Metazoan endoparasites of Erythrolamprus poecilogyrus caesius (Cope, 1862) (Serpentes: Dipsadidae) in South American Chaco: Structural attributes at di!erent organization levels. - CARABALLO, JUAN; ARZAMENDIA, VANESA; GUERRERO, RICARDO; GONZÁLEZ, CYNTHYA (Acta Herpetologica, 2025)