Coelorinchus brevirostris Okamura, 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 : 51-52

publication ID	https://doi.org/ 10.5281/zenodo.11512126
persistent identifier	https://treatment.plazi.org/id/039F87BD-FFCE-114B-AB64-E162FE6EFDFC
treatment provided by	Felipe
scientific name	Coelorinchus brevirostris Okamura, 1984
status

Treatment

Coelorinchus brevirostris Okamura, 1984 View in CoL

Coelorhynchus brevirostris Okamura in Okamura and Kitajima, 1984:225 (holotype, BSKU 29562; Okinawa Trough, 25°47.4ʹN, 124°23.4ʹE, 600 m.) .

Caelorinchus brevirostris View in CoL : Chiou et al., 2004b:301 (redescription, 11 spec., Taiwan).

Coelorinchus brevirostris View in CoL : Shao et al., 2008: table 2 (6 spec., NET, ET, SCS, 445–1185 m) .

MATERIAL EXAMINED (21 spec.).— NET: ASIZP 61350 View Materials (1, 175+ TL), Da-xi ; ASIZP 61351 View Materials (1, 213+ TL), Da-xi ; ASIZP 61352 View Materials (1, 144 TL), Da-xi ; ASIZP 65613 View Materials (1, 175+ TL), CP 120, 520– 640 m ; ASIZP 65518 View Materials (1, 183+ TL), 24.66°N, 122.18°E, CD 209, 508– 522 m GoogleMaps ; ASIZP 66806 View Materials (1, 44.6 HL, 163+ TL,); CP 315, 509 m ; ASIZP 66814 View Materials (4, 110–200 TL); CD 311, 516 m ; CAS 215542 View Materials (2, 51.9 HL, 215+TL); Da-xi ; CAS 228339 View Materials (1, 215+ TL); Nan-fang-ao . ET: ASIZP 65519 View Materials (1, 215 TL) and ASIZP 65615 View Materials (1, 134+ TL), CD 210, 445– 1185 m . SCS: ASIZP 65675 View Materials (1, 140+ TL), CD 311, 516 m ; ASZIP 66170 (1, 196+ TL) and ASIZP 66191 View Materials (1, 170+ TL), OCP 313, 513 m ; ASIZP 66186 View Materials (1, 194+ TL) and ASIZP 66874 View Materials (1, 92+ TL), 21.67°N, 117.72°E, CP 314, 506 m GoogleMaps ; CAS 224494 View Materials (ex ASIZP 66182 View Materials ) (1, 185 TL), 21.67°N, 117.72°E; coll. P-F Lee, 17 Aug. 2005 GoogleMaps .

DISTINGUISHING FEATURES.— 1D II 7–8; P i14–17; GR-I (inner) 6–8 (total); scales below midbase 1D 4.5–5.5, below 2D 4.5–5.5; pyl.caeca 13–16. Snout rather short, broad, and depressed, 39–44% HL; terminal scute small; anterolateral snout margin incompletely supported by bone; orbit 25–28% HL; 1.5– 1.7 in snout length; upper jaw 21–24% HL; body terete. Underside of snout and head naked; nasal fossa scaled; body scales large, with 5–8 parallel spinule rows. Second spinous ray of 1D prolonged, 1.3 times HL; rays of 2D well developed, about as long as opposite rays in A. Light organ group IV (of Iwamoto in Cohen et al. 1990), extends from anus to just behind isthmus. Body without prominent markings. Attains about 220 mm TL.

DISTRIBUTION.— East China Sea (Okinawa Trough) n. of Ishigaki Is. to sw. Taiwan in South China Sea at depths of 400–1185 m.

REMARKS.— The species was originally described from a single specimen taken in the East China Sea in 600 m, but subsequently redescribed by Chiou et al. (2004b) from 11 specimens collected from ne. Taiwan. More specimens were recently collected from the South China Sea at depths between 445 and 1185 m (see Shao et al. 2008: table 2). Our specimens agree well with the original description except that they had fewer P rays (14–17 versus 19) and a shorter barbel (16–20% of orbit versus 24.7%). However, one of us ( NN) re-examined the holotype and found P i16–i17 and barbel length 15% of orbit diameter, which is in agreement with our Taiwan specimens.

Among the Taiwan species of Coelorinchus , C. brevirostris is likely to be confused only with the recently described C. fuscigulus and C. cingulatus , but the lack of body markings distinguishes it from other members of the genus having an elevated 2D and long light organ with the anteri- or fossa just posterior to isthmus.