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Description of Deladenus gilanica n. sp. (Hexatylina: Neotylenchidae) isolated from wood of black pine in Northern Iran

Parisa Jalalinasab
Parisa Jalalinasab
, 
Mehrab Esmaeili
Mehrab Esmaeili
, 
Weimin Ye
Weimin Ye
 et 
Ramin Heydari
Ramin Heydari
   | 28 juil. 2020
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Publié en ligne: 28 juil. 2020
Pages: 1 - 10
Reçu: 12 janv. 2020
DOI: https://doi.org/10.21307/jofnem-2020-065
Mots clés
© 2020 Parisa Jalalinasab 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 Deladenus gilanica n. sp. (A-F) Mycophagous female − (A) entire body; (B) pharyngeal region; (C) vulva region; (D) anterior end; (E, F) posterior body (tail). (G and H) Infective female − (G) entire body; (H) anterior end (Scale bars: A, G = 20 µm, B-F, H = 10 µm).
Line drawings of Deladenus gilanica n. sp. (A-F) Mycophagous female − (A) entire body; (B) pharyngeal region; (C) vulva region; (D) anterior end; (E, F) posterior body (tail). (G and H) Infective female − (G) entire body; (H) anterior end (Scale bars: A, G = 20 µm, B-F, H = 10 µm).

Figure 2:

Photomicrographs of Deladenus gilanica n. sp. (A-D, F and G) Mycophagous female − (A) pharyngeal region; (B) anterior end; (C) vulva region; (D) pharyngeal region showing excretory pore and hemizonid; (F) end of female pharyngeal region; (G) female posterior body (tail). (E, H, and I) Infective female − (E) anterior end; (H) vulva region; (I) posterior body (tail) (All scale bars = 10 µm).
Photomicrographs of Deladenus gilanica n. sp. (A-D, F and G) Mycophagous female − (A) pharyngeal region; (B) anterior end; (C) vulva region; (D) pharyngeal region showing excretory pore and hemizonid; (F) end of female pharyngeal region; (G) female posterior body (tail). (E, H, and I) Infective female − (E) anterior end; (H) vulva region; (I) posterior body (tail) (All scale bars = 10 µm).

Figure 3:

The 10001st Bayesian tree inferred from 18S under GTR + I + G model (−lnL = 3768.1687; AIC = 7556.3374; freqA = 0.2621; freqC = 0.1952; freqG = 0.2673; freqT = 0.2755; R(a) = 1.4504; R(b) = 3.0092; R(c) = 1.5594; R(d) = 0.3743; R(e) = 7.8701; R(f) = 1; Pinva = 0.4966; Shape = 0.6306). Posterior probability values exceeding 50% are given on appropriate clades.
The 10001st Bayesian tree inferred from 18S under GTR + I + G model (−lnL = 3768.1687; AIC = 7556.3374; freqA = 0.2621; freqC = 0.1952; freqG = 0.2673; freqT = 0.2755; R(a) = 1.4504; R(b) = 3.0092; R(c) = 1.5594; R(d) = 0.3743; R(e) = 7.8701; R(f) = 1; Pinva = 0.4966; Shape = 0.6306). Posterior probability values exceeding 50% are given on appropriate clades.

Figure 4:

The 10001st Bayesian tree inferred from Revised 28S D2/D3 under TVM + I + G model (−lnL = 3258.8145; AIC = 6535.6289; freqA = 0.1843; freqC = 0.2082; freqG = 0.3284; freqT = 0.2791; R(a) = 1.3629; R(b) = 4.8955; R(c) = 2.5959; R(d) = 0.7212; R(e) = 4.8955; R(f) = 1; Pinva = 0.2327; Shape = 0.4722). Posterior probability values exceeding 50% are given on appropriate clades.
The 10001st Bayesian tree inferred from Revised 28S D2/D3 under TVM + I + G model (−lnL = 3258.8145; AIC = 6535.6289; freqA = 0.1843; freqC = 0.2082; freqG = 0.3284; freqT = 0.2791; R(a) = 1.3629; R(b) = 4.8955; R(c) = 2.5959; R(d) = 0.7212; R(e) = 4.8955; R(f) = 1; Pinva = 0.2327; Shape = 0.4722). Posterior probability values exceeding 50% are given on appropriate clades.

