Fundstelle TAR-31, Peru - Evolution der Primaten

TAR-31, Peru

Fundort:

TAR-31, Peru, San Martin, Peru

Taxon:

Neosaimiri fieldsi aus der Familie Cebidae

Fossilien und Beschreibung der Fundstelle:

8 Fossilien gefunden:
Bezeichng.	Anzahl	Körpert./Zahn	Abkürzg.
UCMP 39205	1	unterer Schneidezahn	(Lower i2)
UCMP 39205	1	unterer Prämolar	(Lower p2)
UCMP 39205	1	unterer Prämolar	(Lower p3)
UCMP 39205	1	unterer Prämolar	(Lower p4)
UCMP 39205	1	unterer Molar	(Lower m1)
UCMP 39205	1	unterer Molar	(Lower m1)
UCMP 39205	1	unterer Molar	(Lower m2)
UCMP 39205	1	unterer Molar	(Lower m2)

Macrofossils, Boivin et al. (2021): These levels were originally mapped as belonging to the lower member of Ipururo Formation (middle Miocene in age in the Huallaga basin) [Antoine et al. 2021], an assignation in agreement with the nature of their facies and depositional environment sequence. The fossil content of the TAR-31 encompasses plants, amber clasts, crabs, chondrichthyans, osteichthyans, anurans, chelonians, crocodylomorphs, birds, and mammals (including metatherians, xenarthrans, liptoterns, notungulates, sirenians, chiropterans, primates, and caviomorph rodents). The TAR-31 mammal assemblage includes a didelphid marsupial (currently under study by one of us, NSS), the interatheriine notoungulate Miocochilius sp., the didolodontid Megadolodus sp., the platyrrhine primate Neosaimiri aff. fieldsi [Marivaux et al. 2020], and the caviomorph fauna described here (see ‘Age of TAR-31’ section of this present work). This assemblage recalls some of the Laventan SALMA localities: Quebrada Honda in Bolivia (13.112.2 Ma) [Gibert et al. 2020], the Fitzcarrald local fauna in SE Peru [Tejada-Lara et al. 2015], and especially the lower part of the Villavieja Formation in the La Venta area in Colombia (13.8–11.6 Ma; [Flynn et al. 1007] and see above). Accordingly, the TAR-31 locality most likely documents the late middle Miocene Laventan SALMA [Marivaux et al. 2020]., Boivin et al. (2021): TAR-31 consists of a 10–15 cm-thick yellow microconglomerate interbedded within a grey cross-stratified and sandstone-dominated fluvial unit (Fig 2A [Marivaux et al. 2020]). The latter is intercalated between thick violin-grey variegated paleosols pointing to the existence of a meandering river with a sustainable floodplain [Marivaux et al. 2020].

Geschätztes Alter
der Fundstelle:

zwischen 11,62 und 13,82 Millionen Jahre aus der Ipururo Formation in Peru

Geologie, Sratigraphie

Serravallian / Serravallian / Ipururo

Koordinaten:

6° 35 ' 26 '' S, 76° 18 ' 33 '' W

Die Daten sowie die folgende Systematik stammen aus der Paleobiology Database, Lizenz

Literatur L. Marivaux, W. Aguirre-Diaz, A. Benites-Palomino, G. Billet, M. Boivin, F. Pujos, R. Salas-Gismondi, J. V. Tejada-Lara, R. M. Varas-Malca, P. O. Antoine 2020, New record of Neosaimiri (Cebidae, Platyrrhini) from the late Middle Miocene of Peruvian Amazonia. Journal of Human Evolution. 146:102835, p. 1 - 11, DOI: https://doi.org/10.1016/j.jhevol.2020.102835
Systematik Platyrrhini Cebidae †Tremacebinae †Tremacebus †Tremacebus harringtoni Cebupithecinae †Branisellinae †Branisella †Branisella boliviana Saimiri Saimiri collinsi Saimiri vanzolinii Saimiri ustus Saimiri cassiquiarensis Saimiri sciureus Saimiri boliviensis Saimiri macrodon Saimiri oerstedii †Neosaimiri fieldsi †Neosaimiri annectens Saimiriinae †Panamacebus †Panamacebus transitus Cebinae Cebus Cebus brunneus Cebus cuscinus Cebus annellatus Cebus aequatorialis Cebus albifrons Cebus versicolor Cebus nigrivittatus Cebus olivaceus Cebus capillatus Cebus subcristatus Cebus kaapori Cebus malitiosus Cebus unicolor Cebus cesarae Cebus capucinus Cebus leucocephalus Cebus leucogenys Cebus yuracus Cebus imitator †Dolichocebus †Dolichocebus gaimanensis †Dolichocebus annectens Sapajus †Acrecebus †Acrecebus fraileyi Callitrichinae †Stirtoninae

TAR-31, Peru

Literatur

Systematik