Tripailao Farm Sites [MACN]: Santonian, Argentina
collected by J. Bonaparte 1991, 1994–1995

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Theropoda - Avisauridae
Neuquenornis volans Chiappe and Calvo 1994
1 specimen
MACN-RN 977
Reptilia - Hadrosauridae
Hadrosauridae indet. Cope 1869
Cruzado-Caballero et al. 2018
Reptilia
Dinilysia patagonica Woodward 1901
Caldwell and Albino 2001 10 specimens
MACN-RN 976, 1013-1021
see common names

Geography
Country:Argentina State/province:Río Negro
Coordinates: 39.0° South, 68.2° West (view map)
Paleocoordinates:43.6° South, 49.2° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Santonian 10 m.y. bin: Cretaceous 6
Key time interval: Santonian
Age range of interval: 86.3 - 83.6 m.y. ago
Stratigraphy
Geological group:Neuquén Formation:Bajo de la Carpa
Stratigraphic resolution:bed
Stratigraphy comments: Rio Colorado Subgroup
Lithology and environment
Primary lithology:burrows,bioturbation poorly lithified carbonaceous conglomerate
Secondary lithology: lithified sandstone
Lithology description: "The first is a massive, structureless sandstone characterized by a distinct inchnofabric overprinting al primary sedimentological features (Figs. 3, 4). The ichnofabric represents intensive bioturbation of the sediments. It is also important to note that the trace fossils assemblages are particularly well preserved. The top of these beds represent palaeo-surfaces, and we treat these bioturbated beds as paleosols....Observations of beds and lamina at the 1991 quarry show that the lower surface of the quarry is a planar caliche nodule conglomerate with extensive, radiating burrows moving downward into a structureless sandstone. Above the burrowed caliche conglomerate bed is a 40 cm thick bed of structureless sandstone with small, interspaced caliche nodules. The articulated specimen of Dinilysia was found at the contact of the thin bed of caliche conglomerate and the bottom of the non-burrowed bed of structureless sandstone (pg. 208)."
Environment:interdune
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Associated major elements:all
Fragmentation:frequent
Collection methods and comments
Collection methods:selective quarrying,surface (float),field collection
Collection size:4 individuals
Reason for describing collection:paleoecologic analysis
Museum repositories:MACN
Collectors:J. Bonaparte Collection dates:1991, 1994–1995
Collection method comments: Collection includes four skulls and additional associated vertebrae
Metadata
Also known as:Puesto Tripailao, General Roca
Database number:47798
Authorizer:J. Head, M. Carrano Enterer:J. Head, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2005-03-01 20:54:42 Last modified:2021-04-14 15:04:37
Access level:the public Released:2005-03-01 20:54:42
Creative Commons license:CC BY
Reference information

Primary reference:
12947.ETE L. M. Chiappe. 1996. Early avian evolution on the southern hemisphere: the fossil record of birds in the Mesozoic of Gondwana. Memoirs of the Queensland Museum 39(3):533-554 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

12795 M.W. Caldwell and A. M. Albino. 2001. Palaeoenvironment and palaeoecology of three Cretaceous snakes: Pachyophis, Pachyrhachis, and Dinilysia. Acta Palaeontologica Polonica 46(2):203-218 [J. Head/J. Head/J. Head]
48178 L. M. Chiappe. 2007. Aves. In Z. B. Gasparini, L. Sangado & R. A. Coria (eds.), Patagonian Mesozoic Reptiles 257-270 [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]