RT journal article T1 Unfinished symphony: updating the systematics of Aeolidiidae (Nudibranchia, Gastropoda), with special focus on Aeolidiella Bergh, 1867 A1 Carmona Barnosi, Leila A1 Martín-Hervás Santos, María del Rosario A1 Pola, Marta A1 Gosliner, Terrence M. A1 Cervera Currado, Juan Lucas A2 Biología K1 Aeolidiella K1 Aeolidiidae K1 Cladobranchia K1 Heterobranchia K1 marine biodiversity K1 molluscan diversity K1 morphology K1 new genera K1 new species K1 pseudocryptic species K1 sea slugs K1 systematics K1 taxonomy AB This paper updates the systematics of Aeolidiidae (Heterobranchia, Nudibranchia), with specialemphasis on the genus Aeolidiella Bergh, 1867. Up to now, Aeolidiella was composed of five validspecies: A. alderi, A. glauca, A. rubra, A. sanguinea from the Mediterranean Sea and the EasternAtlantic and A. drusilla comb. nov. from the Pacific Ocean. To clarify the systematics of thisgenus we present an integrative approach based on molecular and morphological data, literaturereview, species delimitation approaches, and haplotype network analysis. Aeolidiella glauca wasrecognized as a species complex resulting in the description of Aeolidiella avatar sp. nov.,whereas the nominal name A. rubra is considered nomem dubium. The species Aeolidielladrusilla comb. nov. is ascribed to the new genus Novaeolidiella gen. nov. together with thenew species Novaeolidiella janae sp. nov. from the Philippines. This restricts the genusAeolidiella to the Atlantic Ocean and Mediterranean Sea. PB CSIRO Publishing SN 1445-5226 YR 2026 FD 2026-04-02 LK http://hdl.handle.net/10498/39473 UL http://hdl.handle.net/10498/39473 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-nov-2026