Genus: Dasosaurus MAYER, JUNIOR, KERBER, NAVARRO, BANDEIRA, CISNEROS, SOUSA, PEREIRA, MEDEIROS, LINDOSO, NETO, GHILARDI, AUERLIANO, GODOY, FERREIRA & LANGE,R 2026
Etymology: Greek, dasos, "forest/copse," and Greek, sauros, "lisard/saurian." In reference to thelocation of hte digging site within 'Brazil's Legal Amazonia', a socio-geographical division of the country that includes most of the Amazon rainfroest (Nogueira, et al. 2028), as well as to a possible origin of the name of the state wtere the site is locacated, i.e. Maranhao, which may derive from the Portugues word 'emaranhado' (= tangleed), in reference to the thich vegetation of the area.

Species: tocantinensis MAYER, JUNIOR, KERBER, NAVARRO, BANDEIRA, CISNEROS, SOUSA, PEREIRA, MEDEIROS, LINDOSO, NETO, GHILARDI, AUERLIANO, GODOY, FERREIRA & LANGE,R 2026
Etymology: In reference to Tocantins, a major South American river, which also gives its name to the administrative region of the Maranhao state, where the new fossils were collected, near the eastern banks of the said river.

Holotype: CPHNAM VT 1600

Locality: Davinopolis-MA, near Imperatriz-MA, 5°33'25"S, 47°25'52"W, Maranhao State, Brazil.

Horizon: Lower part of the Itapecuru Formation.

Biostratigraphy:

Age: Late Aptian Stage, early middle Gallic Supepoch, Early Late Early Cretaceous Epoch, Late Early Cretaceous.

Material:

Breakdonw as follows;

CPHNAM VT 1600/1-2: 2 anterior caudal centra.

CPHNAM VT 1600/3-4: 2 middle caudal vertebrae.

CPHNAM VT 1600/5: Posterior caudal centrum.

CPHNAM VT 1600/6-9: 4 partial anterior caudal arches.

CPHNAM VT 1600/10: 4 isoalted anterior caudal prezygapophyses.

CPHNAM VT 1600/11-12: 2 isoalted anterior caudal neural spines.

CPHNAM VT 1600/13: 4 cheveron fragments.

CPHNAM VT 1600/14: Left radius.

CPHNAM VT 1600/15: Left ulna.

CPHNAM VT 1600/16: Partial right manus, including a proximal half of a metacarpal II.

CPHNAM VT 1600/17: Partial metacarpal III.

CPHNAM VT 1600/18: Distal half of metacarpal IV.

CPHNAM VT 1600/19: Distal half of left pubis.

CPHNAM VT 1600/20: Left ischium.

CPHNAM VT 1600/21: Right femur.

CPHNAM VT 1600/22: Proximal end of left tibia.

CPHNAM VT 1600/23: Proximal end of a left fibula.

CPHNAM VT 1600/24: Distal half of right fibula.

CPHNAM VT 1600/25: Partial left pes, including a complete metatarsal II.

CPHNAM VT 1600/26: Distal half of metatarsal III.

CPHNAM VT 1600/27: Non ungual pedal phalanges I.1.

CPHNAM VT 1600/28: Non ungual pedal phalanges II.1.

CPHNAM VT 1600/29:Non ungual pedal phalanges II.2.

CPHNAM VT 1600/30: Non ungual pedal phalanges III.1.

CPHNAM VT 1600/31-33: Ungual phalanges I-III.

CPHNAM VT 1600/34: Several trunk rib fragments.

CPHNAM VT 1600/35: Indeterminate fragments.