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A review of research on the cycad genus Ceratozamia brongn. (Zamiaceae) in Mexico
The low level of divergence of ITS sequences among taxa to the north of the Trans-Mexican Neovolcanic mountain range suggests a pattern of recent, and perhaps rapid, speciation.
A new species of Ceratozamia (Zamiaceae) from Tabasco and Chiapas, Mexico
Ceratozamia becerrae sp. nov. is described and illustrated. This species from Tabasco and Chiapas has affinity with C. miqueliana H. Wendl. from Veracruz and Chiapas, but differs in morphology and
Demography of the cycad Ceratozamia mirandae (Zamiaceae) under disturbed and undisturbed conditions in a biosphere reserve of Mexico
Demographic studies were made in two of its populations in the Sepultura Biosphere Reserve under different conservation conditions, it is proposed that in the nucleus zone, reproductive adults should be of highest conservation priority, whereas in the buffer zone seedling reintroduction should be carried out regularly until the population increases.
A reassessment of the Ceratozamia miqueliana species complex (Zamiaceae) of southeastern Mexico, with comments on species relationships
The Ceratozamia miqueliana species complex has been revised from a morphological, anatomical and biogeographical perspective and the new species which is related to C. zoquorum, but differs from these in leaf, male and female cone growth habit, as well as inter‐leaflet distance.
Niche conservatism promotes speciation in cycads: the case of Dioon merolae (Zamiaceae) in Mexico.
This study explains why cycads, despite their ancient lineage origin and biological stasis, have been able to diversify into modern ecosystems worldwide.
Cycad propagation by rural nurseries in Mexico as an alternative conservation strategy: 20 years on
This model was taken up by four similar nurseries in the buffer zones of two biosphere reserves in Chiapas for the propagation of four additional cycad species and two endangered Chamaedorea palms.
Morphology and Leaflet Anatomy of the Ceratozamia norstogii (Zamiaceae, Cycadales) Species Complex in Mexico with Comments on Relationships and Speciation
Effects of ecological gradients appear to explain the morphological and leaflet anatomical differences found between the species, which supports a scenario for an ecological speciation process in the C. norstogii complex.
Diversity and genetic structure of three species of Dioon Lindl. (Zamiaceae, Cycadales) from the Pacific seaboard of Mexico
Comparison of the inferred genetic structure based on F-statistics for the three species indicated differences along the north-south Pacific seaboard axis and a phenogram representing Nei's genetic distances among populations displayed three major groups, each one corresponding to each of the studied species.
Magnolia lacandonica (subsection Talauma , Magnoliaceae), a new rainforest species from Chiapas, Mexico
A new species of Magnolia from the rainforest of Chiapas, Mexico, is described and illustrated and is similar to M. mexicana but differs from the latter in having larger number of carpels and stamens.