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Morphological and Molecular Characterization of Tylenchorhynchus clarus Allen, 1955 and T. zeae Sethi & Swarup, 1968 (Rhabditida: Telotylenchidae) from Iraq

Ahmed Malik Jumaah
Ahmed Malik Jumaah
 et 
Sedighe Azimi
Sedighe Azimi
   | 19 oct. 2022
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Article Category: Research Paper
Publié en ligne: 19 oct. 2022
Pages: -
Reçu: 03 juin 2022
DOI: https://doi.org/10.2478/jofnem-2022-0043
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© 2022 Jumaah and Azimi., published by Sciendo.
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Light photomicrographs of Tylenchorhynchus clarus Allen, 1955 from Iraq. (A) Entire body; (B, C) Anterior body region; (D) Median bulb; (E, F) Terminal bulb (the arrow indicates the excretory pore); (G) Lateral field at mid-body; (H) Vulval region; (I–K) Posterior body region (the arrow indicates the phasmid). (Scale bars: A, 50 μm; B–K, 10 μm).
Light photomicrographs of Tylenchorhynchus clarus Allen, 1955 from Iraq. (A) Entire body; (B, C) Anterior body region; (D) Median bulb; (E, F) Terminal bulb (the arrow indicates the excretory pore); (G) Lateral field at mid-body; (H) Vulval region; (I–K) Posterior body region (the arrow indicates the phasmid). (Scale bars: A, 50 μm; B–K, 10 μm).

Figure 2

Light photomicrographs of Tylenchorhynchus zeae Sethi and Swarup, 1968 from Iraq. (A, C–K) Female. (A) Entire body; (C, D) Anterior body region; (E) Median bulb and isthmus; (F, G) Terminal bulb (the arrow indicates the excretory pore); (H) Lateral field at mid-body; (I) Vulval region; (J, K) Posterior body region (the arrow indicates the phasmid); (B, L, M) Male. (B) Entire body; (L, M) Posterior body region. (Scale bars: A and B, 50 μm; C–M, 10 μm).
Light photomicrographs of Tylenchorhynchus zeae Sethi and Swarup, 1968 from Iraq. (A, C–K) Female. (A) Entire body; (C, D) Anterior body region; (E) Median bulb and isthmus; (F, G) Terminal bulb (the arrow indicates the excretory pore); (H) Lateral field at mid-body; (I) Vulval region; (J, K) Posterior body region (the arrow indicates the phasmid); (B, L, M) Male. (B) Entire body; (L, M) Posterior body region. (Scale bars: A and B, 50 μm; C–M, 10 μm).

Figure 3

Bayesian 50% majority rule consensus tree inferred from analysis of the D2–D3 domains of the LSU rDNA sequences of Iraqi populations of Tylenchorhynchus clarus Allen, 1955 and T. zeae Sethi and Swarup, 1968 under the GTR + G + I model. Bayesian posterior probability values of >0.50 are given for appropriate clades. New sequences are indicated in bold.
Bayesian 50% majority rule consensus tree inferred from analysis of the D2–D3 domains of the LSU rDNA sequences of Iraqi populations of Tylenchorhynchus clarus Allen, 1955 and T. zeae Sethi and Swarup, 1968 under the GTR + G + I model. Bayesian posterior probability values of >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 ITS rDNA of Iraqi populations of Tylenchorhynchus clarus Allen, 1950 and T. zeae Sethi and Swarup, 1968 under the GTR + G + I model. Bayesian posterior probability values of >0.50 are given for appropriate clades. New sequences are indicated in bold.
Bayesian 50% majority rule consensus tree inferred from analysis of the ITS rDNA of Iraqi populations of Tylenchorhynchus clarus Allen, 1950 and T. zeae Sethi and Swarup, 1968 under the GTR + G + I model. Bayesian posterior probability values of >0.50 are given for appropriate clades. New sequences are indicated in bold.

Morphometrics of Tylenchorhynchus clarus Allen, 1955 and T. zeae Sethi and Swarup, 1968 from Misan province, Iraq. All measurements are in micrometer and in the form: mean ± s.d. (range).

Characters Tylenchorhynchus clarus Tylenchorhynchus zeae
Females Females Males
n 14 13 5
L 459.1 ± 34.9 (414–523) 534.2 ± 15.5 (501–570) 483.5 ± 23.9 (455–521)
a 28.4 ± 1.2 (25.7–29.7) 28.9 ± 0.7 (25.7–32.2) 31.2 ± 0.4 (30.5–31.9)
b 4.6 ± 0.4 (4.0–5.4) 4.7 ± 0.1 (4.6–5.0) 4.7 ± 0.3 (4.3–5.2)
c 16.4 ± 1.5 (14.6–19.4) 16.7 ± 2.7 (14.0–20.4) 16.9 ± 2.1 (14.8–18.2)
c' 2.5 ± 0.2 (2.1–2.8) 2.2 ± 0.3 (1.9–2.6) 2.2 ± 0.2 (2.1–2.4)
V 57.5 ± 3.6 (53.5–59.8) 57.4 ± 3.7 (55.4–61.9) –
Lip region height 3.1 ± 0.2 (2.8–3.2) 3.0 ± 0.2 (2.8–3.2) 2.7 ± 0.4 (2.4–3.3)
Lip region width 6.6 ± 0.4 (6.4–7.2) 5.7 ± 0.7 (5.5–7.3) 5.4 ± 0.4 (4.9–6.0)
DGO 1.9 ± 0.2 (1.3–2.4) 3.1 ± 0.1 (2.9–3.3) 3.1 ± 0.1 (2.9–3.3)
MB 51.2 ± 1.4 (46.6–55.8) 54.5 ± 1.9 (48.1–56.2) 53.3 ± 0.9 (52.2–54.7)
Stylet length 16.8 ± 1.6 (15.4–18.9) 18.2 ± 0.8 (16.7–19.2) 16.9 ± 0.6 (15.8–18.2)
Pharynx length 105.2 ± 4.8 (98–120) 113.3 ± 4 (106–117) 100.9 ± 6.4 (91–107)
Anterior end to excretory pore 76.9 ± 2.8 (72.8–86.8) 88.1 ± 3.2 (82–92) 76.2 ± 7.3 (70.5–87.1)
Maximum body width 16.2 ± 0.9 (15.2–17.6) 16.2 ± 0.4 (15.7–16.6) 15.4 ± 0.7 (14.9–16.6)
Anal body width 11.4 ± 0.9 (10.4–13.6) 12.4 ± 0.4 (11.6–14.2) 9.6 ± 0.9 (9.1–10.7)
Vulval body width 15.5 ± 0.9 (14.4–17.8) 17.5 ± 1.2 (14.6–19.2) –
Tail length 29.1 ± 1.6 (27.5–33.2) 30.8 ± 2.9 (25.2–38.2) 26.8 ± 2.6 (24.2–33.7)
Tail annuli 15.5 ± 1.3 (14–16) 17.5 ± 1.1 (16–21) –
Spicule length – – 17.5 ± 0.2 (16.1–18.9)
Gubernaculum – – 7.6 ± 0.3 (7.3–9.1)
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