iHaptophytes
Coccolithophore (Emiliania huxleyi)
Scientific classification
Domain: Eukaryota (unranked) Chromista Phylum: Haptophyta
Orders
Class Pavlovophyceae    Pavlovales Class Prymnesiophyceae    Prymnesiales    Phaeocystales    Isochrysidales    Coccolithales Image File history File links Emiliania huxleyi, a coccolithophore. ... Coccolithophores are single-celled algae belonging to the haptophytes. ... Binomial name Emiliania huxleyi (Hay & Mohler in Hay, Mohler, Roth, Schmidt & Boudreaux, 1967) Emiliania huxleyi is a species of coccolithophore, single-celled phytoplankton that are covered with uniquely ornamented calcite disks. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Kingdoms Eukaryotes are organisms with complex cells, in which the genetic material is organized into membrane-bound nuclei. ... The Chromista are a eukaryotic supergroup, which may be treated as a separate kingdom or included among the Protista. ... Coccolithophores are single-celled algae belonging to the haptophytes. ... Coccolithophores are single-celled algae belonging to the haptophytes. ...

The haptophytes, classed either as the Prymnesiophyta or Haptophyta, are a group of algae. The chloroplasts are pigmented similarly to those of the heterokonts, such as golden algae, but the structure of the rest of the cell is different, so it may be that they are a separate line whose chloroplasts are derived from similar endosymbionts. A seaweed (Laurencia) up close: the branches are multicellular and only about 1 mm thick. ... Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. ... Typical classes Colored groups Chrysophyceae (golden algae) Synurophyceae Actinochrysophyceae (axodines) Pelagophyceae Phaeothamniophyceae Bacillariophyceae (diatoms) Bolidophyceae Raphidophyceae Eustigmatophyceae Xanthophyceae (yellow-green algae) Phaeophyceae (brown algae) Colorless groups Oomycetes (water moulds) Hypochytridiomycetes Bicosoecea Labyrinthulomycetes (slime nets) Opalinea Proteromonadea The heterokonts or stramenopiles are a major line of eukaryotes. ...

The cells typically have two slightly unequal flagella, both of which are smooth, and a unique organelle called a haptonema, which is superficially similar to a flagellum but differs in the arrangement of microtubules and in its use. The name comes from the Greek hapsis, touch, and nema, thread. The mitochondria have tubular cristae. A flagellum (plural, flagella) is a whip-like organelle that many unicellular organisms, and some multicellular ones, use to move about. ... Microtubules are protein structures found within cells, one of the components of the cytoskeleton. ... Electron micrograph of a mitochondrion showing its mitochondrial matrix and membranes In cell biology, a mitochondrion (plural mitochondria) (from Greek μιτος or mitos, thread + κουδριον or khondrion, granule) is a membrane-enclosed organelle, found in most eukaryotic cells. ... Cross-section of a mitochondrion, showing: (1) inner membrane, (2) outer membrane, (3) cristae, (4) matrix Cristae are the infoldings of the inner membrane of a mitochondrion. ...

The best-known haptophytes are coccolithophores, which have an exoskeleton of calcareous plates called coccoliths. Coccolithopohres are some of the most abundant marine phytoplankton, especially in the open ocean and are extremely abundant as microfossils. Other planktonic haptophytes of note include Chrysochromulina and Prymnesium, periodically form toxic marine algal blooms, and Phaeocystis blooms of which can produce unpleasant foam which often accumulates on beaches. Both molecular and morphological evidence supports their division into five orders; coccolithophores make up the Isochrysidales and Coccolithales. Coccolithophores are single-celled algae belonging to the haptophytes. ... Coccoliths are the individual plates formed by coccolithophores such as Emiliana huxleyi1, and arranged around them in a coccosphere. ... An algal bloom is a relatively rapid increase in the population of (usually) phytoplankton algae in an aquatic system. ...