Family Leucochloridiidae Poche, 1907

Urotocus Looss, 1899

Urotocus fusiformis McIntosh, 1935

Host: Pteroptochos tarnii (King) .

Site of infection: rectum.

Localities: Gutiérrez and Mascardi Lakes, National Park of Nahuel Huapí, Río Negro Province. Material deposited: MACN; UNC, 161 (1–24). Reference: Flores et al. (2003).