Further Studies on Soil Nematode Fauna in North Western Iran with the Description of One New Species

摘要

Heterodorusyoubertghostain.sp.isdescribedandillustratedbasedonmorphological,morphometric,andmoleculardata.Thenew species was found in two geographically distant points in northwestern Iran and is characterized by having angular lip region, separated fromtherestbodybyaconstriction,bodylengthof1,432.5to1,751.3 mm,odontostylelengthof24to28 mm,rod-likeodontophore,37.0to 42.5 mm long, lacking ?anges at base, double guiding ring at 14 to 16 mm distance from anterior end, pharyngeal bulb comprising 40% to 48% of pharynx, intestine usually containing green material, female reproductive system amphidelphic with less divided short uterus, speci?cstructureofparsdistalisvaginae,bluntlyconicaltail,dorsallyconvexandventrally?at,withroundedtipandsaccatebodiesinventral side.Thenewspeciescomesmore closeto H.conicaudatus and H.irregularis byits morphologyandmorphometric characters.Comparedto former, it has remarkable difference in vulva position and tail characters, and compared to the latter, it could be separated by shorter body, posteriorly located vulva, wider lip region, and longer tail.In phylogenetic analyses using partial sequences of 28S rDNA D2-D3, the new species formed a fully supported clade with several isolates of H.brevidentatus, prevalent in Iran.The other nordiid taxon, Enchodorus dolichurus, already reported from Iran, was also sequenced for the same genomic region and included in phylogenetic analyses.