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Doto fragilis
(Forbes, 1838)
Erling Svensen Could there be any other options than Doto fragilis for this one? 2 cm long, 20 meter, Egersund, South Norway.
Christian Skauge I think not ;-)
João Pedro Silva A stuffed D. fragilis!
Erling Svensen If not, any other options? It is not D. lemchei, as there are not any Brown mottling on the back, and neither the hystrix, so?
Brendan Oonk Why would it be anything else than D. fragilis?
Christian Skauge He just wishes :-D
Bernard Picton This could be the one I call the giant form of Doto fragilis. I'm expecting Doto fragilis to turn out to be several species. They certainly look subtly different on different hydroids.
Erling Svensen Could there be any other options than Doto fragilis for this one? 2 cm long, 20 meter, Egersund, South Norway.
Christian Skauge I think not ;-)
João Pedro Silva A stuffed D. fragilis!
Erling Svensen If not, any other options? It is not D. lemchei, as there are not any Brown mottling on the back, and neither the hystrix, so?
Brendan Oonk Why would it be anything else than D. fragilis?
Christian Skauge He just wishes :-D
Bernard Picton This could be the one I call the giant form of Doto fragilis. I'm expecting Doto fragilis to turn out to be several species. They certainly look subtly different on different hydroids.
Richard Yorke Hopefully I am right in thinking this is a Eubranchus tricolor above a Doto fragilis on Nemertisia. Seen in Loch Carron a couple of days ago.
Peter H van Bragt you are right indeed
Richard Yorke Thanks for the confirmation.
Richard Yorke More pictures from this trip can now be seen at http://www.richardy.co.uk/Orkney13/index.html
Terry GriffithsDoto fragilis Just starting to get large numbers breeding around the Plymouth area
Tamsyn MAnn Nice one! Not seen that one... I think that's the one I've nicknamed the cauliflour one!!
Bernard PictonDoto fragilis is an entity which I strongly suspect of being more than one species. I call this one the "giant form" as it grows larger than ones on other hydroids. I think the hydroid in this case is Halecium muricatum. Nice photo Terry! Note also the extra large rhinophore sheaths and the raised tubercles on the back.
Kirstie Harris Found this chap on a site in Pembrokeshire over the weekend. Can anyone tell me what it is? Thanks.
João Pedro Silva Really need some more detail, but I think there are only 3 possibilities * in your area: Doto fragilis, Doto pinnatifida and Lomanotus marmoratus.
My guess is D. pinnatifida.
* feeding on Nemertesia antennina
Kirstie Harris Thanks! My husband took some photos too, so he might have a better one. If he has, I'll ask him to post it.
Terry Griffiths I would go for D. pinnatifida
Klas Malmberg Aquatilis D. pinnatifida - black tipped tubercles both on cerata and on the sides of the body
João Pedro Silva After downloading and enhancing the image, no doubt on my first guess.
Erling Svensen And this one, Doto lemchei? 1 cm specie from Gulen, Norway.
Bernard Picton Not Doto lemchei, but one of the Doto fragilis complex. Interesting lobed rhinophore sheaths on this one, which might be important, Doto cuspidata and Doto crassicornis have this character.
Erling Svensen Ok, Bernard, I call him Doto cuspidata var. Svensiensis
Bernard Picton var. svenseni - -ensis is for places so gulenensis...
Klas Malmberg Aquatilis This picture is from Gulen 2010. What is it? It looks like Doto hystrix whith its spotted white pigment and spiky tubercles but it is lacking the typical spiky sheats around the rhinofores. So... we all want to know what it could be.
Bernard Picton I think there are a group of Doto fragilis look-alikes. When Greg Brown and I described Doto hystrix we were concerned about whether it was really distinct from Doto fragilis. Only repeated finds associated with a single hydroid food finally convinced us that the spiky nature of the ceratal tubercles and the spiky rhinophore sheaths were sufficient characters to describe it. Since then I've seen it many times and I can easily say that this is not Doto hystrix. We really need a lot of observations of the other Doto species which have previously been reported from Scandinavia to rule out a few other names.
Klas Malmberg Aquatilis Really interesting, thank you Bernard. I think we have to collect a couple and try to make a DNA sample.
Terry GriffithsDoto fragilis Just starting to get large numbers breeding around the Plymouth area
Tamsyn MAnn Nice one! Not seen that one... I think that's the one I've nicknamed the cauliflour one!!
Bernard PictonDoto fragilis is an entity which I strongly suspect of being more than one species. I call this one the "giant form" as it grows larger than ones on other hydroids. I think the hydroid in this case is Halecium muricatum. Nice photo Terry! Note also the extra large rhinophore sheaths and the raised tubercles on the back.
