MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Early history of Asteraceae in Patagonia: evidence from fossil pollen grains
KATINAS, L.; CRISCI, J.V.; TELLERÍA, M.C.; BARREDA, V.; PALAZZESI, L.
New Zealand Journal of Botany
Año: 2007 vol. 45 p. 605 - 605
The Asteraceae are classified into three subfamilies: Barnadesioideae, Cichorioideae, and Asteroideae. it has been suggested that the southern South American subfamily Barnadesioideae is the basal branch of the phylogenetic tree of the family, and Patagonia is the ancestral area of Asteraceae. Here we explore the chronological records of some members of the family, with findings of Mutisiinae (tribe Mutisieae, subfamily Cichorioideae) from the Late oligocene (2823 Ma) and of Barnadesioideae and Nassauviinae (Mutisieae) from the early Miocene (2320 Ma), all recovered from marine deposits of Patagonia. even though the succession of fossil appearances (first Mutisieae) differs from that provided by molecular data (first Barnadesioideae), this new scheme offers additional evidence towards the understanding of the early history of ancestral Asteraceae.