On Some Anoplocephaline Cestodes from Pikas, \u3ci\u3eOchotona\u3c/i\u3e spp. (Lagomorpha), in Nepal, with the Description of \u3ci\u3eEctopocephalium abei\u3c/i\u3e gen. et sp. n.

Three species of anoplocephaline cestodes, Anoplocephalinae gen. et sp. indet., Schizorchis cf. altaica Gvozdev, 1951, and Ectopocephalium abei gen. et sp. n., are reported from pikas, Ochotona roylei (Ogilby) and O. macrotis (Giinther), from central Nepal. The taxonomic status of Schizorchis esarsi Lovekar et al., 1972, and of Schizorchodes dipodomi Bienek and Grundmann, 1972, is discussed, with the conclusion that both species belong in the subfamily Linstowiinae, near the genus Atriotaenia Sandground, 1926. Ectopocephalium gen. n. is distinguished from other genera in the subfamily Anoplocephalinae by the modified anterior portion of the strobila, which is embedded in the tissue of the sacculus rotundus (lower ileum) of the host, and by the arrangement of the genital organs. The attachment of E. abei and the consequent tissue response are described, and the zoogeography of cestodes in pikas is briefly discussed