Samantha Varns A few of my own pics species clarification would be appreciated xxx
João Pedro Silva This one is definitelly Limacia clavigera: https://www.facebook.com/photo.php?fbid=10152911946985641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro Silva Not much detail but the arrangement of the cerata makes me think it's probably Flabellina ischitana: https://www.facebook.com/photo.php?fbid=10152911938905641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaDoto fragilis: https://www.facebook.com/photo.php?fbid=10152911989860641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaLimacia clavigera: https://www.facebook.com/photo.php?fbid=10152911481875641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFlabellina pedata: https://www.facebook.com/photo.php?fbid=10152911490070641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFlabellina affinis: https://www.facebook.com/photo.php?fbid=10152911497540641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro Silva Not really clear but appears to be Calmella cavolini: https://www.facebook.com/photo.php?fbid=10152911499990641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaCratena peregrina: https://www.facebook.com/photo.php?fbid=10152911508385641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaCrimora papillata: https://www.facebook.com/photo.php?fbid=10152911523160641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFacelina auriculata: https://www.facebook.com/photo.php?fbid=10152911530580641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFacelina annulicornis: https://www.facebook.com/photo.php?fbid=10152911566780641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFlabellina affinis: https://www.facebook.com/photo.php?fbid=10152911929510641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaCratena peregrina: https://www.facebook.com/photo.php?fbid=10152911931670641&set=a.10152911481660641.1073741835.589765640&type=3&theater
João Pedro SilvaFlabellina affinis: https://www.facebook.com/photo.php?fbid=10152911935540641&set=a.10152911481660641.1073741835.589765640&type=3&theater
Ian Smith I hope Joao gets those kisses now for his effort ;-0
João Pedro Silva I decided not to identify those from "Africa" because I don't know if they're from the Mediterranean, the Atlantic or the Indian ocean.
Samantha Varns Xxx kisses an thank you xxx
João Pedro Silva Samantha Varns, next time you could allow comments on the album as it makes it a lot easier :)
Samantha Varns Sorry didn't realised it was blocked
Bernard Picton Could you add countries to the African ones?
Samantha Varns Easy they were all in Kenya diving off from mombassa the beach was Diana beach :-) xxx
Bjørnar Nygård João Pedro Silva, the nudibranch in question might have been on the hydroid Kirchenpaueria pinnata, but I'm not sure.
João Pedro SilvaDoto dunnei, I think.
Bjørnar Nygård Ok, thanks. I've collected the specimen and will send it to Jussi Evertsen.
Carissa Shipman So kool! Completely new!
Bernard Picton The shape of the tubercles is different to D. dunnei in my opinion. Trouble is the hydroid taxonomy isn't robust either plus some hydroids certainly support more than one species of Doto. Nemertesia species are particularly interesting, with Doto fragilis eating two species of Nemertesia, Doto pinnatifida one of these and Doto cuspidata the other.
Jim Anderson Doto sp. but which one?
6 mm animals with spawn at 14 m, Loch Fyne, Scotland - 31 May 2013
Jim Anderson Anyone like to try to ID please?
Klas Malmberg Aquatilis I have pictures that are similar and would also like to know what specie...
Bernard Picton I'd put it in the Doto fragilis complex...
Jim Anderson Thanks Bernard - I particularly like the use of 'complex'!
Jim Anderson Bernard Picton - Looking at these again I wonder whether they might be a colour form of Doto hystrix. I am looking particularly at the 'pointiness' of the tubercules and the pink spawn.
Bernard Picton I thought the spawn looked different to any named Doto. We had some 'not quite right' animals which were identified as D. hystrix in Norway and I am now treating these brown non-marked ones with suspicion.
Jim Anderson The spawn was similar in colour, but a touch pinker, to that seen with D. hystrix here.
http://www.nudibranch.org/Scottish%20Nudibranchs/html/doto-hystrix-01.html
Jussi Evertsen Our Norwegian "hystrix" turned out to be "fragilis", but then again our "fragilis" can be more than one species ... Doto's can be near impossible to ID from photos alone and we need to work out clear characters that can be used to distinguish between the species
Klas Malmberg Aquatilis Thank You Jussi Evertsen It`s always good to get as much information as possible in these special nudies
Christian Skauge Finally - the report from the 2012 Nudibranch Safari at Gulen Dive Resort. Lots of images - go have a look :-)
Klas Malmberg Aquatilis Looking good!
Bernard Picton Nice Christian, but I don't think that is Doto hystrix! I think it's something I've never seen, but I'm wondering about Doto crassicornis...
Jussi Evertsen Large individuals fit the description for Doto hystrix, the really small ones had less prominent characters, but all had tubercles also on the back. Doto crassicornis is something else.
Klas Malmberg Aquatilis I am very interested in this discussion. Doto hystrix or crassicornis... Spiky cerata but not really spiky sheats, more vavy sheats, what could this be?
Bernard Picton Jussi, I'd really like to see photographs of Doto crassicornis, as I've never seen it. Lemche also illustrates a specimen as Doto cuspidata which looks like this, but is not the same as the thing we are calling D. cuspidata in Britain and Ireland.
Jussi Evertsen Christian has all the photos. Doto cuspidata as by Lemche differs from eg descriptions in Thompson & Brown. I after that there is somekind of transition between Doto fragilis to crassicornis to the small ind of hystrix.
Christian Skauge I'll try to get the photos posted as soon as possible... But there are unfortunately not too many. But you guys collected some, didn't you?
Torkild Bakken We collected specimens of Doto hystrix, as Jussi said they conformed well to the description in Thompson & Brown, we will have to wait for results. Doto crassicornis is on our list to check out. We have found some good specimens from near the type locality that we suspect may be the "real" one. But, a lot more work has to be done. Doto in Norwegian waters are more species than previously known, no doubt.
Bernard Picton Doto everywhere I think, not just Norwegian waters. Torkild Bakken, Are you keeping a sample of the hydroid you find them on? If you want a hand identifying the hydroids I can help - also I'll try and get round to putting up the different types I've seen on here.
