Endemic species of Argentina. It inhabits the provinces of Córdoba, San Luis, and Santa Fe. Its populations are composed only of parthenogenetic females, as far as is known. It has a similar appearance to Teius oculatus, a species from which it differs by having between 16 and 22 dark spots above the clear dorsolateral line (counting from the tympanum to the beginning of the tail). In T. oculatus, there are 10 to 15 spots above the clear dorsolateral line.

Identification Key for Teius:

1a) Above the clear dorsolateral longitudinal band, there is a series or row of irregular dark spots, often anastomosed, which generally cannot be counted with certainty. Adult males with a bright blue belly: Teius teyou.
1b) Above the clear dorsolateral longitudinal band, there are individually recognizable dark spots, generally rectangular, square, or triangular in shape, which can be relatively easily counted: 2)
2a) 10 to 15 dark spots above the clear dorsolateral line, counting from the region above the tympanum to the base of the tail: Teius oculatus (both males and females can be observed).
2b) 16 to 22 dark spots above the clear dorsolateral line, counting from the supratympanic region to the base of the tail: Teius suquiensis (only parthenogenetic females).

Compiler of this description: Carlos Grassini