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Halgerda sp. 02  Genus: Bergh, 1880

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Halgerda sp. 02 is characterized by its translucent white colour with dark brown/black lines on the ridges and by its opaque white mantle rim.
This species is most likely as Halgerda sp. 3 in IPN, page 183.
Let me quote the description:"The uniform white color and black lines along the ridges immediately distinguishes this species. It has a few black spots and lines on the gill branches and a single black line on the rhinophores." and: "size 25 mm, Distribution: Known only from New Caledonia."
The above picture was taken during a tech dive at a depth of 70 m near Malapascua Island at Monad Shoal seamount.
The photographer Klaus Stiefel writes: "This is the largest nudibranch I ever saw, almost the size of a football."
that is ~27 cm, the size of this specimen is 10 times the size of IPN Halgerda sp. 3, which also differs by orange pigment at the gill pocket.
Reference:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp.
How to cite:
Köhler, E. (2020), published 28 May 2020, Halgerda sp. 02  Genus: Bergh, 1880
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Halgerda_sp_02.htm

 
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