文摘
The genus Riggia Szidat 1948 includes five species, all parasites of freshwater fish distributed in South America. The new species has developed eyes and a large size. Riggia puyensis sp. n. was found in C. breve and C. microps from the Puyo and Bobonaza rivers in Ecuador. The prevalence of infection is 1.9% in C. breve, intensity 1 and 2.2% in C. microps, intensity 1.