basis of record Harms, J. (1993). Check list of species (algae, invertebrates and vertebrates) found in the vicinity of the island of Helgoland (North Sea, German Bight): a review of recent records. Helgol. Meeresunters. 47: 1-34 (look up in IMIS) [details]
additional source Huber M. (2010) Compendium of bivalves. A full-color guide to 3,300 of the world’s marine bivalves. A status on Bivalvia after 250 years of research.
Hackenheim: ConchBooks. 901 pp., 1 CD-ROM.
(look up in IMIS) [details]