Description of a new northeastern Atlantic aeolid of the genus Flabellina (Mollusca, Nudibranchia)

• Autores: Manuel M. González-Duarte, Juan Lucas Cervera Currado, Marina Poddubetskaia
• Localización: Bulletin of Marine Science, ISSN 0007-4977, Vol. 82, Nº. 1, 2008, págs. 33-39
• Idioma: inglés
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• Resumen

  • A new species of aeolid nudibranch of the genus Flabellina Voigt, 1834 is described from the Bay of Arcachon (France), in the northeastern Atlantic. This species is cryptic of the aeolid Piseinotecus gaditanus Cervera, García and García, 1987. The external appearance is identical to P. gaditanus: body color is translucent white, ceratal surface transparent, digestive gland duct bright red and apex translucent white. The cerata arise from peduncles arranged in groups of five to seven, and opaque white spots are scattered all over the cerata surface. The radula is triseriate and the rachidian tooth has a triangular central cusp. The lateral radular teeth are smooth and the jaw masticatory border is denticulated with three rows of denticles. The reproductive system is very similar to that of P. gaditanus: the ampulla is large and rounded, the receptaculum is elongated, the prostate is short and relatively thick, and the penis is unarmed. The principal difference between the new species and P. gaditanus is that the first former has a triseriate radula, and the latter, a monoseriate radula.