Plectus (Plectus) cryptoptychus De Ley & Coomans 1994
De Ley & Coomans 1994. Terrestrial nematodes from the Galapagos archipelago 4: the genus Plectus Bastian, 1865, with description of three new species (Leptolaimina: Plectidae). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique Biologie, 64 1994: 43-70