title: Rhinebothrium biorchidum n. sp., a tetraphyllidean cestode from a yellow-spotted stingray, Urolophus jamaicensis, in Jamaica.
abstract: Rhinebothrium biorchidum n. sp. (Tetraphyllidea: Phyllobothriidae) is described from the spiral valve of the yellow-spotted stingray, Urolophus jamaicensis, from Jamaica. It was most similar to R. spinicephalum Campbell 1970 but differed by having fewer proglottids (15 to 26 vs. 36 to 49), smaller peduncle (110 to 146 vs. 330 to 470) and pedicels (100 to 180 vs. 170 to 370), fewer transverse septa (6 to 8 vs. 16 to 17), fewer total loculi per bothridium (22 to 30 vs. 32 to 34) and larger ovarian lobes (148 to 310 vs. 88 to 176). A key to bitestate species of Rhinebothrium is included.
mesh_terms: D000818:Animals; D002589:Cestoda / Q000033:anatomy & histology / Q000145:classification; D002590:Cestode Infections / Q000662:veterinary*; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes / Q000469:parasitology*