Agua de Las Catas, Ischigualasto: Carnian, Argentina
collected by G. Scaglia, J. Bonaparte, R. Herbst, M. Vince - 1962

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Venaticosuchus rusconii n. gen., n. sp. Bonaparte 1970
Bonaparte 1975 1 individual
PVL 2578, partial skull
Trialestes romeri (Reig 1963)
Lecuona et al. 2016 1 individual
PVL 3889, incomplete, partially articulated postcranial skeleton
Pisanosaurus mertii n. gen., n. sp. Casamiquela 1967
1 individual
PVL 2577, partial skeleton (4 measurements)
see common names

Geography
Country:Argentina State/province:La Rioja County:General Lavalle
Coordinates: 30.0° South, 68.0° West (view map)
Paleocoordinates:46.6° South, 33.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Carnian 10 m.y. bin:Triassic 3
*Period:Late/Upper Triassic
Key time interval:Carnian Other zone: Scaphonyx-Exaeretodon-Herrerasaurus
Age range of interval:237.00000 - 227.00000 m.y. ago
Age estimate:231.5 to 229 Ma (Ar/Ar)
* legacy (obsolete) database fields
Stratigraphy
Formation:Ischigualasto
Stratigraphic resolution:group of beds
Stratigraphy comments: Pisanosaurus was reportedly collected from the "middle third" of the formation (e.g. Bonaparte 1982, JVP 2:362-371; Rogers et al. 1993, Science 260:794). This was used to suggest a Norian age for Pisanosaurus (see Langer et al. 2010, Biol. Reviews). More recently, however, Martinez et al. (2011, Science 331: 206) placed Pisanosaurus within their "Scaphonyx-Exaeretodon-Herrerasaurus biozone" corresponding to the lower part of the formation and a "narrow temporal interval from 231.5 to 229 Ma in the latter half of the Carnian stage"
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Degree of concentration:dispersed
Size of fossils:macrofossils
Spatial orientation:life position
Preservation of anatomical detail:medium
Associated major elements:all
Fragmentation:frequent
Temporal resolution:snapshot
Collection methods and comments
Collection methods:mechanical,field collection,survey of museum collection
Reason for describing collection:taxonomic analysis
Collectors:G. Scaglia, J. Bonaparte, R. Herbst, M. Vince Collection dates:May-Jul 1962
Collection method comments: PVL: Instituto Miguel Lillo, Tucuman
Metadata
Also known as:Hoyada del Cerro Las Lajas, Pisanosaurus type
Database number:26452
Authorizer:M. Carrano, R. Butler Enterer:M. Carrano, R. Butler
Modifier:G. Varnham Research group:vertebrate
Created:2002-10-15 19:33:54 Last modified:2022-02-01 09:38:29
Access level:the public Released:2002-10-15 19:33:54
Creative Commons license:CC BY
Reference information

Primary reference:
7278. R. M. Casamiquela. 1967. Un nuevo dinosaurio ornitisquio triasico (Pisanosaurus mertii; Ornithopoda) de la Formación Ischigualasto, Argentina [A new Triassic ornithischian dinosaur (Pisanosaurus mertii; Ornithopoda) from the Ischigualasto Formation, Argentina]. Ameghiniana 4(2):47-64 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

47032 J. F. Bonaparte. 1975. The Family Ornithosuchidae (Archosauria: Thecodontia). Colloque International de la Centre National de Recherche Scientifique 218:485-502 [R. Butler/R. Butler]
13922ETE J. F. Bonaparte. 1976. Pisanosaurus mertii Casamiquela and the origin of the Ornithischia. Journal of Paleontology 50(5):808-820 [M. Carrano/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]
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]
73941 J. B. Desojo, L. E. Fiorelli, M. D. Ezcurra, A. G. Martinelli, J. A. S. Ramezani Da Rosa, M. Belén Baczko, M. Jimena Trotteyn, F. C. Montefeltro, M. Ezpeleta and M. C. Langer. 2020. The Late Triassic Ischigualasto Formation at Cerro Las Lajas (La Rioja, Argentina): fossil tetrapods, high‑resolution chronostratigraphy, and faunal correlations. Scientific Reports 10:12782:1-34 [M. Carrano/M. Carrano]
32304 R. B. Irmis, W. G. Parker, S. J. Nesbitt and J. Liu. 2007. Early ornithischian dinosaurs: the Triassic record. Historical Biology 19(1):3-22 [R. Butler/R. Butler/M. Carrano]
31985 M. C. Langer, M. D. Ezcurra, J. S. Bittencourt and F. E. Novas. 2010. The origin and early evolution of dinosaurs. Biological Reviews 85:55-110 [R. Butler/R. Butler/M. Carrano]
60797 A. Lecuona, M. D. Ezcurra, and R. B. Irmis. 2016. Revision of the early crocodylomorph Trialestes romeri (Archosauria, Suchia) from the lower Upper Triassic Ischigualasto Formation of Argentina: one of the oldest-known crocodylomorphs. Papers in Palaeontology 2(4):585-622 [R. Butler/R. Butler/P. Mannion]
48761 R. N. Martínez, C. Apaldetti, O. A. Alcober, C. E. Colombi, P. C. Sereno, E. Fernandez, P. Santi Malnis, G. A. Correa, and D. Abelin. 2013. Vertebrate succession in the Ischigualasto Formation. In P. C. Sereno (ed.), Basal Sauropodomorphs and the Vertebrate Fossil Record of the Ischigualasto Formation (Late Triassic: Carnian–Norian) of Argentina. Society of Vertebrate Paleontology Memoir 12. Journal of Vertebrate Paleontology 32(6 (s1)):10-30 [M. Carrano/M. Carrano/M. Carrano]
61518 D. B. Weishampel and J. B. Weishampel. 1983. Annotated localities of ornithopod dinosaurs: implications to Mesozoic paleobiogeography. The Mosasaur 1:43-87 [M. Carrano/M. Carrano]