Matuxia tymbyra is a species of land planarian belonging to the subfamily Geoplaninae.

Matuxia tymbyra has an elongated body with parallel margins, observed to reach about 88 mm in length.

The ventral side is light grey with a dark anterior tip.

[2] The specific epithet of tymbyra is derived from the Tupi language, meaning "buried"; this is in reference to how the type specimens of M. tymbyra were found buried in soil.

[2] Matuxia tymbyra is found within the state of Rio Grande do Sul, Brazil with type specimens being known from the São Francisco de Paula National Forest within the municipality of the same name.