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Description of Deladenus uljinensis n. sp., and additional DNA barcode data for Deladenus posteroporus (Nematoda: Neotylenchidae) from Korea

Abraham Okki Mwamula

Abraham Okki Mwamula

Research Institute of Invertebrate Vectors, Kyungpook National UniversitySangju, Republic of Korea
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Mwamula, Abraham Okki
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Chang-hwan Bae

Chang-hwan Bae

Biodiversity Research Department, Species Diversity Research Division, National Institute of Biological ResourcesIncheon, Republic of Korea
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Bae, Chang-hwan
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Yi Seul Kim

Yi Seul Kim

Research Institute of Invertebrate Vectors, Kyungpook National UniversitySangju, Republic of Korea
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Kim, Yi Seul
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Dong Woon Lee

Dong Woon Lee

  • Research Institute of Invertebrate Vectors, Kyungpook National UniversitySangju, Republic of Korea
  • Department of Entomology, Kyungpook National UniversitySangju, Republic of Korea
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Lee, Dong Woon
  
29 mar 2025
Description of Deladenus uljinensis n. sp., and additional DNA barcode data for Deladenus posteroporus (Nematoda: Neotylenchidae) from Korea's Cover Image
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Kategoria artykułu: Research Paper
Data publikacji: 29 mar 2025
Otrzymano: 17 sty 2025
DOI: https://doi.org/10.2478/jofnem-2025-0013
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© 2025 Abraham Okki Mwamula et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Line drawings of Deladenus uljinensis n. sp. (A–I): A: Female whole body; B: Male whole body; C: Female reproductive system; D: Female anterior region; E: Male anterior region; F, G: Female tail region; H: Lateral field; I: Male tail region.
Line drawings of Deladenus uljinensis n. sp. (A–I): A: Female whole body; B: Male whole body; C: Female reproductive system; D: Female anterior region; E: Male anterior region; F, G: Female tail region; H: Lateral field; I: Male tail region.

Figure 2:

Photomicrographs of Deladenus uljinensis n. sp. (A–K). A, B: Female reproductive system; C: Female anterior region; D: Female pharyngeal and glandular region; E: Male anterior region; F: Excretory pore / hemizonid position; G–I: Variation in female tail region; J: Lateral field; K: Male tail region. The arrow labeled n indicates the position of glandular nucleus. All other arrows indicate the collective position of both the excretory pore and the hemizonid (Scale bars: A = 50 μm; B, C, D, E, G, H, I and K = 20 μm; F and J = 10 μm).
Photomicrographs of Deladenus uljinensis n. sp. (A–K). A, B: Female reproductive system; C: Female anterior region; D: Female pharyngeal and glandular region; E: Male anterior region; F: Excretory pore / hemizonid position; G–I: Variation in female tail region; J: Lateral field; K: Male tail region. The arrow labeled n indicates the position of glandular nucleus. All other arrows indicate the collective position of both the excretory pore and the hemizonid (Scale bars: A = 50 μm; B, C, D, E, G, H, I and K = 20 μm; F and J = 10 μm).

Figure 3:

Photomicrographs of Deladenus posteroporus (A–J). A: Female anterior region; B: Male anterior region; C: Female pharyngeal and glandular region; D: Excretory pore / hemizonid position; E–G: Variation in female tail region; H: Lateral field; I: Male tail region; J: Vulval region with spermatheca. The two arrows labeled h and e indicate the position of hemizonid and excretory pore, respectively (Scale bars: A–I = 20 μm; J = 10 μm).
Photomicrographs of Deladenus posteroporus (A–J). A: Female anterior region; B: Male anterior region; C: Female pharyngeal and glandular region; D: Excretory pore / hemizonid position; E–G: Variation in female tail region; H: Lateral field; I: Male tail region; J: Vulval region with spermatheca. The two arrows labeled h and e indicate the position of hemizonid and excretory pore, respectively (Scale bars: A–I = 20 μm; J = 10 μm).

Figure 4:

Bayesian tree inferred under the GTR + I + G model from 18S-rRNA gene sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Acrobeloides varius and Cephalobus cubaensis.
Bayesian tree inferred under the GTR + I + G model from 18S-rRNA gene sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Acrobeloides varius and Cephalobus cubaensis.

Figure 5:

Bayesian tree inferred under the GTR + I + G model from LSU D2–D3 partial sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Oscheius myriophilus and Poikilolaimus oxycercus.
Bayesian tree inferred under the GTR + I + G model from LSU D2–D3 partial sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Oscheius myriophilus and Poikilolaimus oxycercus.

Figure 6:

Bayesian tree inferred under the GTR + I + G model from COI gene sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Ektaphelenchus joyceae and Devibursaphelenchus eproctatus.
Bayesian tree inferred under the GTR + I + G model from COI gene sequences of Deladenus spp. and other related species from various genera. Posterior probability values exceeding 50% are given on appropriate clades. The studied population is indicated in bold text. Outgroup taxa: Ektaphelenchus joyceae and Devibursaphelenchus eproctatus.

