La Amarga (main site): Barremian, Argentina
collected by J. F. Bonaparte, G. Rougier, M. Vince 1983-1986

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Amargasuchus minor n. gen., n. sp. Chiappe 1988
Chiappe 1988 1 individual
MACN-N 12 - holotype (incomplete right maxilla)
Stegosauria indet. (Marsh 1877)
Pereda-Suberbiola et al. 2013 1 specimen
MACN-N 43 (only the worn cervical vertebra from this specimen # is from this site)
    = Amargastegos brevicollus n. gen., n. sp. Ulansky 2014
Ulansky 2014
nomen dubium belonging to Stegosauria
Titanosauriformes indet. Salgado et al. 1997
Leanza et al. 2004
Amargasaurus groeberi n. gen., n. sp. Bonaparte 1984
1 individual
(7 measurements)
    = Dicraeosauridae indet.
Bonaparte 1986
    = Amargasaurus cazaui n. gen., n. sp. Salgado and Bonaparte 1991
Salgado and Bonaparte 1991
MACN-N 15
Reptilia - Diplodocidae
Diplodocidae indet. Marsh 1884
Leanza et al. 2004
see common names

Geography
Country:Argentina State/province:Neuquén County:Catan Lil
Coordinates: 39.5° South, 70.2° West (view map)
Paleocoordinates:39.5° South, 35.0° West
Basis of coordinate:estimated from map
Altitude:412 meters
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Barremian 10 m.y. bin:Cretaceous 2
*Period:Early/Lower Cretaceous
*International age/stage:Hauterivian
Key time interval:Barremian
Age range of interval:125.77000 - 121.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:La Amarga Member:Puesto Antigual
Stratigraphic resolution:group of beds
Stratigraphy comments: "lower section" of the La Amarga Formation; basal part of member
Lithology and environment
Primary lithology:micaceous conglomeratic sandstone
Includes fossils?Y
Lithology description: "in slightly conglomeratic micaceous sandstone layers"
Environment:fluvial-lacustrine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Associated major elements:many
Disassociated major elements:some
Temporal resolution:snapshot
Collection methods and comments
Collection excludes:some genera
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collectors:J. F. Bonaparte, G. Rougier, M. Vince Collection dates:1983-1986
Collection method comments: Site discovered by Luis B. Cazau, working with YPF in 1983, then shown to J. F. Bonaparte on the 8a Expedición Paleontológica a la Patagonia in Feb. 1984
Metadata
Database number:13333
Authorizer:M. Carrano, P. Mannion, J. Alroy Enterer:M. Carrano, J. Wertheim, J. Tennant
Modifier:G. Varnham Research group:vertebrate
Created:2002-02-26 15:24:24 Last modified:2022-02-03 04:50:19
Access level:the public Released:2002-02-26 15:24:24
Creative Commons license:CC BY
Reference information

Primary reference:
63573. J. F. Bonaparte. 1984. I dinosauri dell’Argentina [. In G. M. Ronzoni, M. L. Greggio, & T. B. Guarinoni (eds.), Sulle Orme dei Dinosauri 125-143 [M. Carrano/M. Carrano]

Secondary references:

29093ETE S. Apesteguía. 2007. The sauropod diversity of the La Amarga Formation (Barremian), Neuquén (Argentina). Gondwana Research 12:533-546 [M. Carrano/M. Carrano]
16627ETE J. F. Bonaparte. 1986. History of terrestrial Cretaceous vertebrates of Gondwana. Simposio Bioestratigrafía del Paleozoico Inferior: IV Congreso Argentino de Paleontología y Bioestratigrafía, Mendoza, Argentina 2:63-95 [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]
9827 L. M. Chiappe. 1988. A new trematochampsid crocodile from the Early Cretaceous of north-western Patagonia, Argentina and its palaeobiogeographical and phylogenetic implications. Cretaceous Research 9:379-389 [J. Alroy/J. Wertheim/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]
44370 H. A. Leanza, S. Apesteguia, F. E. Novas and M. S. Fuente. 2004. Cretaceous terrestrial beds from the Neuquen Basin (Argentina) and their tetrapod assemblages. Cretaceous Research 25:61-87 [P. Mannion/J. Tennant/J. Tennant]
46299 X. Pereda-Suberbiola, P. M. Galton, H. Mallison and F. E. Novas. 2013. A plated dinosaur (Ornithischia, Stegosauria) from the Early Cretaceous of Argentina, South America: an evaluation. Alcheringa 37(1):65-78 [P. Mannion/J. Tennant/M. Carrano]
5970 L. Salgado and J. F. Bonaparte. 1991. Un nuevo saurópodo Dicraeosauridae, Amargasaurus cazaui gen. et sp. nov., de la Formación La Amarga, Neocomiano de la provincia del Neuquén, Argentina [Amargasaurus cazaui gen. et sp. nov., a new dicraeosaurid sauropod from the La Amarga Formation, Neocomian of Neuquén province, Argentina]. Ameghiniana 28(3-4):333-346 [M. Carrano/M. Carrano/M. Carrano]
66469 R. E. Ulansky. 2014. Evolyutsiya ctegozavrov (Dinosauria; Ornithischia) [Evolution of the stegosaurs (Dinosauria; Ornithischia)]. Dinologia 1-35 [M. Carrano/M. Carrano]