Ovoid to spherical cells with approx. cup-shaped green chloroplasts, usually containing a pyrenoid; two equal-length flagella (when prese...
Cells spindle-shaped, containing green chloroplasts, with two flagella emerging symmetrically near one end; cytoplasmic threads absent.
Cells ovoid, large, containing yellow-brown chloroplasts; two flagella emerge obliquely from a sac-like gullet at the cell anterior.
Cells contain abundant red pigment; two flagella of equal length emerge symmetrically at the cell apex; cytoplasmic threads connect the b...
Cell with pointed tail at one end, and single flagellum emerging from reservoir at the other; disc-like ring of paramylon usually promine...
Flexible cell encased in a rigid, mineralised lorica (which may be pigmented); a single flagellum emerges through the lorica via a collar...
![[Chlamydomonas], X1000. Photo: Phil Novis, Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/chlamydomonas_phil1000__FillMaxWzMwMCwyMDBd.jpg)
![[Chlorogonium] (sewage pond), X640. Photo: Otago Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/chlorogonium640__FillMaxWzMwMCwyMDBd.jpg)
![[Cryptomonas], Lake Tuakitoto, X1600. Photo: Otago Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/cryptomonas3__FillMaxWzMwMCwyMDBd.jpg)
![[Haematococcus], X400. Photo: Taranaki Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/haematococcus2__FillMaxWzMwMCwyMDBd.jpg)
![[Phacus] (sewage pond), X400. Photo: Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/phacus400__FillMaxWzMwMCwyMDBd.jpg)
![[Trachelomonas] (sewage pond), X400. Photo: Otago Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/trachelomonas400__FillMaxWzMwMCwyMDBd.jpg)