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Biol Bull 116: 184-193. (February 1959)
© 1959 Marine Biological Laboratory
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THE LIFE-CYCLE OF THE DIGENETIC TREMATODE, PROCTOECES MACULATUS (LOOSS, 1901) ODHNER, 1911 [SYN. P. SUBTENUIS (LINTON, 1907) HANSON, 1950], AND DESCRIPTION OF CERCARIA ADRANOCERCA N. SP

HORACE W. STUNKARD 1 and JOSEPH R. UZMANN 1

1 U. S. Fish and Wildlife Service

Sexually mature worms from Mytilus edulis, taken in Connecticut and Massachusetts, are identified as Proctoeces maculatus (Looss, 1901). The specimens are often sterile, which reflects the abnormal conditions of development in the molluscan host. Similar worms were reported by Freeman and Llewellyn (1958) from Scrobicularia plana taken in the Thames estuary, England, and identified as Proctoeces subtenuis (Linton, 1907), but we regard P. subtenuis as identical with P. maculatus. Evidence is presented to show that Cercaria milfordensis Uzmann, 1953 is the larval stage of P. maculatus. The taxonomy of the species is discussed. Cercaria adranocerca n. sp. is described from Gemma gemma taken at Boothbay Harbor, Maine. It is not congeneric with P. maculatus, but is referred tentatively to the family Fellodistomidae.






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Copyright © 1959 by the Marine Biological Laboratory.