Eubranchus rubropunctatus  Edmunds, 1969

Click the thumbnail photos to enhance!

Eubranchus rubropunctatus is characterized by papillae scattered over the rhinophores and some swollen cerata which are are huge for the size of the animal and have two tiers of tubercles and a bulbous tip. The apex of the cerata is clear, subapical is a yellowish-orange band followed by a blue band with dark red spots, followed by a yellowish band. The body and the appendages are transparent greyish, covered with small brownish-yellow spots and white spots.
This species is as Eubranchus mandapamensis in IPN at page 354, let me quote:"Eubranchus rubropunctatus is a synonym."
NUDIPIXEL writes "Eubranchus mandapamensis (Rao, 1968) Also known as: Eubranchus rubropunctatus, Eubranchus madapanamensis"
Bill Rudman: writes:
"See discussion [message #22443] as to whether this is a synonym of Eubranchus mandapamensis."
Very similar in the colour pattern are:
Eubranchus mandapamensis which differs by the spaced annulations on the rhinophores and
Eubranchus cf. mandapamensis (Rao, 1968) which has no spaced annulations on the rhinophores and
Eubranchus cf. rubropunctatus which differs by the smooth rhinophores
let me quote Bill Rudman:"While it is possible that one species could have this degree of rhinophoral variability I can't think of an example. At this stage I suggest we take a conservative approach and keep the three rhinophore types separate until we know more about the anatomy and variability of this species or group of species."
I will keep the specimens with papillae scattered over the rhinophores as Eubranchus rubropunctatus, and if there turns up a specimen with spaced annulations on the rhinophores, I will post this as Eubranchus mandapamensis!
On 15 July 2011 sent Gordon Tillen pictures of a specimen with annulate rhinophores and a similar colour pattern, I posted it as Eubranchus cf. mandapamensis (Rao, 1968).
Many phantastic shots of Eubranchus rubropunctatus are at Jun Imamoto's website umiushi,
and one more picture of a specimen with annulate rhinophores is at the umiushi-zukan website without information on the location.
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
More information on Eubranchus rubropunctatus are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2019), published 27 March 2019, Eubranchus rubropunctatus  Edmunds, 1969
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Eubranchus_rubropunctatus.htm


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