Julia thecaphora is a species of a sea snail with a shell comprising two separate hinged pieces or valves. It is a marine gastropod mollusk in the family Juliidae.
Distribution The type locality for this species is probably Mazatlán, Mexico.Jensen K. R. (November 2007). "Biogeography of the Sacoglossa (Mollusca, Opisthobranchia)" . Bonner zoologische Beiträge 55(2006)(3-4): 255–281.
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