Photos of Cyerce

July 8, 1999
From: Clay Carlson

Here are a couple of elderly Cyerce shots. Both were doctored up quite a few years ago for use as Xmas cards. We have a number of polybranchs but have not done much with the limited literature we have on the beasts.

UPPER: Cyerce nigricans Pease, 1866), 22mm; Guam, Bile Bay, reef flat; 2 April 1971. Host: Chlorodesmis fastigiata
[Bergh named this species Cyerce nigra var. ocellata Bergh, 1873; Samoa]

LOWER: Cyerce nigra Bergh, 1871, 15mm. Chuuk, Ueno, reef flat; 2 July 1973. Host: ?


Carlson, C. & Hoff, P.J., 1999 (Jul 8) Photos of Cyerce. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Clay,
Thanks very much for the photos. They may be old but they are better than mine. I've decide to keep Cyerce nigricans and Cyerce nigra separate. I am not sure they are distinct, but the colour differences are quite large, and keeping them separate may stimulate discussion.
Best wishes,
Bill Rudman.

Rudman, W.B., 1999 (Jul 8). Comment on Photos of Cyerce by Clay Carlson . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Cyerce nigra

Related messages

  1. Cyerce nigra from Milne Bay, Papua New Guinea
    From: Clinton Bauder, July 6, 2007
  2. Cyerce nigra and C. nigricans – swimming behaviour
    From: Julie Marshall, December 5, 2001
  3. Cyerce nigra & C. nigricans
    From: C.Carlson & P.J.Hoff , April 11, 2000

Show factsheet and all related messages