Bumps: Outer wall structure in shape of a subspherical/hemispherical dome.
Similar: Tumuli, pustule.
Carcass: Part of wall on intervallum side.
OW: Outer wall.
SW: Single wall.
Tumulus (plur. tumuli): Outer wall structure in shape of a subspherical dome covering an individual and downwardly projected wall opening.
Pustula (plur. pustulae): Wall structure covering an individual pore and pierced by a single central orifice.
NB: Pustulae resemble simple tumuli.
Number of perforation on carcass bumps (OW/SW) | |_ Direction of carcass bumps perforation (OW/SW)