Diplostomes from the brown pelican, Pelecanus occidentalis (Pelecanidae), from the Galveston, Texas area, including two new species of Bursacetabulusgen. n.

During a study of digeneans of shorebirds from the Galveston, Texas, area o f the Gulf of Mexico, brown pelicans, Pelecanus occidentalis, were found to be infected with 2 species of a new genus of Diplostomidae, Bursacetabulus pelecanus sp. n, and B. macrobursus sp. n. Bursacetabulus gen. n. can be d istinguished from all other genera of Diplostominae by having an inconspicu ous, pouchlike tribocytic organ that contains portions of the uterus and vi tellaria, a suckerlike copulatory bursa, and ceca terminating some distance anterior to the posterior end of the body. The new genus is most similar t o Tylodelphys but has a much shorter hind body, the vitellaria do not exten d past the testes in the hind body, and it lacks a prepharynx, genital cone , and highly structured tribocytic organ. Bursacetabulus macrobursus sp. n. can be distinguished from B. pelecanus sp, n. by having a larger body size and a large bell-shaped skirt around the copulatory bursa. One of the brow n pelicans also harbored Bolbophorus confusus, not previously reported from this host.