トラギス科魚類ヤマユリトラギス（新称）Parapercis kentingensis の日本における記録

抄録

Two sandperches, Parapercis kentingnesis Ho, Chang and Shao, 2012 and Parapercis shaoi Randall, 2008 (Pinguipedidae), are extremely similar to each other, having overlapping meristic values and eight red-orange bars on the body below the midlateral line. Although the species have been considered to co-occur in southern Japan, examination of the single paratype of P. shaoi from Amami-oshima Island, Kagoshima Prefecture confirmed its identity as P. kentingensis. Because the Amami-oshima Island specimen is the only known example of “P. shaoi” from Japan, the Japanese record of that species is now considered erroneous. A description, including morphological variations, of 14 Japanese examples of P. kentingensis (including the above paratype of P. shaoi) is provided and comparisons made with related species. Parapercis kentingensis is distinguishable from other congeners by the following combination of characters: eight brown blotches dorsolaterally on body; dark brown dots (size similar to exposed area of scale) lining lower edge of aforementioned blotches; a large brownish elliptical blotch on upper edge of opercle; an oblique yellow bar fringed with red-orange below eye; one to four small red spots on cheek; three longitudinal rows of small reddish-brown spots on dorsal fin; four or five vertical rows of small red-orange spots on caudal fin; lateral-line scales 52–54; three pairs of canine teeth anteriorly on lower jaw; palatine edentate; a single semi-circular row of stout teeth on vomer; posterior edge of preopercle smooth; upper tip of caudal fin slightly elongated; tip of pelvic fin not reaching to anal-fin origin. Because some Japanese specimens lacked small reddish-orange spots anterior to the pectoral-fin base, that characteristic can no longer be considered diagnostic of P. kentingensis.