Skrjabinodon castillensis (Nematode: Pharyngodonidae) parasitizing Liolaemus gracielae lizard (Squamata: Iguania: Liolaemidae) from Argentina


  • Gabriel N. Castillo Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina
  • Cynthia González-Rivas Centro de Rehabilitación de Fauna Silvestre, Educación Ambiental y Recreación Responsable, San Juan, Argentina
  • Juan C. Acosta Gabinete de Investigación DIBIOVA (Diversidad y Biología de Vertebrados del Árido), Universidad Nacional de San Juan, San Juan, Argentina


Oxyuroidea, reptile, Skrjabinodon castillensis, nematodes, Neotropical


Skrjabinodon castillensis is mentioned and illustrated here, based on specimens found in the large intestines of Liolaemus gracielae (Squamata: Liolaemidae) collected in San Juan province, Argentina. The species found is assigned to Skrjabinodon based lateral alae present in males. Lateral alae beginning midway between lips and nerve ring and ending just posterior to first pair of caudal papillae. In males, caudal alae absent, paired caudal papillae present. The species recorded in this study differs from all other species assigned to Skrjabinodon by morphology and number of tail filament spines. Skrjabinodon castillensis is the ninth species from the Neotropical realm and the only species of this genus known from Argentina.


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How to Cite

Castillo, G. N., González-Rivas, C., & Acosta, J. C. (2023). Skrjabinodon castillensis (Nematode: Pharyngodonidae) parasitizing Liolaemus gracielae lizard (Squamata: Iguania: Liolaemidae) from Argentina. Annals of Parasitology, 69(1), 37–41. Retrieved from



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