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Hypselodoris iba  Gosliner & R.F. Johnson, 2018

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Hypselodoris iba comes along in two distinct colour morphs, the first colour morph (pictures #7 and #8) has a bluish/violet background colour and a white marginal band, let me quote Epstein et al. (2018): "Second morph generally off-white to beige, with thin white marginal band, transitioning to orange anteriorly and posteriorly. Submarginal blood red band may be present, transitioning to purple anteriorly. Blood red blotches present on central region of notum, on base of gill pocket and base of rhinophore sheaths. purple band present near opening of rhinophore sheaths. Blood red blotches may also be present on lateral faces of body. Wide purple band present along lateral margin of foot."
Both colour morphs have orange rhinophore clubs, the white morph has orange gills, the bluish morph has bluish gills with orange pigment.
Etymology: Hypselodoris iba is named for the Tagalog word iba, meaning different or distinctive.
This picture shows the two colour morphs mating.
The white morph was identified by Terrence M. Gosliner. Thanks!
Terry wrote in November 2003 he is working on it with his student Rebecca Johnson. 15 years later was the description published...
The white morph is as Hypselodoris sp. 10 in IPN at page 269, it was posted on 15 December 2003 at these websites
as Hypselodoris sp. A  Genus: Stimpson, 1855, and changed on 15 August 2011 into Hypselodoris sp. 01  Genus: Stimpson, 1855.
For some genera, such as Trinchesia was the alphabet almost through. I had to change the distinguishing alphabetic character into a number.
I had chosen 2-digit numbers, even though '01' looks a little bit stupid, and now is only the genus italic written.
I changed it on 23 September 2018 into Hypselodoris iba  Gosliner & R.F. Johnson, 2018.
References:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
Epstein, H. E.; Hallas, J. M.; Johnson, R. F.; Lopez, A.; Gosliner, T. M. (2018). Reading between the lines: revealing cryptic species diversity and colour patterns in Hypselodoris nudibranchs (Mollusca: Heterobranchia: Chromodorididae).
Zoological Journal of the Linnean Society. 2018, XX, 1–74. With 40 figures., available online at https://doi.org/10.1093/zoolinnean/zly048
How to cite:
Köhler, E. (2018), published 23 September 2018, Hypselodoris iba  Gosliner & R.F. Johnson, 2018
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Hypselodoris_iba.htm

 
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