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It is characterized by highly branched pale tan gills with yellowish/greenish tips, and by a reticulate pattern of thin whitish-tan lines on the pale tan body- or a pale tan body with numerous small tan spots. The simple velar tentacles are short and thick.
Pretty similar are:
Marionia arborescens which differs by a greenish-brown body, and is densely covered with tubercles, each darker outlined, and
Marionia sp. 08 which is also densely covered with tubercles, each darker outlined.
Marionia sp. 13 which might be a colour variant, it differs by a diffuse whitish patch near the bases of the cerata.
Marionia sp. 23, which lacks the pale yellowish/greenish tips of the secondary gills.
Marionia sp. 15 which differs by whitish median tubercles.
How to cite:
Köhler, E. (2017), published 15 March 2018, Marionia sp. 10 Genus: Vayssière, 1877
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Marionia_sp_10.htm