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Korotkevich, V. S. (1977). On two new species of genus Lineus (Heteronemertini) and the origin of two lobes on the posterior end of the body of nemerteans [O dvukh novykh vidakh Lineus (Heteronemertini) i proiskhozhdenii dvulopastnogo zadnego kontsa tela u nemertin]. Issledovaniia Fauny Morei, 21(29): 22-38