Where: Buenos Aires, Argentina (38.6° S, 58.8° W: paleocoordinates 38.6° S, 58.2° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: San Andrés Formation, Early/Lower Pleistocene (2.6 - 0.8 Ma)
• De Santi et al. 2021: Nine levels are recognized in the Punta Negra profile (Bidegain et al. 2005). The basal levels (PN7 to PN9) with normal polarity are correlated with uncertainty to the Jaramillo subchron around 1.0 Ma, although an older age could not be ruled out. The intermediate levels (PN2 to PN6) record reversed polarity correlated with the post-Jaramillo Matuyama (C1r.1r, i.e. between 0.99 and 0.78). The uppermost level (PN1) with normal polarity is assigned to the Bruhnes chron (<0.78Ma; Fig. 1B).
• group of beds-level stratigraphic resolution
Environment/lithology: terrestrial; silty sandstone
Size classes: macrofossils, mesofossils
Primary reference: N. A. De Santi, D. H. Verzi, A. I. Olivares, P. Piñero, A. and C. C. Morgan. 2021. A new Pleistocene Ctenomys and divergence dating of the hyperdiverse South American rodent family Ctenomyidae. Journal of Systematic Palaeontology 19(5):377-392 [P. Mannion/G. Varnham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 225534: authorized by Philip Mannion, entered by Grace Varnham on 16.05.2022, edited by Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
Olympicomys vossi n. sp.1
Olympicomys vossi n. sp.1 Pardiñas et al. 2002 rodent Holotype: MLP 91-IV-25-179, incomplete right hemimandible with incisor and ml-m3
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Ctenomys rusconii n. sp.
Ctenomys rusconii n. sp. De Santi et al. 2021 caviomorph Holotype: MLP 95-XII-1-19, anterior cranium with the left zygomatic arch, both incisors and DP4–M2 series, and left mandibular corpus with incisor and dp4–m3; MLP 91-IV-25-113, MLP 91- IV-25-117, MLP 91-IV-25-123, MLP 91-IV-25-124, MLP 91-IV-25-125, MLP 91-IV-25-130, MLP 91-IV- 25-162, MLP 91-IV-25-169, MLP 91-IV-25-192, MLP 91-IV-25-201, MLP 97-II-1-70. Some of this sample was originally listed as Ctenomys aff. chapalmalensis by Bidegain et al. (2005)
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Lutreolina tonnii n. sp.2
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