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Abstract Detail


Pteridological Section/AFS

McClelland, Donald [1], Moran, Robbin [2], Rouhan, G. [3], Garrison Hanks, Judith [4].

Phylogenetic significance of perispore morphology in the fern genus Lomariopsis (Lomariopsidaceae).

USING a preliminary tree based on the trnL-trnF spacer (unpublished), the phylogenetic significance of perispore morphology in Lomariopsis was assessed. With a scanning electron microscope, the spores of 33 of the 45 species in the genus were imaged. The images formed five groups based on perispore features, and these groups were then compared to the phylogeny. Although several parallelisms or reversals were evident, perispore morphology supported many of the tree’s main branches. The preliminary tree showed a subclade of two African species nested in an otherwise neotropical clade, suggesting a long-distance dispersal event from the Neotropics to Africa of the ancestor of these two species. Spores support this relationship.


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1 - The New York Botanical Garden, Institute of Systematic Botany, and The City University of New York, Plant Science Program, 200th St. and Kazimiroff Blvd., The Bronx, New York, 10458, USA
2 - New York Botanical Garden, Institute of Systematic Botany, 200Th Street & Southern Boulevard, Bronx, New York, 10458-5126, USA
3 - Universite Pierre et Marie Curie,, Laboratoire de Paléobotanique et Paléoécologie,, 12 rue Cuvier,, 75005, Paris, , France
4 - Marymount Manhattan College, Biology, 221 East 71st street, New York, New York, 10021, USA

Keywords:
spores
ferns
phylogeny
monilophytes.

Presentation Type: Poster:Posters for Sections
Session: 48-125
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:545


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