Coelorinchus productus

discussion

REMARKS. — Coelorinchus productus has been confused with the closely similar C. anatirostris, into which Okamura (1970: 186) synonymized the species. However, Yatou (in Okamura and Kitajima, 1984: 233) treated it as distinct, and Iwamoto (1990: 130) and Nakabo (2002: 434) provided characters by which the two species could be distinguished. Chiou et al. (2004 b) used the specimens here listed to document the first record of the species in Taiwanese waters. In a recent paper, Fukui et al. (2010) re-synonymized C. productus with C. anatirostris based on examination of two specimens of the former and one of the latter, each collected in Suruga Bay. Their selected measurements and analysis of nucleotide sequences (16 S rRNA) showed the two to be the same. However, their measurements do not wholly agree with those we took from our specimens of the two species. Aside from proportional measurements, which can sometimes be misleading because of individual variation, they mention no other character used to distinguish their specimens of each species. This raises the question of whether or not they actually had specimens of C. productus (or C. anatirostris). Obviously, this problem needs furt

Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan

distribution

DISTRIBUTION. — Pacific coast of s. Japan to ne. Taiwan in 271 – 651 m.

Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan

materials_examined

MATERIAL EXAMINED (5 spec.). — NET: ASIZP 61326 (1, 296 + TL), Da-xi; ASIZP 61327 (1, 221 TL), Da-xi; ASZIP 65573 (1, 333 TL), Da-xi; ASIZP 65644 (1, 239 TL), Da-xi; ASZIP 65648 (1, 241 + TL), Da-xi. DISTINGUISHING FEATURES. — 1 D II 8 – 10; P i 16 – i 18; GR-I (inner) 6 – 8 total. Scales below midbase 1 D 3.5 – 4.5, below 2 D 4 – 6; pyl. caeca about 27. Snout sharply pointed, length 39 – 42 % HL, 1.5 – 1.7 times orbit; anterolateral margin of snout completely supported by bone; orbit 26 – 29 % HL, upper jaw 22 – 23 % HL; nasal fossa scaled ventrally; underside of head naked except for occasional small patch below preopercle angle. Light organ group II of Iwamoto (1990), fossa narrow and short, not extending to pelvic-fin bases. Spinules on body scales daggerlike in 3 – 5 slightly divergent ridgelike rows, middle row strongest. Ground color grayish-brown, silvery ventrally, bluish over abdomen becoming blackish ventrally; mouth and gill cavity blackish; fins dusky to blackish. Attains about 310 mm TL.

Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan