Bajada del Agrio (Cretaceous to of Argentina)

Where: Neuquén, Argentina (38.4° S, 70.0° W: paleocoordinates 38.4° S, 35.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Huitrin or Rayoso Formation (Bajada del Agrio Group), Late/Upper Barremian to Late/Upper Barremian (130.0 - 122.5 Ma)

• PJW: Was Huitrin-Rayoso group.

Environment/lithology: terrestrial; lithified, gray, blue, argillaceous mudstone

Size class: microfossils

• Others = Palynomorphs

Preservation: soft parts, original sporopollenin

Collected by Laboratorio de Bioestratigrafía de la Universidad Nacional de la Patagonia San Juan Bosco

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

• Laboratorio de Bioestratigrafía de la Universidad Nacional de la Patagonia San Juan Bosco: Repository.

Primary reference: P. Vallati. 2006. Las primeras angiospermas en el Cretácico de la Cuenca Neuquina (Centro Oeste de Argentina): Aspectos geológicos relacionados. Revista Brasileira de Paleontologia 9(1):83-92 [C. Jaramillo/P. Santamarina]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 149818: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 27.08.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Eukaryota -
? Membranosphaera "sp." Samoilovitch 1961 acritarchs
Equisetopsida
 Pinidae - Pinidae
Cyclusphaera psilata Volkheimer and Sepulveda 1976
Asteropollis
  -
Asteropollis transitorius Vallati 2006
nov. comb.
Asteropollis asteroides
  -
Asteropollis asteroides Hedlund and Norris 1968
Gymnospermopsida
  -
Singhia montanaensis Lima 1980
Subzone of Klukisporites foveolatus
Gnetaceaepollenites
  -
Gnetaceaepollenites "sp." Thiergart 1938
Subzone of Klukisporites foveolatus
Gnetaceaepollenites barghoornii Lima 1980
Subzone of Klukisporites foveolatus
Pilosisporites trichopapillosus
  -
Pilosisporites trichopapillosus Delcourt and Sprumont 1955
Polypodiopsida
 Schizaeales - Polypodiidae
Klukisporites foveolatus Pocock 1965
Subzone of Klukisporites foveolatus
Appendicisporites tricornitatus Weyland and Greifeld 1953
  - Blechnaceae
Ginkgoopsida
 Ephedrales -
Equisetosporites cf. albertensis Singh 1964
Subzone of Klukisporites foveolatus
Angiospermae
  -
 Mesangiosperms - Liliaceae
 Chloranthales - Chloranthaceae
  -
Afropollis zonatus Doyle et al. 1982
Zone of Afropollis zonatus
Afropollis operculatus Doyle et al. 1982
Zone of Afropollis zonatus
Afropollis aff. jardinus Doyle et al. 1982
Zone of Afropollis zonatus
Marchantiopsida
  - Marchantiidae
Triporoletes reticulatus Playford 1971
Subzone of Klukisporites foveolatus