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Keywords
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morphometrics, phylogeny, taxonomy, Xiphinema hyrcaniense, Xiphinema sangesarense.
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Abstract
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Summary – 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.
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