Date of Award

1972

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Physical Description

1 online resource (viii, 66 leaves. ill.)

Subjects

Euryhelmis cotti

DOI

10.15760/etd.960

Abstract

Fish of the genus Cottus were found infected with heterophyid metacercariae. Laboratory animals were infected with the metacercariae, and adult heterophid trematodes were recovered. These flukes were found to represent an undescribed species of the genus Euryhelmis. Various streams in the Willamette Valley and coastal areas were sampled for infected Cottus sp. Snails of the genera Oxytrema and Fluminicola were collected. Several possible definitive hosts were examined. A partial review of the subfamily Apophallinae and a complete review of the genus Euryhelmis are presented. Euryhelmis cotti n. sp. is placed in the subfamily Apophallinae, and its life cycle is partially described.

Description

Portland State University. Department of Biology

Persistent Identifier

http://archives.pdx.edu/ds/psu/9767

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