The Architectonicidae Family includes 121 species comprising 12 genus (Heliacus (36 species), Solatisonax (18), Pseudotorinia (17), ...)

Phylum      : Mollusca
 Class       : Gastropoda 
  Subclass    : Heterobranchia 
   Infraclass  : "LowerHeterobranchia" 
    Superfamily : Architectonicoidea 
     Family      : Architectonicidae

Common name : sundial shells

Aspect : the shell resembles a spiral staircase, conoid, flattened with spiral sculpture. Flat base. Broad and deep umbilicus narrowing inward, often with a thick lateral bead, the apex can be seen through the umbilicus. Horny operculum

Feeding : sea anemones, algae and polyps of rocky corals

Environment : coral reefs, tropical seas sometimes in deep waters

Architectonica perspectiva (Linnaeus, 1758)