Abstract
Cyphocharax laticlavius, new species, is described from Amazonian Ecuador. It is distinguished from congeners by the combination of a dark midlateral stripe originating at the hypural joint and extending to at least the vertical line through the midbase of the dorsal fin, possession of 31 or 32 pored lateral-line scales, and by the extreme reduction of the sixth infraorbital. The distribution of Cyphocharax gouldingi, previously known only from the eastern portions of the Amazon basin and adjoining drainages of Brazil, is extended to Ecuador. CYPHOCHARAX, the most speciose of the eight genera of the detritivorous characiform family Curimatidae, is widely distributed in the running and still waters of much of lowland South America (Vari, 1989:58). Whereas many Cyphocharax species are distributed across broad areas as evidenced by extensive series of specimens, some of their congeners have restricted known distributions, often being represented by a few specimens from a single drainage basin or locality. The latter pattern, in conjunction with the unsatisfactory sampling to date of the South America freshwater fish fauna, makes it likely that additional collecting efforts will yield undescribed species. Subsequent to
Published Version
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