Navegando por Assunto "Biogeografia histórica"

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Acesso aberto (Open Access)
Considerações filogenéticas e biogeografia histórica dos malacostráceos (decápodes e isópodes) cenozóicos do Brasil
(2010-03) TÁVORA, Vladimir de Araújo; PAIXÃO, Gleicy Mara Carvalho; SILVA, Fabrício Araújo da
This work deals the analysis of the Historical Biogeography of the brazilian cenozoic paleocarcinofauna, recorded in the Maria Farinha, Tremembé and Pirabas formations. This taxa has affinity with the tethian carcinofaunas and modern aspect. The paleobiogeographic setting allows to situate their biological events of the origin, dispersional and irradiation trends in the tethian, south high latitude and amphitropical origins. The majority of the brazilian carcinofauna has affinity with the tethian faune, that migrate in two seaways, west and east. The phylogenetic relationships suggest appearence of the Thalassinoidea group from the Caridea infraordo. The Retroplumidae family (genus Costacopluma) recorded at Maria Farinha Formation is directed related with the cenozoic ocypodid (i.e. genus Uca at Pirabas Formation, living in the same ecological niches and environmental tolerances. Also, the morphological similarities between Xanthoidea and Portunoidea in the Paleocene, suggest monophyletic relationships with Goneplacidae and Hexapodidae. The detailed phylogenetic studies in Goneplacidae family reveals that Glyphithyreus genus is related with Eucratopsinae subfamily.
Acesso aberto (Open Access)
Eventos biológicos da Formação Pirabas (Mioceno Inferior)
(2010-06) TÁVORA, Vladimir de Araújo; SANTOS, André Augusto Rodrigues dos; NOGUEIRA NETO, Ignácio de Loiola Alvares
This work deals the recognition of the global, regional and local biologic events in the Pirabas Formation based on the modern concepts of the analysis and the geobiological evolution of sedimentary basins integrating the crustal geologic processes of the Neogene with the phylogenetic and adaptative responses of the marine organisms. Were recognized global bioevents of innovation and radiation in the mollusks and sirenids, regional bioevents of the radiation, and geographical spreading in mollusks, decapod crustaceans, echinoids, scleractinian corals, bryozoans, ostracods and foraminifera. Also is characterized local bioevents of the geographical spreading in the plants, stenobiontic community and ecophenotypics changes in taxa also did lived in Caribbean biogeographic province.