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Very similar is Pseudocerotidae sp. 03 which differs by it's whitish granular appearance caused by minute opaque white spots, and lacks the thin white median line.
How to cite:
Köhler, E. (2018), published 13 November 2018, Maiazoon orsaki Newman & Cannon, 1996
available from https://www.Philippine-Sea-Slugs.com/Look-alike/Platyhelminthes/Maiazoon_orsaki/Select.htm