INVESTIGADORES
REMESAL Marcela Beatriz
artículos
Título:
Ferns: a paleoclimatic significant component of the Cretaceous flora from Livingston Island, Antarctica
Autor/es:
CESARI, S; REMESAL, M. B.; PARICA C A,
Revista:
PUBLICACION ESPECIAL - ASOCIACION PALEONTOLOGICA ARGENTINA
Editorial:
ASOCIACIÓN PALEONTOLÓGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2001 vol. PE7 p. 45 - 50
ISSN:
0328-347X
Resumen:
Available data on Early Cretaceous Antarctic ferns, based on mega and microfossils from Cerro
Negro Formation (Shetland Islands) in Livingston Island are evaluated, together with the information pr*
vided by recently collected fossils. Anatomically well preserved Osmundaceous stem are common in the
fossil assemblage. The cyatheaceae are represented by fertile foliage with spores in situ and the first
Antarctic petrified stems of this family are found in Cretaceous strata. Fertile structures support the presence
of Marattiaceae in the flora. Spores of Lophosoriaceae and other families are present. This diversity
suggests that ferns successfully inhabited these Antarctic areas during the Early Cretaceous, therefore at
least warm, frost-free paleoclimatic conditions are proposed.