Haematotrephus limnodromi n. sp. (Digenea: Cyclocoelidae) from the Long-billed dowitcher, Limnodromus scolopaceus (Scolopacidae) from the central flyway of North America

During a study of the endohelminths of wading birds from the Texas Gulf coast, 5 specimens of an undescribed species of Haematotrephus (Cyclocoelidae) were studied and described. These specimens were collected by Dr. J. Teague Self, former professor, Department of Zoology, University of Oklahoma, Norman, Oklahoma from the air sacs of a long-billed dowitcher, Limnodromus scolopaceus, that was collected from the Cheyenne Bottoms, Roger Mills County, Oklahoma on August 3, 1963 and deposited in the Manter Laboratory of Parasitology. Haematotrephus limnodromi n. sp. can be distinguished from all the other species in the genus that lack an oral sucker (H. capellae, H. chengi, H. dollfusi, H. fasciatum, H. kossacki, H. lanceolatum, H. longisacculatum, H. nebularium, H. nigropunctatum, and H. phaneropsolus) by having intertesticular uterine loops. Corpopyrum brazilianum (originally described as Cyclocoelum brazilianum) is transferred as the second species in Selfcoelum, Corpopyrum dendrei is transferred to Neohaematotrephus, and Haematotrephus facioi is transferred to Wardianum. This is the first report of a species of Haematotrephus from a species of Limnodromus.

Selfcoelum limnodromi n. gen., n. sp. (Digenea: Cyclocoelidae: Cyclocoelinae) from the long-billed dowitcher, Limnodromus scolopaceus (Charadriiformes: Scolopacidae) from Oklahoma, U.S.A.

Eleven specimens of a new genus of cyclocoelid, Selfcoelum limnodromi n. gen., n. sp. (Digenea: Cyclocoelidae: Cyclocoelinae) from the air sacs of a long-billed dowitcher, Limnodromus scolopaceus, collected from the Cheyenne bottoms in Oklahoma and deposited at the Howard W. Manter Laboratory, University of Nebraska by Dr. Teague Self, former professor, Department of Zoology, University of Oklahoma, Norman, Oklahoma were examined. The new genus has an intertesticular ovary placing it in Cyclocoeolinae. It is most similar to species of Morishitium and Neohyptiasmus in having a postpharyngeal genital pore and vitelline fields that are not confluent posteriorly. However, unlike species of either of these 2 genera, the ovary of S. limnodromi n. gen., n. sp. forms a triangle with the testes as is found in species of Cyclocoelum where the genital pore is prepharyngeal rather than postpharyngeal. Selfcoelum n. gen. further differs from Morishitium by having uterine loops that surpass the ceca and vitelline fields laterally approaching the body wall instead of being intercecal, and from Neohyptiasmus by having testes that are rounded and entire instead of being lobed. A revised key to the Cyclocoelinae is provided to include the 2 additional genera that have been recently described from North America, Neoallopyge and Selfcoelum.