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Doto hystrix

Picton & Brown, 1981


Nils Aukan Is this Doto hystrix? Bratt√ły, Norway, 16.08-2013

Bernard Picton I think so...

Message posted on NE Atlantic Nudibranchs on 03 Sep 2013
Klas Malmberg Aquatilis And a gang of Dotos - but which ones?

Erling Svensen This must be Doto hystrix?

Erling Svensen http://www.habitas.org.uk/marinelife/index.html

Klas Malmberg Aquatilis Mmmm - also my thought before Jussi examined the picture and notised that the rhinofore sheats doesnt have the spikes that should bee there - so it must be something else?

Carissa Shipman Wow, these are amazing, I want some! I love their spiky cerata.

Message posted on NE Atlantic Nudibranchs on 29 Feb 2012
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.

Message posted on NE Atlantic Nudibranchs on 31 Mar 2012
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.

Message posted on NE Atlantic Nudibranchs on 31 Mar 2012
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

Message posted on NE Atlantic Nudibranchs on 01 Jun 2013
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.

Message posted on NE Atlantic Nudibranchs on 30 Mar 2012
Christian Skauge The Nudibranch Safari at Gulen Dive Resort is under way, with 8 early birds already here. 14-15 species found today, more updates and pics will be coming tomorrow :-)

Joshua Hallas would it be too much trouble to collect some adalaria loveni if you see any....

Klas Malmberg Aquatilis Waiting for pictures and uppdates... good luck to you all!

Jussi Evertsen We have published a species list at nudibranchia.no - one of the big surprises this year was Doto hystrix, a species fairly new to our waters

Message posted on NE Atlantic Nudibranchs on 20 Mar 2012
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
               Dexiarchia (Infraorder)
                Dotidae (Family)
                  Doto (Genus)
                    Doto hystrix (Species)
Associated Species