Girardia festai
Morphology:
High triangular head with pointed auricles.
Size:
Living specimens up to 20 mm long. Preserved specimens up to 15 mm long and 2.5 mm wide.
Distribution:
South America.
Habitat:
Streams, lakes, and natural springs. G. festai inhabits altitudes from almost sea level (Hyman 1959) to 4800 m (Du Bois-Reymond Marcus 1953).