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Julia zebra  Kawaguti, 1981

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Julia zebra is a sacoglossan of the family Juliidae  E. A. Smith, 1885, which includes the "bivalved sea-slugs" of the genera - sorted by name:
- Berthelinia  Crosse, 1875,
- Edenttellina  Gatliff & Gabriel, 1911, which is now accepted as Berthelinia  Crosse, 1875,
- Julia  Gould, 1862,
- Midorigai  Burn, 1960, which is now accepted as Berthelinia  Crosse, 1875,
- Prasina  Deshayes, 1863, which is now accepted as Julia  Gould, 1862,
- Tamanovalva  Kawaguti & Baba, 1959, which is now accepted as Berthelinia  Crosse, 1875.
The family Juliidae  E. A. Smith, 1885 is unique among gastropod mollusks in having clam-like shells into which the body can be completely withdrawn. Let me quote the Sea Slugs of Hawaii web site of Cory Pittman and Pauline Fiene: "They were first described as bivalves from fossil material and only recognized as gastropods when living animals were discovered in 1959."
Julia zebra has a brownish-green shell with narrow, radiating, dark brown stripes and cloudy white patches. The animal is brownish-green flecked with white and with dark brown bands on top of its head.
More information on Julia zebra are on Bill Rudman's Sea-Slug Forum!