At present known from Tanzania and northeastern South Africa.
Dar es Salaam, Tanzania, 8, 12mm long alive, November, 1976. PHOTO: Bill Rudman.
This white species is characterised by a red outer line and a yellow-orange inner line at the mantle edge. about midway down the mantle on each side there is a thicker reddish purple patch which gives the body a "waist". The 'hour-glass' appearance of the mantle gave me the idea of horologia (= clock) for its species name.
•Rudman, W.B. (1984) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: a review of the genera. Zoological Journal of the Linnean Society 81: 115-273.
•Rudman, W.B. (1985) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris aureomarginata, C. verrieri and C. fidelis colour groups. Zoological Journal of the Linnean Society, 83: 241-299.
•Gosliner, T. (1987) Nudibranchs of Southern Africa. A guide to opisthobranch molluscs of Southern Africa. California: Sea Challengers & Jeff Hamann.
Rudman, W.B., 1998 (November 11) Thorunna horologia Rudman, 1984. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/thorhoro
Thorunna horologia from the Andaman Sea
From: Lawrence Neal, April 19, 2010
Thorunna horologia and friends?
From: Valda Fraser, February 16, 2009
Re: Thorunna horologia from Reunion island
From: Sully Bachel, February 6, 2009
Thorunna horologia from Reunion island
From: Philibert Bidgrain, June 17, 2005
Thorunna horologia from Sodwana Bay
From: Colin Ogden, June 9, 2005
Thorunna horologia from South Africa
From: Valda Fraser, April 18, 2000
Thorunna horologica in South Africa
From: Terry Gosliner, November 18, 1998