Haptophyte

phylum of algae

Haptophytes are a phylum of algae, sometimes called the Prymnesiophyta.[1] All or most of them are single-celled photosynthetic phytoplankton.

Haptophytes
Coccolithus pelagicus.jpg
Coccolithophore (Coccolithus pelagicus)
Scientific classification
Domain:
Kingdom:
Phylum:
Haptophyta

Hibberd 1976
Orders

Class Pavlovophyceae
   Pavlovales
Class Prymnesiophyceae
   Prymnesiales
   Phaeocystales
   Isochrysidales
   Coccolithales

The cells typically have two slightly unequal flagella and a unique organelle called a haptonema. This is superficially similar to a flagellum, but differs in its arrangement of microtubules, and in its use. The name comes from the Greek hapsis = touch, and nema = thread.

ClassificationEdit

Molecular and morphological evidence places them in five orders; coccolithophores make up the Isochrysidales and Coccolithales. Other groups include phytoplankton which produce the toxic algal blooms.


ReferencesEdit

  1. R.A. Anderson. 2004. Biology and systematics of heterokont and haptophyte algae. American Journal of Botany 91: 1508-1522. [1]