Genus: Mendozasaurus GONZALEZ RIGA, 2003
Etymology: In reference to the Mendoza Province of Argentina, where the specimen was found and Greek, sauros, ‘lizard’.
= Genus nova GONAZLEZ RIGA 1999

Species: neguyelap GONZALEZ RIGA, 2003
Etymology: From neguy, ‘first’, and yelap, ‘beast’, Huarpes indigenous terms (Millcayac language, Marquez Miranda, 1943) referring to the first species of dinosaur discovered in Mendoza Province. The ending of the term yelap has not been modified, since it is not a latin or latinized word (Art. 31.2.3. Comision Internacional de Nomenclatura Zoologica, 2000)

Holotype: IANIGLA-PV 065/1-23

Locality: South of Cerro Guillermo, Malargue Department, Mendoza Province, Argentina.

Horizon: Levels provisionally assigned to the Upper section of the Rio Neuquen Formation (or Rio Neuquen Subgroup according to Leanza adn Hugo, 2001).


Age: Neuquenian Tetrapoda Assemblage, Upper Turonian or Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: 22 mostly articulated caudal vertebrae and 2 anterior cheverons.


IANIGLA-PV 066: Anterior dorsal vertebra.

IANIGLA-PV 067: Sternal plate.

IANIGLA-PV 068: Scapula.

IANIGLA-PV 069: Humerus.

IANIGLA-PV 070/1-2: 4 metacarpals.

IANIGLA-PV 071/1-4: Radius and ulna.

IANIGLA-PV 072: A fragment of pubis.

IANIGLA-PV 073/1-2: Femur and tibia.

IANIGLA-PV 074/1-3: 2 tibiae and fibula.

IANIGLA-PV 077/1-5: 5 metatarsals.

IANIGLA-PV 0078, 079: 2 ungeal phalanges.

IANIGLA-PV 080/1-2, 081/1-2: 4 osteoderms.

Note: Possibly two individuals.

GONZALEZ RIGA, 2003, 2005

IANIGLA-PV 076/1-4: 4 associated cervical vertebrae.

IANIGLA-PV 084: Posterior cervical of an adult.

Number: Not given: Dorsal and caudal vertebrae and limb bones.