Hoyada de los esfenodontes 1, La Buitrera: Early/Lower Cenomanian, Argentina
collected by S. Apesteguía
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Meridiolestida
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Cronopio dentiacutus n. gen., n. sp.
Rougier et al. 2011
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Rougier et al. 2011 | 1 individual | ||||||||
| MPCA 454 | ||||||||||
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Reptilia
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Najash rionegrina n. gen., n. sp.
Apestiguía and Zaher 2006
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Apestiguía and Zaher 2006 | 3 individuals | ||||||||
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Reptilia
- Sphenodontidae
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Priosphenodon avelasi n. gen., n. sp.
Apesteguía and Novas 2003
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4 individuals | |||||||||
| synonym of Kaikaifilusaurus calvoi | ||||||||||
| MPCA 300 - holotype (partially articulated, adult skeleton) and referred specimens: MPCA 301 (a juvenile incomplete skeleton), MPCA 302 (postcranial isolated remains) and MPCA 303 (a partially articulated adult skeleton). More than a hundred uncatalogued specimens, including isolated elements and complete skeletons, remain unprepared. | ||||||||||
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Reptilia
- Alvarezsauridae
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Alnashetri cerropoliciensis n. gen., n. sp.
Makovicky et al. 2012
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Makovicky et al. 2012 | 1 individual | ||||||||
| Holotype MPCA-477: partial left femur, distal portions of left and right tibiae, right fibula, proximal tarsals of both ankles, a nearly complete right metatarsus, proximal and distal parts of the left metapodials, left pedal digit III | ||||||||||
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Reptilia
- Dromaeosauridae
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Buitreraptor gonzalezorum n. gen., n. sp.
Makovicky et al. 2005
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Makovicky et al. 2005 | 2 specimens | ||||||||
| MPCA 245, 238, 471D | ||||||||||
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Reptilia
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Pterosauria indet.
(Kaup 1834)
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Makovicky et al. 2012 | |||||||||
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Araripesuchus buitreraensis n. sp.
Pol and Apesteguía 2005
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Pol and Apesteguía 2005 | 1 individual | ||||||||
| MPCA-PV 235 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Río Negro |
| Coordinates: | 39.6° South, 68.7° West (view map) | ||
| Paleocoordinates: | 46.7° South, 44.9° West | ||
| Basis of coordinate: | stated in text | ||
| Altitude: | 466 meters | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Early/Lower Cenomanian | ||
| Age range of interval: | 100.50000 - 93.90000 m.y. ago |
Stratigraphy
| Geological group: | Neuquén | Formation: | Candeleros | Member: | Upper |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: upper member of formation
"it is now considered that the Candeleros Formation is wholly Cenomanian, likely lower Cenomanian (Garrido 2010)" (Rougier et al. 2011) | |||||
Lithology and environment
| Primary lithology: | massive,red lithified sandstone |
| Includes fossils? | Y |
| Lithology description: "massive red sandstones" | |
| Environment: | crevasse splay |
| Geology comments: "rapid overbank flooding events" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | some |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | S. Apesteguía |
Metadata
| Also known as: | He1, La Buitrera Paleontological Area, LBPA | ||
| Database number: | 225915 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2022-06-07 16:23:46 | Last modified: | 2022-06-07 16:29:59 |
| Access level: | the public | Released: | 2022-06-07 16:23:46 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 37372. | S. Apesteguía and F. E. Novas. 2003. Large Cretaceous sphenodontian from Patagonia provides insight into lepidosaur evolution in Gondwana. Nature 425:609-612 [P. Mannion/P. Mannion] |
Secondary references:
| 17335 | S. Apestiguía and H. Zaher. 2006. A Cretaceous terrestrial snake with robust hindlimbs and a sacrum. Nature 440:1037-1040 [J. Head/J. Head] | |
| 14869 | ETE | P. J. Makovicky, S. Apesteguía, and F. L. Agnolín. 2005. The earliest dromaeosaurid theropod from South America. Nature 437:1007-1011 [M. Carrano/K. Maguire/M. Carrano] |
| 43343 | P. J. Makovicky, S. Apesteguia, and F. A. Gianechini. 2012. A new coelurosaurian theropod from the La Buitrera fossil locality of Río Negro, Argentina. Fieldiana: Life and Earth Sciences 5:90-98 [R. Benson/R. Benson/M. Carrano] | |
| 15217 | ETE | D. Pol and S. Apesteguía. 2005. New Araripesuchus remains from the early Late Cretaceous (Cenomanian–Turonian) of Patagonia. American Museum Novitates 3940:1-38 [M. Carrano/M. Carrano] |
| 38410 | G. W. Rougier, S. Apesteguía, and L. C. Gaetano. 2011. Highly specialized mammalian skulls from the Late Cretaceous of South America. Nature 479:98-102 [J. Alroy/J. Alroy] |