Description and molecular characterization of Coslenchus iranicus n. sp. (Rhabditida: Tylenchidae) from Iran

Nasrin Noras Mofrad; Sedighe Azimi

doi:10.2478/jofnem-2026-0010

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Description and molecular characterization of Coslenchus iranicus n. sp. (Rhabditida: Tylenchidae) from Iran

Journal of Nematology

Volume 58 (2026): Issue 1 (February 2026)

By: Nasrin Noras Mofrad and Sedighe Azimi

Open Access

|Apr 2026

Abstract

Coslenchus iranicus n. sp., recovered from the rhizosphere of soapwort in South Khorasan province, Eastern Iran, is described based on morphological and molecular data. The new species is characterized by its cuticle with 18 longitudinal ridges excluding lateral lines, lateral field with three incisures, lip region unstriated, stylet 9.4–12.0 µm long, spermatheca filled with sperm, post-vulval uterine sac absent, vulva with large vulval flaps, and tail mostly with a pointed terminus, though in a few specimens with a finely rounded tip. Based on general characterization, C. iranicus n. sp. is closely similar to C. areolatus, C. franklinae, C. japonicus, C. leiocephalus, and C. maritus. The phylogenetic relationships of the new species with representatives of the family Tylenchidae were reconstructed and discussed using partial sequences of the small subunit, D2–D3 expansion segments of the large subunit, and internal transcribed spacer regions of ribosomal DNA based on Bayesian inference. In the SSU rDNA and LSU rDNA phylogenetic trees, sequences of the new species formed clades with corresponding sequences of C. polonicus and C. leiocephalus with different levels of relatedness, respectively.

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Articles in this issue

DOI: https://doi.org/10.2478/jofnem-2026-0010 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X

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Language: English

Page range: 55 - 65

Submitted on: Feb 24, 2026

Accepted on: Apr 3, 2026

Published on: Apr 27, 2026

Published by: Society of Nematologists, Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

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© 2026 Nasrin Noras Mofrad, Sedighe Azimi, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 58 (2026): Issue 1 (February 2026)