Coelorinchus leptorhinus Chiou, Shao and Iwamoto 2004
Creators: name: Iwamoto, Tomio
name: Nakayama, Naohide
name: Shao, Kwang-Tsao
name: Table, Hsuan-Ching Ho
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Gadiformes
Macrouridae
Coelorinchus
Coelorinchus leptorhinus

description: Coelorinchus leptorhinus Chiou, Shao and Iwamoto, 2004
Caelorinchus leptorhinus Chiou, Shao and Iwamoto, 2004a:299, figs. 1–3 (holotype, ASIZP 061344 and 23 paratypes, Da-xi, ne. Taiwan, 24°54.63ʹN, 122°03.49ʹE, 400–600 m).
Coelorinchus leptorhinus: Shao et al., 2008: table 2 (23 spec., NET, SWT, 100–650 m).
MATERIAL EXAMINED (54 spec.).— NET: ASZIP 58636 (1, 146 TL), Da-xi; ASIZP 58648 (2, 285–311 TL), Da-xi; ASIZP 60246 (1, 192 TL), Da-xi; ASIZP 60247 (1, 310 TL), Da-xi; ASIZP 61344 (1, holotype, 800 TL), Da-xi; ASIZP 61345 (1, paratype, 380 TL), Da-xi; ASIZP 61346 (10, paratype, 142–176 TL), Da-xi; ASIZP 61347 (2, paratypes, 480–640 TL), Da-xi; ASIZP 64288 (1, 400 m, 146 TL), Da-xi; ASIZP 65569 (1, 567 TL), Da-xi; ASZIP 65571 (1, 407 TL), Da-xi; ASIZP 65642 (1, 370 TL), KSD sta.4; ASZIP 65646 (1, 230+ TL), Da-xi; ASZIP 65647 (1, 308 TL), KSD sta.4; ASZIP 65649 (1, 261 TL), KSD sta.; ASIZP 65781 (1, 346 TL), Da-xi; ASIZP 66253 (1, 352 TL), Da-xi; ASIZP 66917 (2, 212–224 TL), CP 248, 526 m; ASIZP 66939 (1, 133 TL),Da-xi; ASIZP 70214 (2, 334–394 TL), Da-xi; ASIZP 70252 (1, 147 TL), Da-xi; ASIZP 70692 (18, 200–375 TL), Da-xi. SWT: ASIZP 66405 (1, 240 TL), Dong-gang; ASIZP 65628 (1, 546 TL), CD 233, 448– 526 m.
DISTINGUISHING FEATURES.— 1D II, 8–9; P i17–i18; GR-I (inner) 6–8 total; scales below midbase 1D 5.5–7.5, below 2D 5.5–7.5; pyl.caeca 42–48. Snout long, narrow, pointed in lateral view, tip rounded, length 39–46% HL, anterolateral margin of snout completely supported by bone; orbit 16–19% HL; upper jaw 26–29% HL. Nasal fossa scaly, underside of snout naked, but finely scaled posteriorly on head; spinules on body scales in 5–8 sharp, slightly divergent ridge rows. Light organ short, Group II of Iwamoto (in Cohen et al. 1990); anus removed from A origin. Ground color brown, bluish on belly and halfway onto chest; underside of head, mouth, and gill cavities dark; fins generally dusky to blackish. Attains more than 850 mm TL.
DISTRIBUTION.— Apparently endemic to Taiwan (NET, SWT, SCS). The species is most abundant in 300–400 m off s. Taiwan and 400–800 m in ne. Taiwan.
REMARKS.— Shen et al.’s (1993) record of C. tokensis was a misidentification of C. leptorhinus. The species is abundant in the bycatch of the deepwater trawl fisheries off Da-xi (NET). It is most closely similar to the Philippines species C. macrorhynchus Smith and Radcliffe, 1912 in having a notably long snout, long jaws, relatively long barbel, and similar light organ. The main differences between the two species lie in C. leptorhinus having the underside of snout naked and having a slightly shorter snout (preoral length 35–40% HL cf 40–45%).
description: Published as part of Iwamoto, Tomio, Nakayama, Naohide, Shao, Kwang-Tsao & Table, Hsuan-Ching Ho, 2015, Synopsis of the Grenadier Fishes (Gadiformes; Teleostei) of Taiwan, pp. 31-126 in Proceedings of the California Academy of Sciences 62 (3) on pages 59-60, DOI: 10.5281/zenodo.11512126