Abstract
Plectus murrayi n. sp. is distinguished from other species by possessing 12 lips; stoma, amphid and excretory system are ‘plectoid’ rather than ‘anaplectoid’. Eudorylaimus antarcticus (Steiner, 1916) n. comb. is proposed for Dorylaimus antarcticus Steiner, 1916 and the species is redescribed. Both species were collected from mosses from the McMurdo Sound Region, Antarctica. Anaplectus arenicola Killick, 1964 has only six lips; stoma and excretory system are ‘anaplectoid’.

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