Cervera J.L., Gosliner T.M., García-Gómez J.C. & Ortea J.A. (2000). 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. Journal of Molluscan Studies. 66(3): 301-311. 0 species