title: Paurodontella parapitica n. sp. (Nematoda: Hexatylina, Sphaerularioidea) from Kermanshah Province, Western Iran.
abstract: Paurodontella parapitica n. sp., collected from the rhizosphere of an apple tree in Kermanshah province, western Iran, is described. The new species is characterized by a body length of 505 to 723 µm (females) and 480 to 600 µm (males), lip region continuous by depression; 7 to 8 μm broad, 3 to 4 µm high, stylet length 7 to 9 µm or 1 to 1.3 times the lip region diameter, short postuterine sac of 4 to 6 μm long, lateral fields with five to six incisures; outer incisures crenated and inner incisures weakly crenated, excretory pore situated 90 to 100 µm from anterior end; functional males common in the population, with spicules 24 to 26 μm long. Tail of both sexes similar, almost straight and elongate-conoid. The new species resembles in morphology and morphometrics to four known species of the genus, namely P. apitica, P. minuta, P. myceliophaga, and P. sohailai. The results of phylogenetic analyses based on sequences of D2/D3 expansion region of 28S rRNA gene revealed this genus is polyphyletic in four different clades in Tylenchid.
authors.affiliation: Department of Plant Protection, College of Agriculture and Natural resources, University of Tehran, Karaj, Iran.
authors.forename: Mehrab
authors.initials: M
authors.lastname: Esmaeili
authors.affiliation: Department of Plant Protection, College of Agriculture and Natural resources, University of Tehran, Karaj, Iran.
authors.forename: Ramin
authors.initials: R
authors.lastname: Heydari
authors.affiliation: Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture and Consumer Services, Raleigh, NC 27607.
authors.forename: Weimin
authors.initials: W
authors.lastname: Ye
keywords: 28S D2/D3; molecular phylogeny; morphology; new species; taxonomy