Revision of Bursacetabulus (Diplostomidae : Diplostominae) with the proposal of Bursatintinnabulus n. gen., and description of Bursatintinnabus bassanus n. sp and Bursacetabulus morus n. sp from northern gannet, Morus bassanus (aves), from the Texas gulf coast

During a study of digeneans of shorebirds from the Texas gulf coast, 2 unde scribed species of diplostomes were found in northern gannet, Moors bassanu s. Bursatintinnabulus n. gen. (Diplostomidae) is established with reassignm ent of Bursacetabulus macrobursus Dronen et al., 1999, as type species, and the second species in the proposed genus is described, Bursatintinnabulus bassanus n. sp. Generic diagnosis of Bursacetabulus Dronen et al., 1999, is emended to include a conical hindbody, an inconspicuous pouchlike or consp icuous well-developed tribocytic organ, and digitiform vitellaria distribut ed mainly in the hindbody with processes extending into the tribocytic orga n and ventrolaterally in the hindbody to the level of the testes. Bursaceta bulus morus n. sp. is described as the second species in that genus. In Dip lostominae, Bursacetabulus and Bursatintinnabulus n. gen. are most similar to Tylodelphys Diesing 1850, but can be distinguished by having smooth test es and vitellaria that extend ventrolaterally into the hindbody to the leve l of the posterior testis; and the absence of a genital cone, an acetabulum , and a prepharynx. Bursatintinnabulus n. gen. is different from Bursacetab ulus and all other genera of Diplostominae by a well-developed, bell-like s kirt surrounding the bursa.