Morphometrics of Longidorus juvenilis and first record of L. aetnaeus and L. moesicus (Nematoda: Dorylaimida) from Serbia.

Specimens of Longidorus aetnaeus, L. juvenilis and L. moesicus collected from various habitats in Serbia are studied. Brief descriptions, measurements and illustrations of the species are provided. Males and juvenile developmental stages of L. juvenilis are also reported. Longidorus aetnaeus and L. moesicus are recorded from Serbia for the first time.