Confluence of the Laguna and Casa Grande Rivers, Mina Aguilar (Eocene of Argentina)

Where: Jujuy, Argentina (23.3° S, 65.6° W: paleocoordinates 25.8° S, 54.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Vacan mammal zone, Lumbrera Formation (Salta Group), Ypresian (56.0 - 47.8 Ma)

• Lumbrera Formation, below Faja Verde Inferior = Lower Lumbrera assemblage, Vacan SALMA (subdivision of Casamayoran)

•Fernicola et al. 2021 obtained an 238U-206Pb isochron age of 46.2 +/- 7.3 Ma for samples from the Lower Lumberer Fm, suggesting that the Lower section of the formation was deposited between 55–46Ma.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. Fernández; reposited in the MLP

• Museo de La Plata collection

Primary reference: Z. Gasparini. 1984. New Tertiary Sebecosuchia (Crocodylia: Mesosuchia) from Argentina. Journal of Vertebrate Paleontology 4(1):85-95 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92655: authorized by John Alroy, entered by John Alroy on 23.11.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Loricata -
Sebecosuchia indet. crocodilian
MLP 72-IV-4-18 (anterior caudal vertebra)
 Loricata - Sebecidae
Ayllusuchus fernandezi n. gen. n. sp.
Ayllusuchus fernandezi n. gen. n. sp. Gasparini 1984 crocodilian
MLP 72-IV-4-2 - holotype (snout and posterior part of skull)