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Estimation of genetic variation in closely related cycad species in Ceratozamia (Zamiaceae: Cycadales) using rapds markers
(Universidad de Costa Rica, 2017)
The last patagonian cycad, austrozamia stockeyi gen. et sp. nov., early eocene of laguna del hunco, Chubut, Argentina
(National Research Council Canada-NRC Research Press, 2016-09)
The cycads pose classic problems in evolutionary biogeography, owing to their far-flung extant distributions and the sparse fossil records of living genera. A noteworthy example is Tribe Encephalarteae of Family Zamiaceae, ...
An Early Cretaceous zamiaceous cycad of South West Gondwana: Restrepophyllum nov. gen. from Patagonia, Argentina
(Elsevier Science, 2010-07)
The record of Cycadales in Patagonia begins in the Triassic and extends up to the Oligocene. In this region the group is highly diversified and includes several taxa represented by trunks, leaves and pollen cones. A new ...
On the presence of the Cycad Pseudoctenis Dentata Archangelsky and Baldoni in the Punta del Barco formation (late Aptian), Santa Cruz province, Argentina
(Asociacion Paleontologica Argentina, 2013)
En el sur de América del Sur más de veinte especies de Pseudoctenis (Cycadales) han sido registradas en depósitos comprendidos entre el Triásico Superior y el Cretácico Inferior. Sin embargo, sólo tres especies, pertenecientes ...
Extending the generality of leaf economic design principles in the cycads, an ancient lineage
(Wiley Blackwell Publishing, Inc, 2015-04)
Summary: Cycads are the most ancient lineage of living seed plants, but the design of their leaves has received little study. We tested whether cycad leaves are governed by the same fundamental design principles previously ...
Orden cycadales
(Universidad Nacional de Colombia. Facultad de Ciencias. Instituto de Ciencias NaturalesSede BogotáBogotá, Colombia, 2001)
Se presenta el tratamiento sistematico de las especies pertenecientes al orden Cycadales que crecen en Colombia. En los capitulos introductorios se presentan la historia taxonémica, la morfologia de los érganos vegetativos ...