Where: Santa Cruz, Argentina (50.4° S, 72.2° W: paleocoordinates 52.3° S, 62.0° W)

• coordinate stated in text

When: La Anita Formation, Maastrichtian (72.1 - 66.0 Ma)

• This locality represents the uppermost facies of the upper unit of the La Anita Formation. CCC-B from a siltstone level

Environment/lithology: fluvial-deltaic; lithified, sandy sandstone and lithified, argillaceous, sandy shale

Size class: microfossils

• The assemblage recovered from sample CCC-B is dominated by gymnosperms (69.2%), followed by ferns (17.9%) and angiosperms (12.8%). The most important groups in this assemblage are: Podocarpaceae (67.6%), represented mainly by the genus Podocarpidites, and Arecaceae (11.5%), represented by Arecipites minutiscabratus. Podocarpidites marwickii, P. rugulosus, Podocarpidites sp., ?Rhoipites sp., Lewalanipollenites sp., Proteacidites spp. and Dichastopollenites sp., are exclusive from this level

Preservation: adpression, soft parts, original sporopollenin

Collection methods: quarrying, chemical, hydrochloric, hydroflouric,

• The specimens are stored at the paleobotanical collection of the Museo Regional Provincial “Padre Jesús Molina”, Rio Gallegos, Santa Cruz Province (acronym MPM-Pb).

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•Samples were processed following standard palynological techniques, and mounted in a glycerol mounting medium. The observations were made under a Leica DM2500 light microscope and the photographs were taken with a Leica DFC295 digital camera. Specimen locations refer to England Finder coordinates. In order to obtain the relative abundance of plant groups, counts of at least 300 individuals were conducted. Broken individuals were not counted, and tetrads and polyads were counted as one individual.

Primary reference: P. E. Santamarina, V. D. Barreda, D. Moyano Paz, C. Tettamanti, A. Iglesias, D. G. Poiré, and A. N. Varela. 2020. Palynoflora from the La Anita Formation (Maastrichtian), Austral-Magallanes Basin, Argentina. Revista del Museo Argentino de Ciencias Naturales 22(1):47-56 [E. Vlachos/F. Aspromonte]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 234761: authorized by Evangelos Vlachos, entered by Franco Aspromonte on 16.05.2024

Creative Commons license: CC BY (attribution)