Karaiken (Miocene of Argentina)

Also known as "Notohipidense" horizon of Ameghino

Where: Santa Cruz, Argentina (50.1° S, 71.8° W: paleocoordinates 50.8° S, 66.2° W)

• coordinate stated in text

• local area-level geographic resolution

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

• Type locality of Ameghino's "Notohippidense" stage.

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by C. Ameghino

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: paleoecologic analysis

PaleoDB collection 176596: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 17.02.2016, edited by Kateryn Pino and Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Paucituberculata - Palaeothentidae
Parabderites sp.4 Ameghino 1902 marsupial
 Sparassodonta - Borhyaenidae
Borhyaena tuberata6 Ameghino 1887 metatherian
MACN-A 2076–2078
 Sparassodonta -
"Proviverra trouessarti n. sp." = Cladosictis patagonica5
"Proviverra trouessarti n. sp." = Cladosictis patagonica5 Ameghino 1887 metatherian
MACN 2079, partial skull, holotype; MACN 2080, dentary, cotype and probably same individual
 Cingulata - Dasypodidae
Vetelia puncta n. sp.3 Ameghino 1891 armadillo
Holotype: MACN A 2139
 Rodentia -
Acarechimys minutus2 Patterson and Pascual 1967 caviomorph
MACN-PV SC4098
 Rodentia - Acaremyidae
"Acaremys murinus" = Acaremys murinus1, "Acaremys karaikensis n. sp." = Acaremys murinus1
"Acaremys murinus" = Acaremys murinus1 Ameghino 1887 caviomorph
MACN PV SC4099
"Acaremys karaikensis n. sp." = Acaremys murinus1 Ameghino 1887 caviomorph
MACN A 1885, poorly preserved skull