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Morphological and molecular characterization of two species of Neothada Khan, 1973 (Nematoda: Tylenchidae) from Iran, with notes on N. cancellata Cover

Morphological and molecular characterization of two species of Neothada Khan, 1973 (Nematoda: Tylenchidae) from Iran, with notes on N. cancellata

Open Access
|Feb 2021

Figures & Tables

Table 1.

Morphometric data of Neothada major, N. hades and N. cancellata from Iran.

Neothada majorN. hadesN. cancellata
Present studyMaqbool and Shahina (1989)Present studyHeyns and Van den Berg (1996)Present study
n15cv1510cv108
L657±40.6 (600–728)6.1640–800586±50.3 (505–674)8.5530–620561±32.5 (501–596)
L'579±37.8 (521–645)6.5–515±48.1 (440–600)9.3–491±30.9 (431–527)
Head-Vulva461±27.2 (420–508)5.9–414±35.5 (354–467)8.5–396±24.4 (349–424)
R Head-Vulva142±11.7 (120–160)8.2154–156147±8.3 (127–157)5.6–146±9.9 (125–156)
R Head-Anus174±12.4 (149–194)7.1–175±9.2 (152–185)5.2–173± 11.1 (150–185)
Stylet10.9±0.3 (10.3–11.7)3.312–14.410.5±0.2 (10.0–10.8)2.19.0–10.510.8±0.2 (10.6–11.2)
a35.9±4.1 (29–44)11.434–3930.3±2.0 (27.0–33.7)6.825–3129.5±1.7 (27–32)
b5.7±0.4 (5.2–6.5)6.95.9–6.35.3±0.2 (4.8–5.7)5.45.3–6.45.2±0.2 (4.7–5.5)
c8.3±0.3 (7.5–8.7)3.79.0–10.28.3±0.4 (7.5–9.1)5.88.1–10.38.0±0.3 (7.5–8.6)
c'6.4±0.3 (5.6–7.1)6.15.5–6.06.0±0.3 (5.5–6.5)5.84.6–6.06.1±0.4 (5.5–6.6)
V70.2±0.7 (68.8–71.2)1.070–7370.6±1.1 (68.5–72.7)1.670–7470.9 ± 0.6 (70.0–71.8)
V'79.7±0.9 (78.0–81.1)1.1–80.3±1.3 (77.0–81.9)1.6–80.8±0.5 (80.4–82.4)
R202±12.5 (175–222)6.2215–245204±10.1 (179–216)4.9149–160189± 12.3 (175–191)
Excretory pore97.2±8.7 (75–110)9.0–94.7±5.8 (87–104)6.1–92.5±6.7 (86–100)
Pharynx114±7.6 (94–127)6.7108–133109.5±8.4 (95–119)7.7–107±9.3 (90–110)
R Pharynx41±3.0 (36–50)7.245–5047±3.1 (43–52)6.630–3845±2.5 (42–50)
Annulus width3.8±0.7 (3.2–5.6)20.03.2–4.02.9±0.2 (2.7–3.5)8.34.0–4.63.0±0.2 (2.6–3.6)
Body width18.4±1.7 (15.6–21.0)9.6–19.2±0.8 (17.8–21.0)4.5–18.8±0.6 (18–20)
Vulva body width17.5±1.5 (15–20)9.0–17.9±0.7 (16.5–19.0)4.0–17.5±0.7 (15.5–18.8)
Vulva-Anus117±11.8 (101–137)10.0–101.6±14.9 (86–138)14.795±7.1 (81–103)
R Vulva-Anus32±3.8 (28–42)11.836–4027±1.4 (25–29)5.421–2627±1.5 (25–28)
Tail/Vulva-Anus0.6±0.1 (0.6–0.7)7.7–0.7±0.1 (0.5–0.7)10.1–0.7±0.1 (0.6–0.7)
Anal body width12.2±0.9 (10.8–14.0)7.3–11.5±0.5 (10.8–12.3)4.7–11.1±0.5 (10.5–12.0)
Tail length78.2±3.5 (70–83)4.567–8070.4±2.7 (65–74)3.955–6669±2.4 (65–71)

1 Note: All measurements are in μm and in the form: mean ± standard deviation (range).

Figure 1:

Iranian population of Neothada hades. Female (A-I): (A) Entire body; (B) Anterior end and pharyngeal region; (C) Lip region and stylet; (D) Stylet; (E) Reproductive system; (F) Amphidial aperture; (G) Cross section from mid-body; (H-I) Posterior end.

Figure 2:

Iranian population of Neothada hades. Female (A-K): (A) Entire body; (B-D) Lip region and stylet; (E) Amphidial aperture; (F) Cross section from mid-body; (G) Basal pharyngeal bulb and secretory-excretory pore; (H) Deirid and lateral field; (I-K) Posterior end. (Scale bars: A = 100 µm; B-K = 10 µm).

Figure 3:

Iranian population of Neothada major. Female (A-I): (A) Entire body; (B) Anterior end and pharynx; (C) Lip region; (D) Stylet; (E) Amphidial aperture; (F) Cross section from mid-body; (G-H) Posterior end; (I) Reproductive system.

Figure 4:

Iranian population of Neothada major. Female (A-N): (A) Entire body; (B) Anterior end and pharyngeal region; (C-F) Lip region and stylet; (G) Amphidial aperture; (H) Annules at mid-body; (I) Vulval region; (J-L) Posterior end; (M, N) Cross section from mid-body. (Scale bars: A = 100 µm; B-N = 10 µm).

Figure 5:

Iranian population of Neothada cancellata. Female (A-N): (A) Entire body; (B-F) Anterior end and stylet; (G) Vulval region; (H) Cross section from mid-body; (I-N) Posterior end.

Figure 6:

Bayesian Inference analysis tree under general time-reversible model of sequence evolution with correction for invariable sites and a gamma-shaped distribution model (GTR + I + G) from known and the newly sequenced Neothada hades and N. major based on sequences of the D2-D3 expansion fragments of the 28 S rDNA region. Bayesian posterior probabilities (50%) are given for each clade. Scale bar shows the number of substitutions per site.

DOI: https://doi.org/10.21307/jofnem-2020-131 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
Language: English
Page range: 1 - 10
Published online: Feb 2, 2021
Published in print: Jan 1, 2020
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2021 Manouchehr Hosseinvand, Ali Eskandari, Reza Ghaderi, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.