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It's not so difficult to distinguish the three "purple Flabellinas" which occur in this area but one must make sure the characteristic features are captured on the photo. Nevermind the white tips on the cerata: all 3 may have them. Flabellina pedata has almost smooth rhinophores and the cerata transparent cerata (the color is given by the digestive gland inside) grow directly from the body. Flabellina ischitana has conspicuous rings on the rhinophores and each ceratal cluster has a raised peduncle at the base from which the cerata grow. Flabellina affinis also has conspucuous rings on the rhinophores and also the peduncles on the ceratal clusters but the wall of the cerata has purple opaque pigment at the surface, usually more concentrated below the tip and sometimes even absent from the base of the cerata. There is also a recently described species, Piseinotecus soussi, which has a purple body but the cerata are covered with minute white specks and dots. Piseinotecus gaditanus also has a pink body (although much faded) but is very small and rare. Recent DNA studies have shown the above mentioned Flabellina spp. are more closely related to Piseinotecus gaditanus and Piseinotecus gabinierei than to other species of the same genus like Flabellina babai. The next revision of the Flabellinidae will probably change the genera of some of these species (if not all).
Finalmente después de mirar más fotos me parece que es Flabellina affinis.
Uf, las flabelinas son muy dificiles de clasificar..
creo que este no es una Flabellina affinis, porque tiene las puntas blancas. Lo he visto en una guía que tengo de flora y fauna del Mediterráneo, pero los dos se parecen mucho ¿que te parece? Además en la foto saltó el flash y es difícil de ver porque sale con demasiada luz
Spotted on Apr 30, 2011 Submitted on May 29, 2011
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