1. Zooflagellates and Choanoflagellates By Maddy Smith

2. Basic Facts-Zooflagellates  Unicellular (few are colonial)  Spherical or elongated bodies  Central nucleus  Whiplike flagella for movement  Some engulf food using pseudopoda, others have defined mouths

3. Nutrition  Heterotrophic  Ingest living or dead organisms OR absorb nutrients from dead/decomposing organic matter  Free-living or endosymbionts  Trichonymphs live in guts of termites and cockroaches (mutualism)  Have special enzymes for digesting cellulose (in endosym. Instances)

4. Relationships  Can be parasitic and pathogenic  Trypanosoma- human parasite which causes African sleeping sickness  Diplomonad: zooflagellate with one or two nuclei, no mitochondria, 1-4 flagella  Giardia intestinalis: common contaminate in mountain streams

5. Choanoflagellates Phylum: Zoomastigina

6. Facts  Water-dwellers: marine and freshwater  Free-swimming or sessile (permanently attached by a thin stalk to debris)  Single flagellum surrounded at base by collar of microvilli