Morphometrics of female of Deladenus gilanica n. sp. from Iran.

Mycetophagous stage Infective stage
Characters Holotype female Paratype females Paratype females
n − 10 4
L 367 364.8 ± 33.7 (314-422) 330.3 ± 17.6 (310-341)
L' 361 335.4 ± 33.3 (285-393) 294.7 ± 15.3 (277-304)
a 18.6 21.1 ± 2.6 (18.1-26.5) 28.3 ± 0.1 (28.2-28.4)
b 8.5 7.1 ± 0.9 (5.9-8.5) 6.2 ± 1.8 (5.1-8.3)
b' 5.7 5.0 ± 0.9 (4.1-6.9) 3.7 ± 0.4 (3.4-4.1)
c 13.4 12.4 ± 1.1 (10.8-14.6) 9.3 ± 0.3 (9.0-9.4)
c' 2.4 3.3 ± 0.4 (2.4-3.8) 5.1 ± 0.4 (4.7-5.4)
V 87.4 86.6 ± 0.7 (85.4-87.4) 82.6 ± 0.6 (82.1-83.2)
Head height 1 1.4 ± 0.2 (1-1.5) 2.1 ± 0.3 (2-2.5)
Head width 6 6.5 ± 0.5 (6-7) 4.8 ± 0.3 (4.5-5)
Stylet 8 8.0 ± 0.2 (7.5-8.0) 13.9 ± 0.9 (13-15)
Excretory pore 71 68.4 ± 5.2 (61-76) 69 ± 6.5 (63-76)
Hemizonid 71 68.4 ± 5.2 (61-76) 68.5 ± 6.6 (63-76)
Pharynx 46 51.4 ± 4.9 (46-63) 54 ± 10.6 (41-64)
Overlapping 22 23.1 ± 7.5 (11-33) 32.3 ± 5.9 (29-41)
Body width 21 17.5 ± 2.8 (14-22) 11.8 ± 0.5 (11-12)
Head-vulva 341 316.0 ± 30.8 (268-367) 272.7 ± 12.7 (258-281)
Vulva-anus 20 19.4 ± 3.4 (15-26) 22 ± 3.0 (19-25)
Tail 29 29.4 ± 1.3 (27-32) 35.7 ± 2.5 (33-38)

Comparison of Deladenus gilanica n. sp. with eight similar species.

Species L a b c V Stylet Median corporeal chamber Excretory pore relative to hemizonida Tail Lib Male Infective stage
D. gilanica n. sp. 314-422 18.1-26.5 5.9-8.5 10.8-14.6 85.4-87.4 7.5-8 – SL 27-32 8 at level of vulva – +
D. durus 620-13,60 21-50 7.7-16 19.5-39.3 90-95 6-11 + P 21-43 6-7 + –
D. aridus 693 31.2 19.8 91.9 9.4 – P 5 – –
D. obesus 970-1,400 18-26 8-16.9 32-33.6 92-93 7.3-9 – P 30-47 8-10 – –
D. processus 760-990 34-49 13.3-17.7 19.6-22.8 92.2-93.5 6-7 – P 35-44 6 + –
D. oryzae 660-960 19-26 7.9 29 92-93.5 7-9 + A 29-34 Indistinct + +
D. wilsoni 1,490-2,700 34.6-62.6 15.5-26.5 46.6-66.9 94.6-96.2 10-11 – A or SL 7-9 at level of vulva + +
D. proximus 1,760-2,200 40-53.7 16.3-21.3 44-60 95.1-95.9 11-12 – A 31-47 7-8 at level of vulva + +
D. posteroporus 889-1,026 38-43 10.1-12.8 31.3-37.1 93.5-95.9 8-11 – A 27-29 11-12 at midbody + +
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