The dorsum has a light straw-yellow background color that is covered by very fine dark-brown to black spots.

The anterior end has an orange tinge that gradually fades posteriorly into the straw-yellow color of the dorsum.

[1] When crawling, S. irritata usually maintains the anterior end raised with the sides slightly curved downwards, giving it a U shaped in cross-section.

In order to move forward, it usually stretches the anterior end, touches the substrate and contract the posterior region.

[1] The only known place of occurrence of S. irritata is the São Francisco de Paula National Forest in southern Brazil.