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Department of Botany, Stockholm University, SE-106 91 Stockholm, Sweden, and Molecular Systematics Laboratory, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden.
2002 (English)In: American Journal of Botany, ISSN 0002-9122, E-ISSN 0032-0919, Vol. 89, no 3, 506-517 p.Article in journal (Refereed) Published
Abstract [en]

A phylogenetic framework is developed for the clubmoss family Selaginellaceae based on maximum parsimony analyses of molecular

data. The chloroplast gene rbcL was sequenced for 62 species, which represent nearly 10% of living species diversity in the family.

Taxa were chosen to reflect morphological, geographical, and ecological diversity. The analyses provide support for monophyly of

subgenera Selaginella and Tetragonostachys. Stachygynandrum and Heterostachys are polyphyletic. Monophyly of Ericetorum is

uncertain. Results also indicate a large number of new groupings not previously recognized on morphological grounds. Some of these

new groups seem to have corresponding morphological synapomorphies, such as the presence of rhizophores (distinctive root-like

structures), aspects of rhizophore development, and leaf and stem morphology. Others share distinctive ecological traits (e.g., xerophytism).

For many groups, however, no morphological, ecological, or physiological markers are known. This could reflect patchy

sampling and a lack of detailed knowledge about many species. Despite a lengthy fossil record dating from the Carboniferous Period,

cladogram topology indicates that most of the living tropical species are probably the products of more recent diversifications. Resurrection

plants, extreme xerophytes characterized by aridity-driven inrolling of branches and rapid revival on rehydration, have evolved

at least three times in quite different clades.

Place, publisher, year, edition, pages
2002. Vol. 89, no 3, 506-517 p.
National Category
Biological Systematics
URN: urn:nbn:se:uu:diva-162142OAI: oai:DiVA.org:uu-162142DiVA: diva2:459049
Available from: 2011-11-24 Created: 2011-11-24

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Korall, Petra
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