アイルランドからヘルゴランドを経て南アフリカの喜望峰付近に至る大西洋(Woods and Sonoda, 1973);オーストラリア南部,ニュージーランドからも知られている(谷津,1985)。Bahamonde and Peque~no (1975)は本種を記録していないので,今回のチリからの報告は初記録と思われる。
備 考:
生息水深はニュージーランド近海では780〜1,200m,主として840〜990m(Robertson and Grimes, 1983)。
(中村 泉)
Material examined:
3 from Chile (232.3-283.7 mm SL), FAKU S 602, 603; CP 213.
Description:
D X, 17-18; A V, 10; P1 19-20; P2 T, 6; GR 6+1+13-14=20-21; BR 8; LLS 31.
HL 35.1-36.9% of SL; ED 7.5-8.6; BD 44.1-45.9; SN 9.7-10.7; IO 12.3-12.9; UJ 24.0-25.5; CP 9.7-10.9; P1L 24.4-26.3; P2L 18.1-29.4.
Body oval, deep and remarkably compressed. Head large, about 3 times in SL, with conspicuous cavities surrounded by bony ridges and covered by thin membranes. Mouth oblique, large, posterior end of upper jaw reaching to below posterior margin of orbit, jaws equal when closed. Villiform teeth in bands on jaws and palatines. Vomer edentulous. Eye large, about 4 times in head. Two large nostrils, situated nearer to eye than to tip of snout, anterior nostril circular, posterior nostril elliptical. A week spine at angle of preopercle. Gill-membranes separate from gill-cover distally and free from isthmus. Gill-rakers on first arch long and finely serrated medially. Rather small, deciduous, ctenoid scales covering body and cheek; lateral line scales larger and stouter. Scutes along belly feeble, indistinct. Lateral line distinct, running in an straight line, obliquely from above upper margin of opercle to caudal fin base. Pectoral fin rather long, about 1.5 in head. Pelvic fin short, not reaching anus. Dorsal and anal fin spines pungent. Procurrent caudal fin spinous. Body uniformely reddish.
Distribution:
Atlantic Ocean, from Ireland and Helgoland to off the Cape of South Africa (Woods and Sonoda, 1973); South of Australia, around New Zealand (Yatsu, 1985). Bahamonde and Pequeño (1975) did not record this species in Chilean waters, so this seems to be the first record for Chile.
Remarks:
This species is easily distinguishable from two Japanese species, H. japonicus and H. crassispinus, which have fewer (12 or 13) dorsal soft fin rays (H. atlanticus, 17 or 18). The depth range caught is 780-1,200 m (mostly 840-990 m) (Robertson and Grimes, 1983)
(Izumi NAKAMURA)
Distribution of Hoplostethus atlanticus in Patagonia.