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Description of Pseudobenedeniella johnstoni sp. n. (Monogenea: Capsalidae) from the gills of Antarctic black rockcod, Notothenia coriiceps Richardson in coastal waters of West Antarctica Cover

Description of Pseudobenedeniella johnstoni sp. n. (Monogenea: Capsalidae) from the gills of Antarctic black rockcod, Notothenia coriiceps Richardson in coastal waters of West Antarctica

Open Access
|Dec 2024

Abstract

Morphological and metrical analyses of monogeneans from the gills of Antarctic rockcod Notothenia coriiceps revealed the presence of a new species, Pseudobenedeniella johnstoni sp. n. Fresh specimens of monogeneans collected from N. coriiceps from the vicinity of Galindez Island, Argentine Islands, West Antarctica were examined morphologically, by molecular analysis and Energy Dispersive X-ray analysis (EDXA). The new species differs from Pseudobenedeniella branchialis Timofeeva, Gaevskaya, Kovaljova, 1987 by the different shapes of anterior and posterior hamuli, the presence of a pronounced sickle-shaped blade of the anterior hamulus and its characteristic wide (wing-like) shaft, serrated on one side, smaller posterior hamulus with a distinct short and broad shaft that widens and is serrated distally, more extensive dimensions of the penis and its pear-like shape, smaller vagina diameter, ovoid egg shape with more pointed anterior pole and blunt posterior pole and long coiled filament as well as different type species of the host in a geographically distant type locality. Genetic data accompanied the description, and phylogenetic analyses inferred that the new species clustered with monogenean species positioned under the family Capsalidae. Molecular data were generated for the 18S and 28S genes of the ribosomal RNA of P. johnstoni sp. n. to provide the first molecular analysis for Pseudobenedeniella species. EDXA for a species of Pseudobenedeniella was offered for the first time.

DOI: https://doi.org/10.2478/helm-2024-0037 | Journal eISSN: 1336-9083 | Journal ISSN: 0440-6605
Language: English
Page range: 327 - 344
Submitted on: Oct 15, 2024
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Accepted on: Jan 15, 2025
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Published on: Dec 31, 2024
In partnership with: Paradigm Publishing Services
Publication frequency: Volume open

© 2024 N. Y. Rubtsova, A. Chaudhary, S. Glotov, T. A. Kuzmina, published by Slovak Academy of Sciences, Institute of Parasitology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.