Species of Aphanolaimus (Nematoda: Araeolaimida) from Belgium

A nematological survey of Belgium revealed four species of Aphanolaimus, two known ones, A. attentus de Man, 1880 and A. aquaticus Daday, 1894, and two new ones. A. pseudoattentus n.sp. resembles A. attentus in many respects but can easily be distinguished by the greater body length, the head shape, the shape of the amphideal fovea and the longer cephalic setae. A. deconincki n.sp. is characterized by its head shape, shape of amphideal fovea, posterior origin of lateral field and large number of body annules.