Phylogeny
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Ulvophyceae

Viridiophytes: green plants -> UTC Clade

The vast majority of ulvophyceans are marine, and they include all the large green seaweeds (e.g. Codium and Caulerpa). They are characterised by counter-clockwise displacement of the flagella basal apparatus in motile cells. Very common non-marine representatives are Trentepohlia, an orange-red filament that inhabits rock surfaces, and Cladophora glomerata and Ulothrix zonata, two green filaments that proliferate in rivers world-wide. Both Cladophora and Ulothrix also have marine representatives. Although the basal position of the Ulvales and Ulotrichales within the clade seems likely, it is placed tentatively because molecular analyses to date have not strongly supported its position. In general, the traditional classification system of the Ulvophyceae has been more robust than the Chlorophyceae following the advent of molecular genetic analysis. A notable exception, however, is the transfer of the Ulotrichales from the Chlorophyceae and exclusion of many of its original members.

Indigenous or exotic to New Zealand.

NZ Flora Web Site Link to the Ngā Tipu o Aotearoa Database

 
References
Woolcott, G.W., Knöller, K., King, R.J. (2000) Phylogeny of the Bryopsidaceae (Bryopsidales, Chlorophyta): cladistic analysis of morphological and molecular data. Phycologia, 39, 471–481.
Zechman, F.W., Theriot, E.C., Zimmer, E.A., Chapman, R.L. (1990) Phylogeny of the Ulvophyceae (Chlorophyta): cladistic analysis of nuclear-encoded rRNA sequence data. Journal of Phycology, 26, 700–710.
Roles
Phil Novis PhycologistPhycologist
Last updated: 05-Mar-2013