Genus: Massetognathus ROMER, 1967
Etymology: Greek, masseter, “one that chews” and Greek, gnathos, “jaw”: Chewing jaw.
= Megagomphodon ROMER, 1972
Etymology:

Species: pasucuali ROMER, 1967
Etymology:

Holotype: PULR 10 (former La Plata Museum, No. 65-XI-14-1)

Locality: 2 miles north of the point where the Chanares River debauches into the Camo de Talampaya, western La Rioja Province, Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Skull and dentary.

Referred material:

ABDLA, 2000

PVL 3901, 3902, 3904: Complete skulls and mandibles.

PVL 3903: Skull and mandible.

PVL 3905: Skull, with endocranial cast exposed on the right side.

PVL 3906: Large skull with complete dentition, lacking the right postorbital arch and the otic region.

PVL 4014, 4016: Endocranial casts.

PVL 4168: Skull, with endocranial cast exposed at the dorsal and lateral side.

PVL 4439: Skull and bones of the manus.

PVL 4440: Mandible, femur and bone fragments.

PVL 4441: Mandible, vertebrae, scapula, ischia nad long bone fragments.

PVL 4443: Mandible with a complete dentition, isolated vertebrae, ribs and left pelvis.

PVL 4613: Skull and mandible of a juvenile, with complete upper and lower tooth series, articulated dorsal vertebrae, humerus, proximal portion of the femur, scapula portion of the pelvis and other postcranial elements.
Note: Assocated with Gracilisuchus.

PVL 4614: Maxillary fragment with complete postcanine series.
Note: Assocated with Gracilisuchus.

PVL 4676: Skull lacking right zygomatic arch.

PVL 4726: Skull with 13 postcranines, the most posterior of them erupting.

PVL 4728: Skull and mandible in occlusion.

PVL 4729: Skull with a complete dention.

PVL 5441: Skull prepared to show the nasal septum.

PVL 5443: Dorsal vertebrae, scapular girdle, humerus, radius, ulna, and carpals.

PVL 5444: Postcranal elements.

PVL 5445: Mandible.

 


ROMER, 1970

Locality: Chanares-Gualo region of western Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material:

MCZ 3691: Skeleton.

And 4 disarticulated specimens.

McCABE & NESBITT, 2021

MCZ VPRA-3801:

 


= Massetognathus teruggii ROMER, 1967
Etymology:

Holotype: PULR 13 (forrmer La Plata Museum, No. 65-XI-14-2)

Locality: 2 miles north of the point where the Chanares River debauches into the Camo de Talampaya, western La Rio Province, Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Skull and dentary.

 


= Massetognathus major ROMER, 1972
Etymology: Latin, major, "greater."

Holotype: PULR 11 (former La Plata Museum, No. 64-XI-14-15)

Locality: 4 km southeast of the mouth of the Rio Chanares, La Rioja Province, Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Skull.

 


= Megagomphodon oligodens ROMER, 1972
Etymology:

Holotype: PULR unnumbered (former La Plata Museum No. 64-XI-14-16)

Locality: La Rioja Province, about 6 km ENE of the mouth of the Rio Chanares, Argentina.

Horizon: Los Chanares Formation.

Biostratigraphy:

Age: Ladinian Stage, Upper Mid Triassic Epoch, Late Triassic.

Material: Skull and dentary.

_____________________________________________________________________________________

Species: ochagaviae BARBERENA, 1981
Etymology: In honor of Sr. Valdor Ochagavia de Costa, prepardor do Setor de Paleovertebrates.

Holotype: UFRGS-PV 0255T (G)

Locality: Porto Alegre-Santa Maria, 3.5 km Estacao Prof. Parreira, Melos, Municipal General Camara, RS, Brasil.

Horizon: Santa Maria Formation (Caturrita Formation?).

Biostratigraphy:

Age: Late Ladinian Substage Late Landian Stage, Uppermost Mid Triassic Epoch, Middle Triassic, or ?Julian Substage, ?Early Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull and mandible.

Neotype: MCP 3871-PV
(Note: Setor de Paleovertebrados do Departamento de Paleontologia e Estratigrafia, Instituto de Geociencias, Universidade Fedral do Rio Grande do Sul, PV 0255 T(G), is now lost and MCP 3871-PV was replaced as the holotype by LIU, SOARES & REICHEL, 2008)

Locality: Rincao do Pinhal No Municipio de Agudo, Sanga Pascula no Municipio de Candelaria, Rio Grande do Sul State, Brazil.

Horizon: Santa Maria Formation (Caturrita Formation?).

Biostratigraphy:

Age: Late Ladinian Substage Late Landian Stage, Uppermost Mid Triassic Epoch, Middle Triassic, or ?Julian Substage, ?Early Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Skull without mandible.

Referred material:

TEIXEIRA, 1987

UFRGS PV 0239T, PV 0244T, PV 0245T, PV 0246T: Skulls.

LIU, SOARES & REICHEL, 2008

UFRGS PV0070T, 0071T, 0122T, 0125T, 0241T, 0243T, 0265T, 0273T, 0397T, 1064T, AMNH 7802, 7803, 21400-21420: Skulls.