Metamonad

The metamonads are a large group of flagellate amitochondriate microscopic eukaryotes. Their composition is not entirely settled, but they include the retortamonads, diplomonads, and possibly the parabasalids and oxymonads as well. These four groups are all anaerobic (many being aerotolerant anaerobes), occurring mostly as symbiotes or parasites of animals, as is the case with Giardia lamblia which causes diarrhea in mammals.

Metamonad
Giardia lamblia, a parasitic diplomonad
Scientific classification
Domain: Eukaryota
(unranked): Excavata
Phylum: Metamonada
Grassé 1952 emend. Cavalier-Smith 2003
Classes & orders
Synonyms
  •  ?Archezoa
  • Centrosomea Chatton Villeneuve 1937
  • Metamonadina Grassé 1952
  • Polymastigota Butschli 1884
  • Tetramastigota Hulsmann & Hausmann 1994
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