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Science 19 December 1986:
Vol. 234. no. 4783, pp. 1580 - 1582
DOI: 10.1126/science.234.4783.1580
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Articles

Early Cretaceous Angiosperm Leaves from Southern South America

EDGARDO J. ROMERO 1 and SERGIO ARCHANGELSKY 2

1 Departamento Ciencias Biológicas, Universidad de Buenos Aires, Intendente Guiraldes 2620, Buenos Aires 1428, Republica Argentina.
2 División Paleobotánica, Museo de Ciencias Naturales "B. Rivadavia," Avenida Angel Gallardo 470, Buenos Aires, 1405, República Argentina.

Early angiosperm leaves from the Aptian (113 to 119 million years ago) Baqueró Formation of Patagonia have been found in a fossil flora dominated by more than 100 species of gymnosperms and pteridophytes. They may be the first early Cretaceous angiosperm leaves to be reported from southern South America and one of the few reported in the Southern Hemisphere. The leaves are large, lobate, craspedodromous, and dentate (A-1 teeth) and have ramified tertiary veins and random fourth-order venation. Several of these features have been found in coeval and younger strata elsewhere, but not in the same combination. They were probably a marginal component of the flora.

Submitted on December 27, 1984
Accepted on November 7, 1985


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