Newtoniellidae – Eumetulinae: Socienna apicicosta (May, 1920) (‘ribbed-apex false-creeper’)
Synonym(s): apicicosta May, 1920.
Typical shell-length 4.0 mm. Lives subtidally amongst sponges. Native. Endemic to southeastern and southwestern Australia (TAS, VIC, SA and WA).
Subclass: Caenogastropoda – Sorbeoconcha
Order: Hypsogastropoda – Littorinimorpha