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Chrysophyte

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Definition

noun, plural: chrysophytes

(phycology) Any of the members of the taxonomic class Chrysophyceae


Supplement

Many of the chrysophytes live in freshwater. They are characterized mainly by the presence of the pigment fucoxanthin in high amounts. Many of the members of Chrysophyceae are flagellated. Some of them have one flagellum such as that of Chromulina sp. Others have two flagella such as those of Ochromonas sp. Although most of them are flagellated some chrysophytes are non-motile, such as Chrysaccus sp. There are also members of this class, e.g. Chrysamoeba sp., that are amoeboid although they also go through flagellate stages.

Chrysophytes are members of Class Chrysophyceae. Chrysophyceae or chrysophytes together with the xanthophytes (Xanthophyceae) and the diatoms (Bacillariophyceae) comprise the Phylum Chrysophyta according to Pasher's system of classification.1 It should be noted, however, that the taxonomic classification of organisms is bound to change as further studies of the species would lead to newer system of classification, such as that in The NCBI taxonomy database.2 Accordingly, Chrysophyceae belongs to Phylum Heterokontophyta and is comprised of the following orders: Chromulinales, Chrysosphaerales, Hibberdiales, Hydrurales, Phaeothamnales, and yet-to-be-classified Chrysophyceae genera.


Word origin: Ancient Greek khrusós (“gold”) +‎ -phyte ‎(“plant”)

Scientific classification:

  • Domain: Eukarya
  • Phylum: Heterokontophyta
  • Class: Chrysophyceae

Other common name(s):

  • chrysomonad
  • golden alga
  • golden-brown alga

See also:


Reference(s):
1 Pascher, A. (1914). "Über Flagellaten und Algen ". Berichte der deutsche botanischen Gesellschaft 32: 136–160.
2 The NCBI taxonomy database. Retrieved on 2016 Feb. 26, from http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=2825&lvl=2.