Unranked clade
Valid Extinct

Rinconsauria

Calvo et al. 2007

Rinconsauria is an extinct clade of titanosaurian sauropods known from the late Cretaceous period of Argentina. All members of this clade are fairly small compared to the largest titanosaurs, at less than around 11 metres (36 ft) long. The membership of Rinconsauria is highly unstable; some phylogenetic analyses find the clade to be restricted to the two genera that define the clade, Rinconsaurus and Muyelensaurus, but over twenty other titanosaur genera have been included in the clade by various analyses.

Temporal range
Triassic
Jurassic
Cretaceous
Paleogene
Neogene
252 201 145 66 0 Ma
PBDB occurrences
14
Group
Dinosaures
Herbivore Ground dwelling, gregarious Terrestrial
Rinconsauria
click to enlarge
A restoration of Rinconsaurus compared to a human , • Based proportionally on fossil elements and skeletal reconstruction featured in the Rinconsaurus description,[1] with missing parts based on other titanosaur reconstructions. The remains of Rinconsaurus represent two adults and a juvenile all of which are incomplete; some of the proportions shown here, such as the neck, limb lengths, and skull shape are not certain. • Osteroderms are not yet known in Rinconsaurus. The osteoderms shown here are based loosely on Mendozasaurus.[2] Osteoderms are known from at least 10 titanosaur genera spread across the family tree but it's not clear if all titanosaurs had them.[3] Titanosaur osteoderms are rare and their layout and position on the body are not certain. [4] • The colours and patterns, as with the majority of reconstructions of prehistoric creatures, are speculative. • Human silhouette approximately 180 cm tall. NOTE: I often update my images. If you want to have any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used. This means that if I update an image, it will be updated on the site as well. Thanks. References ↑ Coria, Jorge; B.J.G. Riga (2003). "Rinconsaurus caudamirus gen. et sp nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina". Revista Geologica de Chile 30 (2): 333–353. ISSN 0716-0208. Retrieved on 2007-05-21. ↑ González Riga B (2003) A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza, Argentina. Ameghiniana 40 (2) ↑ Carrano, M.T. and D’Emic, M.D. 2015 'Osteoderms of the titanosaur sauropod dinosaur Alamosaurus sanjuanensis Gilmore, 1922'. Journal of Vertebrate Paleontology. ↑ Vidal D, Ortega F, Sanz JL (2014) Titanosaur Osteoderms from the Upper Cretaceous of Lo Hueco (Spain) and Their Implications on the Armor of Laurasian Titanosaurs. PLoS ONE 9(8): e102488. doi:10.1371/journal.pone.0102488 © Steveoc 86 · CC BY-SA 3.0 · Wikimedia
PBDB ↗ Wikipedia ↗
Classification
Dinosauria Unranked clade
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Saurischia Unranked clade
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Sauropodomorpha Unranked clade
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Massopoda Unranked clade
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Sauropodiformes Unranked clade
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Sauropoda Unranked clade
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Gravisauria Unranked clade
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Eusauropoda Unranked clade
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Neosauropoda Unranked clade
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Macronaria Unranked clade
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Titanosauriformes Unranked clade
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Somphospondyli Unranked clade
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Titanosauria Unranked clade
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Colossosauria Unranked clade
