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Journal Article

Taxonomic revision of Zamia in Mega-Mexico

Fernando Nicolalde-Morejón, Andrew P. Vovides and Dennis W. Stevenson
Brittonia
Vol. 61, No. 4 (1 December 2009), pp. 301-335
Published by: Springer on behalf of the New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/40648244
Page Count: 35

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Topics: Pollen, Plant spines, Leaves, Peduncle, Petioles, Ploidies, Species, Forest habitats, Holotypes, Stems
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Taxonomic revision of
              Zamia
              in Mega-Mexico
Preview not available

Abstract

The genus Zamia is revised for Mega-Mexico, with 22 species recognized and described. The study presents a taxonomic clarification for the genus in Mesoamerica, a contribution that provides the foundation for a future monograph for Zamia in the Neotropics. The largest proportion of species richness and endemism for the genus is concentrated in southeastern Mexico, among the states of Chiapas, Oaxaca, Tabasco, and Veracruz, an area that is considered highly diverse in floristic terms. Distribution maps and a key to species are also provided, as well as complete descriptions of the specimens examined, including information on nomenclatural types, habitats, synonymies, and etymologies. A lectotype is designated for Zamia loddigesii, and neotypes for Z. galeottii, Z. leiboldii var. angustifolia, and Z. variegata. Zamia spartea is illustrated for the first time, and chromosome numbers for Z herrerae are reported and illustrated. Finally, scanning electron micrographs of leaflet trichome character states are presented, along with a discussion of their systematic implications within the group. El género Zamia es revisado para Mega-México, con 22 especies descritas y una species dubia. El estudio está orientado al esclarecimiento taxonómico del género en Mega-México, una contribución que siente los fundamentos para una futura monografía para Zamia en el Neotrópico. La mayor riqueza y endemismo para el género se concentra en el sureste de México, entre los estados de Chiapas, Oaxaca, Tabasco y Veracruz, área de alta biodiversidad florística. Mapas de distribución y una clave para las especies son presentadas, como también descripciones completas, tipos, habitat, sinónimos, etimología y especímenes examinadas. Se designa un lectotipo para Zamia loddigesii, y neotipos para Z. galeottii, Z. leiboldii var. angustifolia y Z. variegata. Zamia spartea es ilustrada por primera vez y números cromosómicos para Z herrerae son presentados. Finalmente, se presentan fotografías de tricomas al microscopio electrónico y una discusión de sus implicaciones en la sistemática del grupo.

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