PBDB Collection

on highway BR 364 (Miocene of Brazil)

Where: Acre, Brazil (9.0° S, 68.8° W: paleocoordinates 9.3° S, 66.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Solimões Formation, Tortonian (11.6 - 7.2 Ma)

• Dating and thickness of the Solimões Formation adopted here follows those proposed by Cunha (2007), which corresponds to the temporal range Eocene–Pliocene age, with an estimated thickness of 2200 m.

•The fossils were collected in the region of the uppermost part of the Solimões Formation. As the formation spans a lot stratigraphic timespan, I suppose that it should be more Neogene in age. It is not clear from the work which is exactly the age of this locality.

•

•This collection had an Eocene-Pliocene age assigned (based on the above). But: Kern et al., 2020: first U/Pb ages of detrital zircon grains from a core drilled in the western Brazilian Amazon showing that the top- most ~95 m sediments of the Solimões Formation have a maximum deposition age of 11.42 ± 0.66 Ma and are deposited during Tortonian (late Miocene) or younger times in the Solimões Basin.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-deltaic; gray, green claystone

• fluvial meandering paleoenvironment

• It represents a strata of expansive clays, greenish gray, rich in phosphates and sulphates. It is possible to see whitish concreted areas on this level, where several bone remains abound, many of which have been rolled or transported.

Size classes: macrofossils, mesofossils

Collected by Carlos E. G. R. Schaefer in 2010

• Those materials are housed in the paleontological collection of the Laboratório de Paleontologia e Osteologia Comparada (LAPOC), of the Museu de Zoologia João Moojen (MZUFV), Departamento de Biologia Animal (DBA), Universidade Federal de Viçosa (UFV), Minas Gerais State, Brazil. The materials are under the acronym MZUFV-P and each specimen received its own register number.

Primary reference: M. B. Silva Lacerda, L. G. Souza, L. S. Lobo, C. E. G. R. Schaefer, and P. S. R. Romano. 2020. New outcrop with vertebrate remains from Solimões Formation (Eocene–Pliocene), Southern Solimões Basin, Acre State, Northern Brazil. Journal of South American Earth Sciences 101:102588:1-14 [E. Vlachos/E. Vlachos/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 209089: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 24.04.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Reptilia
Loricata -	Crocodyliformes indet. Crocodyliformes indet. Hay 1930 crocodilian Referred materials: MZUFV-P 0005; MZUFV-P 0010; MZUFV-P 0011; MZUFV-P 0015; MZUFV-P 0037; MZUFV-P 0038; MZUFV-P 0039; MZUFV-P 0040; MZUFV-P 0044; MZUFV-P 0045; MZUFV-P 0046; MZUFV-P 0047; MZUFV-P 0048; MZUFV-P 0049.
Crocodylia - Alligatoridae	Caimaninae indet., Caiman aff. crocodilus, Melanosuchus cf. niger, Mourasuchus sp. Caimaninae indet. Brochu 1999 crocodilian Referred material: MZUFV-P 0014. Caiman aff. crocodilus Linnaeus 1758 Common caiman Referred material: MZUFV-P 0012. Melanosuchus cf. niger Spix 1825 black caiman Referred material: MZUFV-P 0016. Mourasuchus sp. Price 1964 crocodilian Referred material: MZUFV-P 0004; MZUFV-P 0009.
Testudines -	Pleurodira indet. Pleurodira indet. Cope 1865 sideneck turtle Referred material: MZUFV-P 0042.
Testudines - Podocnemididae	Podocnemididae indet. Podocnemididae indet. Cope 1868 sideneck turtle Referred material: MZUFV-P 0013.
Testudines - Chelidae	Chelus sp. Chelus sp. Duméril 1806 sideneck turtle Referred material: MZUFV-P 0006.
Mammalia
Notoungulata - Toxodontidae	Toxodontidae indet. Toxodontidae indet. Scott 1873 notoungulate Referred material: MZUFV-P 0008.