Also known as TAR 21
Where: Peru (6.6° S, 76.3° W: paleocoordinates 8.4° S, 70.4° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Deseadan mammal zone, Pozo Shale Member (Pozo Formation), Rupelian to Rupelian (33.9 - 23.0 Ma)
• Mustersan-Tinguirirican SALMAs
•
•Campbell et al. (2021). Our BTD results are also inconsistent with the latest Eocene and earliest Oligocene ages that Antoine et al. (2021) have proposed for the Shapaja localities. Though our analyses do not correctly predict the sequence of the Shapaja localities, the mean estimates for individual species nevertheless range from 31.6 to 20.7 Ma, with composite means for the section ranging from 29.1 to 28.3 Ma. The composite mean estimates for the Shapaja section are all very close to those for Santa Rosa, differing by only 0.42 to 1.0 My across analyses with both broad (effectively “unknown”) and more restricted age priors. These results are consistent with the close correlation of the Shapaja and Santa Rosa sections originally proposed by Boivin et al. (2018). Antoine et al. (2021) note that their placement of the Shapaja localities near the Eocene–Oligocene boundary implies that these faunas include 14 new first appearances in South America (either at the genus, family, or superfamily level), with most of the taxa in question otherwise first known from Deseadan (Upper Oligocene) localities. With the geochronological evidence now available from Santa Rosa, and the biochronological evidence for a close correlation of the Shapaja and Santa Rosa sections, we propose that a more parsimonious explanation for the occurrence of otherwise Deseadan taxa in the Shapaja localities is that those localities are, in fact, Deseadan in age. Given such an age estimate, we suggest that the two positive δ13C excursions identified in the Shapaja chemostratigraphies would be better correlated with those that occur at ∼26.5 and ∼25.5 Ma in the generalized global record (ref. 28, their figure 28.11).
• bed-level stratigraphic resolution
Environment/lithology: "floodplain"; fine-grained sandstone
•Gypsum- and nodule-rich blue/yellow conglomerate intercalated between coarse-grained sandstone channels and floodplain deposits
Size classes: macrofossils, mesofossils
Primary reference: M. Boivin, L. Marivaux, F. Pujos, R. Salas-Gismondi, J. V. Tejada-Lara, R. M. Varas-Malca, and P.-O. Antoine. 2018. Early Oligocene caviomorph rodents from Shapaja, Peruvian Amazonia. Palaeontographica Abteilung A 311(1-6):87-156 [P. Mannion/P. Mannion]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 199562: authorized by Philip Mannion, entered by Philip Mannion on 31.01.2019, edited by Grace Varnham
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Passifloroideae "indet. morphotype 1", Passifloroideae "indet. morphotype 2", cf. Monstera sp., Serrasalminae "indet. 1", Serrasalminae "indet. 2", Pelomedusoidea indet., Plantae indet.
| |
Angiospermae | |
Euphorbiaceae indet. Jussieu 1789 spurge | |
Magnoliopsida | |
Magnoliopsida indet. Cronquist et al. 1996 | |
Charophyceae | |
| |
Gastropoda | |
Gastropoda "indet. turriform" Cuvier 1795 snail
Gastropoda "indet. bulliform" Cuvier 1795 snail | |
| |
Malacostraca | |
| |
unclassified | |
Vertebrata indet. Lamarck 1801 | |
Chondrichthyes | |
? Myliobatis sp. Cuvier 1816 eagle ray
? Rhinoptera sp. Cuvier 1829 cownose ray | |
| |
Osteichthyes | |
Lepidosirenidae indet. Stirton 1953 Australian lungfish | |
Amphibia | |
Anura indet. Fischer von Waldheim 1813 frog | |
Mammalia | |
Caviomorpha "gen. et . sp. indet. 1", Caviomorpha "indet. new genus new species", Caviomorpha "indet. 1", Caviomorpha "indet. 5"
Caviomorpha "indet. new genus new species" Wood and Patterson 1955 caviomorph
Caviomorpha "indet. 1" Wood and Patterson 1955 caviomorph
Caviomorpha "indet. 5" Wood and Patterson 1955 caviomorph | |
Eoincamys parvus n. sp., Eoincamys valverdei n. sp.
| |
Kichkasteiromys raimondii n. gen. n. sp., aff. Tarapotomys sp., cf. Tarapotomys sp., Tarapotomys subandinus n. gen. n. sp.
| |
Anthropoidea "indet. 1" Mivart 1864 monkey
Anthropoidea "indet. 2" Mivart 1864 monkey | |
Chiroptera indet. Blumenbach 1779 bat | |
Adianthinae indet. placental | |
Peltephilidae indet. Ameghino 1894 edentate | |
Parastegosimpsonia peruana Ciancio et al. 2012 armadillo | |
Pyrotheria indet. Ameghino 1895 placental | |
Toxodontidae indet. Ameghino 1889 notoungulate | |
Typotheria indet. Zittel 1892 notoungulate | |
Astrapotheriidae indet. Ameghino 1887 placental | |
? Prepidolopidae indet. Pascual 1980 metatherian | |
Proargyrolagus "n. sp. A" Wolff 1984 metatherian | |
Argyrolagoidea indet. Ameghino 1904 metatherian
Bonapartherioidea indet. Goin and Candela 2004 metatherian | |
Palaeothentinae "indet. 2" marsupial
cf. Perulestes sp. Goin and Candela 2004 marsupial | |
Reptilia | |
? Teiidae "indet. morph 1" Gray 1827 squamates | |
| |
? Caimaninae (cf. Purussaurus) sp. Brochu 1999 crocodilian | |
Actinopteri | |
Characiformes "indet. 2" Regan 1911
Characiformes "indet. 4" Regan 1911 | |
Leporinus sp. Lundberg 1997
cf. Leporinus sp. Lundberg 1997 | |
cf. Hydrolycus sp. Lundberg 1997 | |
Siluriformes indet. catfish | |
Loricariidae indet. Gill 1872 catfish |