Stromboidea

• Aporrhaidae
  • Helicaulax
    • Helicaulax formosa Stephenson, 1955

Helicaulax formosa in Sohl, pl. 11, fig 18, 19, 20, 24 and 25

• left under holotype
• image courtesy of the U.S. Geological Survey

References:

• Sohl, 1960