Genus
Valid Extinct

Argentinonectes

Novas et al. 2026

Argentinonectes is an extinct genus of weddellonectian plesiosaur known from the Late Cretaceous Calafate Formation of Argentina. The genus contains a single species, Argentinonectes calafatensis, known from a partial skeleton.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
1
Group
Sauroptérygiens
Carnivore aquatic, depth=surface Marine
🦴
PBDB ↗ Wikipedia ↗
Classification
Sauropterygia Suborder
›
Plesiosauria Order
›
Plesiosauroidea Superfamily
›
Elasmosauridae Family
›
Weddellonectia Unranked clade
›
Argentinonectes Genus
Fossil sites 1 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
1
Geological formations
Calafate
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
1
Species (1)
Argentinonectes calafatensis 72 Ma
Bibliography
Original description
F. E. Novas, J. D’Angelo, and F. Agnolín, R. Otero, J. Garcia Marsà, S. Casadio, K. Lacovara, M. Isasi. 2026. New plesiosaur from the uppermost Cretaceous of Patagonia sheds light on thoracic and caudal anatomy in plesiosaurs. Cretaceous Research DOI ↗
Bibliography (1)
F. E. Novas, J. D’Angelo, and F. Agnolín, R. Otero, J. Garcia Marsà, S. Casadio, K. Lacovara, M. Isasi. 2026. New plesiosaur from the uppermost Cretaceous of Patagonia sheds light on thoracic and caudal anatomy in plesiosaurs. Cretaceous Research DOI ↗