New Records of Helminth Parasites in Amphibians from the South American Chaco

M. A.  González; M. A.   Villegas Ojeda; J. N. Caraballo; L. G.  Ailán Choke; M. I.  Hamann; M. I.  Duré; V. I.  Gómez; C. E.  González

doi:10.15407/zoo2025.01.069

M. A. González 1Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0009-0008-9497-6915
M. A. Villegas Ojeda Área de Biología, Departamento de Biología, Argentina https://orcid.org/0009-0007-8277-2432
J. N. Caraballo Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0002-5010-1948
L. G. Ailán Choke Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0003-1277-3476
M. I. Hamann Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0001-6999-7417
M. I. Duré Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0002-7037-162X
V. I. Gómez Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0002-8875-7010
C. E. González Centro de Ecología Aplicada del Litoral (CECOAL), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina. https://orcid.org/0000-0002-3512-9643

DOI: https://doi.org/10.15407/zoo2025.01.069

Keywords: Acanthocephala, Nematoda, Anura, Argentina

Abstract

This study aims to identify the helminth fauna of twelve anurans species from Argentina's Dry and Humid Chaco ecoregions. We collected one hundred and fifty-two specimens belonging to the species Dendropsophus nanus (n = 17), Scinax nasicus (n = 15), Pithecopus azureus (n = 7), Pseudis platensis (n = 10), Trachycephalus typhonius (n = 7) (Hylidae), Leptodactylus bufonius (n = 3), L. latinasus (n = 16), L. luctator (n = 14), L. macrosternum (n = 12), Physalaemus santafecinus (n = 14), P. albonotatus (n = 11) (Leptodactylidae), and Elachistocleis haroi (n = 26) (Microhylidae) from 3 areas located in the provinces of Chaco and Formosa (Dry Chaco) and in Corrientes province (Humid Chaco). A total of 17 helminth taxa were found; acanthocephalans in the larval stage (Centrorhynchidae: Centrorhynchus sp.) and nematodes in the larval stage (Anisakidae: Contracaecum; Ascarididae: Porrocaecum; Physalopteridae: Physaloptera; aff. Cystidicolidae) and adult stage (Rhabdiasidae: Rhabdias sp., R. elegans; Strongyloididae: Strongyloides pereirai; Molineidae: Oswaldocruzia proencai, O. subauricularis; Pharyngodonidae: Parapharyngodon senisfaciecaudus cubensis; Cosmocercidae: Aplectana hylambatis, Cosmocerca parva, C. podicipinus, Cosmocercella phyllomedusae, Schrankiana formosula; Kathlaniidae: Falcaustra mascula). This study presents new host and geographic records and expands knowledge of helminth diversity in a critically threatened group of vertebrates.

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