Navegando por Assunto "Megafauna"

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Texto publicado em revista
ANÁLISE DE CAVIDADES NATURAIS PRESENTES NO OESTE DE SANTA CATARINA: UM ESTUDO DE CASO NO MUNICÍPIO DE LINDÓIA DO SUL
(2020) Budke, Alexandre; Leite de Lima, Gisele; Carbonera, Mirian
Este trabalho investigou três cavidades naturais em Lindóia do Sul, Santa Catarina, com o objetivo de analisar a estrutura interna dessas cavidades, buscando compreender sua gênese de formação, medir seus túneis e produzir a planta baixa e o perfil dos segmentos das cavidades. Para a coleta dos dados relevantes, procedeu-se ao trabalho de campo na localização de cada cavidade natural. Sobre a metodologia, foi realizada uma rotina de procedimentos associados à coleta de dados, considerando uma ficha de caracterização de cavidades naturais relacionadas à localização das cavidades e suas características, bem como utilizados materiais específicos para a realização das medições dos túneis para a confecção das plantas e perfis. Três cavidades com características diferentes entre si foram encontradas em Lindóia do Sul, uma delas considerada paleotoca e as outras duas originadas por processos erosivos.
Artigo
GEOGRAPHICAL DISTRIBUTION OF EREMOTHERIUM (XENARTHRA, MEGATHERIIDAE) RECORDS IN MIDWEST BRAZIL
(2020) André Oliveira, Marlon; de Lima da Costa, Vanessa; Lopes de França Ferreira, Stephany; Silva Mendes, Millena; Souza Kuhn, Caiubi Emanuel; Oliveira Paulo, Pedro; de Oliveira Porpino, Kleberson; A. Candeiro, Carlos Roberto
The aim of this article was to present the current fossil record and geographical distribution of Eremotherium in midwest Brazil. The methodology employed here included a bibliographic survey and mapping of specimens. On the last years, new information has been revealed on these ground sloths mainly due to new fossil discoveries in the western region of Goiás and Mato Grosso states. The temporal distribution shows that these records range from the Pliocene to Holocene. This taxon is an important representative of the Brazilian megafauna, and despite its wide Pan-American distribution during the Pliocene-Holocene, there are few known Eremotherium records from this large geographic region of Brazil.
Texto publicado em jornal
Isotopic paleoecology (δ13C) from mammals from IUIU/BA and paleoenvironmental reconstruction (δ13C, δ18O) for the Brazilian intertropical region through the late Pleistocene
(2020-08-15) Dantas, Mário André Trindade; Missagia, Rafaela Velloso; Dutra, Rodrigo Parisi; Raugust, Tiago; Silva, Leandro Antônio da; Delicio, Maria Paula; Renó, Rodolfo; Cherkinsky, Alexander
Stable isotopes of carbon and oxygen of fossil specimens are widely used for paleoecological and paleoenvironmental inferences, and there has been an effort to better understand the isotopic paleoecology and chronology of herbivores that inhabited the Brazilian Intertropical Region during the late Quaternary. In the present work, new radiocarbon datings and carbon and oxygen isotopes data for Eremotherium laurillardi, Notiomastodon platensis, Tapirus terrestris, Tayassu pecari, and Mazama gouazoubira are presented, from specimens that lived on Iuiu county (Toca Fria and Jatobá caves), state of Bahia, in the Brazilian Intertropical Region. E. laurillardi was dated as of ∼32 ka BP, representing the oldest direct dating for this species in the Brazilian Intertropical Region, while N. platensis was dated as of ∼25 ka BP. Fossils of the extant species T. pecari, M. gouazoubira, and T. terrestris presented radiocarbon ages of ∼23 ka BP, ∼21 ka BP, and ∼15 ka BP, respectively, showing that some of these species lived in Iuiu during the Last Glacial Maximum. According to our analyses, T. terrestris was the only specialist (δ13C = −11.0‰; piC3 = 0.76; BA = 0.49), whereas the remaining taxa were generalists mixed-feeders (δ13C = −1.3 to −10.0‰; piC3 = 0.24 to 0.69; BA > 0.58). The paleoenvironment reconstruction in Iuiu and other localities in BIR, during ∼32 ka BP to ∼15 ka BP, allow us to suggest that the dry arboreal to open Savanna habitats (rich in grass and shrubs) were the most common environment.
Artigo
Representatives of the order Pilosa and Cingulata, Furna do Cazuza (Pleistocene-Holocene), Paripiranga, Bahia, Northeastern Brazil
(2024-07) Nascimento, Johnson Sarmento de Oliveira; Silva, Jorge Luiz Lopes da; Sucerquia, Paula
Located in the Northeast of Brazil, the city of Paripiranga, State of Bahia, is situated in a karst region called Supergrupo Canudos. The locality boasts a high number of natural cavities, some of which contain Pleistocene mammal fossils and remains of contemporary vertebrates. The cave locally known as Furna do Cazuza is a deep natural cavity in Proterozoic limestone, with a vertical entrance of 16 m in depth, resembling an abyss, serving as natural traps for many animals, especially mammals. The cave has a large area at its entrance, with a significant influx of sediment and a considerable quantity of bones, some of which have already been collected. The collected bone material (appendicular and part of a skull) belongs to three individuals: an armadillo and two giant ground sloths. The osteoderms were attributed to the Pampatheriidae Holmesina sp., and the most abundant bone material to the Megatheriidae Eremotherium laurillardi and the Scelidotheriidae Catonyx cuvieri. This study presents the largest number of bones of C. cuvieri attributed to a single individual in a cave. As paleontological research advances, the understanding of the diversity of the past fauna during the Pleistocene in the municipality of Paripiranga and the surrounding region continues to expand. The caves are still under study, and their fossiliferous richness has not been fully measured and identified.