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Discopersicus hexagrammatus n. sp. (Rhabditida: Tylenchidae), the second species of the genus

Manouchehr Hosseinvand
Manouchehr Hosseinvand
, 
Ali Eskandari
Ali Eskandari
, 
Joaquín Abolafia
Joaquín Abolafia
 oraz 
Reza Ghaderi
Reza Ghaderi
   | 26 paź 2021
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Data publikacji: 26 paź 2021
Zakres stron: 1 - 10
DOI: https://doi.org/10.21307/jofnem-2021-059
Słowa kluczowe
© 2021 Manouchehr Hosseinvand et al., published by Sciendo.
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Discopersicus hexagrammatus n. sp. (light microscopy), female (A, C, D, F, G, I-K) and male (B, E, H). A and B: Entire body; C-E: Anterior end; F: Amphidial aperture; G: Pharyngeal region; H: Cloacal region; I: Lateral field; J: Vulval slit; K: Tail. (Scale bars: A, B = 100 µm; C-H, J, K = 10 µm; I = 5 µm).
Discopersicus hexagrammatus n. sp. (light microscopy), female (A, C, D, F, G, I-K) and male (B, E, H). A and B: Entire body; C-E: Anterior end; F: Amphidial aperture; G: Pharyngeal region; H: Cloacal region; I: Lateral field; J: Vulval slit; K: Tail. (Scale bars: A, B = 100 µm; C-H, J, K = 10 µm; I = 5 µm).

Figure 2:

Discopersicus hexagrammatus n. sp. (drawing), female (A, C-F) and male (B, G). A and B: Entire body; C: Pharyngeal region; D: Anterior end; E: Reproductive system; F and G: Tail.
Discopersicus hexagrammatus n. sp. (drawing), female (A, C-F) and male (B, G). A and B: Entire body; C: Pharyngeal region; D: Anterior end; E: Reproductive system; F and G: Tail.

Figure 3:

Discopersicus hexagrammatus n. sp. (scanning electron microscopy), female (A-H, L) and male (I, J, M). A-C: Cephalic region in lateral view (black arrows indicated amphidial apertures); D: Excretory pore in ventral view (white arrow indicated excretory pore); E: Lateral field; F and G: Vulva in ventral view; H-J: Posterior end (black arrow indicating the anus); L: Anus; M: Cloacal aperture.
Discopersicus hexagrammatus n. sp. (scanning electron microscopy), female (A-H, L) and male (I, J, M). A-C: Cephalic region in lateral view (black arrows indicated amphidial apertures); D: Excretory pore in ventral view (white arrow indicated excretory pore); E: Lateral field; F and G: Vulva in ventral view; H-J: Posterior end (black arrow indicating the anus); L: Anus; M: Cloacal aperture.

Figure 4:

Bayesian 50% majority rule consensus tree inferred from D2-D3 expansion segments of 28S rDNA sequences of Discopersicus hexagrammatus n. sp. under the GTR + I + G model. Posterior probabilities more than 50% are given for appropriate clades. Newly obtained sequences in this study are in bold letters.
Bayesian 50% majority rule consensus tree inferred from D2-D3 expansion segments of 28S rDNA sequences of Discopersicus hexagrammatus n. sp. under the GTR + I + G model. Posterior probabilities more than 50% are given for appropriate clades. Newly obtained sequences in this study are in bold letters.

Morphometric data of Discopersicus hexagrammatus n. sp. from Iran.

Holotype female Paratype females Paratype males
n – 8 CV 7 CV
L (µm) 705 688.0 ± 36.2 (612-734) 5.2 612.0 ± 8.8 (601-623) 1.4
a 37.1 35.3 ± 1.4 (34.0-37.5) 4.2 34.8 ± 2.1 (32.5-38.1) 6.1
b 6.5 6.2 ± 0.2 (5.8-6.5) 3.6 13.9 ± 0.2 (13.5-14.3) 1.8
c 11.0 10.1 ± 0.6 (9.0-11.0) 6.0 9.4 ± 0.3 (8.8-9.8) 4.0
c′ 9.1 9.5 ± 0.6 (8.9-10.5) 6.7 8.4 ± 0.5 (7.6-9.0) 6.6
V 67 66.1 ± 0.7 (65-67) 1.0 – –
V′ 73 73.4 ± 1.0 (72-75) 1.4 – –
Stylet length 10 10.3 ± 0.3 (10-11) 3.0 10.2 ± 0.3 (10-11) 3.3
m (conus/stylet %) 35 33.6 ± 1.1 (32-35) 3.4 33.1 ± 0.5 (33-34) 1.6
Anterior end to valve of median bulb 39 42.0 ± 2.2 (39-45) 5.4 40.8 ± 2.7 (38-44) 6.8
(Anterior end to pharyngeal intestinal junction) Pharynx length 108 111.0 ± 4.0 (105-117) 3.6 111.0 ± 3.5 (107-115) 3.1
M.B. 36 37.8 ± 0.9 (36-39) 2.4 36.7 ± 1.3 (35-39) 3.8
Anterior end to excretory pore 89 88.2 ± 1.8 (85-90) 2.0 86.6 ± 1.6 (84-88) 1.9
Anterior end to vulva 470 455.0 ± 22.5 (408-485) 4.9 – –
Anterior end to anus 641 620.0 ± 33.5 (551-658) 5.4 547.0 ± 7.7 (540-557) 1.4
Vulva-anus distance 171 165.0 ± 13.2 (143-183) 8.0 – –
Tail length/Vulva-anus distance 0.4 0.4 ± 0.1 (0.3-0.5) 10.5 – –
Body width at midbody 19 19.5 ± 1.0 (18-21) 5.4 17.6 ± 1.1 (16-19) 6.4
Vulval body width 18 18.0 ± 0.7 (17-19) 4.1 – –
Anal body width 7 7.1 ± 0.4 (7-8) 3.1 7.6 ± 0.2 (7-8) 2.8
Tail length 64 68.0 ± 5.2 (61-76) 7.6 64.6 ± 3.0 (61-69) 4.7
Spicules – – – 16.1 ± 0.5 (16-17) 3.4
Gubernaculum – – – 5.4 ± 0.2 (5-6) 4.2
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Język:
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