4.6 km East of “Salinas de Trapal-Có” (Salinas de Trapalco) (Cretaceous to of Argentina)

Where: Río Negro, Argentina (39.7° S, 66.7° W: paleocoordinates 42.6° S, 52.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Allen Formation (Malargüe Group), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• The age of the Allen Formation may be late Campanian and it is conceivable that it may also represent the early Maastrichtian (Hugo and Leanza, 2001a,b), considering that the earliest foraminiferal records in the overlying Jagüel Formation are mid-Maastrichtian (Náñez and Concheyro, 1996).

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithology not reported

• The Allen Formation displays a varied spectrum of continental sedimentary facies, mostly representing fluvial and lacustrine environments. However, Uliana and Dellapé (1981) suggested a littoral to restricted marine environment for this lithostratigraphic unit. Likewise, Barrio (1991) differentiated two sectors in the basin; while in the eastern sector the facies association represents an intertidal environment, the western section suggests a tide-dominated estuary.
• The formation is composed mainly of a lower red or yellowish psammitic member, a middle lacustrine section with grey-greenish shale, and an upper part with gypsum, limestone, and stromatolitic limestone (Andreis et al., 1974)

Size class: macrofossils

Collected by M. Reguero and A. Carlini in 1986-1988

Collection methods: surface (float), surface (in situ)

• collected in 1986 (MLP 86-IV-5-2) and 1988 (MLP 88-III-31-97–101) by M. Reguero and A. Carlini (Museo de La Plata), respectively

Primary reference: J. Sterli, M. S. de la Fuente, and I. A. Cerda. 2013. A new species of meiolaniform turtle and a revision of the Late Cretaceous Meiolaniformes of South America. Ameghiniana 50(2):240-256 [R. Benson/R. Benson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 145698: authorized by Roger Benson, entered by Roger Benson on 08.06.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudinata -
Trapalcochelys sulcata n. gen. n. sp.
Trapalcochelys sulcata n. gen. n. sp. Sterli et al. 2013 turtle
MLP 88-III-31-89–96 identified by Broin and de la Fuente (1993) as Meiolaniidae indet., this is now included in MLP 86-IV-5-2, the holotype of Trapalcochelys sulcata