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| Bythaelurus naylori ： ウィキペディア英語版 |
Dusky snout catshark
''Bythaelurus naylori'', also known as the Dusky snout catshark is a catshark of the family Scyliorhinidae. This species is found from the Southwest Indian Ridge, southwestern
Indian Ocean. The specimens were collected from 89–1,443 m depth in both bottom trawls and midwater trawls. The shallowest catch record of the new species, possibly at 89 m, came from a midwater trawl. This species can be distinguished from its two closest congeners, ''B. giddingsi'' and ''B. lutarius'', by a combination of prominent comb-like dermal denticles along the upper caudal-fin margin, absence of oral papillae, uniform body coloration, and noticeable dark dusky snout; ''Bythaelurus giddingsi'' has oral papillae present and a variegated color pattern, while ''B. lutarius'' lacks a caudal crest of enlarged denticles and matures at a much smaller size than the new species.
==References==
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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