May 1, 1999
From: Rie Nakano
Here are two more of Mr Atsushi Ono 's images from Kerama Island, near Okinawa which you offered to identify for us.
UPPER: from inner reef, Depth:5m, Length:3mm
LOWER: on the coral reef, Depth:7m, Length:30mm
firstname.lastname@example.orgNakano, R., 1999 (May 1) Species of Rostanga from Kerama Islands. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/814
I think these are probably two different species of Rostanga. Species of the genus are usually red or orange and have spiculate 'bristles' on their back. Some species, lie in the bottom picture have a few upright gills which form a closed cylinder. Often the rhinophore shape is a good way to distinguish species, but the only sure way is to look at the shape of the radular teeth..