Abstract

The Emperor Goose (Philacte canagica L.) is probably the least known of American geese. It is confined to such narrow limits in its breeding range and on its migrations that few helminthologists have had the opportunity of investigating its parasites. Consequently the literature reveals no records of parasites from this species of anseriform bird. During the latter part of August and early September of 1950, sixteen Emperor Geese, including 9 males and 7 females, were collected by the writer on St. Lawrence Island, Bering Sea, Alaska. Of this number, twelve were heavily parasitized by cestodes representing 3 species of the genus Hymenolepis. Two of these, H. echinocotyle Fuhrmann, 1907, and H. lanceolata (Bloch, 1782), have been reported from other anseriform hosts. The third constitutes a previously unknown species and is herein described as new.

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