Belongs within: Myzozoa.Contains: Syndina, Noctilucales, Peridinea, Gyrodinium, Amphidinium. The Dinoflagellata are a clade of unicellular eukaryotes with phycodnavirus-like basic chromatin proteins. The cell is divided into anterior and posterior sections by a helicoidal cingulum in members of the Syndina and Dinokaryota (Cavalier-Smith 2018). Little whirling photosynthetic (and not so photosynthetic) thingies Published 27 May 2007… Continue reading Dinoflagellata
Category: Myzozoa
Perkinsidae
Belongs within: Myzozoa. The Perkinsidae are alveolate protists found as parasites on other aquatic organisms. Characters (Adl et al. 2019): Trophozoites parasitic, dividing by successive binary fissions; released trophozoites (hypnospores) developing outside host to form zoospores via formation of zoosporangia or morphologically undifferentiated mononucleate cells via hypha-like tube; zoospores biciliate; apical organelles including incomplete conoid (open along one side),… Continue reading Perkinsidae
Dissodinium
Belongs within: Gymnodinoidia. Dissodinium is a genus of dinoflagellates parasitic on eggs of copepods (Dodge & Lee 2002). Characters (Dodge & Lee 2002): Multistage life history with gymnodinioid dinospores parasitising copepod eggs; globular cyst formed, then lunate cysts within this; lunate cysts released, each forming many zoospores. The life and times of Dissodinium Published 20… Continue reading Dissodinium
Peridinea
Belongs within: Dinoflagellata.Contains: Actiniscaceae, Oodiniaceae, Gymnodinoidia, Peridinoidia. The Peridinea are a clade of dinoflagellates characterised by a shallow-gyre, usually equatorial, cingulum, and the histone-like protein HLPI (Cavalier-Smith 2018). <==Peridinea (see below for synonymy) |–DinophycidaeC-S18 | |–GymnodinoidiaC-S18 | |–PeridinoidiaC-S18 | `–Torodinida [Epidinia, Torodiniales]C-S18 | |–LabourodiniumC-S18 | |–KapelodiniumAB19 | `–Torodinium Kofoid & Swezy 1921FT93 | |–*T. teredo (Pouchet) Kofoid… Continue reading Peridinea
Peridiniales
Belongs within: Peridiniphycidae.Contains: Congruentidiaceae, Thoracosphaeraceae, Glenodiniaceae, Peridiniaceae. The Peridiniales are an order of dinoflagellates typically exhibiting symmetry around first apical plate. Subgroups include the Heterocapsaceae, suboval cells with a rounded episome and rounded to pointed hyposome (Dodge & Lee 2002). Characters (Dodge & Lee 2002): Tabulation exhibiting, or derived from, pattern with symmetry about first apical plate (left… Continue reading Peridiniales
Heterodinium
Belongs within: Peridiniphycidae. Heterodinium is a genus of marine dinoflagellates with the ventral pore situated on a small platelet on the ventral episome (Fensome et al. 1993). Characters (Fensome et al. 1993): Cell dorsoventrally compressed or subspheroidal; usually slightly asymmetrical, sulcus a short, narrow, midventral groove. Episome tapered towards apex or distinctly rounded. Usually two well defined antapical horns or spines, occasionally… Continue reading Heterodinium
Peridiniaceae
Belongs within: Peridiniales.Contains: Peridinium. The Peridiniaceae are a group of dinoflagellates with a distinct cingulum, containing four to six cingular plates, and at least one intercingular boundary on the dorsal surface. Fossil cysts of this family are abundant in Cretaceous and Cenozoic marine deposits (Fensome et al. 1993). Characters (Fensome et al. 1993): Test with… Continue reading Peridiniaceae
Glenodiniaceae
Belongs within: Peridiniales. The Glenodiniaceae are subglobular dinoflagellate with six postcingular plates and four Kofoid apical plates (Fensome et al. 1993). Glenodinium and the horseshoe of light Published 30 January 2012 Yes, it’s another dinoflagellate. The subject of the above photo (from here) is Glenodinium pulvisculus. Glenodinium is a genus of photosynthetic, mostly freshwater dinoflagellates in the… Continue reading Glenodiniaceae
Peridinium
Belongs within: Peridiniaceae. Peridinium is a genus of dinoflagellates with a well-marked cingulum found primarily in freshwater (occasionally brackish water) environments (Dodge & Lee 2002). The state of Peridinium Published 12 December 2011 As I’ve said on many an occasion before, dinoflagellates are complicated. Obscenely complicated. So when my search for a random post topic brought… Continue reading Peridinium
Protoperidinium
Belongs within: Congruentidiaceae. Protoperidinium is a genus of dinoflagellates including marine species historically assigned to Peridinium. Protoperidinium grande Published 31 August 2010 Many references describe dinoflagellates as photosynthetic; this is wrong, in the same way as describing mosquitoes as feeding on blood is wrong. In terms of number of species, there are probably more non-photosynthetic than photosynthetic… Continue reading Protoperidinium