本種はMacrourus holotrachys(=Coryphaenoides holotrachys)の異名と考えられることも多い(Marshall and Iwamoto, 1973; Iwamoto, in press; 荒井孝男,私信)。
(中村 泉)
Material examined:
10 from Argentina (251.6-387.5 mm TL), FAKU AP 201, 203, 204, 209-212, 215, 219, 303.
Description:
D U, 9-10, ca. 115; A ca. 110; P1 18-20; P2 7-9; GR 7-8; Scales above LL 5.5-6.5; LLS till above anal origin 17-21.
HL 59.4-66.5 % of PreA; BO 21.2-25.9; BD 37.9-44.3; SN 20.5-22.3; IO 10.5-13.9; UJ 18.3-21.4; P1L 29.6-34.0; P2L 16.7-21.2.
Body compressed and elongate, not subcylindrical, width at dorsal fin origin much smaller than depth. Head large, about 1.6 times in preanal length. Snout rather short and well anterior to mouth, its length about equal to orbit. Eye very large, 2.8-3.0 times in HL. Interorbital region slightly concave with two ridges of scale rows extending above middle of pupil, its width about half orbit diameter. A small barbel on chin. Mouth inferior and protractile. Fine tooth bands on both jaws, outer row enlarged on upper jaw. Villous dermal processes on lips and roof of mouth. No teeth on vomer or palatines. No pseudobranchiae. Gill-rakers nub-like. Gill-cavity dusky. Ctenoid scales on whole body except snout and pectoral fin base and ventral side of head. Each scale with 3-6 strong, backwardly directed spines on a median row, with or without 1-3 smaller spines as accessory rows. First dorsal fin large, first spine with coarse serrations on distal two-thirds. Pectoral fin rather large, its origin above pelvic fin origin. Pelvic fin small, outer fin ray filamentous. Anal fin higher than 2nd dorsal fin, its origin below tip of pectoral fin. Single lateral line running from upper insertion of opercle to caudal fin.
Distribution:
Argentine Patagonia, also known from the Antarctic Sea (Norman, 1937b).
Remarks:
This spcies is thought to be a junior synonym of C. holotrachys by some authors (Iwamoto, in press; Arai, T., personal communication). Macrourus is adopted for this species by Marshall and Iwamoto (1973).
(Izumi NAKAMURA)
Distribution of Coryphaenoides whitsoni in Patagonia.