Bumps: Outer wall structure in shape of a subspherical/hemispherical dome.
Similar: Tumuli, pustule.
Carcass: Part of wall on intervallum side.
Outer wall: External part of the skeleton, composed by a porous carcass, simple or coated by a additional sheath.
Single wall: External part of the skeleton for one-walled cup, composed by a porous carcass, simple or coated by a additional sheath.
Pustula (plur. pustulae): Wall structure covering an individual pore and pierced by a single central orifice.
NB: Pustulae resemble simple tumuli.
Tumulus (plur. tumuli): Outer wall structure in shape of a subspherical dome covering an individual and downwardly projected wall opening.
No subspherical/hemispherical structure.
structure | |_ Carcass bumps: outer wall or single wall (OW/SW) | |_ Perforation of carcass bumps (OW/SW) {None , isn't included in the term}