Description of Ditylenchus azarbaijanensis n. sp. (Tylenchomorpha: Anguinidae) from West Azarbaijan province, northwest Iran

Khakbaz, Fatemeh; Gharibzadeh, Farshad; Atighi, Mohammad Reza; Pedram, Majid

doi:10.48311/jcp.2021.1558

Description of Ditylenchus azarbaijanensis n. sp. (Tylenchomorpha: Anguinidae) from West Azarbaijan province, northwest Iran

https://doi.org/10.48311/jcp.2021.1558

Volume 10, Issue 3
September 2021

Pages 575-583

Document Type : Original Research

Authors

F. Khakbaz ¹

F. Gharibzadeh ¹

M. R. Atighi ¹

M. Pedram ²

¹ Department of Plant Pathology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.

² Department of Plant Pathology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran. Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.

Abstract

Ditylenchus azarbaijanensis n. sp. is described and illustrated based upon morphological and morphometric characters. The new species is mainly characterized by having six lines in the lateral field, rudimentary postuterine sac (PUS) ca. 0.2 vulval body width long, anteriorly inclined vagina and conical female tail with a pointed terminus, 48-70 µm long (c = 15-21, cʹ = 2.4-3.7). It is further characterized by having fine stylet 7.5-10.0 µm long with small knobs, small pyriform pharyngeal bulb offset from the intestine, and males with 26.5-31.0 µm long spicules. By having a rudimentary PUS, the new species is morphologically compared with three closely related species, namely Ditylenchus apus, D. deiridus and D. khani. Moreover, morphological differences of the new species with eight similar species of the genus, namely D. arachis, D. convallarie, D. dauniae, D. medicaginis, D. silvaticus, D. tenuidens, D. valveus, and D. virtudesae are presented. The status of the rudimentary or absent PUS of D. deiridus and the new species is also discussed.

Keywords

Diptenchus

Ditylenchus deiridus

D. khani

morphology

morphometric data

new species

Taxonomy

Subjects

Plant Nematology

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