Thecofilosea Cavalier-Smith 2003, emend. Cavalier-Smith 2011
Ancestrally with robust organic extracellular theca; theca with perforations for cilia and for pseudopodia; ventral filopodia emerge from ventral groove.
1. Tectosia Cavalier-Smith 2012
Heterotrophic non-flagellates with single large nucleus and filopodia emerging from one or more apertures in a theca or central capsule; extrusomes absent.
1.1. Tectofilosida Cavalier-Smith 2012
1.1.1. Chlamydophryidae de Saedeleer 1934, emend. Meisterfeld 2002 (incertae sedis)
With a more or less flexible test that may be distorted by the contraction of the cell or by foreign material; some with attached foreign particles, scales, spines or spicules; division often longitudinal or by budding. Uni- or multinucleate; some species can fuse to form larger, multinucleate cells.
1.1.1.1. Lecythium Hertwig & Lesser 1874
Test thin, flexible and homogenous; colorless and translucent; aperture terminal, elastic; large posterior nucleus. Plasma fills the test completely. Numerous filopodia, branching, delicate and not anastomosing.
Lecythium hyalinum (Ehrenberg 1838) Hertwig and Lesser 1874
The arrow points to the aperture.
Lecythium hyalinum cluster
Lecythium spinosum (Penard 1890) Hopkinson 1915
Lecythium mutabilis Bailey, 1853
1.1.2. Diaphoropodon Archer 1869 (incertae sedis)
Test ovoid, clear, flexible with attached particles. With numerous spines (bristles). Numerous filopodia, branching, delicate and sometimes anastomosing.
Diaphoropodon mobile Archer 1869
Diaphoropodon archeri De Saedeleer 1934