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Rinconsauria Unranked clade
Fossil sites 14 geolocated sites
Distribution
Top countries
🇦🇷 Argentina
7
🇧🇷 Brazil
6
🇹🇿 Tanzania
1
Geological formations
Adamantina
5
Bajo de la Carpa
2
Ciénaga del Río Huaco
2
Anacleto
2
Galula
1
Plottier
1
Serra da Galga
1
Temporal distribution
Maastrichtian (72.2–66 Ma)
1
Campanian (83.6–72.2 Ma)
9
Santonian (85.7–83.6 Ma)
2
Coniacian (89.8–85.7 Ma)
2
Images 2
Bibliography
Original description
J. O. Calvo, B. J. González Riga, and J. D. Porfiri. 2007. A new titanosaur sauropod from the Late Cretaceous of Neuquén, Patagonia, Argentina. Arquivos do Museu Nacional, Rio de Janeiro 65(4):485-504
Bibliography (12)
F. Agnolin, M. Motta, and J. García Marsá, M. Aranciaga Rolando, G. Alvarez Herrera, N. Chimento, S. Rozadilla, F. Brizzon-Egli, M. Cerroni, K. Panzeri, S. Bogan, S. Casadio, J. Sterli, S. Miquel, S. Martínez, L. Perez, D. Pol, F. Novas. 2025. New fossiliferous locality from the Anacleto Formation (Late Cretaceous, Campanian) from northern Patagonia, with the description of a new titanosaur. Revista del Museo Argentino de Ciencias Naturales 26(2):217-259
E. M. Hechenleitner, L. Leuzinger, and A. G. Martinelli, S. Rocher, L. E. Fiorelli, J. R. A. Taborda, L. Salgado. 2020. Two Late Cretaceous sauropods reveal titanosaurian dispersal across South America. Communications Biology 3:622:1-13 DOI ↗
E. Gorscak, P. M. O'Connor, and N. J. Stevens, E. M. Roberts. 2014. The basal titanosaurian Rukwatitan bisepultus (Dinosauria, Sauropoda) from the middle Cretaceous Galula Formation, Rukwa Rift Basin, southwestern Tanzania. Journal of Vertebrate Paleontology 34(5):1133-1154 DOI ↗
R. A. Coria, L. S. Filippi, and L. M. Chiappe, R. Garcia, A. B. Arcucci. 2013. Overosaurus paradasorum gen. et sp. nov. , a new sauropod dinosaur (Titanosauria: Lithostrotia) from the Late Cretaceous of Neuquén, Patagonia, Argentina. Zootaxa 3683(4):357-376 DOI ↗
E. B. Machado, L. S. Avilla, and W. R. Nava, D. A. Campos, A. W. A. Kellner. 2013. A new titanosaur sauropod from the Late Cretaceous of Brazil. Zootaxa 3701(3):301-321 DOI ↗
A. G. Martinelli, D. Riff, and R. P. Lopes. 2011. Discussion about the occurrence of the genus Aeolosaurus Powell 1987 (Dinosauria, Titanosauria) in the Upper Cretaceous of Brazil. Gaea - Journal of Geoscience 7(1):34-40 DOI ↗
R. M. Santucci and A. C. d. Arruda-Campos. 2011. A new sauropod (Macronaria, Titanosauria) from the Adamantina Formation, Bauru Group, Upper Cretaceous of Brazil and the phylogenetic relationships of Aeolosaurini. Zootaxa 3085:1-33 DOI ↗
L. S. Filippi and A. C. Garrido. 2008. Pitekunsaurus macayai gen. et sp. nov., nuevo titanosaurio (Saurischia, Sauropoda) del Cretácico Superior de la Cuenca Neuquina, Argentina [Pitekunsaurus macayai gen. et sp. nov., new titanosaur (Saurischia, Sauropoda) from the Upper Cretaceous of the Neuquén Basin, Argentina]. Ameghiniana 45(3):575-590
L. Salgado and I. S. Carvalho. 2008. Uberabatitan ribeiroi, a new titanosaur from the Marília Formation (Bauru Group, Upper Cretaceous), Minas Gerais, Brazil. Palaeontology 51(4):881-901 DOI ↗
J. O. Calvo, B. J. González Riga, and J. D. Porfiri. 2007. A new titanosaur sauropod from the Late Cretaceous of Neuquén, Patagonia, Argentina. Arquivos do Museu Nacional, Rio de Janeiro 65(4):485-504
A. W. A. Kellner, D. d. A. Campos, and S. A. K. d. Azevedo, M. N. F. Trotta, D. D. R. Henriques, M. M. T. Craik, H. d. P. Silva. 2006. On a new titanosaur sauropod from the Bauru Group, Late Cretaceous of Brazil. Boletim do Museu Nacional, Nova Série, Geologia 74:1-31
J. O. Calvo and B. J. González Riga. 2003. Rinconsaurus caudamirus gen. et sp. nov., a new titanosaurid (Dinosauria, Sauropoda) from the Late Cretaceous of Patagonia, Argentina. Revista Geológica de Chile 30(2):333-353 DOI ↗