Bajo ComisiĆ³n - Kachaike Formation (Cretaceous to of Argentina)

Where: Chubut, Argentina (48.9° S, 72.2° W: paleocoordinates 55.5° S, 46.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kachaike Formation, Albian to Albian (113.0 - 93.9 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy sandstone and lithified, conglomeratic conglomerate

• The Kachaike Formation was deposited during the development of one cycle (the Kachaike-Piedra Clavada Regressive Subcycle of Arbe, 2002).

Size class: microfossils

Preservation: soft parts, original sporopollenin

Collection methods: quarrying, chemical, mechanical

Primary reference: M. G. Passalia. 2007. A mid-Cretaceous flora from the Kachaike Formation, Patagonia, Argentina. Cretaceous Research 28:830-840 [C. Jaramillo/P. Santamarina]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 150880: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 17.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Bennettitales -
Cycadolepis "sp." Saporta 1875
Ptilophyllum acutifolium Bose and Kasat 1972
 Peltaspermales - Umkomasiaceae
Pachypteris crassa Townrow 1965
Pachypteris auriculata Passalia 2007
 Pinales -
Brachyphyllum "sp." Brongniart 1828
 Pinales - Taxodiaceae
Athrotaxis ungeri Florin 1940
 Ginkgoales -
 Osmundales - Osmundaceae
Phyllopteroides cf. laevis Cantrill and Webb 1987
 Schizaeales - Schizaeaceae
 Gleicheniales - Matoniaceae
Nathorstia alata Halle 1913
 Polypodiales -
Muscites "sp." Brongniart 1828
Magnoliopsida "morphotype a" Cronquist et al. 1996
Magnoliopsida "morphotype b" Cronquist et al. 1996
Thorhallenia dentata Passalia 2007
  - Sphenopteridae
Sphenopteris "sp." Sternberg 1825
Aculea bifida
Aculea bifida Douglas 1973