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Abstract Detail


Systematics/Phytogeography / Taxonomie/ Section

Eriksson, Torsten [1], Lundberg, Magnus [2], Ostensson, Pia [3], Töpel, Mats [4].

The need for phylogenetic hypotheses in alpha taxonomy: A study into the polyphyletic Sibbaldia (Rosaceae).

Species have been classified in Sibbaldia based on reduced number of flower parts when compared to close relatives such as Potentilla, and their generally "small flowers". By design, new species must be classified in a Genus in order to be named, and when relevant information about relationships is lacking the easy way out may be to resort to the use of "key characters". Our phylogenetic hypotheses, using DNA sequence data, show that using key characters such as reduced flower parts as defining features for Sibbaldia has resulted in naming a polyphyletic group. Different solutions, both specific for the group in question and for alpha taxonomy in general are presented.


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1 - Bergius Foundation, Royal Swedish Academy of Sciences, Box 50017, Stockholm, SE-10405, Sweden
2 - Stockholm University, Department of Botany, Stockholm, 10691, Sweden
3 - Swedish Museum of Natural History, Department of Phanerogamic Botany, Box 50007, Stockholm, 10405, Sweden
4 - University of Gothenburg, Department of Plant and Environmental Sciences, Box 461, Göteborg, 405 30, Sweden

Keywords:
phylogeny
classification
polyphyly
Rosaceae.

Presentation Type: Oral Paper:Papers for Sections
Session: 46
Location: 169/Law
Date: Tuesday, July 29th, 2008
Time: 2:00 PM
Number: 46005
Abstract ID:604


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