Arroyo Seco, Cerro Guillermo (lower) [IANIGLA]: Middle Coniacian - Late/Upper Coniacian, Argentina
collected by B. González Riga 1998

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Theropoda indet. Marsh 1881
González-Riga 2003 1 specimen
    = Maniraptora indet. Gauthier 1986
González Riga and Astini 2007
Titanosauridae indet. Lydekker 1885
4 individuals
IANIGLA-PV 065 - holotype; IANIGLA-PV 066-067, 069-074, 077, 079-081
    = Mendozasaurus neguyelap n. gen., n. sp. González-Riga 2003
González-Riga 2003
see common names

Geography
Country:Argentina State/province:Mendoza County:Malargüe
Coordinates: 37.1° South, 69.4° West (view map)
Paleocoordinates:42.4° South, 48.8° West
Basis of coordinate:estimated from map
Altitude:900 meters
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Coniacian 10 m.y. bin:Cretaceous 6
Key time interval:Middle Coniacian - Late/Upper Coniacian
Age range of interval:89.80000 - 86.30000 m.y. ago
Stratigraphy
Geological group:Neuquén Formation:Sierra Barrosa
Stratigraphic resolution:bed
Stratigraphy comments: Sierra Barrosa Formation based on González Riga et al. (2016); upper levels of formation. Orig. Río Colorado Fm. but this has been elevated to a subgroup.
Lithology and environment
Primary lithology:wave ripples,"cross stratification",fine,volcaniclastic,green sandstone
Secondary lithology:gray,red mudstone
Includes fossils?Y
Lithology description: "The fossil-rich level is composed of greenish (10YR 7/2), mica-rich, feldspathic wackes interbedded with mottled red (2.5 YR 4/4) and gray shales." "Facies F stands out, bearing the remains, made up of solid claystones and fine sandstones, reddish with gray speckles and scattered sabulitic clasts, which represent proximal facies of floodplains."
Environment:crevasse splay
Geology comments: "overbank deposits associated with sandy fluvial channels developed on a huge muddy flood plain"; specifically a "proximal overbank" facies
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils
Spatial orientation:preferred
Preservation of anatomical detail:good
Articulated whole bodies:none
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:occasional
Encrustation:none
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:taxonomic analysis
Collectors:B. González Riga Collection dates:1998
Metadata
Also known as:Mendozasaurus type site
Database number:35285
Authorizer:M. Carrano Enterer:M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2003-11-24 10:17:45 Last modified:2023-08-11 14:34:11
Access level:the public Released:2003-11-24 10:17:45
Creative Commons license:CC BY
Reference information

Primary reference:
85642. B. J. González Riga. 1999. Hallazgo de Titanosauridae (Dinosauria-Saurischia) en el Cretácico Superior de la provincia de Mendoza, Argentina [Discovery of Titanosauridae (Dinosauria-Saurischia) in the Upper Cretaceous of Mendoza province, Argentina]. XIV Jornadas Argentinas de Paleontología de Vertebrados, Neuquén y Plaza Huincul, 18 al 20 de mayo de 1998, Resúmenes. Ameghiniana 36(1):102 [M. Carrano/M. Carrano]

Secondary references:

69251 L. S. Filippi. 2015. Los dinosaurios Sauropoda del Cretácico Superior del norte de la Cuenca Neuquina, Patagonia Argentina [The sauropod dinosaurs from the Upper Cretaceous of the north of the Neuquén Basin, Argentine Patagonia]. Boletín del Instituto de Fisiografía y Geología 85:19-28 [M. Carrano/M. Carrano]
76418 B. González Riga. 1999. Descripción preliminar de un nuevo Titanosauria (Dinosauria, Saurischia) del Cretácico Superior de la provincia de Mendoza, Argentina [Preliminary description of a new Titanosauria (Dinosauria, Saurischia) from the Upper Cretaceous of Mendoza province, Argentina]. XV Jornadas Argentinas de Paleontología de Vertebrados, Resúmenes. Ameghiniana 36(4 (suppl.)):13R [M. Carrano/M. Carrano/M. Carrano]
76466 B. J. González Riga. 2003. Bioestratinomía y fosildiagénesis de un sitio paleontológico con saurópodos Titanosauridae del Cretácico Tardío de Mendoza, Argentina [Biostratinomy and fossil diagenesis of a paleontological site with Titanosauridae sauropods from the Late Cretaceous of Mendoza, Argentina]. Ameghiniana 40(4 (suppl.)):58R [M. Carrano/M. Carrano/M. Carrano]
24659ETE B. J. González Riga and R. A. Astini. 2007. Preservation of large titanosaur sauropods in overbank fluvial facies: a case study in the Cretaceous of Argentina. Journal of South American Earth Sciences 23:290-303 [M. Carrano/M. Carrano]
31429ETE B. J. González Riga, J. O. Calvo, and E. Previtera. 2009. Análisis tafonómicos de saurópodos titanosaurios en la Cuenca Neuquina (Argentina) y sus implicaciones en estudios sistemáticos [Taphonomic analyses of titanosaur sauropods from the Neuquén Basin (Argentina) and their implications in systematic studies]. Actas de las IV Jornadas Internacionales sobre Paleontología de Dinosaurios y su Entorno. Salas de los Infantes, Burgos 235-241 [M. Carrano/M. Carrano/M. Carrano]
57661 B. J. González Riga, M. C. Lamanna, L. D. Ortiz David, J. O. Calvo, and J. P. Coria. 2016. A gigantic new dinosaur from Argentina and the evolution of the sauropod hind foot. Scientific Reports 6:19165:1-15 [P. Mannion/P. Mannion]
49910 B. J. González Riga and L. Ortiz David. 2014. A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous (Cerro Lisandro Formation) of Mendoza Province, Argentina. Ameghiniana 51(1):3-25 [P. Mannion/P. Mannion/M. Carrano]
9503 B. J. González-Riga. 2003. A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza Province, Argentina. Ameghiniana 40(2):155-172 [M. Carrano/M. Carrano/M. Carrano]
34689ETE R. D. Juárez Valieri, J. O. Calvo, and S. D. Rios Díaz. 2011. Sauropods crossing formations: biostratigraphical implications for Patagonian faunal assemblages. In J. O. Calvo, J. D. Porfiri, B. J. González Riga, D. Dos Santos (eds.), Dinosaurios y Paleontología desde América Latina. Anales del III Congreso Latinoamericano de Paleontología. Editorial de la Universidad Nacional de Cuyo, Neuquén 153-160 [M. Carrano/M. Carrano]