Studies on the hymenolepid cestodes of waterfowl from New Brunswick, Canada

Abstract

Twenty-one species of hymenolepid cestodes found in 12 species of waterfowl collected in New Brunswick, Canada, are identified and described in the following order: Aploparaksis furcigera (Nitzsch in Rudolphi, 1819); Diorchis bulbodes Mayhew, 1929; D. microcirrosa Mayhew, 1929; Cloacotaenia megalops (Nitzsch, 1829); Dicranotaenia coronula (Dujardin, 1845); Drepanidotaenia lanceolata (Bloch, 1782); Echinocotyle rosseteri Blanchard, 1891; Hymenolepis abortiva (von Linstow, 1904); H. collaris (Batsch, 1786); H. hopkinsi Schiller, 1951; H. paracompressa Czaplinski, 1956; H. parvula Kowalewski, 1904; H. rauschi Schiller, 1950; H. spinocirrosa Podesta and Holmes, 1970; H. tuvensis (Spasskaya and Spasskii, 1961); Retinometra macracanthos (von Linstow, 1877); Sobolevicanthus filumferens (Brock, 1942); S. gracilis (Zeder, 1803); Wardium creplini (Krabbe, 1869); Fimbriaria fasciolaris (Pallas, 1781); Diploposthe laevis (Bloch, 1782). The descriptions are supported by text figures and tables. A summary of the previous descriptions of each species is given.Dicranotaenia mergi (Yamaguti, 1940), Dicranotaenia anceps (Linton, 1927), Dicranotaenia sacciperium (Mayhew, 1925), and Dicranotaenia kutassi Matevosian, 1945, previously considered synonyms of Dicranotaenia coronula, are considered valid species. Hymenolepis compressa of Beverley-Burton (1964) nec (Linton, 1892) and Hymenolepis compressa of Bezubik (1956) nec (Linton, 1892) are considered synonyms of Hymenolepis paracompressa. Kowalewskius yoshidai Yamaguti, 1956 is a synonym of Hymenolepis parvula Kowalewski, 1904. Wardium aequabilis of Spasskaya 1961 nec (Rud., 1810) is considered a synonym of Wardium creplini and Diploposthe mathevossianae Ryšavý (1961) is considered a synonym of Diploposthe laevis.