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Revista Brasileira de Zoologia

Print version ISSN 0101-8175


BRASIL-SATO, Marília de Carvalho  and  PAVANELLI, Gilberto Cezar. Neoechinorhynchus pimelodi sp.n. (Eoacanthocephala, Neoechinorhynchidae) parasitizing Pimelodus maculatus Lacépède, "mandi-amarelo" (Siluroidei, Pimelodidae) from the basin of the São Francisco river, Três Marias, Minas Gerais, Brazil. Rev. Bras. Zool. [online]. 1998, vol.15, n.4, pp.1003-1011. ISSN 0101-8175.

Neoechinorhynchus pimelodi sp.n. is described as the first record of Acanthocephala in Pimelodus maculatus Lacépède. 1803, collected in the São Francisco river, Três Marias, Minas Gerais. The new species is distinguished from other of the genus by the three circles of hooks of different sizes, and by the eggs measurements. The hooks measuring 100-1 12 (105), 32-40 (36) and 20-27 (23) in length in the males and 102-142 (129), 34-55 (47) and 27-35 (29) in length in the females for the anterior, middle and posterior circles. The eggs measuring 15-22 (18) in length and 12-15 (14) in width, with concentric layers of texture smooth, enveloping the acanthor.

Keywords : Acanthocephala; Neoechinorhynchidae; Neoechinorhynchus pimelodi sp.n.; Pimelodus maculatus; São Francisco river; Brazil.

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