Evidence from integrative taxonomy reveals non-monophyly in Pseudocharopinus (Copepoda: Lernaeopodidae), with description of a new species from the Southwestern Atlantic

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dc.contributor.authorMontes, Martin Miguel
dc.contributor.authorCastro-Romero, Raul
dc.contributor.authorBovcon, Nelson
dc.contributor.authorOstoich, Nicolas
dc.contributor.authorValerga, Emilia
dc.contributor.authorTheiller, Mariela
dc.contributor.authorBalcazar, Dario
dc.date.accessioned2026-08-28T02:20:20Z
dc.date.available2026-08-28T02:20:20Z
dc.date.issued2025
dc.description.abstractA new species, Pseudocharopinus tenshken n. sp., is described and illustrated as a parasite of juvenile Squalus acanthias from Argentine waters in the South Atlantic. Although morphologically similar to Pseudocharopinus bicaudatus, a species widely distributed on the same host, distinct morphological differences are evident. The new species differs from P. bicaudatus in its dorsal shield, which is more elongated and has more developed sclerites. Additionally, the cephalothorax of the new species reaches 82% of the trunk length, whereas it is shorter in P. bicaudatus. In contrast, the maxilla in P. bicaudatus extends up to 65% of the trunk length, while in P. tenshken n. sp., it reaches 76% of the trunk length. These morphological distinctions are supported by a genetic divergence of 17% from P. bicaudatus. In the COI phylogenetic tree, a strongly supported clade is observed, consisting of (Pseudocharopinus malleus (P. bicaudatus + Lernaeopoda bivia)). Then, Salmincola spp. appears in a clade with low support, followed by Pseudocharopinus pillai. Later, another strongly supported clade includes (Pseudocharopinus tenshken n. sp. (Brianella corniger + Pseudocharopinus pteromylaei)). Based on our results, the genus Pseudocharopinus should be considered non-monophyletic. These findings suggest that at least two independent Lernaeopodid infection events occurred in chondrichthyans.
dc.description.sponsorshipUnidad de Equipamiento Cientifico- MAINI(R)-UCN; FONDEQUIP [EQM/220028]
dc.identifier.doi10.1007/s11230-025-10251-x
dc.identifier.issn0165-5752
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/741
dc.language.isoen
dc.publisherSpringer
dc.relation.urihttps://link.springer.com/article/10.1007/s11230-025-10251-x
dc.rights© The Author(s), under exclusive licence to Springer Nature B.V. 2025
dc.sourceSystematic Parasitology
dc.titleEvidence from integrative taxonomy reveals non-monophyly in Pseudocharopinus (Copepoda: Lernaeopodidae), with description of a new species from the Southwestern Atlantic
dc.typeArticle
oaire.citation.volume102
oaire.citationIssue6
organization.identifier.rorhttps://ror.org/04eyc6d95
organization.legalNameUniversidad de Antofagasta
uantof.identificator.departmentDepartamento de Ciencias Acuáticas y Ambientales
uantof.identificator.facultyFacultad de Ciencias del Mar y Recursos Biológicos
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