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Hypselodoris yarae  Gosliner & R.F. Johnson, 2018

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Hypselodoris yarae is part of the Hypselodoris maculosa complex, distinctive is the broad orange marginal band.
It was described by Terrence M. Gosliner and Rebecca Fay Johnson in Epstein et al.(2018).
It was described from Mozambique and is as Hypselodoris sp. 1 in Gosliner et. al. (2015) page 253 top right from Kenya and as Hypselodoris sp. 4 in Gosliner et. al. (2015) page 255 top left, reported from Madagascar, Philippines, Marshall Is. Though the description states "Known only from Madagascar and Mozambique and possibly from Kenya (Gosliner et al., 2015: 252, upper right photograph), South Africa (Fraser, 1999), Sri Lanka (Houben, 2007) and the Red Sea (Poddubetskaia, 2003; Lederman, 2005)."
Bernard Picton writes on the above specimen at the facebook group NUDIBASE:"It's not identical to H. yarae, the colours are more intense and the white lines bolder. This is quite possibly just regional variation though and it is very similar to H. yarae. That's a good identification until someone studies the population of them in the Philippines and compares DNA and morphology for a number of individuals."
Let me quote Epstein et al.(2018):
"Etymology:
The name yarae honors Yara Tibiriçá, who has advanced our knowledge of western Indian Ocean nudibranchs and collected several specimens of this species.
External morphology: Living animals (Fig. 32) of moderate size, 20–35 mm in length. Entire dorsal surface light pink to tan, with thick orange band encircling the margin of notum. Marginal band often with undulating margins on inner side. Notum with series of narrow, opaque white longitudinal lines. Large plum to brown spots located between lines. Sides of body and margin of foot same colour as notum. Gill branches orange basally, with opaque white apices. Seven to nine unipinnate, well-elevated gill branches present on notum. Bulb of rhinophores opaque white, with two prominent orange bands and traces of third band basally. Base of rhinophores translucent white. Bulb with ~12–13 densely packed lamellae."
There are pictures of this species online from the Read Sea, and from Kenya.
Pretty similar are:
Hypselodoris maculosa which lacks the broad orange marginal band
Hypselodoris decorata which differs by a brownish or purple mantle margin, often undulating at the inner side,
Hypselodoris paradisa which lacks the broad orange marginal band, and haS a distinct V-Shaped reddish mark behind the rhinophores,
Thorunna australis which has a pale bluish or pink background colour, two longitudinal white lines, one on either side of the mantle and always one reddish band on the rhinophores,
References:
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
Bernard Picton (2019) comment at https://www.facebook.com/photo.php?fbid=10215260561609428
How to cite:
Köhler, E. (2019), published 15 September 2019, Hypselodoris yarae  Gosliner & R.F. Johnson, 2018
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Hypselodoris_yarae.htm

 
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