Coryphaenoides rudis Günther, 1878

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 : 73

Coryphaenoides rudis Günther, 1878

Figures 11A–C .

Coryphaenoides rudis Günther, 1878:24 (lectotype BMNH 1889.12.7. 74; Pacific, n of Kermadec I., Challenger sta. 171, 600 fm [1097 m]. BMNH 1887.12.7. 75–77 (paralectotypes: 3).— Shcherbachev and Iwamoto, 1995:301 (Indian Ocean).— Iwamoto and Williams, 1999:170 (4 spec., nw. and se. Australia, 1120–1700 m).— Merrett and Iwamoto, 2000:754 (3 spec., New Caledonia region, 1315–1862 m).— Iwamoto and Graham, 2001:467 (descr., 2 spec., NSW, Australia, 1050–1150m).— Shao et al., 2008: table 2 (1 spec., SCS, 1982 m; first record from Taiwan).

Macrourus paradoxus Smith and Radcliffe in Radcliffe, 1912:115–116, pl. 25, fig. 1 (holotype, USNM 72932, 585 mm TL, e. Palawan, Philippines, 9°13ʹ00ʺN, 118°51ʹ15ʺE, 1105 fm [2021 m]) .

Nematonurus macrocephalus Maul, 1951:17–22, figs. 3, 4c (holotype, MMF [mounted spec.], 210 HL, taken off Madeira) .

MATERIAL EXAMINED (1 spec.).— SCS: ASIZP 66117 (1, 132.6 HL), CD 325, 1982 m . SET: NMMB-P uncat. (1, 1240 TL), Taitung .

DISTINGUISHING FEATURES.— 1D II,9–11, P i19, V 9–11, inner GR-I about 10, outer GR-II 8–9 total, scales below 2D 6–7. (Proportional measurements of Taiwan specimen in square brack- et): snout length [27] 23–29% HL; preoral [17]10–12%; orbit [20] 16–26%; interorbital [27] 26–30%; upper jaw [38] 37–43%; barbel [20]10–23%; greatest body depth 80–100%; height 1D [76] 43–73%; length V [62] 50–111%. Snout low, bluntly rounded (in adults) to bluntly pointed (juveniles), scarcely extending beyond mouth in adults; no stout angular ridges on head; suborbital region vertical. Second 1D spine serrated (serrations reduced in largest specimens), slightly produced; outer V ray moderately produced. Upper jaw extends to below hind margin of orbit. Premaxillary teeth in narrow tapered band, outer series enlarged; mandibular teeth in about 3 series tapering to one. Head fully scaled except for gular and branchiostegal membranes; modified, thickened scales on suborbital and small tubercles at snout tip and at lateral angles; body scales densely covered with small conical spinules in irregularly divergent rows. (Measurement and count data partly from Shcherbachev and Iwamoto [1995], and Iwamoto and Williams [1999])

DISTRIBUTION.— Possibly worldwide in warm seas; depth range 600–3500 m , but usually 1000–2000 m. One of Taiwanese specimens collected in the South China Sea in 1982 m and anoth- er one was taken from off Taitung as depth not less than 400 m.

REMARKS.— Our specimen is the first collected in Taiwan waters (recorded by Shao et al. 2008: table 2) and one additional specimen was collected from SW Taiwan off Taitung. Its presence is not surprising in that the holotype of C. paradoxus , a synonym, was captured off e. Luzon Island in the Philippines .

Figures

FIGURE 11. Coryphaenoides rudis Günther, 1878. A. ASIZP 66117, 133 mm HL, fresh. B. NMMB-P uncat., 1240 mm TL, fresh and C. same specimen, dorsal view of head.