Digenea parasites of Acestrorhynchus falcirostris (Osteichthyes, Acestrorhynchidae) in the state of Amazonas, Brazil

Abstract

This study presents the helminthofauna of digenean parasites of Acestrorhynchus falcirostris in the state of Amazonas (Brazil). Eight species belonging to four families were recovered: Metacercariae of Austrodiplostomum compactum (Diplostomidae) and Clinostomum marginatum (Clinostomidae) and mature specimens of Bellumcorpus majus, Prosorhynchoides carvajali, Rhipidocotyle santanaensis (Bucephalidae); Prosthenhystera obesa (Callodistomidae); Genarchella genarchella (Derogenidae) and Phyllodistomum spatula (Gorgoderidae). Examining specimens belonging to the genus Bellumcorpus collected from A. falcirostris, were observed a great variation in the size and shape of testes, which also could be observed in the type specimens of Bellumcorpus majus and B. schubarti. Considering the similar morphology and morphometric characteristics of both species, in this paper B. schubarti is considered synonym of B. majus. Acestrorhynchus falcirostris is a new host records for all these species of digenean, except to A. compactum and C. marginatum. Prosorhynchoides carvajali is referred for the first time in Brazil.

Morphological and molecular data on Phyllodistomum (Digenea: Gorgoderidae) from Brazil, with the description of a new species parasitizing Hoplias malabaricus (Bloch, 1794) (Osteichthyes, Erythrinidae)

“…One species, P. spatula, seems to be widely distributed in Brazilian fishes and was first recorded in Ceará, Brazil, by Fernandes (1984) from C. macropomum (Cuvier, 1818). Later, it was reported infecting H. malabaricus and H. intermedius from the São Francisco River from Minas Gerais state (Costa et al 2015) and Acestrorhynchus falcirostris Cuvier, 1819 from the municipality of Manus, Amazonas state (Fernandes et al 2017). We also believe that at least the records by Costa et al (2015) may correspond to the species described here.…”

“…2015) and Acestrorhynchus falcirostris Cuvier, 1819 from the municipality of Manus, Amazonas state (Fernandes et al . 2017). We also believe that at least the records by Costa et al .…”