Genus: Genyodectes WOODWARD, 1901
Etymology: Greek, genys, “jaw, chin”, and Greek, dektes, “bitter, Jaw-bitter.”
= Geniodectes BONAPARTE, NOVAS & CORIA, 1990 (sic)
= Genyodetes AMEGHINO, 1913 (sic)

Species: serus WOODWARD, 1901
Etymology: Latin, serus, "late."

Holotype: MLP 26-39

Locality: Canadon Grande, Paso de Indios Department, Chubut Province, Patagonia, Argentina.

Horizon: ?Cerro Castano Member, Cerro Barcino Formation (Red Sandstones).

Biostratigraphy:

Age: Aptian-Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary premaxilla, fragmentary maxilla, and fragmentary dentary with teeth.