Genus: Atolchelys ROMANO, GALLO, RAMOS, & ANTONIOLI, 2014
Etymology: Atol, from the former name of the type locality (Atol quarry), and Greek, chelys, "tortoise-shell lyre"; generally used to designate 'turtle'.

Species: lepida ROMANO, GALLO, RAMOS, & ANTONIOLI, 2014
Etymology: Latin, lepida (fem); "pleasant, charming, witty."

Holotype: UERJ.MC 2

Locality: CIMPOR quarry (formerly 'Atol quarry), 6.7 km NWN of the city of Sao Miguel dos Campos, 09°45'38"S, 36°09'22"W, Alagoas State, Northeastern Brazil.

Horizon: Morro do Chaves Formation.

Biostratigraphy:

Age: Upper Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.

Material: Skull, mandible, a pair of ceratohyals, plastron and some elements of the carapce and the appendicular skeleton.