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Aphelenchus yinyuensis n. sp. (Tylenchina: Aphelenchoididae) found in Terminalia sp. in China

Gu Jianfeng

Gu Jianfeng

Technical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy)Ningbo, Zhejiang, P. R. China
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Jianfeng, Gu
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Munawar Maria

Munawar Maria

Laboratory of Plant Nematology, Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang UniversityHangzhou, Zhejiang, P. R. China
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Maria, Munawar
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Yiwu Fang

Yiwu Fang

Technical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy)Ningbo, Zhejiang, P. R. China
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Fang, Yiwu
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Liu Lele

Liu Lele

Technical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy)Ningbo, Zhejiang, P. R. China
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Lele, Liu
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Xianfeng Chen

Xianfeng Chen

Technical Centre of Ningbo Customs (Ningbo Inspection and Quarantine Science Technology Academy)Ningbo, Zhejiang, P. R. China
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Chen, Xianfeng
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Bo Cai

Bo Cai

Hainan Province Engineering Research Center for Quarantine, Prevention and Control of Exotic Pests, Haikou Customs DistrictHaikou, P. R. China.
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Cai, Bo
  
03 sept 2020
Aphelenchus yinyuensis n. sp. (Tylenchina: Aphelenchoididae) found in Terminalia sp. in China's Cover Image
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Publicado en línea: 03 sept 2020
Páginas: 1 - 12
DOI: https://doi.org/10.21307/jofnem-2020-085
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© 2020 Gu Jianfeng et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Aphelenchus yinyuensis n. sp. A: Entire male; B: Entire female; C: Anterior region; D: Lip region; E: Vulval region lateral view; F: Vulval region ventral view; G: Female reproductive system; H, I: Female tails; J: Male tail. Scale bars (A, B = 20 μm; C-J = 10 μm).
Aphelenchus yinyuensis n. sp. A: Entire male; B: Entire female; C: Anterior region; D: Lip region; E: Vulval region lateral view; F: Vulval region ventral view; G: Female reproductive system; H, I: Female tails; J: Male tail. Scale bars (A, B = 20 μm; C-J = 10 μm).

Figure 2:

Light photomicrographs of Aphelenchus yinyuensis n. sp. A: Entire male; B: Entire female; C: Anterior region: D: Lip region; E: Lateral lines; F: Vulval region lateral view; G: Vulval region ventral view; H: Vulval region with post-uterine sac; I: Female reproductive system; J, K: Female tails; L, M: Male tail showing papillae arrangement (arrowheads). (ex = excretory pore; h = hemizonid; P + number = genital papillae; scale bars = A, B = 20 μm; C-M = 10 μm).
Light photomicrographs of Aphelenchus yinyuensis n. sp. A: Entire male; B: Entire female; C: Anterior region: D: Lip region; E: Lateral lines; F: Vulval region lateral view; G: Vulval region ventral view; H: Vulval region with post-uterine sac; I: Female reproductive system; J, K: Female tails; L, M: Male tail showing papillae arrangement (arrowheads). (ex = excretory pore; h = hemizonid; P + number = genital papillae; scale bars = A, B = 20 μm; C-M = 10 μm).

Figure 3:

Phylogenetic relationship of Aphelenchus yinyuensis n. sp. and other nematodes based on near full length 18S of rDNA. Bayesian tree inferred from 18S under GTR + I + G model (lnL = −19,759.9398; freqA = 0.2462; freqC = 0.2010; freqG = 0.2710; freqT = 0.2818; R(a) = 1.1079; R(b) = 2.1894; R(c) = 1.2504; R(d) = 0.7956; R(e) = 3.9256; R(f) = 1.0000; Pinvar = 0.1260; Shape = 0.5890). Posterior probability values exceeding 50% are given on appropriate clades.
Phylogenetic relationship of Aphelenchus yinyuensis n. sp. and other nematodes based on near full length 18S of rDNA. Bayesian tree inferred from 18S under GTR + I + G model (lnL = −19,759.9398; freqA = 0.2462; freqC = 0.2010; freqG = 0.2710; freqT = 0.2818; R(a) = 1.1079; R(b) = 2.1894; R(c) = 1.2504; R(d) = 0.7956; R(e) = 3.9256; R(f) = 1.0000; Pinvar = 0.1260; Shape = 0.5890). Posterior probability values exceeding 50% are given on appropriate clades.

