Description of Allodorylaimus tuccitanus sp. nov., with updated taxonomy of the genus (Nematoda: Dorylaimida: Qudsianematidae)

A new species of the nematode genus Allodorylaimus, found in natural habitats of the south-eastern Iberian Peninsula, is described. Allodorylaimus tuccitanus sp. nov. is characterised by its 1.51-1.69 mm long body, lip region hardly offset by depression or almost continuous and 14.0-15.5 mu m wide, odontostyle 13.0-15.5 mu m long, neck 321-417 mu m long, pharyngeal expansion occupying 43-49% of the total neck length, presence of dorsal cell mass at level of cardia, female genital sytem diovarian, plicate sphincter, uterus bipartite and 101-207 mu m or 2.0-3.6 body diameters long, V = 48-52, tail conical (38-45 mu m, c = 34-42, c' = 1.4-1.6), spicules 55-59 mu m long, and 11 spaced ventromedian supplements without hiatus. The taxonomy of the genus is updated, including a diagnosis, list of species, key to their identification, and compendium of their most relevant morphometric features.