Mírian Liza Alves Forancelli Pacheco

• 4th International Palaeontological Congress, AR.EXT

• Abstract

  Mesosauridae is one of the most antient amniote families secondarily adapted to the aquatic life mode that inhabited the Gondwana supercontinent during the Permian. Their remains are found in correlated strata from Africa and in the South American that, in Brazil, correspond to the Irati Formation. The genus Mesosaurus is mainly found in dark shales, which characterizes deep, poorly oxyge…

  Fossildiagenetic characterization of mesosaurid bones (Parareptilia, Mesosauridae): paleoecologic and paleoenvironmental implications, BP.IC

• Abstract

  Geological changes, such as tectonic reconfigurations and large glaciations, marked profound changes in the evolution of the biosphere at the Ediacaran/Cambrian boundary (ca. 541 Ma.). Ecological feedback may have contributed to the origin of animals capable of synthesizing hard skeletons or actively exploiting the substrate, which has resulted in biological diversification and radiation.…

  Geobiological and palaeoenvironmental aspects of Corumbella werneri Hahn et al. (1982) and related biota (Ediacaran, Corumbá group), BP.DR

• Abstract

  The mineralogical characteristics of tegument can influence differential preservation processes among organisms (e.g. dissolution and concretization). In this context, stand out the chitin-phosphatic shells of orbiculoid brachiopods, fossil group that also composed the Malvinokaffric Relm. These fossils are usually preserved in phosphatic concretions in Devonian sediments of the Paraná Ba…

  Diagenetic aspects of Orbiculoidea in phosphatic concretions (Devonian, unit 2, Chapada group, MS): taphonomic and paleoenvironmental implications, BP.IC

(Only some records are available in English at this moment)

• Abstract

  Biomineralization among metazoans is one of the most successful events of the Phanerozoic. However, its roots are even older. Animals with mineralized skeletons appeared around 551 Ma, in the Ediacaran-Cambrian transition. The drivers of biomineralization, as well as its impacts on ecology, environment, and biogeochemical cycles have been a matter of debate for the last decades. Despite i…

  Testing biomineralization in Corumbella werneri Hahn et al. (1982) and comparison with sinotubulites: geobiological perspectives of the earliest mineralized skeletal biotas, BE.EP.DR

• Abstract

  Exceptional preservation is a rare process in the fossil record. Even less common is the preservation of soft parts. Nevertheless, reports of highly preserved soft tissues associated with aluminosilicates are increasing. Despite the expanding interest in this topic, there is a lack of knowledge and comprehension about the mechanisms behind clay mineralization of fossils. In fact, the impo…

  The rise of complex ecosystems: unraveling and comparing aspects of exceptional preservation between Itajaí (Ediacaran, Brazil) and Francevillian (Paleoproterozoic, Gabon) paleobiotas, BE.EP.DR