Coelorinchus fuscigulus Iwamoto, Ho, and Shao, 2009

Coelorinchus fuscigulus Iwamoto, Ho, and Shao, 2009:40–45, figs. 1–2 (holotype ASIZP 70169, 74.8 mm HL, 322 mm TL; NET, Da-xi, 24.94°N, 121.9°E; 9 paratypes NET and East China Sea) .

Coelorinchus cylindricus (non Iwamoto and Merrett, 1997): Shao et al., 2008: table 2 (listed, 1 spec. NET, 400–600 m) .

MATERIAL EXAMINED.— All type specimens as listed in original description (Iwamoto et al., 2009). ASIZP 70169 (holotype, 74.8 HL, 322 TL), Da-xi,); ASIZP 63249 (1, paratype, 56.1 HL, 233 TL), Da-xi; ASIZP 66922 (1, paratype, 66.2 HL, 286 TL), CP 248, 536 m; ASIZP 66973 (1, paratype, 72.7 HL, 293 TL), Nan-fang-ao; ASIZP 70168 (1, paratype, 77.1 HL, 301+ TL), Da-xi; CAS 228337 (2 paratypes, ex. ASIZP 70168, 66.9–74.1 HL, 302+-285+ TL), Da-xi; CAS 228338 (1, paratype, 66.9 HL, 266 TL), Nan-fang-ao; East China Sea: ASIZP 63193 (1, paratype, 52.2 HL, 228 TL) and CAS 224492 (1, paratype, ex. ASIZP 63193, 45.4 HL, 190 TL), Diao-yu-tai Archipelago, Yilan, Taiwan .

DISTINGUISHING FEATURES.— 1D II, 8–9; P i16–i18; GR-I (inner) 7–9 total; scales below midbase 1D 5.5–6.5, below 2D 6.5–7.5; pyl.caeca 19–24. Snout produced and sharply pointed, length 36–41% HL, 1.4–1.7 times orbit; anterolateral margin of snout incompletely supported by bone; orbit 24–25% HL, upper jaw 26–30% HL. Nasal fossa scaled ventrally; underside of head naked except for overlapping scales on anterolateral snout margin; body scales with small, sharp spinules arranged in 10–13 parallel rows. Light organ Group IV of Iwamoto (1990); anterior fossa near isthmus, posterior before anus, no black stripe connecting the two. Rays of 2D well developed, about equal to opposite rays of anal fin. Overall color medium brown to grayish, but in fresh specimens silvery on ventral sides of head and trunk (bluish in preserved specimens); 8–11 prominent saddles on body; fins dusky to blackish; lips and jaws pale; branchiostegal region blackish. Attains at least 322 mm TL.

DISTRIBUTIONs.— Known only from NET and East China Sea in Diaoyutai Archipelago, Taiwan, in approximately 600 m.

REMARKS.— Coelorinchus fuscigulus was previously confused with C. cylindricus, a species known only from the holotype taken off New Caledonia, but that species has a complete bony support of the anterorlateral snout margin. Among the Taiwan members of the genus, C. fuscigulus is most similar to C. brevirostris, C. cingulatus, and C. hubbsi . The body markings easily distinguish the species from C. brevirostris and C. hubbsi; the blackish branchiostegals that contrast strongly with the pale gular membrane, the fully blackish 1D, and lack of an elongated 1D spinous ray distinguish it from C. cingulatus .