? Haptophytes
Coccolithophore (Emiliania huxleyi)
Scientific classification
Kingdom: Protista (Chromalveolata) Phylum: Haptophyta
Orders
Class Pavlovophyceae    Pavlovales Class Prymnesiophyceae    Prymnesiales    Phaeocystales    Isochrysidales    Coccolithales

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. 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 (as opposed to folk taxonomy). ... Typical phyla Rhodophyta (red algae) Chromista Heterokontophyta (heterokonts) Haptophyta Cryptophyta (cryptomonads) Alveolates Dinoflagellata Apicomplexa Ciliophora (ciliates) Excavates Euglenozoa Percolozoa Metamonada Rhizaria Radiolaria Foraminifera Cercozoa Amoebozoa Choanozoa Many others; classification varies Protists (IPA: [prəʊˌtɪst]) are a heterogeneous group of living things, comprising those eukaryotes that are neither animals, plants... Chromalveolates are a hypothetical grouping of eukaryotes, comprising the Chromista and alveolates, suggested by Tom Cavalier-Smith. ... Coccolithophores are single-celled algae belonging to the haptophytes. ... Coccolithophores are single-celled algae belonging to the haptophytes. ... A seaweed (Laurencia) up close: the branches are multicellular and only about 1 mm thick. ... The inside of a chloroplast 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) 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. ... This article contains material from the Science Primer published by the NCBI, which, as a US government publication, is in the public domain at http://www. ... 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. ...

Most haptophytes are coccolithophores, which are ornamented with calcified scales called coccoliths, and are sometimes found as microfossils. Other planktonic haptophytes of note include Chrysochromulina and Prymnesium, periodically form toxic marine algal blooms. 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. ...