Angiosperm pollen grains from the cuayuca formation (Late eocene to early oligocene), puebla, Mexico
Por:
Ramírez-Arriaga E., Prámparo M.B., Martínez-Hernández E.
Publicada:
1 ene 2015
Categoría:
Oceanography
Resumen:
Systematic descriptions and illustrations of the best preserved angiosperm pollen grains (Monocotyledonae or Liliopsida: n= 7 and Dicotyledonae or Magnoliopsida: n= 41) recovered from Cuayuca Formation (late Eocene-early Oligocene), Puebla State, Mexico are provided, some of them of chronostratigraphic importance (Aglaoreidia pristina, Armeria, Bombacacidites, Corsinipollenites, Eucommia, Favitricolporites, Intratriporopollenites, Lymingtonia, Magnaperiporites, Malvacipollis spinulosa, Margo-colporites aff. vanwijhei, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, Ranunculacidites operculatus, and Thomsonipollis sabinetownensis). Taxa identified from the Cuayuca Formation suggest local semiarid vegetation such as tropical decid-uous forest, chaparral, grassland, and arid tropical scrub, in which angiosperms are one of the main representatives. Nevertheless, temperate taxa from Pinus forest and cloud forest were also registered from regional vegetation. It is noticeable that at the present time, such taxa are well represented in the vegetation of the Balsas River Basin, which would suggest the existence of this type of flora in the Cuayuca region since the Oligocene. © Palaeontological Association February 2015.
Filiaciones:
Ramírez-Arriaga E.:
Univ Nacl Autonoma Mexico, Dept Paleontol, Inst Geol, Mexico City 04510, DF, Mexico
Prámparo M.B.:
Centro Regional de Investigaciones Científicas y Tecnológicas, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Unidad de Paleopalinología, Mendoza, Argentina
Martínez-Hernández E.:
Univ Nacl Autonoma Mexico, Dept Paleontol, Inst Geol, Mexico City 04510, DF, Mexico
All Open Access, Gold
|