Abstract 2250 from Intl. Bot. Congress 1999

ibclogo XVI International Botanical Congess

Abstract Number: 2250
Session = 4.5.3

PHYLOGENY OF POLYTRICHOPSIDA

Hyvönen, J., Koskinen, S., Hedderson, T. A. and Smith Merrill, G.L.* * University of Turku, Finland. University of Cape Town, South Africa. *Field Museum of Natural History, Chicago, USA.

Polytrichopsida, or nematodontous mosses, are distinguished from arthrodontous mosses by the peristome teeth composed of whole cells. Morphology and molecular sequence data have given conflicting results regarding the composition of the group and their relationships. We aimed to address the following questions: Are nematodontous mosses a monophyletic group? Does Oedopodium belong to this group? What is the phylogeny of Polytrichales? Our analysis is based on four character sets including three DNA regions (18S rDNA and chloroplast encoded rbcL and rps4 sequences) and 39 morphological characters. Species of Hepaticopsida, Sphagnopsida, Andreaopsida and Bryopsida were used as the outgroup taxa. Parsimony analysis was performed using a simultaneous unweighted approach.

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PHYLOGENY OF POLYTRICHOPSIDA

Hyvönen, J.*, Koskinen, S.*, Hedderson, T. A.** and Smith Merrill, G.L.*** * University of Turku, Finland. **University of Cape Town, South Africa. ***Field Museum of Natural History, Chicago, USA.

Hyvönen, J., Koskinen, S., Hedderson, T. A. and Smith Merrill, G.L.* * University of Turku, Finland. University of Cape Town, South Africa. *Field Museum of Natural History, Chicago, USA.