The Palmophyllales are a deep-branching

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

of thalloid green alga, possibly forming a sister group to the Chlorophyta. They survive today in deep waters, where predation pressure is reduced. The group contains the genera ''

Palmophyllum ''Palmophyllum'' is a genus of alga Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Includ ...

'', '' Verdigellas'' and ''

Palmoclathrus ''Palmoclathrus'' is a monotypic genus of alga Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clad ...

''. The morphology of Palmophyllales is unusual in that they are composed of cells in a gelatinous matrix, so they are multicellular, but not in a conventional way.

Genera

* ''

'' Womersley 1971 * ''

'' Kützing 1845 non Conwentz 1886 * '' Verdigellas'' Ballantine & Norris 1994

References

Green algae orders Palmophyllophyceae {{Algae-stub