NF Basal, Anfiteatro de Tico, Santa Cruz Province, Argentina: Late/Upper Barremian - Early/Lower Aptian, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cabochonicus carbunculus megaspore
Archangelsky and Villar de Seoane 1991
Verrutriletes tomtaylori megaspore
Archangelsky and Villar de Seoane 1990
n. sp. in paper, but specific sample of origin not identified
Erlansonisporites sparassis megaspore Potonié 1956
Bacutriletes informal sp. A megaspore Van der Hammen 1955
Bacutriletes informal sp. indet. megaspore Van der Hammen 1955
high variation, may be >1 taxon
Bacutriletes triangulatus n. sp. megaspore Taylor and Taylor 1988
Bacutriletes guttula megaspore Archangelsky and Villar de Seoane 1991
Archangelsky and Villar de Seoane 1991
Hughesisporites rugulatus megaspore
Archangelsky and Villar de Seoane 1991
Hughesisporites patagonicus megaspore Taylor and Taylor 1988
Horstisporites iridodea n. sp. megaspore
Auriculozonospora spongiosa n. sp. megaspore
Archangelsky and Villar de Seoane 1990
Lycopodiopsida - Isoetales
Minerisporites laceratus n. sp. megaspore Archangelsky and Villar de Seoane 1990
Archangelsky and Villar de Seoane 1990
see common names

Geography
Country:Argentina State/province:Santa Cruz
Coordinates: 48.5° South, 69.3° West (view map)
Paleocoordinates:48.5° South, 33.2° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Barremian
Key time interval:Late/Upper Barremian - Early/Lower Aptian
Age range of interval:125.77000 - 119.50000 m.y. ago
Stratigraphy
Formation:Baquero
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: "volcaniclastic"
Lithology description: "light brown volcaniclastic sediments" in Taylor and Taylor (1988) "tobas organogenas" in Archangelsky and Villar de Seoane (1991)
Taphonomy
Modes of preservation:body,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection methods:chemical
Reason for describing collection:taxonomic analysis
Collection method comments: Locality described as "from the Tico Amphitheater, Santa Cruz Province, Argentina" and "The microfossils occur near the base of the formation, in the lowermost of several fossiliferous zones (p.73)." This locality is likely equivalent to "NF basal" of Archangelsky and Villar de Seoane (1990) and following the rules, is so entered with Taylor and Taylor (1988) as the primary reference, even if it is less specific than the later. For Archangelsky and Villar de Seoane (1991), they state "Las megasporas fueron recuperadas de tobas organogenas presentes en la base de la Formacion Baquerro, en la localidad Fnfiteatro de Tico, muy cerca del nivel fosilifero Ticoa harrisii (Archangelsky, 1967, Mapa 2, punto fosilifero 1)" (p.353). Since it is definitely NOT from NF Ticoa harrisii, I placed these fossils in NF Basal as well.
Metadata
Database number:43734
Authorizer:R. Lupia Enterer:R. Lupia
Modifier:R. Lupia Research group:paleobotany
Created:2004-08-24 19:26:36 Last modified:2004-09-03 15:32:34
Access level:the public Released:2004-08-24 19:26:36
Creative Commons license:CC BY
Reference information

Primary reference:
11537. W. A. Taylor and T. N. Taylor. 1988. Ultrastructural analysis of selected Cretaceous megaspores from Argentina. Journal of Micropalaeontology 7(1):73-87 [R. Lupia/R. Lupia/R. Lupia]

Secondary references:

11535 S. Archangelsky and L. Villar de Seoane. 1990. Morfologia y estructura de megasporas Cretacicas de Patagonia, Republica Argentina. Revista Espanola de Micropaleontologia 22(3):419-450 [R. Lupia/R. Lupia/R. Lupia]
11602 S. Archangelsky and L. Villar de Seoane. 1991. Notas sobre la flora fosil de la zona de Tico, Provincia de Santa Cruz. XI. Morfologia y estructura de tres megasporas. Ameghiniana 28(3-4):353-364 [R. Lupia/R. Lupia/R. Lupia]