Head expanded laterally, greatest maximum width of head 32.3% of TL. First dorsal originated above inner margin of pectoral, and posterior margin above insertion of pelvic. Pectoral inserted between 4th and 5th gill-openings. Anterior margin of head from nostril to tip of snout somewhat concave at middle. Middle of snout also concave. Prenarial groove well developed. Line between posterior margins of eyes passing anterior to symphysis of upper jaw. Arrangement of mucous pores on ventral side of head is shown in the figure. Teeth on jaws without serrations; upper jaw teeth deeply notched; lower jaw teeth nearly erect except near corner of mouth.
Distribution:
Mediterranian; South America from Venezuera to Uruguay.
Remarks:
Because of the smallness of the specimen, the anterior margin of head strongly arched. (Uyeno and Miyake)