Gusana is a genus of land planarians found in Chile.

Gusana was defined as land planarians with a broad, leaf-like body that tapers very abruptly anteriorly, giving it a triangular anterior end.

The cutaneous musculature, both ventrally and dorsally, is partially sunk into the mesenchyma.

The sensory border forms a thick edge around the ventral margin of the anterior end and the sensory pits are internally branched, differently from what occurs in most Neotropical land planarians.

The copulatory apparatus has a small intra-antral penis papilla and the female canal enters the genital antrum ventrally.