Coelorhinchus hexafasciatus Okamura, 1982

Iwamoto, Tomio, Nakayama, Naohide, Shao, Kwang-Tsao & Table, Hsuan-Ching Ho, 2015, Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan, Proceedings of the California Academy of Sciences 62 (3), pp. 31-126 : 56

Coelorhinchus hexafasciatus Okamura, 1982

Figure 6 .

Coelorhynchus hexafasciatus Okamura in Okamura, Amaoka and Mitani, 1982:173, pl. 104 (Holotype: BSKU 30443; Kyushu-Palau Ridge, 26°45.0ʹN, 135°19.0ʹE, 336 m; 31 paratypes from Kyushu-Palau Ridge) .

MATERIAL EXAMINED.— ASIZP 71202 (1, 133.3 mm HL, 494+ mm TL), Da-xi.

DISTINGUISHING FEATURES.— 1D II,9; P i17–18; V 7; GR-I (inner) 8; GR-II (outer/inner) 7/9; scale rows below 1D origin 7.5, below midbase 1D 5.5, below 2D origin 6. Snout conical, 40% HL; terminal scute rather blunt; anterolateral margin of snout incompletely support by bone; orbit 23% HL, 1.8 in snout length; mouth large, upper jaw 31% HL; posterior end of rictus scarcely restricted by a lip fold. Premaxillary teeth arranged in wide tapered band; outer series distinctly enlarged. Light organ restricted as a short naked streak before anus. Underside of head completely naked except for lower preopercle; nasal fossa scaled ventrally. Body scales large, adhered, covered with keel-like spinules in 7 widely divergent rows. Second spinous ray of 1D not elongated; 2D poorly developed throughout its length. About 6 dark saddles dorsally on trunk and tail; gill membrane blackish posteriorly; fins generally dark, but outer V ray somewhat paler. Attains at least 70 cm TL.

DISTRIBUTIONs.— Known from the Kyushu-Palau Ridge, s. Japan, and the East China Sea off Taiwan, in about 340–1320 m.

REMARKS.— This species may be confused with C. sheni (known only from Taiwan), but the two are readily distinguished by squamation on the head (underside of head mostly naked in C. hexafasciatus vs. completely scaled in C. sheni ). The specimen herein reported represents the first record of the species from Taiwanese waters. The species was originally described from the Kyushu-Palau Ridge, but no additional specimens had been reported after the original description.

Figures

FIGURE 6. Coelorinchus hexafasciatus Okamura, 1982. ASIZP 71202, 494+ TL, preserved. Photograph by N. Nakayama.