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Description of Seinura italiensis n. sp. (Tylenchomorpha: Aphelenchoididae) found in the medium soil imported from Italy

Jianfeng Gu
Jianfeng Gu
, 
Munawar Maria
Munawar Maria
, 
Lele Liu
Lele Liu
 oraz 
Majid Pedram
Majid Pedram
   | 18 mar 2020
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Data publikacji: 18 mar 2020
Zakres stron: 1 - 11
Otrzymano: 12 wrz 2019
DOI: https://doi.org/10.21307/jofnem-2020-018
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© 2020 Jianfeng Gu et al., published by Sciendo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1:

Line drawings of Seinura italiensis n. sp. (A): pharynx; (B): female reproductive system; (C): anterior region; (D): male posterior body region (arrows showing the P1-P4 papillae); (E): lateral lines; (F): female tail; (G): spicule. (Scale bars = A – G = 10 μm).
Line drawings of Seinura italiensis n. sp. (A): pharynx; (B): female reproductive system; (C): anterior region; (D): male posterior body region (arrows showing the P1-P4 papillae); (E): lateral lines; (F): female tail; (G): spicule. (Scale bars = A – G = 10 μm).

Figure 2:

Light photomicrographs of Seinura italiensis n. sp. (A): entire female; (B): entire male; (C): lateral lines; (D, E): anterior region (arrows pointing on position of excretory pore); (F): vulval region; (G): female posterior region showing vulva and post-uterine sac; (H-J): female tail; (K, L): male tail (arrows showing position of caudal papillae); (M, N): spicules (Scale bars = A, B = 20 μm; C-N = 10 μm). exp = excretory pore; a = anus; P1 + P2 + P3 + P4 = caudal papillae.
Light photomicrographs of Seinura italiensis n. sp. (A): entire female; (B): entire male; (C): lateral lines; (D, E): anterior region (arrows pointing on position of excretory pore); (F): vulval region; (G): female posterior region showing vulva and post-uterine sac; (H-J): female tail; (K, L): male tail (arrows showing position of caudal papillae); (M, N): spicules (Scale bars = A, B = 20 μm; C-N = 10 μm). exp = excretory pore; a = anus; P1 + P2 + P3 + P4 = caudal papillae.

Figure 3:

Phylogenetic relationships of Seinura italiensis n. sp. as inferred from Bayesian analysis using the near full-length SSU rDNA under GTR+I+G model. The Bayesian posterior probability (BPP) values more than 50% are given for appropriate clades. New sequence is in bold font.
Phylogenetic relationships of Seinura italiensis n. sp. as inferred from Bayesian analysis using the near full-length SSU rDNA under GTR+I+G model. The Bayesian posterior probability (BPP) values more than 50% are given for appropriate clades. New sequence is in bold font.

Figure 4:

Phylogenetic relationships of Seinura italiensis n. sp. as inferred from Bayesian analysis using the near full-length LSU rDNA D2-D3 expansion segments under GTR+I+G model. The Bayesian posterior probability (BPP) values more than 50% are given for appropriate clades. New sequence is in bold font.
Phylogenetic relationships of Seinura italiensis n. sp. as inferred from Bayesian analysis using the near full-length LSU rDNA D2-D3 expansion segments under GTR+I+G model. The Bayesian posterior probability (BPP) values more than 50% are given for appropriate clades. New sequence is in bold font.

Morphometrics of Seinura italiensis n. sp.

Female Male
Character Holotype Paratypes Paratypes
n – 15 15
L 478 522 ± 36.3 (469 – 590) 477 ± 41 (407 – 565)
a 30.1 29.6 ± 1.6 (26.7 – 33.7) 31.4 ± 2.1 (28.6 – 36.3)
b 6.6 7.0 ± 0.4 (6.3 – 7.5) 6.7 ± 0.5 (5.9 – 7.6)
b′ 2.8 2.9 ± 0.2 (2.5 – 3.1) 3.1 ± 0.2 (2.8 – 3.5)
c 9.0 9.1 ± 1.3 (7.5 – 12.5) 12.5 ± 1.2 (10.5 – 14.6)
c′ 5.3 5.6 ± 0.7 (3.9 – 6.5) 3.6 ± 0.3 (3.1 – 4.2)
V or T 73.4 72.2 ± 1.5 (69.7 – 75.3) 43.2 ± 11.2 (28.1 – 73.9)
Lip region height 3.6 3.4 ± 0.4 (2.8 – 4.1) 3.0 ± 0.3 (2.5 – 3.6)
Lip region width 7.3 7.3 ± 0.4 (6.6 – 8.1) 6.8 ± 0.6 (5.8 – 8.0)
Stylet length 19.8 20.6 ± 1.6 (18.3 – 23.6) 17.4 ± 1.5 (14.5 – 20.1)
Body diam. 15.9 17.7 ± 1.4 (15.7 – 20.9) 15.2 ± 1.2 (13.3 – 16.9)
Median bulb width 9.6 10.2 ± 0.6 (9.4 – 11.8) 8.7 ± 0.7 (7.5 – 10.2)
Median bulb length 16.4 17.8 ± 1.5 (14.8 – 21.0) 15.4 ± 1.0 (13.8 – 17.4)
Median bulb length/diam. ratio 1.7 1.7 ± 0.1 (1.5 – 1.9) 1.8 ± 0.1 (1.6 – 2.0)
Excretory pore from anterior end 61.9 67.9 ± 4.9 (57.3 – 74.4) 65.5 ± 3.8 (55.2 – 69.1)
Ovary or testis length 175.6 180.2 ± 35.8 (113 – 232) 206.0 ± 54.5 (143 – 340)
Post-uterine sac 59.2 58.8 ± 5.6 (51.1 – 69.3) –
Vulva to anus distance 85.1 86.6 ± 7.4 (74.0 – 95.5) –
Post-uterine sac length/vulva to anus (%) 69.6 68.2 ± 7.7 (58.1 – 85.3) –
Anal (cloacal) body diameter 10.1 10.5 ± 0.7 (9.6 – 12.4) 10.7 ± 0.6 (9.6 – 11.6)
Tail length 53.1 58.3 ± 6.8 (43.6 – 72.0) 38.5 ± 4.5 (29.3 – 45.2)
Spicules (curved median line) – – 14.5 ± 1.0 (12.7 – 15.8)
Spicules (chord) – – 14.1 ± 0.8 (12.6 – 15.0)
Hemizonid from anterior end 90.7 84.4 ± 4.0 (77.6 – 91.8) 81.9 ± 4.5 (73.1 – 89.7)
Pharyngo-intestinal junction from anterior end 72.7 74.8 ± 3.6 (68.3 – 80.8) 71.0 ± 3.6 (63.5 – 76.0)
Pharyngeal gland from anterior end 170.7 182.1 ± 15.8 (156.8 – 222.2) 154.1 ± 10.6 (132.5 – 175.2)
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