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

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

Open Access
|Apr 2026

Figures & Tables

Figure 1

Line drawings of Coslenchus iranicus n. sp. from Iran. (a) Entire body; (b) anterior body region; (c) pharyngeal region; (d) lateral field at mid-body; (e) mid-body cross-section; (f) terminal bulb; (g and h) part of reproductive system; and (i and j) posterior body region.

Figure 2

Light photomicrographs of Coslenchus iranicus n. sp. from Iran. (a) Entire body; (b and c) anterior body region; (d) terminal bulb (the arrow indicates the excretory pore); (e) lateral field at mid-body; (f) cuticle showing longitudinal ridges; (g) mid-body cross-section; (h and i) vulval region; (j and k) part of reproductive system; and (l and m) posterior body region. Scale bars: (a) = 50 μm; (b–m) = 10 μm.

Figure 3

Bayesian 50% majority rule consensus tree inferred from analysis of the SSU rDNA sequences of Coslenchus iranicus n. sp. under the GTR + G + I model. BPP values more than 0.50 are given for appropriate clades. New sequences are indicated in bold.

Figure 4

Bayesian 50% majority rule consensus tree inferred from analysis of the D2–D3 domains of the LSU rDNA sequences of Coslenchus iranicus n. sp. under the GTR + G + I model. BPP values more than 0.50 are given for appropriate clades. New sequences are indicated in bold.

Figure 5

Bayesian 50% majority rule consensus tree inferred from analysis of the ITS rDNA sequence of Coslenchus iranicus n. sp. under the GTR + G + I model. BPP values more than 0.50 are given for appropriate clades. New sequences are indicated in bold.

Morphometrics of Coslenchus iranicus n_ sp_ from South Khorasan province, Iran_

CharacterHolotype femaleParatype females
n111
L501.5484.7 ± 24.6 (447–525)
a26.727.8 ± 1.3 (25.8–29.7)
b5.05.4 ± 0.6 (5–7)
c5.65.8 ± 0.5 (5.3–6.9)
c′9.28.5 ± 1.1 (6.9–10.8)
V66.667.2 ± 1.1 (66.0–69.8)
V′81.181.3 ± 0.6 (80.6–82.2)
Stylet length11.811.1 ± 0.9 (9.4–12.0)
m45.842.5 ± 5.1 (34.5–52.0)
DGO1.82.1 ± 0.2 (1.8–2.5)
Annuli width2.52.2 ± 0.2 (1.9–2.5)
MB4949.9 ± 1.1 (48.6–51.5)
Pharynx length10090.4 ± 6.8 (74.7–100.0)
Anterior end to excretory pore71.871.7 ± 5.1 (57–77)
Rst97.5 ± 0.9 (6–9)
Rex3333.1 ± 2.7 (25–35)
Roes4541.8 ± 2.7 (35–45)
Rv141137.2 ± 4.2 (130–142)
Ran171168.2 ± 4.5 (161–173)
Rvan3031.0 ± 1.2 (30–34)
Lip region-vulva334325.6 ± 14.7 (303–350)
Lip region-anus411.8400.6 ± 19.0 (368–412)
Maximum body width18.817.8 ± 0.9 (16.3–19.0)
Vulval body width15.715.3 ± 0.6 (14.3–15.8)
Vulva-anus77.875.0 ± 4.9 (65.5–83.0)
Tail length89.784.1 ± 8.5 (66.3–93.4)
Tail/vulva-anus1.21.1 ± 0.1 (0.9–1.2)
DOI: https://doi.org/10.2478/jofnem-2026-0010 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
Language: English
Page range: 55 - 65
Submitted on: Feb 24, 2026
Accepted on: Apr 3, 2026
Published on: Apr 27, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 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.