How to Identify Trochidae

Key Identification Features

• The convex base of the shell features concentric ridges, which are larger around the umbilicus.
• This species shares a similar overall form with Phorcus turbinatus, but usually has more convex outlines along the spire.
• The columellar projection or tooth is positioned closer to the base than that of Phorcus turbinatus, and the distinct color patterns of Phorcus lineatus further separate the two species.
• The elevated spire is conical, and the sutures are distinctly impressed.

For instant identification in the field, use the iNature app — AI-powered, works offline.