INVESTIGADORES
PUJANA Roberto Roman
artículos
Título:
Early Cretaceous Brachyoxylon woods from Argentinean Patagonia and comments on the Cheirolepidiaceae distribution
Autor/es:
GREPPI, CARLOS DANIEL; PUJANA, ROBERTO ROMÁN; UMAZANO, ALDO M.; BELLOSI, EDUARDO S.
Revista:
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2021 vol. 106 p. 103050 - 103050
ISSN:
0895-9811
Resumen:
We studied fossil woods from Matasiete and Castillo Formations (Aptian?Albian) for the first time. The woods, preserved in fluvial channel and floodplaindeposits, have anatomy consistent with the fossil-genus Brachyoxylon Hollick andJeffrey. Specimens from Castillo Formation have indistinct growth ring boundaries,exclusively uniseriate with a mixed arrangement intertracheary radial pitting,araucarioid cross-field pitting with 3?8 half-bordered pits with oblique aperture, anduniseriate rays. Specimens from Matasiete Formation are worse preserved and only onecould be assigned to Brachyoxylon with reserve. Brachyoxylon is a fossil-genusworldwide distributed and related to the fossil-family Cheirolepidiaceae, a group ofconifers that developed in various environments. However, our study suggests that thisfamily would have prospered in Patagonia in semiarid conditions, in dry forests duringthe Aptian?Albian.
