Late Aptian angiosperm pollen grains from Patagonia: Earliest steps in flowering plant evolution at middle latitudes in southern South America |
| |
| Institution: | 1. Instituto de Botánica Darwinion (ANCEFN – CONICET), Labardén 200, CC22 - B1642HYD - San Isidro, Buenos Aires. Argentina;2. Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina.;3. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Avda. Ángel Gallardo 470, Buenos Aires 1405, Argentina;1. British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK;2. Jackson, WY, USA;3. British Geological Survey, Environmental Science Centre, Keyworth, Nottingham NG12 5GG, UK;4. School of Geography, University of Leeds, Leeds LS2 9JT, UK |
| |
| Abstract: | The angiosperm pollen record from the Anfiteatro de Ticó and Punta del Barco formations (Baqueró Group) is reported. The relevance of these floras is that they are accurately dated as late Aptian, and one of the oldest floras southern South America with fossil angiosperms. Twelve samples were studied, showing Clavatipollenites and Retimonocolpites as dominant types. A new species, Jushingipollis ticoensis sp. nov., is proposed. A doubtful angiosperm pollen grain, Lethomasites sp., is also identified and described. A multivariate analysis of similarities between different Early Cretaceous angiosperm pollen assemblages suggests that the Baqueró Group assemblages have great similarities with other coeval units from Argentina, Australia and United States, which were located in a similar paleolatitude. |
| |
| Keywords: | Palynology Angiosperm Late Aptian Baqueró Group Argentina |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
