Date of Award

1971

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Physical Description

1 online resource (iv, 28, [1] leaves, 3 mounted plates. 28 cm.

Subjects

Philophthalmus megalurus

DOI

10.15760/etd.1431

Abstract

The specific identification of a megalurous cercaria found in the snail Oxytrema plicifera was accomplished by completing the life cycle in the laboratory. This species is compared with the eastern Philophthalmus megalurus and P. gralli with which it was once confused. The eggs, miracidia, and rediae of the Oregon species were found to be similar to those of the above species. The body and organ sizes and sucker ratios for the cercariae and adult stages obviously indicate that the Oregon species is Philophthalmus megalurus.

Description

Portland State University. Department of Biology

Persistent Identifier

http://archives.pdx.edu/ds/psu/10049

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