Knoutsodonta sparsa (Alder & Hancock, 1846)

Onchidoris sparsa (Alder & Hancock, 1846)

Onchidoris sparsa and spawn on the food organism; the colonial bryozoan, Cellepora pumicosa. Possibly, first recorded spawn of the species. Sublittoral, 6 to 10m depth, Macduff, N.E. Scotland. 19th August 2017. Leg. Chris Rickard.

Submitted by Ian Smith on Tue, 22/08/2017 19:54
Photographer / copyright holder
Chris Rickard

Thompson & Brown (1984) stated, “Details of the reproductive cycle are unknown.” This image may be of the first recorded spawn of the species.

Onchidoris sparsa. 7.5mm (longer when extended). 1: Ground colour pinkish, seen in lines dissecting brown pigment. 2: Pale lines alternate with dark blocks around periphery. Click “View image details” for 3 –8.

Submitted by Ian Smith on Mon, 02/01/2012 20:14
Photographer / copyright holder
I.F. Smith
3: Pale tubercles coated translucent grey-brown, appear as pale spots outlined in grey on dorsum when viewed from directly above. 4: Lamellae on rhinophores dark, thick and widely spaced.