Coelorinchus divergens Okamura and Yatou, 1984

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 : 53-54

publication ID

https://doi.org/ 10.5281/zenodo.11512126

DOI

https://doi.org/10.5281/zenodo.12715488

persistent identifier

https://treatment.plazi.org/id/039F87BD-FFCC-1149-AB64-E2DAFE94FCD3

treatment provided by

Felipe

scientific name

Coelorinchus divergens Okamura and Yatou, 1984
status

 

Coelorinchus divergens Okamura and Yatou, 1984 View in CoL

Figures 5A–C View FIGURE .

Coelorincus divergens Okamura and Yatou in Okamura and Kitajima, 1984:236–239 (holotype, BSKU 26865 View Materials , Okinawa Trough [ East China Sea ] sw. of Kyushu , Japan, 1000 m; paratype, BSKU 33464 View Materials , Okinawa Trough , 780–810 m).— Shao et al., 2008: table 2 (15 spec., NET, SCS, SWT, 646–1110 m; first record from Taiwan).

MATERIAL EXAMINED (17 spec.).— NET: ASIZP 64145 View Materials (1, 280+ TL), CP 235, 764 m ; ASIZP 65575 View Materials (1, 286 TL), Da-xi ; ASIZP 65577 View Materials (1, 245 TL), CP 196, 646– 787 m. SWT: ASIZP 63799 View Materials (1, 338 TL), CD 193, 821 m ; ASIZP 65538 View Materials (1, 330 TL), CD 141, 985– 1110 m . SCS: ASIZP 66084 View Materials (1, 74 HL, 212+ TL) , ASIZP 66788 View Materials (2, 260+-295+ TL), and ASIZP 66838 View Materials (1, 166+ TL), CD 321, 954 m ; ASIZP 66752 View Materials (5, 225+-350+ TL) and CAS 224888 About CAS , ex ASIZP 66752 View Materials (2, 323+-385+ TL), CD 320, 731 m. Other specimens: ASIZP 68052 View Materials (1, 398 TL), Aurora, 944–1004 m .

DISTINGUISHING FEATURES.— 1D II, 7–8; P i17–i18; GR-I (inner) 8(total); scales below midbase 1D 4–5, below 2D 4.5–5.5; lateral line scales over distance equal to pre-1D length 30–31; pyl.caeca 9–11. Snout broadly spade-shaped (viewed dorsally), sharply pointed, length 38–45% HL, terminal scute relatively small but pointed, anterolateral margin snout incompletely supported by bone; orbit 24–28(32)% HL, 1.4– 1.8 in snout; interorbital 23–27%, postorbital 32–39%, orbit-preopercle 34–37%, upper jaw 26–31%, barbel 8–14%; preanal length 161–163%; height 1D 48–49%; length P 41–42%; isthmus to A 38–40%. Nasal fossa sparsely scaled anteroventrally; scales atop head with 2–5 crestlike rows of spinules in parallel to slightly divergent rows; scales on underside of head with broad, high spinules aligned in one (rarely 2) crestlike row; body scales large, thick, adherent, spinules in about 5 divergent ridgelike rows, middle row enlarged, spinule rows flanking middle row much lower, incomplete, not reaching scale margin. Light organ short, narrow, Group II. Ground color in alcohol brownish or grayish; fins dark or dusky; mouth, gill cavities, branchiostegal membranes, and jaws blackish. Attains at least 40 cm TL.

DISTRIBUTION.— Known from East China Sea, Taiwan, and South China Sea in 646–1110 m.

REMARKS.— Our specimens (as reported by Shao et al. 2008) represent the first record of the species from Taiwan and the South China Sea. According to Okamura and Yatou (in Okamura and Kitajima 1984) this species is very similar to C. parallelus Günther and C. kermadecus Jordan and Gilbert, but can be distinguished from the former in having 2–5 spinule rows (vs. single row) on scales atop head, slightly shorter snout (38–45% HL vs. 42–48% HL), and longer upper jaw (26–31% vs. 22–26%). Coelorinchus kermadecus differs from C. divergens in having 3–5 spinule rows (vs. 1 row) on scales on the underside of head, a longer snout (44–48% HL), and shorter upper jaw (23–26%).

SCS

Agriculture and Agri-Food Canada

SWT

Southwest Texas State University

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