Par-Aik, Río Sehuen: Campanian, Argentina
collected by C. Ameghino 1890

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Loncosaurus argentinus n. gen., n. sp. Ameghino 1899
1 specimen
nomen dubium belonging to Iguanodontia
femur, MACN 1629
Reptilia - Theropoda
Theropoda indet. Marsh 1881
Huene 1929 1 specimen
tooth, "carnivorous saurischian"
Reptilia
Clasmodosaurus spatula n. gen., n. sp. Ameghino 1898
Huene 1932 3 specimens
nomen dubium belonging to Sauropoda
teeth; Ameghino pers. coll.
see common names

Geography
Country:Argentina State/province:Santa Cruz
Coordinates: 49.6° South, 69.6° West (view map)
Paleocoordinates:52.4° South, 56.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Campanian
Age range of interval:83.60000 - 72.10000 m.y. ago
Stratigraphy
Formation:Cerro Fortaleza
Stratigraphic resolution:bed
Stratigraphy comments: Previously attributed to the Mata Amarilla Formation, but regarded as the Cerro Fortaleza Formation by Sickman et al. (2018), with a Campanian age (Ghiglione et al. 2021)

also listed as Cardiel Formation and Matasiete Formation - orig. the "Guaranitic Formation", found above a layer with Ostrea guaranitica, but the bed coninues below this layer as well.
Lithology and environment
Primary lithology:red lithified sandstone
Includes fossils?Y
Lithology description: "a bank of red sandstone"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:poor
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:frequent
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:MACN
Collectors:C. Ameghino Collection dates:1890s
Metadata
Also known as:Rîo Shehuen, Loncosaurus type site, Pari Aike
Database number:49095
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:P. Mannion Research group:vertebrate
Created:2005-04-08 08:34:31 Last modified:2023-08-03 05:44:17
Access level:the public Released:2005-04-08 08:34:31
Creative Commons license:CC BY
Reference information

Primary reference:
52115. F. Ameghino. 1899. Nota preliminar sobre el Loncasaurus argentinus un representante de la familia de los Megalosauridae en la República Argentina [Preliminary note on Loncasaurus argentinus, a representative of the family Megalosauridae in the Argentine Republic]. Anales de la Sociedad Científica Argentina 47:61-62 [M. Carrano/M. Carrano]

Secondary references:

52201 F. Ameghino. 1900. L'age des formations sédimentaires de Patagonie [The age of the sedimentary formations of Patagonia]. Anales de la Sociedad Científica Argentina 50(4):145-165 [M. Carrano/M. Carrano]
64160 F. Ameghino. 1906. Les formations sédimentaires du Crétacé supérieur et du Tertiare de Patagonie, avec un parallèle entre leurs faunes mammalogiques et celles de l’ancien continent [The sedimentary formations of the Upper Cretaceous and Tertiary of Patagonia, with a parallel between their mammalian faunas and those of the Old World]. Anales del Museo Nacional de Buenos Aires, serie 3e 7:1-508 [M. Carrano/M. Carrano]
59610 J. F. Bonaparte. 1978. El Mesozoico de America de Sur y sus Tetrapodos [The Mesozoic of South America and its tetrapods]. Opera Lilloana 26:1-596 [M. Carrano/M. Carrano]
55148 J. F. Bonaparte. 1979. Faunas y paleobiogografia de los tetrápodos mesozoicos de América del Sur [Faunas and paleobiogeography of the Mesozoic tetrapods of South America]. Ameghiniana 16(3–4):217-238 [M. Carrano/M. Carrano]
16547ETE J. F. Bonaparte. 1996. Cretaceous tetrapods of Argentina. Münchner Geowissenschaften Abhandlungen 30:73-130 [M. Carrano/M. Carrano/M. Carrano]
13111ETE R. A. Coria. 1999. Ornithopod dinosaurs from the Neuquén Group, Patagonia, Argentina: phylogeny and biostratigraphy. In Y. Tomida, T. H. Rich, and P. Vickers-Rich (eds.), Proceedings of the Second Gondwanan Dinosaur Symposium, National Science Museum Monographs 15:47-60 [M. Carrano/M. Carrano/M. Carrano]
25672ETE R. A. Coria, A. V. Cambiaso, and L. Salgado. 2007. New records of basal ornithopod dinosaurs in the Cretaceous of north Patagonia. Ameghiniana 44(2):473-477 [M. Carrano/M. Carrano]
9242 R. A. Coria and L. Salgado. 1996. "Loncosaurus argentinus" Ameghino, 1899 (Ornithischia, Ornithopoda): a revised description with comments on its phylogenetic relationships. Ameghiniana 33(4):373-376 [M. Carrano/M. Carrano/J. Alroy]
76421 R. A. Coria and L. Salgado. 1999. Los dinosaurios de Ameghino [The dinosaurs of Ameghino]. Ameghiniana 36(4 (suppl.)):27R [M. Carrano/M. Carrano]
76413 P. Cruzado-Caballero, L. S. Filippi, A. H. Méndez, A. C. Garrido, and R. D. Juárez Valieri. 2016. New record of ornithopod dinosaur from the Plottier Formation (Upper Cretaceous), Patagonia, Argentina. Annales de Paléontologie 102:145-150 [M. Carrano/M. Carrano]
75729 P. Cruzado-Caballero, L. S. Filippi, A. H. Méndez, A. C. Garrido, and I. Díaz-Martínez. 2018. First ornithopod remains from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous), northern Patagonia, Argentina. Cretaceous Research 83:182-193 [M. Carrano/M. Carrano/M. Carrano]
59060 F. v. Huene. 1929. Los sauriquios y ornitisquios del Cretáceo argentino. Anales del Museo de La Plata, serie 2 3:1-196 [M. Carrano/M. Carrano]
29483ETE F. v. Huene. 1932. Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte [The fossil reptile order Saurischia, their development and history]. Monographien zur Geologie und Palaeontologie, serie 1 4(1-2):1-361 [M. Carrano/M. Carrano]
76422 S. F. Poropat. 2019. Final report. Winston Churchill Memorial Trust of Australia 1-56 [M. Carrano/M. Carrano/M. Carrano]
13712ETE J. E. Powell. 2003. Revision of South American titanosaurid dinosaurs: palaeobiological, palaeobiogeographical and phylogenetic aspects. Records of the Queen Victoria Museum Launceston 111:1-173 [M. Carrano/M. Carrano/M. Carrano]
52168 S. Roth. 1900. Einige Bemerkungen über Herrn Ameghino's "Sinopsis Geologico y Paleontologica" [Some remarks concerning Mr. Ameghino's "Sinopsis Geologico y Paleontologica"]. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie 1900(1):224-230 [M. Carrano/M. Carrano]