brown on the dorsal side of the disc, with small dark brown or black blotches on disc and tail. Large yellowish blotches usually appear on the surface of the pectoral fins. The dorsal surface of the disc has uniformly dense coverage of dermal denticles.〔
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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