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This species is part of the 'Coryphellina rubrolineata look-alike' complex:
Pretty similar are
Coryphellina rubrolineata, which differs by the orange colour of the rhinophores, and
Coryphellina delicata, which lacks the purple longitudinal lines.
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.
The picture #7 was posted on 9 June 2003 at these websites as Flabellina rubrolineata (O’Donoghue, 1929) [Coryphellina], and changed
on 12 December 2017 into Coryphellina rubrolineata O'Donoghue, 1929.
Korshunova et al. (2017) reinstated the genus Coryphellina O'Donoghue, 1929 within the family Flabellinidae Bergh, 1889, and had on Fig. 39 as Coryphellina rubrolineata O'Donoghue, 1929 a pale pink specimen with pale pink cerata, which have a diffuse red subapical ring, and below some whitish pigment, the apices are yellowish/pink.
I changed it again on 12 March 2020 into Coryphellina sp. 04 Genus: O'Donoghue, 1929 because the rhinophores differ.
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
How to cite:
Köhler, E. (2020), published 12 March 2020, Coryphellina sp. 04 Genus: O'Donoghue, 1929
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Coryphellina_sp_04.htm