Category: Chrysista

Belongs within: Fucophycidae.Contains: Alariaceae, Laminariaceae, Lessoniaceae. The Laminariales are an order of brown algae exhibiting a heteromorphic life cycle of parenchymatous sporophytes and sexually monomorphic, microscopic gametophytes (Kawai & Sasaki 2000). Characters (Abbott & Hollenberg 1976): Life history of two morphological phases. Sporangial thalli macroscopic; gametangial thalli microscopic. Basic macroscopic morphological pattern a blade, stipe, and holdfast, usually… Continue reading Laminariales

Belongs within: Chrysista.Contains: Paraphysomonadaceae, Synuraceae, Ochromonadales. The Chrysophyceae are a clade of mostly motile, photosynthetic organisms, though both immotile and heterotrophic forms are included. Characters (Adl et al. 2019): Predominately ciliated cells, but also capsoid, coccoid, filamentous and parenchymatous forms; swimming cells biciliated, one anteriorly directed and one laterally directed; tripartite mastigonemes with short and long lateral hairs on shaft;… Continue reading Chrysophyceae

Belongs within: Chrysophyceae.Contains: Mallomonas. The Synuraceae are autotrophic, often colonial chrysophytes lacking chlorophyll c2 and with the posterior basal body of the ciliary roots shifted to be parallel to the anterior one (Cavalier-Smith & Chao 2006). <==Synuraceae [Synurales, Synurophyceae] | i. s.: Chrysodidymus Prowse 1962L16 | `–*C. synuroideus Prowse 1962 [incl. C. gracilis Prowse 1962, Synura microcrepis… Continue reading Synuraceae

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. Molecular data support a basal position for Discosporangiales, a clade of simple branched filamentous forms with apical growth, differing from other brown algae in their continuous… Continue reading Phaeophyceae

Belongs within: Fucophycidae. The Ralfsiales are an order of brown algae that are crustose for at least part of their life cycle, with initial development being disc-shaped (Norris 2010). Characters (Norris 2010): Crustose in at least one stage of life history or only in early stages of development. Initial development of thallus disc-shaped. Cells with one to… Continue reading Ralfsiales

Belongs within: Phaeophyceae. The Sphacelariales are a group of filamentous brown algae generally exhibiting an isomorphic alternation of generations (Adl et al. 2019). Characters (Adl et al. 2019): Gametophyte and sporophyte branched multiseriate filaments, with apical growth; several scattered discoid plastids without pyrenoid; usually an isomorphic alternation of generations; isogamous, anisogamous or oogamous sexual reproduction. Sphacelariales | i. s.: Verosphacella Henry… Continue reading Sphacelariales

Belongs within: Laminariales. The Alariaceae are an Indo-Pacific family of kelps with sporangia restricted to sporophylls that are mostly found on the stipe. <==Alariaceae |–Undariella Petrov & Kusakin 1997SRR14 |–Pterygophora Ruprecht 1852SRR14 | `–P. californica Ruprecht 1852S57 |–Eualaria Areschoug 1884 [incl. Druehlia Lane & Saunders in Lane et al. 2007]SRR14 | `–*E. fistulosa [=Alaria fistulosa]SRR14 |–Lessoniopsis… Continue reading Alariaceae

Belongs within: Dictyotaceae. Dictyota is a genus of brown algae with a thallus comprised of strap-like, repeatedly branched segments growing from a single apical cell (Norris 2010). Characters (Norris 2010): Erect or repent (prostrate), composed of flat ribbon-like fronds that are clumped or bushy in appearance, yellow- to dark brown, occasionally iridescent. Branching regularly or irregularly dichotomous or… Continue reading Dictyota

Belongs within: Fucophycidae. Desmarestia, acid kelp, is a genus of brown algae in which many species sequester sulphuric acid in intracellular vacuoles (Norris 2010). Characters (Norris 2010): Sporophytic thalli macroscopic, erect, with a single cylindrical or compressed main axis that is ligulateto broadly bladelike, usually pinnately or oppositely branched, occasionally simple and unbranched, attached below by discoid… Continue reading Desmarestia