Neoechinorhynchus (Neoechinorhynchus) villoldoi Vizcaíno, 1992

Actinopterygii

Corydoras paleatus (Jenyns) ( Siluriformes, Callichthyidae) (type host). SI: intestine. SD: adult. L: Buenos Aires Province: Villoldo Stream (35º15’S, 57º14’W). R: Vizcaíno (1992), Lunaschi et al. (2012). C: syntypes (MLP-He 1537, 1539, 1541–1544, 1547–1550).

Austrolebias bellottii (Steindachner) ( Cyprinodontiformes, Rivulidae). SI: intestine. SD: adult. L: Buenos Aires Province: Magdalena (35°04.865’S, 57°31.627’W), Punta Indio (35°18.932’S, 057°13.176’W). R: Montes et al. (2017). C: vouchers (MLP-He 7150).