Río Bote - Estancia Maria Elisa (Miocene of Argentina)

Also known as Río Bote

Where: Santa Cruz, Argentina (50.4° S, 71.8° W: paleocoordinates 51.1° S, 66.2° W)

• coordinate stated in text

• local area-level geographic resolution

When: Santa Cruz Formation, Santacrucian (17.5 - 16.3 Ma)

• Fernández et al. 2019: Ameghino (1900–1902) highlighted Pa. palmidens as one of the exclusive species of his ‘Notohippidian stage,’ which is currently regarded as representing a chronologically early local fauna of the Santacrucian SALMA (Marshall and Pascual, 1977; Marshall et al., 1983; Cuitiño et al., 2016). There are no precise stratigraphic data for the holotype of Pa. palmidens. Therefore, it is not possible to know confidently whether it was collected from above or below the tuff dated to 17.36 Ma by Cuitiño et al. (2016) in Río Bote.

•Kay & Perry 2019: Collected from SCF at Río Bote above tuff RSC-27, dated at 17.36 Ma (Cuitiño et al., 2016).

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• "At the Rio Bote locality, we measured 125 m of gray to greenish siltstone, sandstone and tuff beds, with minor proportion of conglomerates in lenticular beds."

Size class: mesofossils

Collected by C. Ameghino

• Hernández del Pino 2019: Specimen MPM-PV 18806 was collected in situ in the lower 25 m of the Santa Cruz Formation at the Río Bote section. The specimen MPM-PV 18807 was collected from float at the base of the same section. The final repository for the studied material is the vertebrate paleontology collection of the MPM, in Río Gallegos City, Santa Cruz Province, Argentina. The specimens analyzed are detailed in Systematic Paleontology.

Primary reference: J. C. Fernicola, J. I. Cuitiño, S. F. Vizcaíno, M. S. Bargo, and R. F. Kay. 2014. Fossil localities of the Santa Cruz Formation (Early Miocene, Patagonia, Argentina) prospected by Carlos Ameghino in 1887 revisited and the location of the Notohippidian. Journal of South American Earth Sciences 52:94-107 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 176624: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 18.02.2016, edited by Grace Varnham, Miranta Kouvari and Kateryn Pino

Creative Commons license: CC BY (attribution)

Taxonomic list

 Megatherioidea -
Schismotherium fractum n. sp.6 Ameghino 1887 edentate
Type - it's lost. From the authors it's estimated it came from this locality
 Cingulata - Chlamyphoridae
Proeutatus sp. Ameghino 1891 edentate
 Notoungulata - Interatheriidae
Protypotherium praerutilum3 Ameghino 1887 notoungulate
Patriarchus palmidens n. sp.1 Ameghino 1889 notoungulate
MACN-A 9651a (type)
 Notoungulata - Toxodontidae
Adinotherium sp. Ameghino 1887 notoungulate
 Notoungulata -
Notohippus sp. Ameghino 1891 notoungulate
Notohippus toxodontoides4 Ameghino 1890 notoungulate
MPM-PV 18806 and MPM-PV 18807
 Rodentia - Neoepiblemidae
Perimys sp. Ameghino 1887 caviomorph
 Primates - Homunculidae
Homunculus spp.5 Ameghino 1891 monkey
MPM-PV 17452
Neoicochilus undulatus
Neoicochilus undulatus2 Fernández et al. 2021
Holotype: MACN-A 373