INVESTIGADORES
BARREDA Viviana Dora
artículos
Título:
Early history of Asteraceae in Patagonia: evidence from fossil pollen grains
Autor/es:
KATINAS, L.; CRISCI, J.V.; TELLERÍA, M.C.; BARREDA, V.; PALAZZESI, L.
Revista:
New Zealand Journal of Botany
Editorial:
RSNZ PUBLISHING
Referencias:
Año: 2007 vol. 45 p. 605 - 610
ISSN:
0028-825X
Resumen:
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.