Reticulidia halgerda Brunckhorst & Burn in Brunckhorst, 1990
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Reticulidia halgerda is characterized by numerous, narrow yellow
ridges and an orange mantle margin. Pretty similar is
Reticulidia fungia which
has fewer, large yellow ridges with a fine white border and a
broad blue-grey mantle margin.
More information on Reticulidia halgerda are on
Bill Rudman's Sea-Slug Forum!