José Luis Luque

Diversidade das infracomunidades de estrongilídeos do cólon dorsal de Equus caballus do estado do Rio de Janeiro, Brasil

Twenty three species of the strongylid nematodes (18 Cyathostominae and five Strongylinae) were collected 33 equines in Metropolitana region of Rio de Janeiro State, Brazil. Cylicostephanus longibursatus (90.9%; 1,078.4), Cylicostephanus goldi (81.8%; 236.9) e Cylicocuclus nassatus (75.8%; 39.1) were the most prevalent and abundance species, respectively. Cylicostephanus longibursatus showed highest dispersion (2,425.1) and one of smallest aggregation value (0.1). Five infracommunities (2, 3, 11, 24 and 25) showed equal parasite richness (4.0), however the values obtained from diversity indices were different because the unequal evenness of these samples.

A new species of Probursata Bravo-Hollis, 1984 (Mogenea: Heteraxinidae: Heteraxininae) parasite of Oligoplites spp. (Osteichthyes: Carangidae) from the coast of the state of Rio de Janeiro, Brazil

Probursata brasiliensis n. sp., a gill filament parasite of carangid fishes, O. palometa (Cuvier), Oligoplites saurus (Bloch & Schneider), and O. saliens (Bloch), from the Brazilian coast, is described and illustrated. The new species differs from Probursata veraecrucis Bravo-Hollis, 1984, the type and only species of this genus by the presence of spines in the auricular expansions of the genital atrium, by the trifurcate supplementary process of the clamps midsclerite, and by having a larger number of tests and clamps. This is the first record of the genus Probursata Bravo-Hollis, 1984, in the South Atlantic Ocean.