Architectonica arcana

{{Short description|Species of gastropod}}

{{Speciesbox

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| taxon = Architectonica arcana

| authority = Bieler, 1993Bieler R. (1993). Architectonicidae of the Indo-Pacific (Mollusca, Gastropoda). Abhandlungen des Naturwissenschaftlichen Vereins in Hamburg. Abhandlungen Des Naturwissenschaftlichen Vereins in Hamburg. NF, 30: 1–376

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Architectonica arcana is a species of sea snail, a marine gastropod mollusk in the family Architectonicidae, which are known as the staircase shells or sundials.

{{Cite web

| url = https://www.marinespecies.org/aphia.php?p=taxdetails&id=585877

| title = Architectonica arcana Bieler

| website = The World Register of Marine Species

| access-date = 24 November 2024

}}