Morphometrics of mycetophagous population of Deladenus uljinensis n_ sp_ and Deladenus posteroporus from Korea_

Character Deladenus uljinensis n. sp. Deladenus posteroporus
Holotype ♀ ♀♀ ♂♂ ♀♀ ♂♂
n – 30 15 18 10
L 681.0 641.6±53.1 (504.0–736.0) 524.2±24.9 (482.0–561.0) 1007.7±156.3 (819.0–1199.0) 1039.8±62.3 (943.0–1150.0)
a 26.2 24.1±1.9 (21.1–28.3) 24.9±2.4 (21.3–29.3) 45.4±4.9 (36.2–52.6) 48.8±3.0 (42.3–51.7)
b 10.1 9.3±0.7 (7.7–11.0) 8.0±0.9 (6.7–9.3) 11.2±1.4 (9.4–13.7) 11.1±0.7 (10.1–11.9)
b′ 4.7 4.5±0.4 (3.7–5.2) 3.9±0.4 (3.5–4.6) 5.4±0.4 (4.6–6.0) 5.6±0.3 (5.0–6.0)
c 21.0 20.8±1.7 (17.5–24.3) 17.8±1.6 (14.8–19.9) 36.2±6.5 (30.0–49.1) 25.5±1.5 (23.4–27.2)
c′ 1.9 2.0±0.2 (1.7–2.4) 2.3±0.3 (2.0–3.2) 2.2±0.3 (1.7–2.8) 2.9±0.3 (2.6–3.4)
V 89.9 90.4±0.7 (88.6–91.7) – 93.0±1.2 (90.9–94.3) –
G1/T 67.0 60.6±5.5 (52.6–71.5) 58.4±3.3 (53.0–66.4) 60.1±8.2 (51.3–74.3) 55.0±5.1 (44.8–58.6)
Lip diam. 6.0 6.6±0.5 (5.0–7.0) 5.6±0.3 (5.0–6.5) 6.3±0.5 (5.0–7.0) 6.0±0.3 (5.5–6.5)
Stylet length 8.5 8.8±0.3 (8.0–9.5) 8.5±0.3 (8.0–9.0) 9.6±0.4 (8.5–10.0) 9.6±0.3 (9.0–10.0)
Anterior to nerve ring 60.0 62.3±4.8 (55.0–72.0) 58.5±5.8 (50.0–70.5) 79.2±8.4 (66.5–99.0) 82.5±6.5 (71.0–90.0)
Oesophageal-intestinal junction 67.0 69.2±5.3 (60.5–80.5) 65.9±6.4 (56.0–78.0) 89.7±7.9 (77.5–109.5) 93.7±8.1 (82.0–105.5)
Anterior to Hemizonid 100.5 99.0±5.5 (90.0–109.5) 89.0±3.9 (82.5–95.5) 110.5±7.9 (97.0–127.5) 111.0±6.0 (99.5–118.5)
Anterior to excretory pore 102.0 102.0±5.5 (91.0–111.0) 91.3±4.2 (83.0–98.0) 111.6±8.2 (98.0–132.0) 112.5±6.9 (102.0–126.0)
Glandular overlap 76.0 72.4±7.0 (57.0–84.0) 69.2±8.4 (52.0–82.5) 97.5±20.9 (70.0–122.0) 91.8±14.0 (80.0–109.5)
Maximum body diam. 26.0 26.7±2.8 (21.5–33.0) 21.2±1.4 (18.5–23.0) 22.4±3.7 (16.5–30.0) 21.4±1.8 (18.5–25.0)
Vulval body diam. 24.5 22.3±2.2 (16.0–26.5) – 19.5±4.4 (13.0–26.0) –
Vulva to anus distance (VA) 33.5 29.4±3.4 (21.5–37.0) – 39.9±4.1 (34.0–49.0) –
Anal / cloacal body diam. 17.0 15.6±1.4 (12.5–18.5) 12.8±0.8 (11.0–14.0) 12.6±1.3 (10.5–15.0) 14.0±0.4 (13.5–15.0)
Tail length 32.5 30.9±2.2 (26.0–36.0) 29.7±3.1 (24.5–35.0) 28.2±4.1 (22.5–35.0) 40.9±3.6 (36.5–46.5)
Ratio of VA to tail length 1.0 1.0±0.1 (0.7–1.2) – 1.5±0.3 (1.0–2.0) –
Spicules – – 19.4±1.0 (18.5–21.5) – 21.9±1.1 (20.0–23.0)
Gubernaculum – – 5.6±0.4 (5.0–6.0) – 6.1±0.7 (5.0–7.0)
Język:
Angielski
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Nauki biologiczne, Nauki biologiczne, inne
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