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A new entomopathogenic nematode species and its association with a facultative necromenic nematode Cover

A new entomopathogenic nematode species and its association with a facultative necromenic nematode

Helminthologia
Volume 61 (2024): Issue 4 (December 2024)
By: M. B. Ávila-López,  D. I. Hernandez-Mena,  J. E. Ibarra and  V. M. Vidal-Martínez  
Open Access
|Dec 2024

Figures & Tables

Fig. 1.

Heterorhabditis kankabi n. sp. SEM microphotographs. A, Head of an amfimictic female with six labial papillae and two amphids (magnification 5,000×); B, Posterior region of a hermaphrodite nematode showing anal area and tip of the tail (magnification 2,500×); C, Anterior region of the nematode where the excretory pore is observed in a hermaphroditic specimen (magnification 1,000×); D, infective juvenile with larval tooth and striated cuticle of the second instar (magnification 5,000×); E, Protruding vulvar region located in the middle part of the hermaphrodite specimen (magnification 5,000×); F, Anterior region of an ensheathed nematode showing the body with tessellate pattern (magnification 5,000×).
Heterorhabditis kankabi n. sp. SEM microphotographs. A, Head of an amfimictic female with six labial papillae and two amphids (magnification 5,000×); B, Posterior region of a hermaphrodite nematode showing anal area and tip of the tail (magnification 2,500×); C, Anterior region of the nematode where the excretory pore is observed in a hermaphroditic specimen (magnification 1,000×); D, infective juvenile with larval tooth and striated cuticle of the second instar (magnification 5,000×); E, Protruding vulvar region located in the middle part of the hermaphrodite specimen (magnification 5,000×); F, Anterior region of an ensheathed nematode showing the body with tessellate pattern (magnification 5,000×).

Fig. 2.

Schematic details of Heterorhabditis kankabi n. sp. A) anterior region of a hermaphrodite female; B) anterior region of an amphimictic female; C) apical view of a hermaphrodite female; D) tail of a hermaphrodite female; E) anterior region of an infective juvenile; F) tail of infective juvenile.
Schematic details of Heterorhabditis kankabi n. sp. A) anterior region of a hermaphrodite female; B) anterior region of an amphimictic female; C) apical view of a hermaphrodite female; D) tail of a hermaphrodite female; E) anterior region of an infective juvenile; F) tail of infective juvenile.

Fig. 3.

Phylogenetic relationships of species of the genus Heterorhabditis using the maximum likelihood method to generate the phylogenetic trees.The tree shows ITS on the right side and the 28S on the left side.
Phylogenetic relationships of species of the genus Heterorhabditis using the maximum likelihood method to generate the phylogenetic trees.The tree shows ITS on the right side and the 28S on the left side.

Fig. 4.

Clear field micrography of Metarhabditis rainai male ventral view showing eight bursal papillae.
Clear field micrography of Metarhabditis rainai male ventral view showing eight bursal papillae.

Fig. 5.

Metarhabditis rainai SEM microphotographs of male. A, posterior region lateral view bursal papillae with small adcloacal papillae, B, ventral view showing two pairs of small papillae on posterior edge of cloaca and spicules.
Metarhabditis rainai SEM microphotographs of male. A, posterior region lateral view bursal papillae with small adcloacal papillae, B, ventral view showing two pairs of small papillae on posterior edge of cloaca and spicules.

Fig. 6.

Phylogenetic relationships of species of the genus Metarhabditis using the maximum likelihood method to generate the phylogenetic trees.
Phylogenetic relationships of species of the genus Metarhabditis using the maximum likelihood method to generate the phylogenetic trees.

Genetic distances between Heterorhabditis kaankabi n_ sp_ and the Heterorhabditis species in the 28S and ITS ribosomal gene sequences_

SpeciesHeterorhabditis kankabi n. sp.
28SITS
pNpN
Heterorhabditis taysearaenana1.2211
Heterorhabditis mexicana0.6761.2211
Heterorhabditis floridensis0.6760.666
Heterorhabditis baujardi0.6761.3711
Heterorhabditis amazonensis0.7971.6615
Heterorhabditis noenieputensis2.92269.4383
Heterorhabditis indica2.92279.0179
Heterorhabditis zealandica5.775124.66215
Heterorhabditis megidis6.005322.45194
Heterorhabditis downesinana21.69187
Heterorhabditis safricana5.204622.03191
Heterorhabditis marelatus5.204621.91190
Heterorhabditis atacamensis4.884220.65179
Heterorhabditis bacteriophora4.684221.81193
Heterorhabditis georgiana5.104522.03195
Heterorhabditis beicherriana4.954322.03195
DOI: https://doi.org/10.2478/helm-2024-0038 | Journal eISSN: 1336-9083 | Journal ISSN: 0440-6605
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Language: English
Page range: 345 - 356
Submitted on: Sep 6, 2023
|
Accepted on: Oct 23, 2024
|
Published on: Dec 31, 2024
Published by: Slovak Academy of Sciences, Institute of Parasitology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Bacteriophage,
Entomopathogenic nematodes,
n. sp.
Related subjects:
Life sciences,
Zoology,
Ecology,
Life sciences, other,
Medicine,
Clinical medicine,
Microbiology, virology and infection epidemiology

© 2024 M. B. Ávila-López, D. I. Hernandez-Mena, J. E. Ibarra, V. M. Vidal-Martínez, published by Slovak Academy of Sciences, Institute of Parasitology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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