It can easily be distinguished from other members of its genus by its distinctive ventral colouration which consists of large, red to yellow spots on a dark-coloured background.

[2] L. pustulatus is endemic to Brazil where it is found in the Cerrado, a tropical savannah area, in the states of Goiás, Mato Grosso, Tocantins, Ceará and Maranhão.

It is usually found in the vicinity of water bodies, and is an adaptable species, able to tolerate disturbed areas including gardens and urban locations.

On several occasions, a female was observed to "gather" tadpoles around her and move the group to a new location; the adult seems to have been providing some level of parental care.

[3] L. pustulatus is a common species; it has a wide range and large total population which is believed to be stable, and no particular threats have been identified.