Architectonica is a genus of sea snails, marine gastropod mollusks in the family Architectonicidae, the staircase shells or sundials.

According to the World Register of Marine Species, the following * Are included in the genus Architectonica
Architectonica arcana Bieler, 1993Architectonica consobrina Bieler, 1993Architectonica grandiosa Iredale, 1931Architectonica gualtierii Bieler, 1993Architectonica karsteni Rutsch, 1934Architectonica laevigata (Lamarck)Architectonica maculata (Link, 1807)Architectonica maxima (Philippi, 1849)Architectonica modesta (Philippi, 1848)Architectonica nobilis Röding, 1798 - common sundialArchitectonica perdix (Hinds, 1844)Architectonica perspectiva (Linnaeus, 1758)Architectonica proestleri Alf & Kreipl, 2001Architectonica purpurata (Hinds, 1844)Architectonica stellata (Philippi, 1849)Architectonica taylori (Hanley, 1862)Architectonica trochlearis (Hinds, 1844)The Indo-Pacific Molluscan Database also includes the following names in current use
Architectonica bairdii (Sowerby, 1866)Architectonica biangulatum (Gray, 1826)Architectonica impressum (Nevill, 1869)Architectonica (maxima-group) Bieler, 1993Architectonica (perspectiva-group) Bieler, 1993Architectonica (Adelphotectonica) kuroharai(Kuroda & Habe in Habe, 1961-a)Species in the genus Architectonica include:
Species brought into synonymy
Architectonica gothica Röding, 1798: synonym of Heliacus (Grandeliacus) stramineus (Gmelin, 1791)Architectonica granulata (Lamarck, 1816): synonym of Architectonica nobilis Röding, 1798Architectonica kuroharai Kuroda & Habe in Habe, 1961: synonym of Adelphotectonica kuroharai (Kuroda & Habe in Habe, 1961)Architectonica nomotoi Kosuge, 1979: synonym of Adelphotectonica nomotoi (Kosuge, 1979)Architectonica offlexa Iredale, 1931: synonym of Adelphotectonica reevei (Hanley, 1862)Architectonica pentacyclota Azuma, 1973: synonym of Adelphotectonica kuroharai (Kuroda & Habe in Habe, 1961)Architectonica picta (Philippi, 1849): synonym of Architectonica maculata (Link, 1807)Architectonica placentalis (Hinds, 1844): synonym of Discotectonica placentalis (Hinds, 1844)† Architectonica pseudoperspectiva (Brocchi, 1814): synonym of † Discotectonica pseudoperspective (Brocchi, 1814)Architectonica radialis Dall, 1908: synonym of Solatisonax radialis (Dall, 1908)Architectonica radiata Röding, 1798: synonym of Psilaxis radiatus (Röding, 1798)Architectonica reevei (Hanley, 1862): synonym of Adelphotectonica reevei (Hanley, 1862)Architectonica relata Iredale, 1936: synonym of Adelphotectonica reevei (Hanley, 1862)Architectonica sindermanni Merrill & Boss, 1984: synonym of Adelphotectonica uruguaya (Carcelles, 1953)Architectonica sunderlandi Petuch, 1987: synonym of Adelphotectonica uruguaya (Carcelles, 1953)Architectonica valenciennesii Mörch, 1859: synonym of Architectonica nobilis Röding, 1798Architectonica wroblewskyi Mörch, 1875: synonym of Architectonica nobilis Röding, 1798