Anophryocephalus inuitorum sp. nov. and A. arcticensis sp. nov. (Eucestoda: Tetrabothriidae) in Ringed Seals (Phoca hispida hispida) and Harp Seals (Phoca groenlandica) from High-Latitude Seas of Eastern Canada and the Arctic Basin

Anophryocephalus inuitorum sp.nov. and A. arcticensis sp.nov. are described from ringed seals (Phoca hispidu hispida) in the eastern Canadian Arctic; the latter species is also reported from harp seals (Phoca groenlandicu) in the Gulf of St. Lawrence. Anophryocephalus inuitorurn is most similar to A. skrjabini, but can be distinguished by fewer testes (14-27) and smaller dimensions of the strobila, neck (3.0-5.9 mm long), and cirrus sac (31 -70 pm long), diameter of the genital atrium (44 -68 pm), and length of the male canal (23 -42 pm long). Anophyocephulus arcticensis resembles A. nunivakensis in the structure of the scolex, but is readily distinguished by a longer neck (8.914.7 mm), an elongate cirrus sac (60-98 x 44-73 pm) with a substantially thicker muscular wall, a more globular vitelline gland, and larger embryophores (29-41 pm long) and oncospheres (24-34 pm long). These are the first species of Anophtyocephalus to be described from phocines in the eastern Canadian Arctic, and are included in a revised key for the genus. RCsumC : On trouvera ici la description d'Anophryocephalus inuitorum sp.nov. et d'A. arcticensis sp.nov., rencontres chez des Phoques anneles (Phoca hispidu hispida) dans I'est de I'Arctique canadien; la seconde espkce a egalement ete trouvee chez des Phoques du Groenland (Phoca groenlandica) dans le golfe du Saint-Laurent. Anophryocephalus inuitorum s'apparente surtout a A. skrjabini, mais s'en distingue par le nombre plus restreint de ses testicules (14-27) et les dimensions plus reduites des composantes de son strobila, cou (3,O-5,9 mm longueur), sac du cirre (3 1-70 pm), atrium genital (44-68 pm de diamktre), canal mile (23 -42 pm de longueur). Anophyocephulus urticensis resemble a A. nunivakensis par la structure de son scolex, mais s'en distingue facilement par un cou plus long (8,914,7 mm de longueur), par son sac du cirre allonge (60-98 x 44-73 pm) a la paroi musculaire beaucoup plus epaisse, par sa glande vitelline plus globuleuse et par la taille plus importante de ses embryophores (29 -41 pm de longueur) et de ses oncosphkres (24 34 pm de longueur). 11 s'agit la des premieres espkces d'Anophyocephulus jamais trouvees chez des Phocinae dans I'est de I'Arctique canadien; la cle du genre a ete amendee de facon h inclure les nouvelles espkces. [Traduit par la Redaction] Introduction and Arctic) of the northern hemisphere (Hoberg et al. 1991). Among these, 3 species are characteristic of phocids, primarThe genus Ano~hVoce~halus 1922 'Onily those of the tribe Phocini and genus Phoca (see Wyss tains 5 species that are restricted to high latitudes (Subarctic 1988), and include AnophVocephalus anophVs Baylis, 1922 (Palearctic -Atlantic sector of the Arctic basin), A. skrjabini Received April 8, 1994. Accepted September 29, 1994. (Krotov and Deliamure, 1955), and A. nunivakensis Hoberg, Adams, and Rausch, 1991 (both endemic to the North Pacific E.P. Hoberg. United States Department of Agriculture, basin). Additional species, A. ochotensis Deliamure and Agricultural Research Service, Biosystematics and National Parasite Collection Unit, BARC East, Building 1180, 10300 Krotov, 1955 and A. eumetopii Hoberg, Adams and Rausch, Baltimore Avenue, Beltsville, MD 20705-2350, U .S. A. 1991, are exclusively parasites of the otariid Eumetopias L.N. Measures. Department of Fisheries and Oceans, jubatus (Schreber), primarily in the Bering Sea and Sea of Maurice Lamontagne Institute, P.O. Box 1000, Mont Joli, Okhotsk (Hoberg and Adams 1992). QC G5H 324, Canada. Although cestodes of Phoca spp. in the North Pacific Can. J. Zool. 73: 34-44 (1995). Printed in Canada 1 Irnprirne au Canada This article is a U.S. government work, and is not subject to copyright in the United States.