Redescription of Xiphinema artemisiae Chizhov, Tiev & Turkina, 1986 (Dorylaimida: Longidoridae): new occurrence in Iran

Abstract

A population of Xiphinema artemisiae was recovered from Iran, representing the first report after its original description from a meadow pasture in northern Caucasus, Russia. The Iranian population was recovered from the rhizosphere of grasses in the Damavand region, Tehran province. The females of the recovered populations are characterised by a lip region separated from the rest of body by a depression, a 5.1-5.6 mm long body, a 129-138 μm long odontostyle, 76-85 μm long odontophore, a uterus having a pseudo-Z-organ and crystalloid bodies observed in some specimens, and a short, rounded, dorsally more convex tail with a subcentral mucron, four juvenile developmental stages (the first stage was not recovered) and functional males. The Iranian population is morphologically and morphometrically similar to the type population and minor morphological differences can be attributed to geographical interpopulation differences. Molecular phylogenetic relationships of the Iranian population of X. artemisiae with other species were reconstructed using sequences of three genomic ribosomal markers, viz. small, large subunit D2-D3 and internal transcribed spacer (SSU, LSU D2-D3 and ITS) rDNA.