The new species Crocodorylaimus minor sp. n. is described, and Aporcella maitai (Yeates, 1967) comb. n. is redescribed. C. minor sp. n. resembles C. dadayi (Thorne et Schwanger, 1936), but differs from it in a shorter body, shorter odontostyle, absence of vulvar papillae, slenderer tail in females, and shorter spicules. Aporcelaimellus maitai Yeates, 1967 is transfered to the genus Aporcella Andrassy, 2002, taking the name Aporcella maitai (Yeates, 1967) comb. n. Aporcelaimellus heynsi Baqri et Jairajpuri, 1968 and Aporcelaimellus glandus Botha et Heyns 1991 are synonymized under Aporcella maitai (Yeates, 1967) comb. n. Identification keys to the valid species of the genera Crocodorylaimus and Aporcella are provided.