Miocene fern spores and pollen grains from the Solimões Basin, Amazon Region, Brazil

Abstract

ABSTRACTis work documents fern spores and pollen grains (miospores) recovered from rocks of the Solimões Formation (Solimões Basin), their botanical a nities, ecology and distribution in the Miocene of the Amazon Region. e assemblage of miospores is well preserved and diverse. ey are identi ed, illustrated and assigned to the ten families of ferns and 22 families of spermatophytes. All miospores were identi ed to the taxonomic level of species except for two taxa (Perinomonoletes and Podocarpidites). e families Pteridaceae and Arecaceae were most representative of ferns and spermatophytes, respectively. is work contributes to the knowledge of the paleo ora and will aid in paleoenvironmental, paleoecological and biostratigraphic interpretations of the Miocene of the Amazon Region.

Occurrence of Cyclusphaera scabrata in Achiri (late middle-early late Miocene?, Bolivian Altiplano): Paleogeographical implication

“…In the Neotropics, Parra et al (2020) described the palynology from a Neogene sequence in the Marañon Basin, north of Peru and mentioned the presence of C. scabrata in Zone Mar-B, corresponding to the Burdigalian stage (17.71-16.1 Ma). Sá andCarvalho (2017) andD'Apolito et al (2021) recorded the same fossil-taxon in Miocene deposits of the Solimões Fm. in the Solimões Basin (western Brazilian Amazonia), as well as Hoorn et al (2017) in the middle-late Miocene interval of Well 2 of Foz do Amazonas Basin (offshore Pará, Brazil).…”

Multi-proxy evidence of Caribbean-sourced marine incursions in the Neogene of Western Amazonia, Brazil

“…Despite paleontological, ichnological, and geochemical evidence for early and middle Miocene marine flooding events in the Western Amazonia (Gingras et al, 2002;Hovikoski et al, 2010;Antoine et al, 2016), relatively little is known on late Miocene incursions (e.g., Räsänen et al, 1995;Linhares et al, 2017;Sá and Carvalho, 2017). The Pliocene marine record here (1AS-105-AM) included the occurrence of cysts dinoflagellate, Foraminiferal lining, scolecodonts, and rare planktonic foraminifera (Globigerinoides sp.).…”

“…Rich and well-preserved fossil record of the Solimões Formation includes plant fossils, pollen grains and spores (Hoorn, 1994a,c;Silva-Caminha et al, 2010;Kachniasz and Silva-Caminha, 2016;Sá and Carvalho, 2017;Jaramillo et al, 2017;Leandro et al, 2019), ostracods (Purper, 1977(Purper, , 1979Ramos, 2006;Gross et al, 2011Gross et al, , 2013Gross et al, , 2014Gross et al, , 2015Linhares et al, 2011;, fish scales and fragments, bird fragments, and reptile and mammal teeth and bones (Santos et al, 1991;Monsch, 1998). Microfossil-based studies assigns Neogene age (Miocene-Pliocene: 23-2.6 Ma) to the Solimões Formation.…”

Georeferencing fossiliferous localities from Solimões and Acre Basins (Brazil) - what we know so far about Solimões Formation and future perspectives

“…Besides that, the paleontological research carried out by different groups of researchers has been advancing in the region of Acre, such as the "Prof. Rosalie Benchimol" expedition developed by UFAC and Museu da Amazônia in recent years and reported by Loboda et al (2019b); notwithstanding, FFCLRP/USP's paleontological expeditions have been carried out since 2012 (lead by A. Hsiou), or the recent communications and contributions of researchers in the field (e.g. Hsiou et al 2016, Silveira & Souza 2016, 2018, Kerber et al 2016a,b, 2018, Kloster et al 2017, Sá & Carvalho 2017, Sá et al 2020, Guimarães et al 2018, Bissaro-Júnior et al 2019, Cidade et al 2019b,c, Loboda et al 2019a,b, Lopes et al 2019, 2020, Guilherme et al 2020, Kern et al 2020.…”