Hypselodoris variobranchia

Hypselodoris variobranchia

"Hypselodoris variobranchia" is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Nudibranch - Hypselodoris variobranchia      Anilao,Batangas,Hypselodoris variobranchia,Nudibranch,Philippines

Appearance

"Hypselodoris variobranchia" has a deep purple body with a broad solid white border to the mantle. The bulb of the rhinophores is orange, with purple sheaths. The gills may be orange or deep purple. There is a tall gill pocket which is also deep purple in colour. This species has frequently been reported as "Hypselodoris bullocki".
This is a large nudibranch, reaching 50 mm in length.
Mating Nudis A pair of Nudibranch from the species Hypselodoris variobranchia.
This species was newly described in 2018 despite being photographed by underwater photographers for many years.  They looks similar to other species and thought to be variation until the recent publication, which also describe another similar looking species, Hypselodoris violacea as can be seen here :

https://www.jungledragon.com/image/96964/nudibranch_-_hypselodoris_violacea.html Hypselodoris variobranchia,Malaysia,Nudibranch,Sabah

Distribution

The holotype of this nudibranch was collected at 30 m depth from Aphol's Rock, Maricaban Island, Tingloy, Batangas Province, Luzon Island, Philippines,. It is a common and widespread species which has been reported from Queensland, Australia; Malaysia;Lau. A, 2006 [Message in] Sea Slug Forum. Australian Museum, Sydney. Indonesia and Okinawa, Japan but frequently mistaken for "Hypselodoris bullocki" or "Hypselodoris apolegma".

References:

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Taxonomy
KingdomAnimalia
DivisionMollusca
ClassGastropoda
OrderNudibranchia
FamilyChromodorididae
GenusHypselodoris
SpeciesH. variobranchia