Rostanga bifurcata  Rudman & Avern, 1989

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Rostanga bifurcata has close packed caryophyllidia, like all species of the genus Rostanga, which gives it a spiculate texture. Most species of Rostanga are orange or red, and apparently take up colour pigments from their sponge food so that their colour exactly matches the sponge they are feeding on. Individual animals show a close resemblance to their food sponge. This means that colour can vary within a species quite considerably if the sponge they feed on is itself variable in colour, or if the species feeds on a number of species of sponge. External differences can be found in the shape of the rhinophores and in biological characteristics such as nature of egg mass, size of eggs, and food sponge.
Internally, the radular morphology is the most useful character.
The specimen #1 was identified by Dr. Richard Willan, thanks!
The specimens #2 - #6 were posted before at these websites as Discodorididae sp. 07  Family: Bergh, 1891,
I identified the specimen #2 on 28 April 2018, confirmed by Dr. Richard Willan, thanks!
The photographer Ilan Lubitz identified the specimens #7 and #8 as the South Australian Discodoris paroa  Burn, 1969, which is also orange with darker spots, Dr. Richard Willan, identified them as Rostanga bifurcata, thanks!
More information on Rostanga bifurcata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2020), published 16 December 2020, Rostanga bifurcata  Rudman & Avern, 1989
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Rostanga_bifurcata.htm


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