Angiosperm association from the Río Turbio Formation (Eocene–?Oligocene) Santa Cruz, Argentina: revision of Hünicken’s (1955) fossil leaves collection

The Río Turbio Formation (Eocene–?Oligocene) is of particular paleobotanical interest owing to its combination of high fossil plant diversity associated with the coexistence of warm-temperate and cool-temperate components. As the first suite of fossils related to a documented stratigraphic section, Hünicken’s fossil plant collection is one of the most important from the Paleogene of South America. A total of 34 angiosperm species from the collection were reviewed and taxonomically updated, with Nothofagus as the dominant genus. The taxa identified indicate a warm and humid climate with the development of some elements of a cool-temperate climate marked by a transitional climate change to cooler conditions. The comparison of angiosperms from different paleofloras from the southernmost of South America confirms that the assemblage of Río Turbio Formation was similar to that of the Río Pichileufú area, both from Patagonia, Argentina.Fil: Vento, Barbara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Pramparo, Mercedes Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentin

Typification of plant names published by Giovanni Casaretto based on specimens collected in Brazil and Uruguay

International audienceGiovanni Casaretto (1810-1879) was appointed by King Charles Albert of Savoy-Carignano, Kingdom of Sardinia, as the botanist and mineralogist of a planned circumnavigation of the globe. After collecting in a few localities in southern Brazil and Uruguay, Casaretto collected for almost nine months, from April to December 1839, in Rio de Janeiro and its vicinity. While in Rio, he also bought about 100 collections from Riedel and about 500 collections from Clausen, which were made in the states of Rio de Janeiro, Sao Paulo, and Minas Gerais, which he re-numbered and integrated into his collections. He also made significant collections in the state of Bahia, and a few collections in and around Recife (Pernambuco). Based on the preceding collections, Casaretto published a total of 101 names (in 36 plant families, delimited according to APG III), of which, according to the present study, 27 names are currently accepted, 12 serve as basionyms for currently accepted names, 7 are illegitimate due to superfluity, and 55 are heterotypic synonyms of previously published names. All the 101 names of Casaretto are hereby typified, and Eugenia casarettoana Delprete is here proposed as a substitute name for an illegitimate later homonym. In addition, a lectotype and an epitype for Couratari estrellensis Raddi are here designated