La Amarga (main site) (Cretaceous to of Argentina)

Where: Neuquén, Argentina (39.5° S, 70.2° W: paleocoordinates 39.5° S, 35.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Puesto Antigual Member (La Amarga Formation), Barremian to Barremian (129.4 - 122.5 Ma)

• "lower section" of the La Amarga Formation; basal part of member

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; micaceous, conglomeratic sandstone

• "in slightly conglomeratic micaceous sandstone layers"

Size class: macrofossils

Collected by J. F. Bonaparte, G. Rougier, M. Vince in 1983-1986

Collection methods: quarrying,

• Site discovered by Luis B. Cazau, working with YPF in 1983, then shown to J. F. Bonaparte on the 8a Expedición Paleontológica a la Patagonia in Feb. 1984

Primary reference: J. F. Bonaparte. 1984. I dinosauri dell’Argentina [. In G. M. Ronzoni, M. L. Greggio, & T. B. Guarinoni (eds.), Sulle Orme dei Dinosauri 125-143 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13333: authorized by Matthew Carrano, entered by Matthew Carrano on 26.02.2002, edited by Jill Wertheim and Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia - Dicraeosauridae
Amargasaurus cazaui n. gen. n. sp.3
Amargasaurus cazaui n. gen. n. sp.3 Salgado and Bonaparte 1991 dicraeosaurid
 Saurischia - Diplodocidae
 Saurischia -
Titanosauriformes indet.2 Salgado et al. 1997 sauropod
 Ornithischia -
Amargastegos brevicollus n. gen. n. sp.4
Amargastegos brevicollus n. gen. n. sp.4 Ulansky 2014 ornithischian
MACN-N 43, worn cervical vertebra
 Loricata - Trematochampsidae
Amargasuchus minor n. gen. n. sp.1
Amargasuchus minor n. gen. n. sp.1 Chiappe 1988 Amarga crocodile
MACN-N 12 - holotype (incomplete right maxilla)