Studies on Monogenetic Trematodes. XV. Dactylogyridae from Alaska, Wisconsin, and Wyoming

Abstract

The material treated herein was collected from Wisconsin and Wyoming by Dr. R. V. Bangham of Wooster College, Wooster, Ohio; and from Alaska by Dr. R. L. Rausch, U. S. Public Health Service, Anchorage, Alaska, to whom the authors are grateful. Available specimens up to a maximum of twenty were used in the treatment of each species. Only two Tetraonchinae namely, Tetraonchus varnabilis from the round white fishes Prosopium w. williamsoni and Prosopiu 1 cylindraceum quadrilaterale, and T. rauschi from the grayling, Thymallus signifer, are new. The host distribution of the remaining nine species is as follows: Cleidodiscus floridanus and C. pricei from the channel cat, Ictalurus 1. ldcustris; C. vancleavei from the white crappie, Pomoxis annularis; Murraytrema copulata from the rosyside sucker, Catostomus fecundus; Urocleidus chrysops and U. mimus from the white bass, Lepibema chrysops; Dactylogyrus bulbus and D. cornutus from the common shiner, Notropis cornutus frontalis; and D. extensus from the carp, Cyprinus carpio.