Where: Santa Cruz, Argentina (50.3° S, 72.1° W: paleocoordinates 51.0° S, 66.5° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Los Dos Mellizos Member (Santa Cruz Formation), Santacrucian (17.5 - 16.3 Ma)
• This rock unit, with an approximate weight of 500 m, was divided by Furque into three members (from the oldest to the newest, Los Dos Mellizos, Bon Accord and Los Huelguistas).
• member-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
•
•Furque (1973) notes that the Centinela and Santa Cruz formations can continue south as far as the Bandurrias Stream in Chile. This inference is supported by the fossils collected by Mr. Vidal from the Upper Baguales River (see point 6, above). The fossil mammals of the Santa Cruz Formation found in the Karaikén area (near Bon Accord), at the eastern end of Lake Argentino (Fig. 1), come from Ameghino's "Notohipidense Floor" and were assigned a Lower Santacrucense age ( see Marshall and Pascual, 1977).
Size class: macrofossils
Primary reference: L. G. Marshall and P. Salinas Z. 1990. Vertebrados continentales del Mioceno inferior de Magallanes, Chile. Anales del Instituto de la Patagonia, Serie Ciencias Naturales 19(1):27-38 [P. Mannion/M. Kouvari]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 207604: authorized by Philip Mannion, entered by Miranta Kouvari on 21.01.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
|
Adinotherium ovinum Owen 1846 notoungulate | |
Thoatherium minusculum, "Diadiaphorus mayusculus" = Diadiaphorus majusculus
Thoatherium minusculum Ameghino 1887 placental
"Diadiaphorus mayusculus" = Diadiaphorus majusculus Ameghino 1887 placental | |
|
Proeutatus cf. robustus Scott 1903 edentate | |