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Neogene vertebrate microremains of the Brazilian Amazon region, with emphasis on the temporal resolution of the Solimões Formation, Miocene of the Acre Basin

Grant number: 19/14153-0
Support Opportunities:Regular Research Grants
Duration: January 01, 2021 - June 30, 2023
Field of knowledge:Biological Sciences - Zoology - Paleozoology
Principal Investigator:Annie Schmaltz Hsiou
Grantee:Annie Schmaltz Hsiou
Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated researchers: Ana Maria Ribeiro ; Edson Guilherme da Silva ; Elizete Celestino Holanda ; Elver Luiz Mayer ; Francisco Ricardo Negri ; Leonardo Rodrigo Kerber Tumeleiro ; Marcos César Bissaro Júnior ; Mariela Cordeiro de Castro ; Martin Bernard Roddaz ; Max Cardoso Langer ; Pierre-Olivier Antoine ; Rafael Gomes de Souza ; Thiago Silva Loboda


The Cenozoic vertebrate fossil record in Brazil is extremely rich and diversified. Most of the fossils of the early Cenozoic are specifically concentrated in the Paleogene deposits located in the northeast as well as in the southeast parts of the country. On the other hand, deposits of Neogene Age are particularly concentrated in the southwest of the Brazilian Amazon region, mainly represented at the Acre Basin (Miocene of the Solimões Formation). A large part of the Cenozoic tetrapod fossils is almost exclusively composed of medium to large sized animals, such as mammals, crocodilians and turtles, and various specimens of scientific relevance are stored in several national and overseas research institutions. The main goal of this project is the prospecting of several Neogene outcrops in the Brazilian Amazon region in search of vertebrate microremains, as well as the development of anatomical and systematic studies of the Brazilian Neogene key taxa. The investigative work will be focused on the phylogenetic relations and evolution of collected taxonomic groups, such as small mammals, amphibians, lizards and snakes, as well as the biostratigraphic/temporal and paleoenvironmental implications with other South American Neogene deposits. While keeping the investigation focus on tetrapods, this project also aims, in more general terms, at improving the stratigraphic correlations of the Neogene deposits in the Acre Basins as well as the correlations with those from other parts of the northern countries of South America (e.g. Peru and Venezuela), using relative (SALMAs - South American Mammal Ages) and absolute dating (detrital zircon) analyses. In addition to that, this project will lead to a more detailed stratigraphic resolution of the Acre Basin, along with recent geological data related to the Neogene Amazon region. It is important to point out that this type of geochronological framework at the Acre Basin has still been insufficiently studied. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PAIVA, ANA LAURA S.; GODOY, PEDRO L.; SOUZA, RAY B. B.; KLEIN, WILFRIED; HSIOU, ANNIE S.. Body size estimation of Caimaninae specimens from the Miocene of South America. Journal of South American Earth Sciences, v. 118, p. 11-pg., . (19/14153-0)
ROESE-MIRON, LIVIA; JONES, MARC EMYR HUW; FERREIRA, JOSE DARIVAL; HSIOU, ANNIE SCHMALTZ. Virtual endocasts of Clevosaurus brasiliensis and the tuatara: Rhynchocephalian neuroanatomy and the oldest endocranial record for Lepidosauria. Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology, v. N/A, p. 24-pg., . (20/06819-5, 19/14153-0)
GUILHERME, EDSON; D'APOLITO, CARLOS; MUNIZ, FELLIPE; LOMBA, SILVIA OLIVEIRA; ALDRIN, LEONARDO; HSIOU, ANNIE SCHMALTZ. New fossil anhingids from the upper Acre River (Late Miocene of southwestern Amazon). Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology, v. N/A, p. 18-pg., . (19/14153-0)
MARIVAUX, LAURENT; NEGRI, FRANCISCO R.; ANTOINE, PIERRE-OLIVIER; STUTZ, NARLA S.; CONDAMINE, FABIEN L.; KERBER, LEONARDO; PUJOS, FRANCOIS; SANTOS, ROBERTO VENTURA; ALVIM, ANDRE M. V.; HSIOU, ANNIE S.; et al. An eosimiid primate of South Asian affinities in the Paleogene of Western Amazonia and the origin of New World monkeys. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v. 120, n. 28, p. 10-pg., . (11/14080-0, 19/14153-0)
BARCELOS, LUCAS ALMEIDA; DOS SANTOS, RODOLFO OTAVIO. The Lissamphibian Fossil Record of South America. PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS, v. N/A, p. 65-pg., . (20/07997-4, 19/14153-0, 19/24466-5, 17/04849-1)
MUNIZ, FELLIPE P.; BISSARO-JUNIOR, MARCOS CESAR; GUILHERME, EDSON; DE SOUZA-FILHO, JONAS P.; NEGRI, FRANCISCO R.; HSIOU, ANNIE S.. Fossil frogs from the upper Miocene of southwestern Brazilian Amazonia (Solimoes Formation, Acre Basin). JOURNAL OF VERTEBRATE PALEONTOLOGY, v. 41, n. 6, p. 11-pg., . (11/14080-0, 16/08012-6, 19/14153-0, 16/00476-3)

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