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Although the two ventral hypothecal plates of Sinophysis ebriolum were described by BALECH ( 1956), the type of their arrangement is uncertain, because his drawings of the plate pattern in an intact state are least accurate.So far as concerned with his description and drawings, Sinophysis ebriolum seems to be a valid member of Dinophysidae.
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Tohru Abe (1967) studied this question.
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