Dasosaurus tocantinensis was named by Mayer et al. (2026) [Dasosaurus tocantinensis can be differentiated from its sister taxon Ga. morellensis based on the following unique set of features: (1) dorsal-most of the three neural arch ridges of the middle-posterior caudal vertebrae placed at the level of the dorsal (rather than the ventral) margin of the prezygapophysis and dorsally bounding a shallower, ellipsoid costovertebral concavity; (2) anterior caudal neural spines expanded dorsolaterally (‘stake-like’ shaped), creating a quadrangular dorsal platform; (3) slenderer femur with a more medially curved shaft; (4) anterior surface of the femur lacking a linea intermuscularis cranialis; (5) less developed lateral bulge on the femur, about 40% of the transverse minimal width of the femoral shaft; (6) pedal ungual phalanges I–II with a dorsolateral extensor tubercle.]. Its type specimen is CPHNAM VT 1600, a set of postcrania (partial postcranial remains pertaining to a single individual (Fig. 3), numbered as follows (in parentheses): two anterior caudal centra (1600/1–2); two middle ), and it is a 3D body fossil. Its type locality is Dasosaurus-type locality, which is in an Aptian fluvial-lacustrine siltstone/sandstone in the Itapecuru Formation of Brazil. It is the type species of Dasosaurus.