Parapharyngodon sanjuanensis (Nematoda: Pharyngodonidae) parasitando a Phymaturus cf. palluma en la provincia de San Juan, Argentina

CASTILLO, GABRIEL NATALIO; JUAN CARLOS ACOSTA

Neotropical Helmintology

Asociación Peruana de Helmintología e Invertebrados Afines (APHIA)

Año: 2022 vol. 16 p. 141 - 146

1995-1043

Within the oxiuros, the genus Parapharyngodon is characterized by parasitizing mainly reptiles. In Argentina, up to now four species of Parapharyngodon spp. have been mentioned; Parapharyngodon sanjuanensis Ramallo, Bursey, Castillo & Acosta, 2016, Parapharyngodon riojensis Ramallo, Bursey & Goldberg, 2002, Parapharyngodon bainae Pereira, Sousa & Lima, 2011 and Parapharyngodon sceleratus Freitas, 1957. We mention the first record of the nematode P. sanjuanensis in the lizard Phymaturus cf. Palluma Molina, 1782 in the locality of Laguna Blanca, San Juan province, Argentina. Two male specimens of P. cf. palluma were analyzed. 65 nematodes P. sanjuanensis (2 males and 63 females) were recorded, with mean intensity of 32.5 and prevalence of 100%. Morphometric data for males and females are provided. The genus Phymaturus are the reptiles with the highest parasitic intensities of reptiles in Argentina. This is probably associated with its herbivorous diet and limited range of action. We mention a new parasite-host interaction, expanding the geographic distribution of the parasite.