本亜種とE. nitidus nitidusの違いは側線鱗数に最もよく現われている:100〜105対87〜89(Heemstra and Randall, 1977)。
(中村 泉)
Material examined:
8 from Chile (294.6-342.0 mm SL), FAKU CP 426, 516, 517, 625, 637-640.
Description:
D ]V, 9-10; A V, 10; P1 22-23; P2 T, 5; GR 9-11+1+27-31=37-43.
HL 26.6-27.7% of SL; ED 5.5-6.5; BD 19.7-22.4; BW 13.5-15.0; SN 7.3-8.0; IO 7.0-7.5; UJ 10.8-11.2; CP 6.1-6.9; P1L 20.7-21.5; P2L 12.8-15.5; D1H 11.5-13.5; D2H 8.5-9.6; AH 9.5-10.5.
Body elongate, slightly compressed (subcylindrical). Head small, 3.5-4.0 times in SL. Head covered with various sized scales except an anterior part of snout and both upper and lower jaws. Nostrils small, anterior nostril oval and posterior nostril crescent. Mouth moderate in size, extremely protrusible. Maxilla large, wide, completely covered with scales and not covered by rachrymal. A well developed supramaxilla along dorsal margin of maxilla. Premaxilla with a broad ascending process and a distinct middorsal process. A large rostral cartilage connected to ascending process of premaxilla which slides forward or backward along median dorsal ridge of ethmoid when mouth retracted and protruded. A few minute teeth on jaw anteriorly, upper jaw toothless. Toothless on vomer, palatines and tongue. Eye large, 4.3-4.6 times in head. A blunt spine on posterior part of opercle. Two distinct protuberances on posterior margin of gill-cavity. Interorbital region flat, its width nearly equal to snout length. Anterior edge of snout at dorsal midline with a distinct squarish notch which receives a fleshy pad at premaxillary symphysis. Last dorsal and anal fin rays prolonged. Scales weak ctenoid, not deciduous. Lateral line fairly straight, running nearer to dorsal profile. Scaly interpelvic process present.
Distribution:
Chile and Juan Fernandez Islands.
Remarks:
The only difference between E. nitidus cyanesces and E. nitidus nitidus is the slightly higher number of lateral-line scales in the former (100-105) versus lower number in the latter (87-89) (Heemstra and Randall, 1977).
(Izumi NAKAMURA)
Distribution of Emmelichthys mitidus cyanscens in Patagonia.