Genus: Austrotriconodon BONAPARTE, 1986
Etymology: Latin, auster, “south”, Greek, tri-, “three”, Greek, konos, “cone”, and Greek, odon, “tooth”: Southern Tricondont.
= Astrodonodon CIFIELL & MADSEN, 1998 (sic)

Species: mckennai BONAPARTE, 1986
Etymology:

Holotype: MACN-RN21

Locality: 100 m east of the base of Cerro Cauadrado, sec north Estamcia Los Alamitos, zone Arroyo Verde, Southeast Rio Negro Province, Argentina.

Horizon: Los Alamitos Formation.

Biostratigraphy:

Age: Allenian Tetrapoda Assemblage, Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Inferior molar.

Referred material:

BONAPARTE, 1989

MACN-RN 237, MACN-RN 238, MACN-RN 234: Molars.

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Species: sepulvedai BONAPARTE, 1992
Etymology:

Holotype: MACN-RN 239

Locality: Cerro Cuadrado, Estancai Los Alamitos, Zone Arroyo Verde, Rio Negro Province, Argentina.

Horizon: Los Alamitos Formation.

Biostratigraphy:

Age: Allenian Tetrapoda Assemblage, Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Inferior molar.

Referred material:

MACN-RN 240: A right last inferior premolar.

MACN-RN 241: A complete right superior molar.