A Morphological Study and Description of Biacetabulum biloculoides Mackiewicz and Mccrae, 1965 (Cestoda: Caryophyllidae) From Catostomid Fishes in Lakes and Rivers of Wisconsin, With Special Notes on Concurrent Infections

Abstract

Thirteen species in 8 genera of caryophyllid cestodes including Biacetabulum biloculoides Mackiewicz and McCrae, 1965 were found in Catostomus commersoni (Lacépède), Cyprinus carpio (Raf.), and Erimyzon sucetta (Lacépède) in 2 lakes and 2 rivers in SE Wisconsin and/or SW Lake Michigan. The morphology of the Wisconsin populations of B. biloculoides is revisited and missing information from the original description and ours were completed and all measurements compared. The posterior movement of Acanthocephalus dirus (Van Cleave, 1931) Van Cleave and Townsend, 1936 and the anterior movement of B. biloculoides and Glaridacris catostomi Cooper, 1920 in concurrent infections of the intestine of C. commersoni were discussed as a clear case of competitive exclusion. Light microscopy revealed new features especially of the scolex and reproductive structures.