Ranquil-Co fossiliferous level 3 (Cretaceous to of Argentina)

Also known as Ranquil-Co

Where: Mendoza, Argentina (36.3° S, 69.6° W: paleocoordinates 38.9° S, 54.8° W)

• coordinate stated in text

When: Loncoche Formation (Malargüe Group), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, medium sandstone and sandstone

• (original in Spanish) Medium-to-fine gray sandstones (feldspathic gravels), solid or cross-stratified, characterized by the development of residual deposits (lag) at the base, with dispersed pelitic clasts, charcoal remains, scarce pelecypods and abundant vertebrate fragments (fishes, amphibians and reptiles), corresponding to the fossiliferous level 3.

Size classes: macrofossils, mesofossils, microfossils

Reposited in the MACN

Collection methods: mechanical

• fossils in MACN, CORD-PZ, IANIGLA-PV

Primary reference: B. J. González Riga. 1999. Hallazgo de vertebrados fósiles en la Formación Loncoche, Cretácico Superior de la provincia de Mendoza, Argentina. Ameghiniana 36:401-410 [E. Vlachos/E. Vlachos/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185024: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 06.04.2017, edited by Franco Aspromonte and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chondrichthyes
 Euselachii -
Rajiformes indet.
Rajiformes indet. Berg 1940 ray
MACN-M 04, teeth
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet.
Lepisosteidae indet. Cuvier 1825 gar
MACN-M 06-08; IANIGLA-PV002, vertebrae
 Teleostei -
Teleostei indet.
Teleostei indet.
MACN-M09; IANIGLA-PV 001, teeth
 Perciformes -
Percoidei indet.
Percoidei indet. Bleeker 1859 perch-like fish
MACN-M08 y M12, dentary plates
Amphibia
 Salientia - Calyptocephalellidae
Calyptocephalellidae indet.3
Calyptocephalellidae indet.3 Reig 1960 frog
MACN-M 14, distal end of right humerus
Reptilia
 Squamata - Boidae
Boidae indet.
Boidae indet. Gray 1825 boa
MACN- M22 y 23, various vertebras
 Theropoda -
Theropoda indet.
Theropoda indet. theropod
CORD-PZ 17325, tooth
 Saurischia -
Titanosauria indet.
Titanosauria indet. Bonaparte and Coria 1993 sauropod
CORD-PZ17326. tooth
 Plesiosauria -
Plesiosauria indet.
Plesiosauria indet. de Blainville 1835 plesiosaur
MACN-M15 y 24; IANIGLIA-Pv 02, vertebra and teeth
 Testudinata -
Meiolaniformes indet.2
Meiolaniformes indet.2 Sterli and de la Fuente 2013 turtle
MACN-M 25-40; CORD-PZ 17316-17324; IANIGLA-Pv004-009; MRM 151, almost complete shell and isolated plates
Osteichthyes
 Dipnoi - Ceratodontidae
Metaceratodus sp.1
Metaceratodus sp.1 Chapman 1914 lungfish
ORD-PZ 17315; MACN-M 10-11, dentary plates
1de la Fuente et al. 2017; 2Sterli et al. 2013; 3Suazo Lara and Gómez 2022