Hemicriconemoides macrodorus n. sp with observations on two other species of the genus (Nematoda : Criconematidae)

Hemicriconemoides macrodorus n. sp. is described and illustrated from a bis exual population collected in a natural habitat at Santa Elena, Jaen, south ern Spain. The new species falls into the 'group 2', based on lip patterns (Decraemer & Geraert, 1992), which contains 13 other species characterised by a cephalic region with an offset, raised, narrower oral disc, followed b y broader head annuli. The main distinctive characters of the new species a re: lip region truncate, very long styler (90-100 mum), long body 548-750 m um, R = 127-148, conical tail, VL/VB = 1.0-1.5, spined juvenile cuticular o rnamentation (multispined scales, indented at their edges) arranged in ten alternate rows, and male lateral field with four incisures. Morphometric da ta, illustrations and brief descriptions are presented for an Italian popul ation of H. ortonwilliamsi Ye & Siddiqi, 1994, while, for the first time, m orphometric data and illustrations are given for the male and the juvenile of H. alexis Vovlas, 1980.