Figure 4:

Phylogenetic relationship of Aphelenchus yinyuensis n. sp. and other nematodes based on 28S D2 to D3 of rDNA. Bayesian tree inferred from 28S D2 to D3 under GTR + I + G model (lnL = −17,543.4883; freqA = 0.1670; freqC = 0.1883; freqG = 0.3314; freqT = 0.3134; R(a) = 1.3541; R(b) = 3.5721; R(c) = 1.7006; R(d) = 0.5742; R(e) = 4.6218; R(f) = 1.0000; Pinvar = 0.1400; Shape = 0.6940). Posterior probability values exceeding 50% are given on appropriate clades.
Phylogenetic relationship of Aphelenchus yinyuensis n. sp. and other nematodes based on 28S D2 to D3 of rDNA. Bayesian tree inferred from 28S D2 to D3 under GTR + I + G model (lnL = −17,543.4883; freqA = 0.1670; freqC = 0.1883; freqG = 0.3314; freqT = 0.3134; R(a) = 1.3541; R(b) = 3.5721; R(c) = 1.7006; R(d) = 0.5742; R(e) = 4.6218; R(f) = 1.0000; Pinvar = 0.1400; Shape = 0.6940). Posterior probability values exceeding 50% are given on appropriate clades.

Morphometrics of Aphelenchus yinyuensis n_ sp_

Female Male
Character Holotype Paratypes Paratypes
n – 15 15
L 792 793 ± 71.9 (639-877) 756 ± 59.6 (647-863)
a 31.0 30.5 ± 2.7 (26.9-33.6) 31.9 ± 3.4 (26.7-37.0)
b 9.6 7.7 ± 1.0 (6.2-8.8) 7.5 ± 0.7 (6.1-8.7)
b′ 5.0 4.8 ± 0.6 (3.9-5.7) 4.5 ± 0.4 (3.8-5.3)
c 19.5 21.0 ± 3.1 (16.7-27.1) 26.7 ± 2.6 (22.1-30.4)
c′ 3.1 2.7 ± 0.4 (2.3-3.8) 1.8 ± 0.2 (1.5-2.2)
V or T 72.7 72.8 ± 3.8 (65.2-77.6) 70.5 ± 7.1 (59.4-89.0)
Lip region height 3.1 3.6 ± 0.3 (3.1-4.2) 3.4 ± 0.5 (2.5-4.2)
Lip region width 8.3 8.8 ± 0.5 (8.1-9.5) 8.5 ± 0.5 (7.8-9.5)
Stylet length 13.7 14.3 ± 0.7 (13.2-15.2) 13.8 ± 1.0 (12.2-15.7)
Body diam. 25.5 26.2 ± 3.1 (19.2-31.7) 23.9 ± 2.1 (19.2-28.2)
Median bulb width 15.3 16.1 ± 1.5 (13.1-19.6) 13.8 ± 1.0 (12.2-15.7)
Median bulb length 22.5 22.3 ± 1.8 (18.6-24.5) 20.1 ± 1.2 (17.8-21.9)
Median bulb length/diam. Ratio 1.5 1.4 ± 0.1 (1.2-1.5) 1.5 ± 0.1 (1.3-1.7)
E. pore from anterior end 113.6 107.9 ± 7.2 (96.6-123.3) 106.5 ± 7.2 (91.5-116.7)
Ovary length or Testis 436.3 407.4 ± 50.2 (280.2-458.3) 531.4 ± 54.1 (452.6-610.9)
Post-uterine sac 112.1 100.7 ± 15.5 (66.3-120.2) –
Vulva to anus distance 176.3 166.9 ± 22.3 (131.2-195.0) –
Post-uterine sac length/vulva to anus (%) 63.6 60.9 ± 10.4 (44.5-82.7) –
Anal (cloacal) body diameter 13.1 14.2 ± 2.0 (10.6-17.3) 15.4 ± 1.0 (13.9-17.3)
Tail length 40.6 38.4 ± 5.9 (24.2-44.9) 28.4 ± 2.4 (23.6-32.2)
Spicule (curved median line) – – 28.0 ± 2.0 (24.3-31.3)
Spicule (Chord) – – 28.7 ± 1.7 (25.8-32.3)
Gubernaculum – – 13.2 ± 0.4 (12.2-13.7)
Hemizonid 115.3 110.1 ± 5.5 (100.1-117.3) 108.5 ± 7.3 (96.1-121.3)
Head to pharyngo-intestinal junction 92.9 103.2 ± 6.9 (91.0-113.5) 100.6 ± 5.5 (86.0-109.3)
Head to pharyngeal gland end 159.6 163.9 ± 12.1 (139.6-181.0) 165.9 ± 12.0 (149.3-188.2)
Vulva to tail terminus 203.1 213.1 ± 28.6 (156.3-251.8) –
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