The Pygidiidae : a Family of South American Catfishes Vol. 7 No. 5
The Pygidiidae : a Family of South American Catfishes Vol. 7 No. 5
Carnegie Museum
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M., 33-43 mm. Caceres, May 23, 1909. Haseman. 7558a, C. M., 42 mm. San Francisco, Rio Jauru, Paraguay basin, June 10, 1909. Haseman. 7559a, C. M., 32 mm. Bastos, Rio Alegre, eight miles south of Villa de Matto- Grosso, June 26, 1909. Haseman. 7560a-c, C. M., 39-41 mm. San Antonio, Rio Guapore, plantation of Maciel, July 31-Aug. 11, 1909. Haseman. Head 5-5.75; D. 9-10; A. 8; P. 6; posterior margin of eye shghtly in advance of the middle of the head; eye about 1.5-2 in the snout, 5.5-6.5 in the h...ead, about equal to the interorbital; maxillarj^ barbel reaching to axil or middle of pectoral; nasal barbel to the tip of the opercular spines or the axil of the pectoral; teeth conical, a very narrow band of but two or three irregular series; origin of ventrals equidistant from tip of snout and tip of caudal; origin of anal under, or but slightly behind, the first dorsal ray; distance from base of last anal ray to base of caudal about six times in the length; distance from origin of dorsal to base of caudal two and three-quarters in its distance from the snout; caudal rounded, accessor}' rays moderate; first pectoral ray much prolonged, with its filament nearly equal to the length of the head.
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