Los Yeguarizos (Miocene to of Argentina)

Where: Chubut, Argentina (42.7° S, 69.7° W: paleocoordinates 43.2° S, 65.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Collón Cura Formation, Langhian to Langhian (16.0 - 11.6 Ma)

• Los Yeguarizos has an area of ∽0.5 km2 and it is constituted by ∽35 m thick of volcaniclastic sediments

•Fossils collected in two different levels in the base of the section, but as the authors do not clearly separate the specimens per level, all the occurrences are grouped into a single collection point for the moment.

Environment/lithology: delta plain; sandstone and siltstone

• Sediments were accumulated into a lacustrine to deltaic sedimentary environment
• Sediments on these sites are dominated by whitish volcaniclastic sandstones and siltstones, with volcaniclastic pebbly sandstones subordinated

Size classes: macrofossils, mesofossils

Collection methods: The materials collected in the localities studied in this work are deposited in the (a): LIEB-PV, Laboratorio de Investigaciones en Evolución y Biodiversidad (PV, Paleovertebrados), Esquel, Argentina; (b): MPEF-PV, Museo Paleontológico Egidio Feruglio - Paleontología de Vertebrados, Trelew, Argentina.

Primary reference: J. Bucher, M. E. Pérez, L. R. González Ruiz, L. D'Elia, and A. Bilmes. 2020. New middle Miocene (Langhian - Serravallian) vertebrate localities in northwestern Patagonia, Argentina: A contribution to high latitude south american land mammal ages sequence. Journal of South American Earth Sciences [E. Vlachos/E. Vlachos]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 215595: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 17.11.2020, edited by Kateryn Pino

Creative Commons license: CC BY (attribution)

Taxonomic list

• It is not clear which taxa were found in this locality
Mammalia
 Xenarthra -
Pilosa indet. edentate
 Cingulata - Peltephilidae
Peltephilus sp. Ameghino 1887 edentate
 Cingulata - Chlamyphoridae
Prozaedyus sp. Ameghino 1891 edentate
Stenotatus sp. Ameghino 1891 edentate
Stenotatus patagonicus Ameghino 1887 edentate
 Cingulata - Glyptodontidae
cf. Paraeucinepeltus raposeirasi Brandoni et al. 2017 glyptodon
 Cingulata - Propalaehoplophoridae
"Propalaehoplophorinae indet." = Propalaehoplophoridae
"Propalaehoplophorinae indet." = Propalaehoplophoridae Ameghino 1891 edentate
 Rodentia - Dinomyidae
Simplimus indivisus Ameghino 1904 caviomorph
 Rodentia - Chinchillidae
Prolagostomus sp. Ameghino 1887 chinchilid
Pliolagostomus sp. Ameghino 1887 chinchilid
 Rodentia - Dasyproctidae
Alloiomys ? sp. Vucetich 1977 caviomorph
 Rodentia -
Eocardia robusta Vucetich 1984 caviomorph
Acarechimys sp. Patterson 1965 caviomorph
Acarechimys minutus Patterson and Pascual 1967 caviomorph
 Rodentia - Octodontidae
Massoiamys obliquus Vucetich 1978 caviomorph
 Rodentia -
Protacaremys denisae Vucetich et al. 1993 caviomorph
 Notoungulata - Toxodontidae
Palyeidodon cf. obtusum Roth 1898 notoungulate
 Notoungulata - Hegetotheriidae
Pachyrukhos moyani Ameghino 1885 notoungulate
 Notoungulata - Interatheriidae
Protypotherium sp. Ameghino 1882 notoungulate
 Placentalia -
Astrapotheria indet. Lydekker 1894 placental
 Marsupialia -
Paucituberculata indet. Ameghino 1894 marsupial
 Paucituberculata - Palaeothentidae
Palaeothentes cf. serratus Engelman et al. 2017 marsupial
 Polydolopimorphia - Argyrolagidae
cf. Hondalagus sp. Villarroel and Marshall 1988 metatherian
Reptilia
 Testudines - Testudinidae
Chelonoidis sp. Fitzinger 1835 turtle
 Squamata -
cf. Tupinambis sp. Daudin 1802 tegu