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Doto koenneckeri

Lemche, 1976

Tony Gilbert To me this looks like a Coryphella browni, the cerata tips have white rings just below them (and not covering the whole tip), and no blue tinges, so didn't think it was F. bostoniensis. Animal was 1.5cm long if that. As you can see it appears to munching away quite happily at this hydroid. I think this one is Aglaophenia pluma, which I think Doto koenneckeri is specific to, and was found in the strong tidal streams of the Menai Straits. This food source for C. browni isn't its primary, so I thought it was interesting to see the image.

Torjus Haukvik To me, the rhinophores doesn't look like they're belonging ta a Flabellina. I also have the understanding that Facelina auriculata is supposed to have the blue tinges, not F. bostoniensis. Feel free to correct me if I'm wrong.. I would say Facelina bostoniensis..

Tony Gilbert Thanks Torjus. As I understand it, both F. bostoniensis and F. auriculata have blue tinges/irridescence, but F. bostoniensis has them to a lesser degree. I've images of both Facelinas and we see mostly F. auriculata in Menai Straits but also C. brownii, both are usually on Tubularias. The F. bostoniensis I've mostly seen are quite large anyway, so that doesn't help. I wondered whether F. bostiensis has white below the cerata tips, or whole of the cerata tip? I.e. Are the white just below the cerata tips diagnostic of a C. browni? Also F. bostoniensis is mostly found on Tubularia, so whether the nudi is C. or F. they are not usually on the hydroid I photographed with the nudi.

Torjus Haukvik You had me pull out some litterature now. My key uses the lamellaes as a character to separate between Facelina and Flabellina, and the blue irridescence to distinguish Facelina bostoniensis from F. auriculata. Although the description of F. bostoniensis states that it can display a blue irridescence in rar occations, the description of F. auriculata states that this allway has blue irridescence. But, my book is quite old, so I'm not going to say anything for certain. About the coloration on the cerata tips in the Flabellina genus, I'm not your guy..! ;)

Tony Gilbert You've solved the nudi ID anyway, thanks! I also had another look at both, and checked a second picture I took. This first picture does show some red around the mouth area, and very long oral tentacles. The second picture, which I didn't post, is a head shot and clearly shows white pigment on the head between the rhinophores. So, I think you were right that it is F. bostoniensis, which is great, cos its my first one in the Straits (I think). So, the cerata tip colouration below the tips isn't diagnostic of C. browni. And, this nudi (F. bostoniensis) is not eating Tubularia or Clava.

Brendan Oonk F.bostoniensis indeed. Although it prefers Tubularia as it's food. It is know to eat all kinds of hydroids and even other nudibranchs

Tony Gilbert Thanks all.

Message posted on NE Atlantic Nudibranchs on 20 Jun 2012
John de Jong Here the spawn is visible, Bernard Picton. D. coronata?

Bernard Picton The point is that what we call Doto coronata may actually be a group of species and not a single species. There are small differences between the animals on different hydroids and these may indicate that there are several undescribed species. In 1976 Henning Lemche decided that these differences were species level, and split Doto coronata into several species, including Doto dunnei, Doto maculata, Doto eireana and Doto koenneckeri. I was able to go out and observe the differences he had found by targeting the hydroids he'd associated with these animals.

Message posted on NE Atlantic Nudibranchs on 26 Feb 2012
Cláudio Brandão Here is a Doto koenneckeri (almost sure) that was caught in a plankton mesh in Ria de Aveiro. Luckily it is healthy and will be released tomorow! =)

Message posted on NE Atlantic Nudibranchs on 20 Mar 2012
João Pedro Silva No clue yet. Coult it be Doto hydrallmaniae?

Sarah Bowen It's not on Hydrallmania falcata, though, is it? It looks more like Aglaophenia with those bronze coloured stems, and is there the suspicion of a lateral line down the body? That might suggest Doto koenneckeri (but confess have never seen that one myself!)

João Pedro Silva I don't know if it's A. pluma with all those ramifications of the main stem. Anyway, these were shot in vitro and there were many different hydroids on the tray... and many different Doto, usually only seen when they fell to the bottom of the tray. Here are some D. koenneckeri I photographed in February on A. pluma: http://www.flickr.com/photos/jpsilva1971/6852336349/in/set-72157629416374379/

Sarah Bowen So what you're saying is it might have crawled off something else!!! And the second picture looks very different. Oh, I give up! I do love Dotos though...

João Pedro Silva Yes, I know for sure there was another one completely different which wasn't on that hydroid (yet I don't know on which one it was): http://www.flickr.com/photos/jpsilva1971/7618381650/in/set-72157629416374379/

João Pedro Silva Also here: http://www.flickr.com/photos/jpsilva1971/7618390288/in/set-72157629416374379/

Ian Smith Hi Joao Your possible D. hydrallmania looks more like the D. koenneckeri I found in Wales than your D. koenneckeri pictures. Both look as if related to D. koenneckeri, but with differences from my images. Mine accord with Thompson & Brown Biol Opisth. Moll. 2 and with Bernard Picton's image.

Ian Smith sorry - I haven't got use to the facebook controls yet. I pressed return before putting a link to my images. Here it is http://www.conchsoc.org/spaccount/Doto-koenneckeri Cheers Ian Smith

Carissa Shipman working on these for my Masters. Gotta love the crypticness.

Message posted on NE Atlantic Nudibranchs on 24 Jul 2012
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
               Dexiarchia (Infraorder)
                Dotidae (Family)
                  Doto (Genus)
                    Doto koenneckeri (Species)
Associated Species