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The name violacea is Latin for violet, referring to the intense purple body colour that ornaments the body, gill and rhinophores of this species.
Pretty similar are:
Hypselodoris variobranchia which differs by the orange colour of the gills, and by the orange rhinophore clubs
Hypselodoris bullockii which differs by the pale pinkish background colour, by the thin white marginal band, and by the orange rhinophore clubs
Hypselodoris apolegma which differs by the reticulate white edging of the mantle, and by the orange rhinophore clubs and gills
Thorunna halourga which differs by the pale lilac backgroud colour, by the orange rhinophore clubs, and by the low gill pocket.
This species was posted on 29 May 2014 at these websites as Hypselodoris sp. 10 Genus: Stimpson, 1855 and has recently been desribed in Epstein et al. (2018).
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 22 September 2018, Hypselodoris violacea Gosliner & R.F. Johnson, 2018
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Hypselodoris_violacea.htm