La Buitrera (lower) (Cretaceous of Argentina)

Also known as Buitreraptor type site, Hoyada de los esfenodontes

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

• coordinate stated in text

• small collection-level geographic resolution

When: Candeleros Formation (Neuquén Group), 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

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, Jason Head, Philip Mannion, John Alroy, Roger Benson and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
Pleurodira indet.5 Cope 1865 sideneck turtle
 Avetheropoda - Alvarezsauridae
Alnashetri cerropoliciensis n. gen. n. sp.4 Makovicky et al. 2012 coelurosaur
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
 Avetheropoda - Dromaeosauridae
Buitreraptor gonzalezorum n. gen. n. sp. Makovicky et al. 2005 coelurosaur
MPCA 245
 Loricata -
Araripesuchus sp.6 Price 1959 crocodilian
MPCA-PV 236
Araripesuchus buitreraensis n. sp.6 Pol and Apesteguía 2005 crocodilian
MPCA-PV 235
 Squamata - Iguanidae
? Iguanidae indet.1 Oppel 1811 lizard
MPCA 250
 Squamata -
Najash rionegrina n. gen. n. sp.3
Najash rionegrina n. gen. n. sp.3 Apestiguía and Zaher 2006 snake
 Rhynchocephalia -
"Priosphenodon avelasi n. gen. n. sp." = Kaikaifilusaurus calvoi2
"Priosphenodon avelasi n. gen. n. sp." = Kaikaifilusaurus calvoi2 Simon and Kellner 2003 rhynchocephalian
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.
Mammalia
 Meridiolestida -
Cronopio dentiacutus n. gen. n. sp.7
Cronopio dentiacutus n. gen. n. sp.7 Rougier et al. 2011 mammal