Lamellaria latens

Rudolf Svensen Is this Lamellaria latens ? Image captured South-West in Norway.

Egidio Trainito Lamellaria for sure

Ian Smith How long was it Rudolf? It resembles the L. perspicua at http://www.conchsoc.org/node/5705, but it was verified by extracting the shell as it had some similarity to latens. Yours looks a bit too tuberculate for latens, but I'm not sure. Size would help decide.

Rudolf Svensen Ian Smith I guess it was between 20 and 30 millimeter long.

Ian Smith In that case it's L. perspicua.

Paula Lightfoot This is not a nudibranch (sorry!) but it looks a lot like one...found on the wall of Gouliot Cave on Sark last week, 5mm long with a rough textured cream/brown mantle over an internal shell. I think it is either Lamellaria perspicua or Lamellaria latens, but can anyone tell me which one?

David Fenwick Snr Hi Paula, Hayward and Ryland describes L. latens as less domed in profile and from my observations on the shore I would say that this is true even for juvenile animals. From what I've seen at Hannafore, Spit Point and Marazion (Cornwall coast) juvenile L. latens are flatter than L. perspicua, with the latter being 'cowrie' shaped in profile. If I had to sort 5mm forms of these two on profile alone I would say that L. latens had a greater colour range. Hope this helps and hope others will agree.

Dan Bolt My third and final head-scratcher from today's snorkelling trip to Babbacombe. Probably not a Nudibranch but a mollusc with an internal shell maybe? Anyway, I've no idea what it is! 10mm long ish.

Christian Skauge Cute little thing! Could be a Pleurobranchus membranacea, but these things are a little hard to identify...

Dan Bolt @Christian, thank you again for the info :)

Bernard Picton This one isn't an Opisthobranch, but a Prosobranch. It's Lamellaria perspicua. They are very variable in colour and not easy to distinguish from Lamellaria latens, but in my experience L. latens has a different range of markings (as well as a slightly different (internal) shell.

Dan Bolt Thanks again Bernard!