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Halgerda tessellata (Bergh, 1880) [Dictydoris]

Click the thumbnail photos to enhance!

Halgerda tessellata is characterized by the pattern of yellowish-brown-orange flattened ridges over the mantle, the spaces in between are dark brown with opaque white spots.
The above pictures show the colour variants of the ridges in this species, ranging from thin orange to broad orange-red. This specimen is upon its egg mass. I have seen specimens at the Maldive Islands with broad pale orange ridges, which are now a distinct species: Halgerda indotessellata  Tibiriçá, Pola & Cervera, 2018.
More information on Halgerda tessellata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2020), published 28 May 2020, Halgerda tessellata (Bergh, 1880)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Halgerda_tessellata.htm

 
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