-, ''' ■ , :.' ■:■:•■■■. 257 



section on pigmentation), and strongly resemble the Amazonian specimens when 

 allowed to reach maximum pigmentation intensity. Since both populations are 

 identical in all other morphological respects, they are here considered conspecific, 

 and the difference in pectoral rays, if real, is attributed to infraspecific or 

 geographical variation, •,'■ 



Material Examined 



Type Material . - Holotype : NMW 47853 (154), Rio Purus, Goldi. .. ■ 

 Venezuela . - Apure : MCNG 823, 1272, 1476, 5962 (10, 67-205), Hato el 

 Frio, NW of Mantecal, 2 October 1979, D, C, Taphom et al. UF 80895 (male, 146), 

 Cano Maporal in isolated section along a dead end road S of UNELLEZ module, 

 13 February 1979, D, C, Taphom and C. G. Lilyestrom. UF uncat. (2, 156-157), 

 barrow pit canal on E side of UNELLEZ module, 14 February 1979, D. C, Taphom 

 et al (DCT79-17). USNM 257551 (3, 113-137), side channel of Rio Apure about 3 

 km W of center of San Fernando, r53'N, 67°29'W, 25 January 1983, personnel of 

 Apure Fisheries Station, USNM 258262 (3, 125-134), Rio el Canito, where crossed 

 by road from San Femando to Cunaviche, 7°28'N, 67°39'W, 22 January 1983, San 

 Femando Fisheries Sta. personnel, Barinas : MCNG 3406 (5, 115-138) Rio Apure, 

 flooded zone in front of Bmzual, 6 November 1981, S, Reid et al. MCNG 5508 (8, 

 101-128), Caiio Dora, Reserva Forestal Ticoporo, 9 December 1982, D. C, Taphorn 

 and G. Rios. MCNG 5862 (male, 169), canals near Dolores, 30 May 1980, D, C. v 

 Taphom et al. UF uncat. (male, 165), Rio Guasimito, SE of Arismendi, 6 April 

 1984, D. C. Taphorn et al. Delta Amacuro : USNM 265633 (1, 146), shallow lagoon 

 on N side of river, west of Cano Araguaito, 131 nautical mi from sea buoy, 14 

 November 1979. Guarico : UF 78146 (4, 137-147), Rfo Chirgua at log bridge on 

 unpaved road from Guardrinajas to Barbasco, due E of Barbasco, 23 March 1981, 



