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Delatylus andersoni n. gen., n. sp. (Nematoda: Neotylenchidae) Isolated from White Pine (Pinus monticola) Lumber from USA and Intercepted in Ningbo, China

Qing Yu

Qing Yu

Ottawa Research and Development Centre, Agriculture and Agri-Food CanadaOttawa, Canada
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Yu, Qing
, 
Maria Munawar

Maria Munawar

Institute of Biotechnology, College of Agriculture & Biotechnology, Zhejiang UniversityHangzhou, China
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Munawar, Maria
, 
Jianfeng Gu

Jianfeng Gu

Technical Center, Ningbo Entry-exit Inspection and Quarantine BureauNingbo, China
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Gu, Jianfeng
 y 
Weimin Ye

Weimin Ye

Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture & Consumer ServicesNorth Carolina, United States
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Ye, Weimin
  
31 may 2018
Delatylus andersoni n. gen., n. sp. (Nematoda: Neotylenchidae) Isolated from White Pine (Pinus monticola) Lumber from USA and Intercepted in Ningbo, China's Cover Image
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Categoría del artículo: research-article
Publicado en línea: 31 may 2018
Páginas: 69 - 76
Aceptado: 07 jul 2017
DOI: https://doi.org/10.21307/jofnem-2018-013
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© 2018 Qing Yu et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Line drawings of female Delatylus andersoni n. gen., n. sp: (A) head and pharynx, (B) lip region and stylet, (C) deirids, (D) vulva and the anus viewed ventrally, (E) vulva and the tail viewed laterally, (F) oviduct and quadricolumella, (G) oocytes.
Line drawings of female Delatylus andersoni n. gen., n. sp: (A) head and pharynx, (B) lip region and stylet, (C) deirids, (D) vulva and the anus viewed ventrally, (E) vulva and the tail viewed laterally, (F) oviduct and quadricolumella, (G) oocytes.

Figure 2

Micrographs of females of Delatylus andersoni n. gen., n. sp: (A) entire body; (B) head region, (C) pharynx (arrow showing the position of excretory pore and hemizonid), (D) pharynx with anterior part of the gonad, (E) posterior part of the female body, (F, G) female tail (arrow showing the position of vulva and anus), H: lateral lines. (scale bars = 10 μm).
Micrographs of females of Delatylus andersoni n. gen., n. sp: (A) entire body; (B) head region, (C) pharynx (arrow showing the position of excretory pore and hemizonid), (D) pharynx with anterior part of the gonad, (E) posterior part of the female body, (F, G) female tail (arrow showing the position of vulva and anus), H: lateral lines. (scale bars = 10 μm).

Figure 3

Micrographs of valve at the pharyngeal–intestinal junction of females of Delatylus andersoni n. gen., n. sp.
Micrographs of valve at the pharyngeal–intestinal junction of females of Delatylus andersoni n. gen., n. sp.

Figure 4

SEM of Delatylus andersoni n. gen., n. sp. (A, B) En face view of head and lip (aa arrows point to the amphid aperture; oa arrows point to the oral aperture; op arrows point to outer labial papillae; (C) vulva, anus, and tail; (D) lateral fields.
SEM of Delatylus andersoni n. gen., n. sp. (A, B) En face view of head and lip (aa arrows point to the amphid aperture; oa arrows point to the oral aperture; op arrows point to outer labial papillae; (C) vulva, anus, and tail; (D) lateral fields.

Figure 5

Phylogeny of Delatylus andersoni n. gen., n. sp. and closely related inferred from partial 18 S rRNA gene sequences by Bayesian analysis. Phylogeny was inferred under a GTR+I+G model (−lnL = 6333.834; AIC = 12687.668; freqA = 0.2384; freqC = 0.2036; freqG = 0.267; freqT = 0.2911; R(a) = 1.1233; R(b) = 3.698; R(c) = 2.4739; R(d) = 0.7402; R(e) = 5.1375; R(f) = 1; Pinva = 0.6096; Shape = 0.8015). Posterior probability values exceeding 50% are given on appropriate clades.
Phylogeny of Delatylus andersoni n. gen., n. sp. and closely related inferred from partial 18 S rRNA gene sequences by Bayesian analysis. Phylogeny was inferred under a GTR+I+G model (−lnL = 6333.834; AIC = 12687.668; freqA = 0.2384; freqC = 0.2036; freqG = 0.267; freqT = 0.2911; R(a) = 1.1233; R(b) = 3.698; R(c) = 2.4739; R(d) = 0.7402; R(e) = 5.1375; R(f) = 1; Pinva = 0.6096; Shape = 0.8015). Posterior probability values exceeding 50% are given on appropriate clades.

Figure 6

Phylogeny of Delatylus andersoni n. gen., n. sp. and closely related inferred from 28 S D2/D3 rRNA gene sequences by Bayesian analysis. Phylogeny was inferred under a TrN+G model (−lnL = 2644.97; AIC = 5301.9399; freqA = 0.2103; freqC = 0.1993; freqG = 0.3249; freqT = 0.2655; R(a) = 1; R(b) = 3.0953; R(c) = 1; R(d) = 1; R(e) = 7.2585; R(f) = 1; Pinva = 0; Shape = 0.3542). Posterior probability values exceeding 50% are given on appropriate clades.
Phylogeny of Delatylus andersoni n. gen., n. sp. and closely related inferred from 28 S D2/D3 rRNA gene sequences by Bayesian analysis. Phylogeny was inferred under a TrN+G model (−lnL = 2644.97; AIC = 5301.9399; freqA = 0.2103; freqC = 0.1993; freqG = 0.3249; freqT = 0.2655; R(a) = 1; R(b) = 3.0953; R(c) = 1; R(d) = 1; R(e) = 7.2585; R(f) = 1; Pinva = 0; Shape = 0.3542). Posterior probability values exceeding 50% are given on appropriate clades.

