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It is characterized by the orange/red colour of the cerata, the specific name "from flamma (= flame, fire, Latin), referring to reddish-orange coloration of this species".
Pretty similar are:
Coryphellina sp. 01 which lacks the red/purple longitudinal lines on the body, and
Coryphellina sp. 03 which which differs by the colour of the cerata,
Coryphellina sp. 04 which which differs by the colour of the rhinophores,
Unidentia sp. 02 Genus: Millen & Hermosillo, 2012 which has smooth rhinophores, and
Unidentia sandramillenae which has a broad opaque white band at the smooth rhinophores,and
Unidentia sp. 03 Genus: Millen & Hermosillo, 2012 which differs by smooth rhinophores, which are basally bluish with a white outer half, the oral tentacles are of the same colour.
Unidentia cf. angelvaldesi which lacks the purple longitudinal lines.
This species was posted on 9 June 2003 at these websites as Flabellina rubrolineata (O’Donoghue, 1929) [Coryphellina],
Coryphellina rubrolineata was described by O'Donoghue (1929) from the Suez Canal, Red Sea and is restricted to the Northwestern Indian Ocean.
Korshunova et al. (2017) reinstated the genus Coryphellina O'Donoghue, 1929 within the family Flabellinidae Bergh, 1889,
and moved Flabellina rubrolineata (O’Donoghue, 1929) [Coryphellina] into the genus Coryphellina O'Donoghue, 1929.
I changed it on 12 December 2017 into Coryphellina rubrolineata O'Donoghue, 1929, I changed it again
on 30 April 2022 into Coryphellina flamma Ekimova, Deart, Antokhina, Mikhlina & Schepetov, 2022.
O’Donoghue CH (1929) Report on the Opisthobranchia. XXXVIII. Zoological results of the Cambridge Expedition to the Suez Canal, 1924.
Transactions of the Zoological Society of London 22: 713–841. https://doi.org/10.1111/j.1096-3642.1929.tb00212.x
Korshunova, T.; Martynov, A.; Bakken, T.; Evertsen, J.; Fletcher, K.; Mudianta, W.; Saito, H.; Lundin, K.; Schrödl, M.; Picton, B. (2017). Polyphyly of the traditional family Flabellinidae affects a major group of Nudibranchia: aeolidacean taxonomic reassessment with descriptions of several new families, genera, and species (Mollusca, Gastropoda).
ZooKeys. 717: 1-139., available online at https://doi.org/10.3897/zookeys.717.21885
Ekimova, I.; Deart, Y.; Antokhina, T.; Mikhlina, A.; Schepetov, D. (2022). Stripes Matter: Integrative Systematics of Coryphellina rubrolineata Species Complex (Gastropoda: Nudibranchia) from Vietnam.
Diversity. 14(4): 294., available online at https://doi.org/10.3390/d14040294.
How to cite:
Köhler, E. (2022), published 30 April 2022, Coryphellina flamma Ekimova, Deart, Antokhina, Mikhlina & Schepetov, 2022
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Coryphellina_flamma.htm