FURTHER STUDIES ON THE TAXONOMY OF METASTRONGYLES (NEMATODA: METASTRONGYLOIDEA) OF MUSTELIDAE IN ONTARIO

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Abstract
Trilobostrongylus bioccai n.gen., n.sp. from cysts on the lungs of Martes pennanti pennanti (Erxleben) from Algonquin Park is distinct from other members of the Angiostrongylinae primarily on the basis of its large, trilobed bursa. In addition, the dorsal ray is long and well developed, the spicules are long and slender, the externolateral rays are large, the caudal extremity of the female is pointed, and the species is ovoviviparous. Larvae developed in Discus cronkhitei (Newcomb), Zonitoides arboreus (Say), Deroceras gracile (Rafinesque), and Physa integra Haldeman. Filaroides canadensis n.sp. from small nodules in the lungs of Lutra canadensis canadensis (Schreber) from Algonquin Park is distinguished from F. martis by its much shorter spicules, its weakly developed gubernaculum, and its longer and more slender first-stage larva which failed to develop in Physa integra. Perostrongylus Schlegel 1934 is reinstated and redefined to include ovoviviparous species, namely P. falciformis (Schlegel, 1933) Schlegel, 1934, and P. pridhami (Anderson, 1962) n.comb., which were formerly assigned to Aelurostrongylus.