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Issue: Vol. 5711 No. 3: 20 Oct. 2025
Type: Article
Published: 2025-10-20
DOI: 10.11646/zootaxa.5711.3.6
Page range: 411-423
Abstract views: 44
PDF downloaded: 1

Morphological and molecular characterization of Chauhanellus peruvianus sp. nov. (Dactylogyridea, Dactylogyridae) from Galeichthys peruvianus (Siluriformes, Ariidae) in the Southern Pacific Ocean

Facultad de Medicina Humana; Universidad Ricardo Palma; Lima 33; Ap 1801; Peru.
Laboratorio de Ecología y Evolución de Parásitos; Facultad de Ciencias del Mar y Recursos Biológicos; Universidad de Antofagasta; 601 Angamos; Antofagasta; Chile.
Laboratorio de Zoología de Invertebrados; Departamento Académico de Zoología; Facultad de Ciencias Biológicas; Universidad Nacional Mayor de San Marcos (UNMSM); Av. Universitaria cruce con Av. Venezuela cuadra 34; Lima; Peru.
Departamento de Parasitologia Animal; Universidade Federal Rural do Rio de Janeiro; Seropédica; RJ; Brazil.
Departamento de Parasitologia Animal; Universidade Federal Rural do Rio de Janeiro; Seropédica; RJ; Brazil.
Laboratorio de Zoología de Invertebrados; Departamento Académico de Zoología; Facultad de Ciencias Biológicas; Universidad Nacional Mayor de San Marcos (UNMSM); Av. Universitaria cruce con Av. Venezuela cuadra 34; Lima; Peru.
Platyhelminthes Chauhanellus peruvianus Galeichthys peruvianus Peru

Abstract

A new species of Chauhanellus Bychowsky & Nagibina, 1969 is described from the gills of the Peruvian sea catfish, Galeichthys peruvianus Lütken (Siluriformes, Ariidae), collected from the Southern Pacific Ocean off the coast of Peru. The description of the new species is based on an integrative taxonomic approach, incorporating morphological data, 28S rDNA sequencing, and phylogenetic analysis. Chauhanellus peruvianus sp. nov. can be distinguished from all its congeners by possessing a tubular MCO with proximal and distal curvatures and a spear-shaped distal extremity, as well as an elongated, grooved accessory piece that is proximally expanded and distally hook-shaped. Phylogenetic analyses based on 28S rDNA sequences recovered C. peruvianus sp. nov. in a clade with C. boegeri Domingues & Fehlauer, 2006 and an unidentified Chauhanellus species from Genidens genidens (Cuvier), forming a well-supported Neotropical lineage. However, the genus Chauhanellus was recovered as non-monophyletic, with a separate Indo-Malayan lineage comprising seven species. The description of C. peruvianus sp. nov. represents the first record of Chauhanellus in the Southeastern Pacific and raises the number of species reported from South America and globally to eight and 32, respectively.

 

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How to Cite

Cruces, C.L., Ñacari, L.A., Mondragón-Martínez, A., Simões, R., Luque, J.L. & Chero, J.D. (2025) Morphological and molecular characterization of Chauhanellus peruvianus sp. nov. (Dactylogyridea, Dactylogyridae) from Galeichthys peruvianus (Siluriformes, Ariidae) in the Southern Pacific Ocean. Zootaxa, 5711 (3), 411–423. https://doi.org/10.11646/zootaxa.5711.3.6