Excavata

Definition

Excavata is a major supergroup of unicellular eukaryotes characterized by their feeding groove, which is used to capture food. They include important parasitic species that affect humans and animals.

5 Must Know Facts For Your Next Test

1. Excavata includes medically important parasites like Giardia and Trichomonas.
2. Members of Excavata often have modified mitochondria or lack them entirely.
3. These organisms can be free-living or parasitic, impacting both health and ecosystems.
4. They are known for their flagella, which they use for movement.
5. The group is named for the 'excavated' feeding groove found in many of its members.

Review Questions

Related terms

Giardia:

A genus within the Excavata group known for causing gastrointestinal infections.

Trichomonas: A genus within the Excavata group known for causing sexually transmitted infections.

Flagella:

Whip-like appendages used by some protists, including many in the Excavata group, for movement.