Khan & Fatima 1980. Aporcelaimellus goldeni new species and Aporcelaimellus obscurus (Thorne and Swanger, 1936) Heyns 1965 (Aporcelaimidae: Nematoda) from Sind with comments on Thonus saccatus (Eudorylaiminae, new subfamily), Discolaimus Cobb, 1913 and Discolaimium Thorne, 1939. Proceedings of Pakistan Congress of Zoology, 1(B) 1980: 383-389