[3] However, more recent research suggests that populations east of the Isthmus of Tehuantepec represent a distinct but yet undescribed species.

The head has broad labial flanges, giving it a spoon-like shape, as attested in its specific (from Latin spatulus, "spoon") and vernacular names.

The venter is white apart from grayish brown flecks in the voval sac of breedings males.

T. s. reticulatus has pale yellowish tan or olive-green coloration with dark brown or black reticulations and spots.

Breeding takes place in the temporary streams and ponds formed by rainfall and is therefore constrained to the rainy season.