Throughout Japan from Hokkaido to Kyushu. Possibly also in Australia.
Japan (Kii Peninsula east coast), Depth: 3m, Length: 6mm. Jan. 2000. PHOTOS: Yasuhiro Shirai.
Whole upper body surface except for anterior edge of head, eye-regions and border of foot is black or heavily dusted with black specks. The tip of the rod-like rhinophores are whitish. The branchia papillae (cerata) are blackish with a yellowish-brown (or orange-brown) cap with white specks at the tip - In rare cases there is no brown pigmentation. The anterior end of the foot is rounded which differentitaes this species from Stiliger formicarius, a similar shaped and coloured sacoglossan. It is usually found in the upper levels of the intertidal zone on green algae, such as Cladophora, Enteromorpha, Boodlea and Ulva.
See Ercolania cf. boodleae from southern Australia which is almost certainly the same species.
• Baba,K. (1938) Opisthobranchia of Kii, Middle Japan. Journal of the Department of Agriculture, Kyusyu Imperial University, 6(1): 1-19.
• Baba, K. & Hamatani, I. (1970) The anatomy of Ercolania boodleae (Baba, 1938) from Seto, Kii, Middle Japan (Opisthobranchia: Sacoglossa). Publications of the Seto Marine Biological Laboratory, 18(4):215-222.
Rudman, W.B., 2000 (February 11) Ercolania boodleae (Baba, 1938). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/ercobood
Pacific Russian Ercolania boodleae
From: A. V. Chernyshev & A.V. Ratnikov, April 14, 2005
Re: Ercolania boodleae? on Valonia
From: Kathe R. Jensen, May 25, 2000
Food of Ercolania boodleae
From: Yasuhiro Shirai, March 20, 2000
Ercolania boodleae? on Valonia
From: Yasuhiro Shirai, March 4, 2000
Re: Ercolania boodleae from Japan
From: Yasuhiro Shirai, February 18, 2000
Ercolania boodleae? from Japan
From: Yasuhiro Shirai, February 14, 2000