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forehead profile convexD & A: no long front lobes, partly scaledtail base: no transverse grooves
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body deep, compressed, oval
fatty ring around eyeD & A III, long bases, high at front, scale coveredC forkedsnout v short; mouth smallpelvics = tiny spine -
forehead profile convexD & A: broadly expanded, front rays not thickened
D origin over eyetail base: no transverse grooves -
forehead profile oblique
snout pointedD & A: long front lobestail base: transverse grooves & strong keelpelvics not tiny -
forehead profile convex
snout roundedD & A - long front lobestail base: transverse grooves, no keelpelvics small