Table 1.
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) |
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).
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).
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.
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.