Fotogrametria de um icnofóssil escavado por preguiças-gigantes (Megaichnus major)
DOI:
https://doi.org/10.4072/rbp.2022.3.04Abstract
Photogrammetry of an excavated ichnofossil by giant sloths (Megaichnus major). During the Pliocene and Pleistocene, the extinct giant mammals that lived in South America had the burrowing behavior that, in the search for shelter and refuge, produced large ichnofossils called Megaichnus (paleoburrows). Megaichnus are biogenic structures in the form of tunnels and halls excavated by Folivora (Megaichnus major) and Cingulata (Megaichnus minor). On the ceiling and walls of these paleoburrows, it is possible to observe traces of excavation of these animals. Photogrammetry was performed by imaging M. major to generate the Three-Dimensional Digital Model (3DM). The paleoburrow is located in the Municipality of Doutor Pedrinho (Santa Catarina State) and was excavated in the sandstone of the Taciba Formation (Permian). The photographs were processed to generate the 3DM and the virtual reality interface with 3D glasses. The 3DMs are available for viewing on the Sketchfab website through the links (GoPro 4; https://skfb.ly/6RYyn) and (Nikon D60; https://skfb.ly/ooprJ). 3DM allows easy access to the ichnofossils, making it possible to study them remotely from anywhere in the world. The construction of 3DMs of the paleoburrows, through high-resolution photogrammetry, is an innovative proposal, and allows wide dissemination of knowledge about these structures.
Keywords: paleoburrows, Quaternary, megafauna, 3D imaging.
RESUMO – Durante o Plioceno e Pleistoceno, mamíferos gigantes extintos que viveram na América do Sul tinham o comportamento escavador que, em busca de abrigo e refúgio, formaram grandes icnofósseis denominados Megaichnus (paleotocas). Megaichnus são estruturas biogênicas na forma de túneis e salões escavados por Folivora (Megaichnus major) e Cingulata (Megaichnus minor). No teto e nas paredes destas paleotocas é possível observar traços de escavação destes animais. No presente estudo foi realizada a fotogrametria através do imageamento de M. major para gerar o Modelo Digital Tridimensional (M3D). A paleotoca está localizada no Município de Doutor Pedrinho (Estado de Santa Catarina) e foi escavada no arenito da Formação Taciba (Permiano). As fotografias foram processadas para geração do M3D e da interface com a realidade virtual com óculos 3D. Os M3D estão disponíveis para visualização no site Sketchfab por meio dos links (GoPro 4; https://skfb.ly/6RYyn) e (Nikon D60; https://skfb.ly/ooprJ). O M3D permitiu o fácil acesso aos icnofósseis, tornando possível seu estudo remoto de qualquer lugar do mundo. A construção de M3Ds das paleotocas, por meio da fotogrametria de alta resolução, além de ser uma proposta inovadora, permitiu ampla divulgação do conhecimento sobre estas estruturas.
Palavras-chave: paleotocas, Quaternário, megafauna, imageamento 3D.
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