Description of Rhyssocolpus vinciguerrae sp n. (Dorylaimida, Nordiidae) from Iran and the first molecular study of this genus

Rhyssocolpus vinciguerrae sp. n., from natural habitats in Iran, is described, illustrated and sequenced. It is characterised by the body length of 1.04-1.37 mm, lip region offset by depression and 11-13 mu m broad, odontostyle 8-10 mu m or 0.7-0.8 times the lip region diam. long, neck 227-265 mu m long, pharyngeal expansion 80-95 mu m long or 31-35% of total neck length, a dorsal cell mass present between cardia and the end of the anterior ovary/testis, uterus bipartite, 90-170 mu m long, vulva longitudinal (V = 48-55), abundant irregularities in body cuticle around vulva, female tail conical with rounded terminus (35-55 mu m, c = 24-34, c' = 1.4-1.9), spicules 43-51 mu m long and 6-8 spaced ventromedian supplements located outside the range of the spicules. It is very similar to R. aquilonius, R. arcticus and R. iuventutis. A molecular characterisation of the new species was done on ribosomal DNA near-full-length small subunit 18S gene, internal transcribed spacer and partial 5.8S gene. The results obtained support a close relationship between Rhyssocolpus and Heterodorus, and a more distant relationship with Enchodelus.