Cyerce nigra
Bergh, 1871

Family: Caliphyllidae


Chuuk, Ueno, reef flat; 15mm long. 2 July 1973. Food unknown. PHOTO: Clay Carlson.

Described from Palau, this animal is usually considered a colour form of Cyerce nigricans. It differs in having a pattern of transverse stripes on the outside of the cerata rather than the spots of typical Cyerce nigricans. Both species have spots on the inside surface of the cerata. Another difference is that there is a thin black line then a broad yellowish band at the edge of the cerata in Cyerce nigra but in Cyerce nigricans there is a thin white line, then a broad black band, then the broad yellowish band.

See Clay Carlson's message below.

• Bergh, L.S.R. (1870). Malacologische Untersuchungen. In: C.G. Semper, Reisen im Archipel der Philippinen, Wissenschaftliche Resultate. Band 2, Heft 1: 1-30, Pls. 1-8.

Authorship details
Rudman, W.B., 1999 (July 6) Cyerce nigra Bergh, 1871. [In] Sea Slug Forum. Australian Museum, Sydney. Available from

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