The comparison of anterior region in males of populations of observed Meloidogyne species. A an unknown Irish species (ventral position) B type material of M. fallax (lateral position); C: type material of M. chitwoodi (ventral position) D reference material of M. hapla (lateral position) E reference material of M. incognita (lateral position) F type material of M. minor (lateral position). Scale bar = 20 µm.