Literature
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- Step, E. 1927. Shell life. 421 pp. Frederick Warne & Co., LTD, London.
- Thompson, T.E. & G.H. Brown, 1976/1984. Biology of Opisthobranch Molluscs, volume I and II. Ray Society. London. .
- Thompson, T.E. 1988. Molluscs: Benthic Opisthobranchs (Mollusca: Gastropoda). Synopses of the British fauna (NS), 8: 1-356.