MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Fossil woods (Coniferales) from the Baqueró Group (Aptian), Santa Cruz Province, Argentina
Autor/es:
VERA, EZEQUIEL IGNACIO; CESARI, SILVIA NÉLIDA
Revista:
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.
Editorial:
ACAD BRASILEIRA DE CIENCIAS
Referencias:
Lugar: Rio de Janeiro; Año: 2012 vol. 84 p. 617 - 617
ISSN:
0001-3765
Resumen:
Two new conifer morphospecies represented by a secondary xylem are reported for the Early Cretaceous Baqueró Group (Santa Cruz Province, Argentina). Agathoxylon sp. is characterized by poorly defined growth rings, predominantly uniseriate pitting in the radial wall of the tracheids, cross fields with 1-6 pits and uniseriate rays. These features are shared with the leafy branches described for the unit as Araucaria grandifolia Feruglio emend. Del Fueyo et A. Archangelsky. The second taxon, Brachyoxylon sp. cf. B. boureaui, possesses poorly defined growth rings, mixed wood with predominantly uniseriate radial pitting, cross fields with 8-26 pits and uniseriate rays. These taxa represent the first fossil woods described for Baqueroan strata.