NEMATODES FROM ITALIAN SAND DUNES. 4. FOUR NEW AND ONE RARE SPECIES OF DORYLAIMINA

Abstract

Four new and one known species of Dorylaimida (Nematoda), found in coastal sand dunes in Sicily (Italy), are described and illustrated. Aporcelaimellus littoralis sp. n. is characterized by its expanded lip region, presence of numerous ventral and dorsal papillae, odontostyle 13-15 µm long, tail conoid with sub-digitate terminus, eight to ten precloacal papillae in male. Longidorella longicaudata sp. n. is characterized by its small size, lip region set off from adjoining body, odontostyle 20-25 µm long, tail relatively long. Longidorella obtusicaudata sp. n. is characterized by its medium size, lip region well set off from adjoining body, odontostyle 33-37 µm long, tail very short, conoid, with bluntly rounded terminus. Longidorella parvibulbata sp. n. is characterized by its moderately small size, lip region well set off from adjoining body, odontostyle 18-21 µm long, expanded part of pharynx very short, bulb-like, tail straight, conoid, with rounded terminus. The male of Meylis hunti Siddiqi, 1995 is described for the first time.