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Description of Prionchulus jonkershoekensis n. sp. (Nematoda: Mononchida), a new predatory species from South Africa

Candice Jansen van Rensburg
Candice Jansen van Rensburg
, 
Hendrika Fourie
Hendrika Fourie
, 
Samad Ashrafi
Samad Ashrafi
 oraz 
Milad Rashidifard
Milad Rashidifard
   | 01 sty 2021
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Data publikacji: 01 sty 2021
Zakres stron: 1 - 10
DOI: https://doi.org/10.21307/jofnem-2021-039
Słowa kluczowe
© 2021 Authors, published by Sciendo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1:

Line drawings of Prionchulus jonkershoekensis n. sp. female. (A) Head region in lateral view; (B) Entire body; (C) Neck region; (D) Pharyngo-intestinal junction (cardia); (E) Anterior genital branch with egg; (F) Posterior genital branch; (G) Rectal region and tail. (Scale bars: A, D = 20 µm; B, C = 100 µm; E, G = 50 µm; F = 10 µm).
Line drawings of Prionchulus jonkershoekensis n. sp. female. (A) Head region in lateral view; (B) Entire body; (C) Neck region; (D) Pharyngo-intestinal junction (cardia); (E) Anterior genital branch with egg; (F) Posterior genital branch; (G) Rectal region and tail. (Scale bars: A, D = 20 µm; B, C = 100 µm; E, G = 50 µm; F = 10 µm).

Figure 2:

Light micrographs of Prionchulus jonkershoekensis n. sp. female. (A-B) Anterior region in lateral median view; (C) Neck region; (D) Entire body; (E) Pharyno-intestinal junction; (F) Laterial lip region showing amphidial fovea and cuticle striations; (G-H) Vagina; (I) Caudal region.
Light micrographs of Prionchulus jonkershoekensis n. sp. female. (A-B) Anterior region in lateral median view; (C) Neck region; (D) Entire body; (E) Pharyno-intestinal junction; (F) Laterial lip region showing amphidial fovea and cuticle striations; (G-H) Vagina; (I) Caudal region.

Figure 3:

Scanning electron micrographs of Prionchulus jonkershoekensis n. sp. female. (A) Lip region (Frontal view); (B) Lateral view showing labial and cephalic papillae and amphidial fovea; (C) Tail; (D) Vulva (ventral view). (L.p- Labial papillae, C.p- Cephalic papillae, Am- Amphidial fovea).
Scanning electron micrographs of Prionchulus jonkershoekensis n. sp. female. (A) Lip region (Frontal view); (B) Lateral view showing labial and cephalic papillae and amphidial fovea; (C) Tail; (D) Vulva (ventral view). (L.p- Labial papillae, C.p- Cephalic papillae, Am- Amphidial fovea).

Figure 4:

A 50% majority rule Bayesian phylogenetic tree of Mononchidae, including Prionchulus jonkershoekensis n. sp. from South Africa, based on the partial 18 S rDNA sequences under the GTR + G model. The sequence of the new species is in boldface font.
A 50% majority rule Bayesian phylogenetic tree of Mononchidae, including Prionchulus jonkershoekensis n. sp. from South Africa, based on the partial 18 S rDNA sequences under the GTR + G model. The sequence of the new species is in boldface font.

Figure 5:

A 50% majority rule Bayesian phylogenetic tree of Mononchidae, including Prionchulus jonkershoekensis n. sp. from South Africa, based on the partial 28 S rDNA sequences under the GTR + G model. The sequence of the new species is in boldface font.
A 50% majority rule Bayesian phylogenetic tree of Mononchidae, including Prionchulus jonkershoekensis n. sp. from South Africa, based on the partial 28 S rDNA sequences under the GTR + G model. The sequence of the new species is in boldface font.

Morphometric data of Prionchulus jonkershoekensis n. sp.

Female
Characters Holotype Paratypes
n – 24
L 1.84 1.97 ± 0.1 (1.78–2.14)
a 23 26.9 ± 1.8 (23.0–29.7)
b 3.1 3.3 ± 0.2 (3.0–3.5)
c 11.6 13.0 ± 0.7 (11.6–14.3)
c’ 3.3 3.2 ± 0.2 (2.9–3.5)
V 67 63.3 ± 2.6 (58.6–67.4)
Lip region height 9 9.8 ± 1.3 (8.0–12.0)
Lip region width 37 37.0 ± 2.4 (32.0–40.0)
Amphid from anterior end 14.4 14.6 ± 1.7 (11.2–18.0)
Buccal cavity length 42 41.6 ± 1.4 (38.0–44.0)
Buccal cavity width 26 27.2 ± 1.9 (24.0–31.2)
Position of tooth apex (%) 29 28.5 ± 2.4 (25.0–33.0)
Nerve ring to anterior end 195 184 ± 5.0 (175–195)
Secretory-excretory pore to anterior end 220 206 ± 14.0 (185–220)*
Neck length 600 597 ± 10.9 (580–610)
Cardia length 11.2 12.3 ± 1.3 (10.0–15.0)
Cardia width 36 35.0 ± 2.6 (30.0–40.0)
Cuticle – lip region 2.0 1.8 ± 0.3 (0.8–2.4)
Cuticle – at vulva 2.4 2.8 ± 0.9 (2.0–4.0)
Cuticle – at tail 4 3.0 ± 1.0 (2.0–4.0)
Lateral chord width 22 25 ± 2.4 (20.0–28.0)
Body diameter – neck base 67 67.2 ± 2.7 (64.0–75.0)
Body diameter – at midbody 80 73.5 ± 4.3 (66.0–82.0)
Body diameter – at anus 48 46.6 ± 2.4 (44.0–52.0)
Vagina length 26 31.2 ± 2.9 (26.0–35.0)
Rectum length 36 40.1 ± 3.1 (36.0–48.0)
Tail length 158 152 ± 4.7 (144–158)
Hyaline length 6 6.8 ± 1.7 (4.0–8.0)
Egg length 95 84.0 ± 7.5 (76.0–95.0)**
Egg width 60 45.0 ± 9.0 (37.0–60.0)**
eISSN:
2640-396X
Język:
Angielski
Częstotliwość wydawania:
Volume Open
Dziedziny czasopisma:
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