PBDB Collection

Cerro Tortuga, Bajo Trapalcó (Cretaceous to of Argentina)

Where: Río Negro, Argentina (39.8° S, 66.7° W: paleocoordinates 42.6° S, 52.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lower Member (Allen Formation), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• Sediments probably correlate with the Los Alamitos Fm. (paper cites Cione, pers. comm.). Now considered Allen Fm.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified, fine-grained, yellow sandstone and siltstone

• "The fossil-bearing bed consists of friable, yellowish, fine-grained clean sandstone enclosed between siltstone layers."

Size classes: macrofossils, mesofossils

Collected by G. W. Rougier & crew in 2002-2004; reposited in the MLP

Collection methods: bulk, surface (float), sieve,

Primary reference: A. M. Albino. 1994. Una nueva serpiente (Reptilia) en el Cretácico Superior de Patagonia, Argentina. Pesquisas 21:58-63 [J. Alroy/J. Wertheim/J. Wertheim]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48999: authorized by John Alroy, entered by Jill Wertheim on 05.04.2005, edited by Matthew Carrano, Philip Mannion, Evangelos Vlachos and Franco Aspromonte

Creative Commons license: CC BY (attribution)

Taxonomic list

• Many other vertebrates from site, but none specified.

•'Snakes, turtles, dinosaurs, frogs and fishes' (Apesteguia & Rougier 2007)

Show authors, comments, and common names

unclassified
-	Teioidea indet.⁴ Teioidea indet.⁴ MML-PV 1064, isolated fragment of right maxilla
Mammalia
Dryolestoidea - Dryolestidae	Groebertherium allenensis³, Groebertherium allenensis³ Groebertherium allenensis³ Rougier et al. 2009 mammal MML-Pv 14 Groebertherium allenensis³ Rougier et al. 2009 mammal MML-Pv 13 (holotype)
Meridiolestida -	Solanutherium walshi³ Solanutherium walshi³ Connelly et al. 2024 mammal MML-Pv 17
Meridiolestida - Mesungulatidae	Mesungulatum lamarquensis n. sp.⁷ Mesungulatum lamarquensis n. sp.⁷ Rougier et al. 2009 mammal MML-Pv 10 (holotype). 10-12
Allotheria -	Trapalcotherium matuastensis n. gen. n. sp.⁷ Trapalcotherium matuastensis n. gen. n. sp.⁷ Rougier et al. 2009 TrapalcÃ³ beast MML-Pv 16 (holotype)
Reptilia
Squamata -	Pleurodonta indet.⁴, Scincoidea indet.⁴ Pleurodonta indet.⁴ squamates MML-PV 1065, isolated fragment of left maxilla Scincoidea indet.⁴ Oppel 1811 squamates MML-PV 1066, isolated partial left maxilla
Squamata - Aniliidae	Australophis anilioides n. gen. n. sp.⁶ Australophis anilioides n. gen. n. sp.⁶ Gómez et al. 2008 southern snake MML-PV181
Squamata - Madtsoiidae	Alamitophis elongatus Alamitophis elongatus Albino 1994 snake MLP 88-III-31-1
Aves
Charadriiformes - Cimolopterygidae	cf. Cimolopterygidae indet.¹, Lamarqueavis australis n. gen. n. sp.¹ cf. Cimolopterygidae indet.¹ Brodkorb 1963 shorebird MML 208 (proximal end of left coracoid lacking omal extremity) Lamarqueavis australis n. gen. n. sp.¹ Agnolin 2010 shorebird MML 207 (holotype), right coracoid with damaged sternal and omal extremities, and lacking acrocoracoidal process)
Amphibia
Salientia - Calyptocephalellidae	Calyptocephalellidae indet.⁸, Calyptocephalella satan n. sp.² Calyptocephalellidae indet.⁸ Reig 1960 frog MML-PV 874-876, MML-PV 886, MML-PV 873, MML-PV 1033-1041 MML-PV 1043-1046, MML-PV 1048-1056 Calyptocephalella satan n. sp.² Agnolin 2012 frog MML 870 (holotype), right incomplete maxilla
Salientia - Pipidae	Pipidae indet.², Kuruleufenia xenopoides⁵ Pipidae indet.² Gray 1825 clawed frog MML 856 (incomplete distal end of right humerus) and 871 (presacral vertebra) Kuruleufenia xenopoides⁵ Gómez 2016 clawed frog MML-PV 1057-1058, two otic capsules; 1059, incomplete sacro-urostyle: 1042, two incomplete humeri; 1060, incomplete ilia; 1047, vertebrae; 1062-1063, presacrals

¹Agnolin 2010; ²Agnolin 2012; ³Connelly et al. 2024; ⁴Garberoglio et al. 2024; ⁵Gómez 2016; ⁶Gómez et al. 2008; ⁷Rougier et al. 2009; ⁸Suazo Lara and Gómez 2022