Biology / Unit 9 Bio 2011 short lesson, about 20 seconds
Rhizaria: Forams and Radiolarians
Captions available
The idea
Rhizaria is defined by thin, thread-like or needle-like pseudopodia, distinct from Amoebozoa's broader lobes; forams and radiolarians are its shelled representative subgroups.
In practice
A foraminiferan builds a porous, calcium-carbonate test; a radiolarian builds an intricate, glassy silica shell with radial symmetry.
Where people slip
Confusing Rhizaria's thin, thread-like pseudopodia with Amoebozoa's broader lobes can mis-sort a shelled amoeba into the wrong supergroup.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for Biology