(M. Sars, 1829)
North Atlantic. European and possibly North American coasts.
East coast of Denmark, near Kolding, Spring 2000. Photos: Peter van Bragt.
Body elongate, olive green with white or yellow tubercles and papillae. The lamellate rhinophores and the tripinnate gills are translucent in colour and number up to 5. The turbercles and frontal papillae are pale yellow. Whitish compound papillae are situated on either side of the branchial circlet as well as the median longitudinal, dorsal metapodial papillae.
See Bernard Picton's comments below about the confusion in the literature between this species and Palio nothus (Johnston, 1838).
• Sars, M. (1829) Bidrag til soedyrenes naturhistorie, Bergen, pt. 1, p. 1-59, pls. 1-6.
• Thompson,T.E. (1988) Molluscs: Benthic Opisthobranchs (Mollusca: Gastropoda). E.J.Brill / Dr W.Backhuys. 356pp.
Rudman, W.B., 2000 (September 17) Palio dubia (M. Sars, 1829). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/palidubi
Palio dubia from Puget Sound, Washington
From: Jan Kocian, April 21, 2006
German common name for Palio dubia
From: Dirk Schories, July 30, 2005
Palio dubia? from Norway
From: Robert Borzymek, July 10, 2003
Palio dubia from New England
From: Alan Shepard, July 14, 2002
Palio from Denmark is P. dubia
From: Bernard Picton, September 22, 2000
Re: Palio nothus from Denmark
From: Kathe R. Jensen, September 21, 2000
Palio nothus from Denmark
From: Peter H. van Bragt , September 20, 2000