Belongs within: Chrysophyceae. Giant cannibal algae from the watery ditch Published 8 February 2008 Chrysophytes (also known as “golden algae” due to the colour of their chloroplasts) are a class of unicellular algae found in pretty much any aquatic habitat. Your average chrysophyte is not particularly prepossessing—a single cell with one or two flagella emerging… Continue reading Ochromonadales


Belongs within: Chrysista.Contains: Fucophycidae, Dictyotaceae, Sphacelariales. The Phaeophyceae, brown algae, are a group of marine, multicellular algae with thalli containing pigments that give them an olive-green to black-brown coloration. Characters (from Adl et al. 2012): Filamentous, syntagmatic, parenchymatous or ciliated; swimming cells with two cilia usually inserted laterally—one anteriorly directed and one posteriorly directed; usually… Continue reading Phaeophyceae

Categorised as Chrysista


Belongs within: Phaeophyceae.Contains: Padina, Dictyota, Dictyopteris. On Dictyotales Published 17 July 2021 Most of the various ‘seaweeds’ found around the world can be assigned to one of three major groups, each named for their most characteristic pigments: green algae, red algae and brown algae. Of these, green algae are the closest relatives of land plants,… Continue reading Dictyotaceae


Belongs within: Chrysista. The Xanthophyceae, yellow-green algae, are a group of algae found primarily in fresh water with smaller numbers of species in soil or marine habitats. The group includes both unicellular and filamentous forms. Characters (from Adl et al. 2012): Predominately coccoid or filamentous, rarely amoeboid, ciliated or capsoid; swimming cells with two cilia,… Continue reading Xanthophyceae

Categorised as Chrysista


Belongs within: Fucales. The wracks Published 29 October 2012 ‘Wrack’ is one of those lovely old-fashioned words that doesn’t get used anywhere near as often as it deserves. As well as being an alternative for the word ‘wreck’ (such as in The Wrack of Hesperus), it refers to a number of larger brown seaweeds, including… Continue reading Fucaceae


Belongs within: Fucophycidae. Algal threads Published 13 July 2009 The brown algae of the Phaeophyceae* are one of the predominant groups of multicellular algae in the modern ocean. Though not the most speciose of the three (that title belongs to the red Macrorhodophytina), they are in many places the most ecologically significant, as this is… Continue reading Chordariaceae


Belongs within: Sar.Contains: Xanthophyceae, Phaeophyceae, Chrysophyceae. The Chrysista are a clade of mostly photosynthetic eukaryotes ancestrally with ciliary supra-tz helix (Cavalier-Smith 2018). Filling in the gaps Published 11 June 2007 It is universally accepted these days that the algae are a polyphyletic grouping, at least from the viewpoint of nuclear and cytoplasmic ancestry. Chlorophyll originally… Continue reading Chrysista