Perfil de Rebasa (1982) in Baldoni (1987)-composite/sample indet. (Cretaceous to of Argentina)

Where: Santa Cruz, Argentina (49.2° S, 72.1° W: paleocoordinates 51.4° S, 39.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Kachaike Formation, Late/Upper Aptian to Late/Upper Aptian (122.5 - 109.0 Ma)

• Reported as "una antiguedad Cretacico inferior (Aptiano-Albiano) o mas precisamente Aptiano superior-Albiano inferior (p. 676)" based on pollen and spores and megaspores."fangolita" probably translated loosely as mudstone [fango = mud], but entered as "shale" to be conservative

• formation-level stratigraphic resolution

Environment/lithology: shale

• "Las evidencias litologicas y paleontologicas han manifestado un ambiente continental, la presencia de restos algales como Dictythylakos y Botryococcus acompanadas de megasporas con fuertes engrosamientos ecuatoriales y apendices diversos, la abundancia de granos de polen y esporas y grandes restos to cuticula indicarian posibles cuerpos de agua de poca profundidad con 'dos breves episodios marinos' debido (Gamerro 1982), a la escasa presencia de dinoflagelados en dos de las muestras estudiadas (p. 675)."?Continental environment with occasional shallow bodies of water and two marine incursions. However, she mentions dinoflagellates in two studied samples but does not say which so environment is uncertain.
• "fangolita" probably translated loosely as mudstone [fango = mud], but entered as "shale" to be conservative

Size class: microfossils

Preservation: original sporopollenin

Collection methods: surface (in situ), chemical, sieve,

Primary reference: A. M. Baldoni. 1987. Dos nuevas especies de megasporas de la Formacion Kachaike, Cretacico Inferior de Santa Cruz, Argentina. Anais do X Congreso Brasileiro de Paleontologia, Sociedade Brasileira de Paleontologia 2:669-689 [R. Lupia/R. Lupia/R. Lupia]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32199: authorized by Rick Lupia, entered by Rick Lupia on 10.06.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• This is the 'superset' collection for taxa reported from samples at this locality, but not specified as to exact sample; list does not contain taxa known from one or more specific samples. Baldoni and Batten (1991) described, in more detail, some, but not all, of the megaspores previously only referred to by generic names in Baldoni (1987).
Show authors, comments, and common names
unclassified
  -
Schizaceae indet.
Schizaceae indet.
misspelling in Baldoni (1987)
Equisetopsida
 Pinidae - Pinidae
Balmeisporites holodictyus
Balmeisporites holodictyus Cookson and Dettmann 1958
misspelling in Baldoni (1987)
Algae
  - Botryococcaceae
Botryococcus sp.
Botryococcus sp. Kutzing 1849
alga
Bacutriletes
  -
Bacutriletes triangulatus
Bacutriletes triangulatus Taylor and Taylor 1988
Dictyothylakos
  -
Dictyothylakos sp.
Dictyothylakos sp. Horst 1954
probable alga
Lycopodiopsida
 Isoetales -
Minerisporites sp., Minerisporites cf. marginatus
Minerisporites sp. Potonie 1956 clubmoss
Minerisporites cf. marginatus Potonie 1956 clubmoss
 Selaginellales - Selaginellaceae
Selaginellaceae indet.
Selaginellaceae indet. Willkomm 1854 spikemoss
Polypodiopsida
  - Dicksoniaceae
Dicksoniaceae indet.
  - Osmundaceae
Baculatisporites sp.
Baculatisporites sp. Thomson and Pflug 1953
  - Gleicheniaceae
Gleicheniaceae indet.
 Cyatheales - Polypodiidae
Cyatheaceae indet.
Cyatheaceae indet. Kaulfuss 1827 scaly tree fern
Pteridopsida
 Marsileales -
Arcellites disciformis
Tenellisporites
  -
Tenellisporites coronatus n. sp.
Tenellisporites coronatus n. sp. Baldoni and Batten 1991