Where: Santa Cruz, Argentina (51.1° S, 69.1° W: paleocoordinates 51.7° S, 63.4° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Santa Cruz Formation, Santacrucian (17.5 - 16.3 Ma)
• The new localities come from the lowest part of the
•Santa Cruz Formation exposed on the Atlantic coast
• group of beds-level stratigraphic resolution
Environment/lithology: terrestrial; tuffaceous, silty claystone
•The bed varies in thickness up to a maximum of 2 m. When dry, its weathered surfaces are grayish-white to tan, but it is greenish-white in the unweathered state. Deposition must have been rapid, as a number of fossils were observed to extend up to 20 cm into the rock. Neither cross-bedding nor root casts are visible; the fossils lack obvious surface weathering at the time of deposition and often are found in a partially articulated state. It appears that this tuffa- ceous horizon was buried soon after deposition and before a paleosol could be established.
Size classes: macrofossils, mesofossils
Reposited in the MLP
Primary reference: R. F. Kay, S.F. Vizcaino, M. S. Bargo, J. M. G. Perry, F. J. Prevosti and J. C. Fernicola. 2008. Two new fossil vertebrate localities in the Santa Cruz Formation (late early – early middle Miocene, Argentina), ~ 51° South latitude. Journal of South American Earth Sciences 25:187-195 [P. Mannion/M. Kouvari]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 176578: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 17.02.2016, edited by Miranta Kouvari
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
| Aves | |
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Aves indet. Linnaeus 1758 bird | |
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| Mammalia | |
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"Hathlyacynidae indet." = Hathlyacininae
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Cladosictis patagonicus metatherian | |
"Acdestis owenii" = Acdestis oweni4
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"Diadiaphorus sp." = Proterotherium
"Diadiaphorus sp." = Proterotherium Ameghino 1883 placental | |
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Neoreomys sp. Ameghino 1887 caviomorph
Neoreomys australis1 Ameghino 1887 caviomorph MPM-PV 3513, skull, atlas, axis, proximal femur; 3515, skull and dentary; 3516, partial femur; 3517, dentary, astragalus, calcaneum; 3518, rostrum, pelvis, femur fragments and tibia; 3519, skull, dentaries, postcrania; 3520, dentary and humerus; 3521, skull fragment, postcrania; 3522, skull and femur; 3523, skull and proximal femur
Eocardia sp. Ameghino 1887 caviomorph | |
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Spaniomys modestus Ameghino 1887 caviomorph | |
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cf. Homunculus sp. Ameghino 1891 monkey | |
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Astrapotherium sp. Burmeister 1879 placental | |
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Interatherium sp. Ameghino 1887 notoungulate
"Interatherium robustum" = Interatherium extensus2 Fernández et al. 2023 notoungulate MPM-PV 3471, cranium, mandible, humerus; 3527, cranium, mandible, humerus, ulna, femur, tibia; 3528, mandible; 3539, tibia
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Hegetotherium sp. Ameghino 1887 notoungulate | |
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Nesodon sp. Owen 1846 notoungulate
Nesodon imbricatus Owen 1846 notoungulate
Adinotherium sp. Ameghino 1887 notoungulate | |
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Propalaehoplophorus sp. Ameghino 1887 edentate | |
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Proeutatus sp. Ameghino 1891 edentate | |
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Peltephilus pumilus6 Ameghino 1887 edentate MPM-PV 3433, skull and postcrania; MPM-PV 3643, skull and mandible
Peltephilus cf. pumilus Ameghino 1887 edentate | |