La Angostura, Margin of Piraí River (Y70) (Miocene to of Bolivia)

Also known as 50 km southwest of Santa Cruz de la Sierra

Where: Santa Cruz, Bolivia (18.2° S, 63.5° W: paleocoordinates 18.4° S, 60.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Yecua Formation, Serravallian to Serravallian (13.8 - 7.2 Ma)

• Level Y20 - low in the formation

•The Yecua formation is estimated to be 12.4–8/7.17Ma old on the basis of U-Pb chronologic dates (Uba et al., 2007; 2009).

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; quartzose, green sandstone

• lowland shallow freshwater lakes and rivers
• Green-purple laminate pelitic sequence, consisting of 10−20 cm of very coarse quartzose massive sandstones

Size class: macrofossils

Primary reference: D. E. Tineo, P. Bona, L. M. Pérez, G. D. Vergani, G. González, D. G. Poiré, Z. Gasparini and P. Legarreta. 2015. Palaeoenvironmental implications of the giant crocodylian Mourasuchus (Alligatoridae, Caimaninae) in the Yecua Formation (late Miocene) of Bolivia. Alcheringa 39 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167953: authorized by Philip Mannion, entered by Philip Mannion on 10.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudines -
Pleurodira indet.
Pleurodira indet. sideneck turtle
YPFB-LIT-PAL-002 (shell)
 Crocodylia - Alligatoridae
Mourasuchus sp.
Mourasuchus sp. Price 1964 crocodilian
YPFB-LIT-PAL-01 (posterior part of right jugal-quadratojugal, distal portion of a left quadrate, three vertebrae and rib fragments)
Actinopteri
 Teleostei -
Teleostei indet.
Teleostei indet. Müller 1846
YPFB-LIT-PAL-004 (vertebral centrum) - possibly a siluriform
 Siluriformes - Ariidae
cf. Ariidae indet.
cf. Ariidae indet. Berg 1958 Ariid catfish
YPFB-LIT-PAL-003 (proximal fin material)