Three new Nadejdolepis Spassklii & Sasskaya, 1954 (Cestoda : Hymenolepididae), parasites of Charadrii (Aves) in Tasmania

Three species of Nadejdolepis from Tasmania, Australia, are described and i llustrated. N. burgessi n. sp., a parasite of Charadrius ruficapillus, is 4 -6 mm long, with rostellar nitiduloid hooks 63-66 mum long, a short evagina ted cirrus 13-16 mum long with a short collar of thin spines 1 mum long, a narrow and tubular sclerotinoid vagina 40-50 long and 3-4 mum in diameter w ith a little ampulla 3-5 mum in diameter at the proximal end, and a membran ous atrial segment with smooth, short (1 mum) and compact spines which are sometimes difficult to observe. N. smithi n. sp., a parasite of 40-50 long and 3-4 mum in diameter with a little ampulla 3-5 mum in diameter at the pr oximal end, and a membranous atrial segment with smooth, short (1 mum) and compact spines which are sometimes difficult to observe. N. smithi n. sp., a parasite of C. ruficapillus and Arenaria interpres, is 2-3.5 mm long, wit h rostellar nitiduloid hooks 90-98 mum long, a short evaginated cirrus (13 x 6.5 mum) with a short collar of thin 'bristles' of decreasing length (2-3 mum) and prolonged by a short and thin stylet, a sclerotinoid and conical vagina of 20 x 6 mum, with an ovoid ampulla 6-7 x 4-9 at its slender end, a nd a membranous atrial segment like that of the preceding species. N. kinse llai n. sp., a parasite of C. ruficapillus is 25-40(?) mm long, with rostel lar nitiduloid hooks 89-93 mum long, a fusiform genital atrium 100 x 30 mum long with a very narrow pore, and a very long narrow cirrus-sac, which is cylindrical (not fusiform), has its aporal extremity lying in the preceding proglottis and has a slender uninterrupted wall without helicoid fibres. T he poral extremity of the cirrus-sac is fastened by a long transverse muscl e. An evaginated cirrus was not observed. The invaginated ejaculatory canal has two successive types of spines: a subterminal short portion (20-25 mum ) with thick spines, followed by a long portion (100-120 mum) with numerous thin and compact 'bristles' 5 mum long. There is a very long convoluted sp ermatic duct (400-500 mum). The membranous tubular vagina is long (400-450 mum), thick-walled but not muscular and convoluted anterior to the distal p art of the cirrus-sac; a chitinoid chamber, copulatory segment and sphincte r are absent. Nadejdolepis species parasitic in Charadrii are reviewed. Non e of the species previously reported presents anatomical features similar t o the three new species. N. kinsellai has morphological characters which di ffer in detail from other species in the genus. Hymenolepis (Hymenolepis) m udderbugtenensis Deblock & Rose, 1962 is transferred to the genus Nadejdole pis.