Morphometrics of Delatylus andersoni n_ gen_, n_ sp_ All measurements are in μm and in the form: mean ± s_d (range)_

Measurements
Holotype Populations
Characters 9095 (paratype) 480 484
n 1 19 20 20
L 760 756.1 ± 113.7 (526.8–943.9) 613.8 ± 96.3 (439.5–829.6) 760.0 ± 73.8 (636.6–907.2)
a 27.1 28.8 ± 2.4 (24.9–33.5) 23.7 ± 2.7 (18.3–27.9) 22.0 ± 2.7 (17.8–27.1)
b 10.8 11.1 ± 1.7 (7.5–13.7) 9.6 ± 1.6 (7.0–13.8) 11.6 ± 1.4 (9.3–13.8)
b' 5.6 5.9 ± 0.8 (4.1–7.1) 5.8 ± 0.9 (4.3–8.3) 6.6 ± 0.6 (5.4–7.4)
c 13.8 14.3 ± 2.1 (10.3–17.9) 13.7 ± 1.2 (11.3–15.5) 15.0 ± 1.7 (11.8–18.9)
c' 3.2 3.4 ± 0.2 (2.9–3.8) 3.2 ± 0.2 (2.8–3.8) 3.1 ± 0.4 (2.6–4.1)
V 89 89.9 ± 1.5 (85.6–91.8) 88.8 ± 0.8 (87.3–90.3) 89.5 ± 1.1 (87.3–91.8)
Stylet length 9.0 8.8 ± 0.3 (8.5–10.5) 8.8 ± 0.6 (7.8–9.7) 9.2 ± 0.7 (7.3–10.1)
Max. body diam. 28 26.4 ± 4.6 (18.4–33.9) 26.4 ± 6.2 (20.1–40.5) 35.1 ± 6.3 (23.5–49.8)
Gonad length 595 526.0 ± 10 (317.7–677.9) 461.1 ± 91.5 (261.6–685.5) 603.1 ± 74.7 (494.5–753.8)
Lip height 2 2.1 ± 0.2 (1.8–2.6) 2.2 ± 0.2 (1.9–2.8) 2.3 ± 0.3 (2.0–2.9)
Lip width 8 8.3 ± 0.5 (7.1–9.1) 7.4 ± 0.6 (6.6–8.7) 8.0 ± 0.7 (6.4–8.9)
Anterior end to nerve ring 65 61.1 ± 3.8 (55.1–70.8) 55.9 ± 3.2 (50.8–64.7) 58.6 ± 4.5 (50.2–66.2)
Anterior end to pharyngo-intestinal junction 70 68.3 ± 3.3 (62.5–75.1) 63.9 ± 3.8 (58.1–72.3) 65.7 ± 4.5 (55.8–73.0)
Anterior end to the hemizonid 110 104.0 ± 8.2 (91.3–122.5) 95.7 ± 13.1 (79.8–128.6) 107.0 ± 7.5 (90.7–119.9)
Distance from the nerve ring to the hemizonid 50 43.0 ± 6.4 (31.6–57.2) 36.8 ± 13.0 (23.4–69.0) 48.4 ± 9.2 (29.1–61.3)
Anterior end to the excretory pore 113 107.1 ± 7.6 (95.6–124.5) 92.6 ± 13.0 (76.7–125.4) 103.0 ± 7.4 (86.0–114.6)
Distance from the nerve ring to the excretory pore 51 46.0 ± 5.6 (37.8–59.2) 36.8 ± 13.0 (23.4–69.0) 44.4 ± 9.2 (24.4–58.1)
Anterior end to the end of pharyngeal glands 135 128.3 ± 7.7 (113.2–146.6) 106.4 ± 10.2 (90.5–127.4) 115.0 ± 5.3 (105.7–125.3)
Distance from vulva to anus 26 22.3 ± 3.3 (16.0–28.3) 23.3 ± 3.6 (18.8–31.3) 27.8 ± 3.0 (21.5–33.3)
Anal body width (ABW) 17 15.6 ± 2.0 (11.3–19.8) 14.1 ± 1.6 (11.9–16.9) 16.5 ± 2.0 (12.5–21.0)
Distance from vulva to tail terminus 81 75.3 ± 5.4 (60.0–83.9) 67.9 ± 7.2 (55.2–84.9) 78.8 ± 5.2 (72.8–89.3)
Tail length 55 53.1 ± 4.6 (39.3–58.9) 44.7 ± 4.8 (35.5–53.6) 51.0 ± 4.0 (45.8–59.6)
Ratio of vulva–anus/tail length 0.47 0.5 ± 0.1 (0.4–0.6) 0.5 ± 0.2 (0.4–0.7) 0.5 ± 0.1 (0.4–0.5)
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