D 86; A 63; P19 (ocular side); P2 6; C 15; LLS 70; GR 21 (lower limb).
HL 20.7% of SL; ED 5.8 (upper), 4.8 (lower); BD 45.0; SN 4.4; IO 2.0; UJ 8.9 (ocular side), 8.3( blind side); CP 11.7; P1L 16.0 (ocular side).
Body elongate and compressed. Eyes on left side, separated each other by a narrow, flat, scaled space; upper eye slightly anterior to lower eye. Mouth of moderate size; posterior end of upper jaw reaching below middle of eye; lower jaw
slightly projected anterior to upper jaw; jaws and dentition about equally developed on both sides; small conical teeth in broad bands on both jaws; vomer toothless. Margin of gill-cover fringed. Gill-rakers long and slender. Dorsal fin origin situated above nostrils of blind side and just anterior to upper eye; anterior dorsal rays close together. Pectoral fins short, unequal; that of ocular side larger. Pelvic fins with short base, subequal and subsymmetrical. Caudal peduncle short, high; with roundly protruded posterior margin. Scales small, ctenoid on both sides of body; snout, both jaws and all fins except caudal fin scaleless. Lateral line equally developedo on both sides of body, slightly curved above pectoral fin; no supratemporal branch. Anus opened on blind side, just anterior to anal fin origin. Brownish on ocular side, mottled and spotted with darker flecks, and with small dark spots; pectoral fin blackish; all other fins brownish.
Distribution:
Patagonian Falkland Region, Straits of Magellan and the southern Chile northward to Mocha Island (Norman. 1937) at depths of 90 m to 170 m. The record from Chile is supposed to be doubtful.
Remarks:
This species is readily distinguished from other bothids by absence of curve in the laterla line, more anterior origin of dorsal fin, the simple median fin rays, and long and slender gill-rakers (Norman, 1934). This genus in monotypic.
(Tadashi INADA)
Distribution of Thysanopsetta naresi in Patagonia.