Architectonicidae, common name the staircase shells or sundials, are a family of sea snails, marine gastropod mollusks in the informal group "Lower Heterobranchia" of the clade Heterobranchia.
Mathildidae is a family of minute sea snails, marine gastropod molluscs in the informal group of the Lower Heterobranchia.
Iolaea is a genus of small sea snails, pyramidellid gastropod mollusks in the tribe Chrysallidini within the family Pyramidellidae.
Tectonatica is a genus of sea snails, marine gastropod molluscs in the family Naticidae, the moon snails.
Architectonica is a genus of sea snails in the family Architectonicidae.
Euspira is a genus of medium-sized sea snails, marine gastropod molluscs in the subfamily Polinicinae of the family Naticidae, the moon snails.
Clathromangelia is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Lischkeia is a genus of sea snails, marine gastropod molluscs in the family Eucyclidae.
Tenagodus is a genus of sea snails, marine gastropod mollusks in the family Siliquariidae.
Eudolium is a genus of large sea snails, marine gastropod mollusks in the family Tonnidae, the tun shells.
Vermetus is a genus of sea snails, marine gastropod mollusks in the family Vermetidae, the worm snails or worm shells.
Metula is a genus of sea snails, marine gastropod molluscs in the family Buccinidae, the true whelks.
Niso is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Cycloscala is a genus of predatory sea snails, marine prosobranch gastropod mollusks in the family Epitoniidae, commonly known as wentletraps.
Aartsenia is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.
Psilaxis is a genus of sea snails, marine gastropod mollusks in the family Architectonicidae, the staircase shells or sundials.
Mathilda is a genus of sea snails, marine gastropod mollusks in the family Mathildidae.
Ammonicera is a genus of minute sea snails, marine gastropod molluscs or micromollusks in the family Omalogyridae.
Pseudotorinia is a genus of sea snails, marine gastropod mollusks in the family Architectonicidae, the staircase shells or sundials.
Thylacodes is a genus of sea snails, marine gastropod mollusks in the family Vermetidae, the worm snails or worm shells. The species in this genus were previously placed in the genus Serpulorbis.
