"Helicotylenchus canadensis" . . . _:b75660218 "GBIF id" . . _:b75660218 . . _:b75660218 "4556514" . _:b75660218 . . "Waseem, 1961" . "Helicotylenchus canadensis" . . _:b75660218 . "982078" . "4556514" . . . "Helicotylenchus canadensis" . "Helicotylenchus canadensis Waseem, 1961" .