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Choanoflagellate facts for kids

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Choanoflagellates
Temporal range: 900–0Ma
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No fossils known, molecular clock evidence for origin 1050-800Ma
Codosiga sp.
Scientific classification
(unranked): Obazoa
(unranked): Opisthokonta
(unranked): Holozoa
(unranked): Filozoa
(unranked): Choanozoa
Class: Choanoflagellatea
Cavalier-Smith, 1998
Orders & families
  • Craspedida
    • Codonosigidae (incl. Salpingoecidae)
  • Acanthoecida
    • Stephanoecidae
    • Acanthoecidae
Synonyms
  • Craspedmonadina Stein, 1878
  • Choanoflagellata Kent, 1880
  • Craspedomonadaceae Senn, 1900
  • Craspedophyceae Chadefaud, 1960
  • Craspédomonadophycidées Bourrelly, 1968
  • Craspedomonadophyceae Hibberd, 1976
  • Choanomonadea Krylov et al., 1980
  • Choanoflagellida Levine et al., 1980, Lee et al., 1985
  • Choanoflagellea Cavalier-Smith, 1997
  • Choanomonada Adl et al. 2005
Sphaeroeca-colony
Sphaeroeca, a colony of choanoflagellates (about 230 individuals)

The choanoflagellates are a class or phylum of collared microscopic flagellate eukaryotes. Some species are single cells, some are multicellular. They do not have chloroplasts, and are heterotrophic. Some consider they form the simplest phylum of animals; others consider them to be protists.

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