Penard Labs

The Fascinating World of Amoebae
Stramenopiles Patterson 1989, emend. Adl et al. 2005
Motile cells typically biciliate, typically with heterokont ciliation; anterior cilium with tripartite mastigonemes in two opposite rows and a posterior usually smooth cilium.

1. Actinophryidae Dujardin 1841
Ciliated cells absent. Axonemal pseudopodia with stiff microtubular core (axopodia). Axopodia originate from an amorphous centrosome near nuclei. Single large central nucleus or several peripheral nuclei.

Including: Actinophrys, Actinosphaerium.

Stacks Image 6674

2. Chrysophyceae Pascher 1914
Predominantely ciliated cells, swimming cells biciliated. Cell coverings, when present, include organic scales, siliceous scales, organic lorica, and cellulose cell wall; eyespots present or absent. With statospores.

Including: Dinobryon, Epipyxis, Cyclonexis, Chrysostephanosphaera, Chrysamoeba, Lagynion, Paraphysomonas.

Stacks Image 6730

3. Picophagophyceae Cavalier-Smith 2006
Naked plasmodium with finely branched filopodia and yellowish-green plastids and multiple vesicular nuclei.

Including: Chlamydomyxa.

Stacks Image 6779

4. Dictyochophyceae Silva 1980
Single cells, colonial ciliated cells or amoebae; swimming cells usually with one cilium, anteriorly directed. Cells naked, with organic scales or with siliceous skeleton; eyespots absent.

Including: Ciliophrys, Palatinella.

Stacks Image 6833

5. Synurales Andersen 1987
Predominantely ciliated cells, benthic palmelloid colonies known; swimming cells usually with two anteriorly directed cilia. Cells covered with bilaterally symmetrical silica scales; eyespots absent; statospores.

Including: Synura, Mallomonas.

Stacks Image 6887

6. Labyrinthulomycetes Dick 2001
Mainly osmotrophic cells capable of producing an ectoplasmic network of branched, anastomosing, wall-less filaments via a specialized organelle known as the bothrosome; Golgi-derived scales; biciliate zoospores with lateral insertion in many species.

Including: Amphitrema, Diplophrys.

Stacks Image 7069