A new species of Berthella Blainville, 1824 (Opisthobranchia: Notaspidea) from the Canary Islands (Eastern Atlantic Ocean), with a re-examination of the phylogenetic relationships of the Notaspidea

1. Cervera, J.L.
2. Gosliner, T.M.
3. Garcia Gomez, J.C.
4. Ortea, J.A.