Limapontia senestra (Quatrefages, 1844)
Author & date of last revision: Ian Smith on 31 March 2013
Cenia cocksii Alder & Hancock, 1848; Acteonia senestra Quatrefages, 1844; Cenia corrugata Alder & Hancock, 1848;
Body (excluding appendages)
Periphery of foot dorsally translucent white with opaque white marks . Sole  translucent pale showing orange ovotestis spheroids, dark green digestive gland and dorsal peripheral white marks. No propodial tentacles or extensions, but anterior of foot slightly swollen laterally and concave centrally. Metapodium pale dorsally.
Key identification features
Ecology and behaviour
On its foodplants, Cladophora spp.  in shaded positions and in rock pools. Sheltered lagoons to extremely exposed coasts. All tide levels, including pools of varying salinity at MHWS on exposed coasts. Strands of Cladophora lack cell walls; divided by cross walls into large compartments. Terminal compartments individually emptied of protoplasm by piercing and suction of L. senestra . Hermaphrodite. Vaginal opening closed by bursa copulatrix; often visible as swelling on right side of body . Impregnation of partner by piercing of hypodermic sharp style on end of penis (Gascoigne, 1976). Spawn; February – September . Egg mass contains up to 40 ova; unusually small number, but the largest eggs (diameter 0.4mm) on record, for any opisthobranch . No veliger larval stage; miniature adults hatch from eggs. Only European opisthobranch, apart from Runcina coronata, to have no trace of a shell at any stage of its embryonic development (Thompson, 1976).