PBDB Collection

Rincón del Buque (Miocene of Argentina)

Also known as Media Luna, Wreck Flat of Riggs, Smith's Rock Flat

Where: Santa Cruz, Argentina (50.8° S, 69.2° W: paleocoordinates 51.4° S, 63.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• The assemblage is typical of the Early Miocene Santacrucian South American Land Mammal Age (Patterson and Pascual, 1972).

• formation-level stratigraphic resolution

Environment/lithology: fluvial-deltaic; tuff

• Tw: Reworked ash-fall materials mixed with other sediments and deposited in tide-influence settings with subsequent marine bioturbation, and in fluvial settings with sub-aereal exposure and pedogenetic pedogenetic modification

•

•T: Deposition of ash-fall in sub-aerial primary tuffs and subaqueous fluvial settings and subaqueous fluvial settings

•

•FA11: T facies represent event of ash-fall in sub-aerial and subaqueous settings in floodplain environments. Tw represent unconfined sheet-flood episodes that remobilized pyroclastic materials in floodplain environments. Subsequent pedogenesis

• Tw Very fine- to medium-grained reworked

•T Fine- to medium-grained primary tuffs

•Pyroclastic and volcaniclastic deposits of the floodplain (FA11): Broad sheets ofT and Tw facies with sharp nonerosional basal surfaces, ranging in thickness from 0.5 to 1.4 m and making up to ~13 km in lateral extension interbedded within FA10 deposits. Sporadic paleoedaphic features

Size classes: macrofossils, mesofossils

Primary reference: S. F. Vizcaíno, R. F. Kay, and M. S. Bargo. 2012. Background for a paleoecological study of the Santa Cruz Formation (late Early Miocene) on the Atlantic Coast of Patagonia. In S. F. Vizcaíno, R. F. Kay, M. S. Bargo (eds.), Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation 1-22 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 176571: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 17.02.2016, edited by Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Panameriungulata - Proterotheriidae	"cf. Diadiaphorus sp." = Proterotherium, Tetramerorhinus sp. "cf. Diadiaphorus sp." = Proterotherium Ameghino 1883 placental Tetramerorhinus sp. Ameghino 1894 placental
Panameriungulata - Macraucheniidae	Theosodon sp. Theosodon sp. Ameghino 1887 placental
Rodentia - Acaremyidae	Acaremys sp. Acaremys sp. Ameghino 1887 caviomorph
Rodentia - Octodontidae	Sciamys principalis Sciamys principalis Ameghino 1887 caviomorph
Rodentia -	Spaniomys sp., Spaniomys riparius, Acarechimys minutus, Acarechimys minutissimus Spaniomys sp. Ameghino 1877 caviomorph Spaniomys riparius Ameghino 1887 caviomorph Acarechimys minutus Patterson and Pascual 1967 caviomorph (see also ref 72683) MPM-PV 15089 MPM-PV 15090 MPM-PV 17435 MPM-PV 17440 Acarechimys minutissimus Ameghino 1887 caviomorph (see also ref 72683) MPM-PV 17429 MPM-PV 17441
Rodentia - Eocardiidae	Phanomys sp. Phanomys sp. Ameghino 1887 caviomorph
Rodentia -	"Eocardia" sp., Neoreomys sp. "Eocardia" sp. Ameghino 1887 caviomorph Neoreomys sp. Ameghino 1887 caviomorph
Rodentia - Neoepiblemidae	Perimys sp. Perimys sp. Ameghino 1887 caviomorph
Rodentia - Dinomyidae	cf. Scleromys sp. cf. Scleromys sp. Ameghino 1887 caviomorph
Megatherioidea - Megalonychidae	cf. Hapalops sp. cf. Hapalops sp. Ameghino 1887 edentate
Megatherioidea -	cf. Pelecyodon sp. cf. Pelecyodon sp. Ameghino 1891 edentate
Cingulata - Peltephilidae	Peltephilus sp. Peltephilus sp. Ameghino 1887 edentate
Cingulata - Propalaehoplophoridae	Propalaehoplophoridae indet., Cochlops sp. Propalaehoplophoridae indet. Ameghino 1891 edentate Cochlops sp. Ameghino 1889 edentate
Cingulata - Chlamyphoridae	Prozaedyus sp., Proeutatus sp., Stenotatus sp. Prozaedyus sp. Ameghino 1891 edentate Proeutatus sp. Ameghino 1891 edentate Stenotatus sp. Ameghino 1891 edentate
Astrapotheria - Astrapotheriidae	Astrapotherium sp. Astrapotherium sp. Burmeister 1879 placental
Notoungulata - Hegetotheriidae	Hegetotherium sp. Hegetotherium sp. Ameghino 1887 notoungulate
Notoungulata - Interatheriidae	Interatherium sp., Protypotherium sp. Interatherium sp. Ameghino 1887 notoungulate Protypotherium sp. Ameghino 1882 notoungulate
Notoungulata - Homalodotheriidae	Homalodotherium sp. Homalodotherium sp. Huxley 1870 notoungulate
Notoungulata - Toxodontidae	Adinotherium sp., Nesodon sp. Adinotherium sp. Ameghino 1887 notoungulate Nesodon sp. Owen 1846 notoungulate
Sparassodonta - Hathlyacynidae	"Hathlyacynidae indet." = Hathlyacininae "Hathlyacynidae indet." = Hathlyacininae Ameghino 1894 metatherian
Paucituberculata - Palaeothentidae	Palaeothentes minutus, Palaeothentes lemoinei, Palaeothentes intermedius, Palaeothentes cf. aratae, "Acdestis owenii" = Acdestis oweni, Acdestis lemairei Palaeothentes minutus Ameghino 1887 marsupial Palaeothentes lemoinei Ameghino 1887 marsupial Palaeothentes intermedius Ameghino 1887 marsupial Palaeothentes cf. aratae Moreno 1882 marsupial "Acdestis owenii" = Acdestis oweni Ameghino 1887 marsupial Acdestis lemairei Bown and Fleagle 1993 marsupial
Microbiotheria - Microbiotheriidae	Microbiotherium tehuelchum Microbiotherium tehuelchum Ameghino 1887 marsupial
Aves
Gruiformes - Phorusrhacidae	Phorusrhacos longissimus Phorusrhacos longissimus Ameghino 1887 terror bird