La Buitrera (lower) (Cretaceous of Argentina)

Where: Río Negro, Argentina (39.6° S, 68.7° W: paleocoordinates 46.7° S, 44.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Upper Member (Candeleros Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• upper member of formation

•"it is now considered that the Candeleros Formation is wholly Cenomanian, likely lower Cenomanian (Garrido 2010)" (Rougier et al. 2011)

• bed-level stratigraphic resolution

Environment/lithology: fluvial; lithified, red sandstone

• Many of the small vertebrate fossils recovered from this unit are articulated, suggesting that they were entombed by rapid overbank flooding events (Makovicky et al. 2012)
• clearly lithified based on figure of specimen in Rougier et al. 2011

•massive red sandstones

Size class: macrofossils

Collected by González, Makovicky in 1999–2005

Collection methods: quarrying, mechanical,

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55364: authorized by Matthew Carrano, entered by Kaitlin Maguire on 12.10.2005, edited by Matthew Carrano and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Dromaeosauridae
Buitreraptor gonzalezorum
Buitreraptor gonzalezorum Makovicky et al. 2005 maniraptoran
MPCN-PV-598
 Loricata -
Araripesuchus sp.4
Araripesuchus sp.4 Price 1959 crocodilian
MPCA-PV 236
 Squamata - Iguanidae
? Iguanidae indet.1
? Iguanidae indet.1 Oppel 1811 squamates
MPCA 250
 Testudines -
Pleurodira indet.3
Pleurodira indet.3 Cope 1865 sideneck turtle
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus argentinus n. sp.2
Ceratodus argentinus n. sp.2 Apesteguia et al. 2007 lungfish
MPCA 402, left upper tooth plate that lacks most of its first crest
1Apesteguía et al. 2005; 2Apesteguia et al. 2007; 3Maniel and de la Fuente 2012; 4Pol and Apesteguía 2005