The following is taken from the original announcement on 1/11/2010.
The straight-cut Radiolarian is finally finished! This one has no centers which allowed me to add some nice corner and star-arm interior mechanisms (with none of the fudging used in the Cornered Radiolarian).
The prefix circo is a nod to Circogonia Icosahedra, the organism that isnpired the Radiolarian name.
I’ll also be calling it Radiolarian II.