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A New Antarctic Nototheniid Fish with Notes on Two Recently Described Nototheniiforms
Hugh H. DeWitt
Vol. 1962, No. 4 (Dec. 31, 1962), pp. 826-833
Stable URL: http://www.jstor.org/stable/1440685
Page Count: 8
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Aethotaxis mitopteryx, gen. et sp. nov., is described from McMurdo Sound, Antarctica. Distinguishing characters: large, oblique mouth; lower jaw protruding anteriorly with a knob above and below at the symphysis; small conical teeth in a single band in each jaw; vomer and palatines toothless; gillrakers all nondentigerous, those of anterior series on first arch long and slender; branchiostegal membranes united for only a short distance anteriorly; seven branchiostegal rays; two lateral lines on body; tubular lateral-line scales present; cephalic lateral lines enlarged, with prominent pores on top of head; rays of first dorsal and pelvic fins elongated into filaments; vertebrae 52 (16 + 36). Aethotaxis is placed closest to Pleuragramma and is possibly pelagic in habit. A key to the genera of the family Nototheniidae is presented. Corrections and additions are given to the descriptions of Bathydraco wohlschlagi and Chionodraco myersi. The temporal and supratemporal lateral-line canals are shown to vary in the former; pseudobranchiae are present in the latter.