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24(1)_Chromis katoi

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SINGLE PAPER

Volume 24, Issue 1 – 05 June 2018

Hiroki Iwatsubo and Hiroyuki Motomura: Chromis katoi, a new species of damselfish from the Izu Islands, Japan, with a key to species in the Chromis notata species complex (Perciforms: Pomacentridae), pp. 27-34

 

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SINGLE PAPER

Volume 24, Issue 1 – 05 June 2018

Hiroki Iwatsubo and Hiroyuki Motomura: Chromis katoi, a new species of damselfish from the Izu Islands, Japan, with a key to species in the Chromis notata species complex (Perciforms: Pomacentridae), pp. 27-34

Abstract

Chromis katoi n. sp., a new damselfish (Pomacentridae) belonging to the Chromis notata species complex, is described on the basis of 11 specimens collected at a depth of 18 m off Hachijo Island, Izu Islands, Japan. The new species is similar to C. notata in having an indistinct white blotch at the end of the dorsal-fin base, and 4 or 5 and 11 or 12 scale rows above and below the lateral line, respectively, but differs in having the spinous portion of the dorsal fin yellowish in adults (vs. entire dorsal fin brownish in the latter), the caudal fin dusky yellow in adults (vs. each caudal-fin lobe with a broad horizontal dark band), the body entirely yellow in juveniles (vs. grayish to brownish throughout life), fewer dorsal-fin soft rays, more tubed lateral-line scales, pectoral-fin rays and gill rakers, and greater body depth and pre-anal-fin length. A key to species in the C. notata species complex is provided.