Genus: Epachthosaurus POWELL, 1990
Etymology: Greek, epachthos, "heavy" and Greek, sauros, "lizard."
= Epachtosaurus POWELL, 1986 vide MARTINEZ, GIMENEZ, RODRIGUEZ & BOCHATEY, 1986 (nomen nudum)

Species: sciuttoi POWELL, 1990
Etymology: In honor of Dr. J. C. Sciutto.
= Epachtosaurus sciuttoi POWELL, 1986 vide MARTINEZ, GLIMENEZ, RODRIGUEZ & BOCHAETY, 1986 (nomen nudum)
= Epachtosaurus siuttoi POWELL, MARTINEZ, GIMENEZ & RODGRIGUEZ, 1987 (nomen nudum)

Holotype: MACN-CH 1317

Locality: Chubut Province, Patagonia, Argentina.

Horizon: Bajo Barreal Formation.

Biostratigraphy:

Age: Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material: Fragmentary posterior dorsal vertebra.

Paratype: MACN-18689: 6 articulated posterior dorsal vertebrae, fragmentary sacrum, fragmentary pubis and ilium.

Referred material:

MARTINEZ, LAMANNA, SMITH & DODSON, 2000

Number: Not given: Fragmentary skull and cervical vertebrae.

 

RODRIGUEZ, MARTINEZ & LUNA, 1992, RODRIGUEZ, MARTINEZ, LUNA & LAMANNA, 2004

Locality: Estancia “Ocho Hermanos” Sierra de San Bernardo, west of Lago Musters, Chubut Province, Patagonia, Argentina.

Horizon: Inferior Member, Bajo Barrel Formation, Chubut Group.

Biostratigraphy:

Age: Upper Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch – Lower Turonian Stage, Uppermost Gallic Subepoch-Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

UNPSJB-PV 920: Fragmentary skeleton.