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Aeolidiella glauca

(Alder & Hancock, 1845)


Tine Kinn Kvamme 2 x Aeolidiella glauca Drøbak, Norway 14 meters dept, approx 40 mm length.

Erling Svensen More frustating pictures from yesterday. This one? I think Aeolidiella glauca, but not sure?

Brendan Oonk That would be what I would call it.

Erling Svensen Thanks....

Ian Smith As the gap between the oral tentacles is about three times as wide as the thickness of a tentacle, the body lacks pigment freckling, the eyes are barely perceptible though the body is translucent, and the cnidosacs in the anterior cerata are not large, I wouldn't record this as A. glauca.

Erling Svensen If not A. glauca, what then?

Brendan Oonk Hi Ian, Here you can see a A.glauca, with a wide gap... http://www.diverosa.com/Nederland/Den%20Osse%20Catamaranhaven/CAT-080518%20Kleine%20vlokslak,%20Aeolidiella%20glauca%20met%20eisnoer.html So perhaps that's one more feature that will differentiate them "most of the time"

Ian Smith Hi Brendan, in fact that image by Rokus is also on the Conch Soc site (with his permission). You are right to raise it - I looked at it hard and long when I uploaded it. The tentacle becomes unclear after it has passed the edge of the foot and I can't make out where its base is, but I agree it certainly looks wide, and I'll have to accept the possibility of "most of the time", but I think it is useful in combination with clarity of eyes, large cnidosacs and mottling on the body "most of the time". I'm hoping to supply Lucas with specimens of the A. glauca from the Menai population for DNA sequencing but I need ethanol 96% urgently before my shore trip to low spring tide on 10th February. Can any one suggest a way I can get some?

Ian Smith Hi Erling, I'd say most of its features are nearer A. papillosa, but not typical. Maybe one of the new segregates??

Jim Anderson It looks like A. glauca to me

Message posted on NE Atlantic Nudibranchs on 28 Jan 2013
Rob Maller Found this colourful Aeolidiella glauca during today's dive in the dutch Lake Grevelingen; we don't often get to see them as bright orange as this one...

Tony Gilbert Thanks Rob, next time I dive Grevelingen Meer, I'll be sure to be looking for this. Was it near the reef balls at 12-15m or deeper?

Rob Maller Yes Tony... straight North from the entrance (Den Osse Kerkweg )to about 16-18mtrs...found a few going east from that point....near the left-overs of Tubelaria.

Message posted on NE Atlantic Nudibranchs on 30 Apr 2012
Paula Lightfoot Here is its face (I picked it up and moved it to stop it looking down a hole!) - it's a bit blurry but you can see there are no V-shaped markings, which is why I thought maybe Aeolidiella glauca. It was about 3-4cm long.

Andy Horton Who's eating who?

Paula Lightfoot The slug is eating the anemones. On Arran we saw anemones eating jellyfish, gradually pulling them down by their tentacles!! Even a tug of war between several anemones over the same jellyfish!

Peter H van Bragt Hello Paula, for sure A. glauca. It's known to eat a variety of anemones: Like S. troglodytes and Diadumene cincta in Dutch waters. The latter one gives a nice reddish hue in this nudibranch. This seems to be Sagartia elegans? cheers Peter H van Bragt

Paula Lightfoot Thank you Peter ! I thought the anemones were Urticina felina, dahlia anemones, they just don't have as much debris stuck to the columns as they usually do. I saw a couple of Sagartia elegans at this site, but lots and lots of dahlias.

Message posted on NE Atlantic Nudibranchs on 03 Jul 2012
Paula Lightfoot Hi, could this be Aeolidiella glauca? Seen at 8.5m depth on Urticina felina. My first thought was the grey sea slug Aeolidia papillosa which is certainly common intertidally in Yorkshire, but this specimen doesn't have the V-shaped marking on the head.

Julia Nunn i think probably glauca - speckling on the back cerata

Brendan Oonk I agree

Message posted on NE Atlantic Nudibranchs on 03 Jul 2012
Erling Svensen Yes - really nice day with quite flat ocean. Have not seen the ocean like this since October last year. Got a nice 75 minutes dive with a lot of nice things in a very exposed place in Egersund. I will post some more pictures in different groups, but this nudi - could it be Aeolidiella glauca - or another one? (I hope for another one.....)

Bernard Picton Aeolidia papillosa I think, with this white mark. It is very sharply marked on this one though...

Message posted on NE Atlantic Nudibranchs on 14 Mar 2012
Erling Svensen I do not have a good feeling for the Aeolidiella alderi or Aeolidiella glauca. I have not a good feeling A. glauca. I will do a night dive today and look for it again. If I find it I will take closer pictures. But again, I post a close up of the rhinophores and hope one of you can look again if its a A. alderi or A. glauca?

Bernard Picton I find these Aeolidiella species difficult too. My best guess for this one is A. glauca; I think A. alderi would have larger cnidosacs.

Message posted on NE Atlantic Nudibranchs on 10 Feb 2012
David Fenwick Snr Is it possible to identify this egg mass, was found under a rock on the lowershore at Little London reef, Marazion, Cornwall. 24.08.13. Thanks.

Erling Svensen Looks like Flabellina verrucosa for me.

David Kipling Tritonia lineata does nice little spirals too, but then again I think a few other species will...

Arne Kuilman Get this card or ask them: https://www.facebook.com/ZoekkaartNederlandseZeenaaktslakken I've got one at home and will have a look for you later.

Brendan Oonk I don't think yoy will find it on that card Arne. These eggs don't look like they are by a species of nudi that lives in The Netherlands...

Arne Kuilman It's not on the chart indeed )-: circlewise it's kind of like Elysia eggs.

João Pedro Silva The eggs I've found from Elysia viridis were much smaller: http://www.flickr.com/photos/jpsilva1971/7741931486/

Arne Kuilman I meant look like. Elysian doesn't lay under rocks, just the spiral pattern

Erling Svensen Looks like these...... http://uwphoto.no/shopexd.asp?id=14044

Brendan Oonk Erling is that the reason you said they were Flabelina verucosa eggs ;)

Erling Svensen Yes, it is. They are quite typical in the outher edge, so for me they looks quite F. verrucosa like.

Erling Svensen In winter we have millions of F. verrucosa, the most common nudi in Egersund and Stavanger. And lots of eggs.

Bernard Picton Cornwall is too far south for F. verrucosa. On the other hand I don't know these eggs I'm afraid. Aeolidiella glauca does lay a straight spiral a bit like this.

Brendan Oonk It is not A. glauca.

Erling Svensen Could be this verrucosa think it is too cold here up in the North and will expand the summer by mooving South?

Brendan Oonk Here you can see A.glauca + eggs http://www.natuurbericht.nl/?id=2727

David Fenwick Snr I'm still trying to find a sea slug to match up with it at the moment but nudibranchs seem few and far between at the moment. The only sea slug found today was a 2mm Palio nothus, a sea slug that has consistantly turned up for us throughout the year this year.

David Fenwick Snr Another image of A. glauca. http://www.conchsoc.org/node/5853

David Kipling https://www.facebook.com/photo.php?fbid=332958726789556&set=oa.266943763416911&type=3&theater

David Kipling T. lineata caught laying eggs like this ...

David Fenwick Snr Can only find on record of this species for Cornwall David and it was for 3-4 miles offshore. Going to have to keep my eyes open if it is this species.

David Kipling Really? Common as muck up here (albeit Skomer is more sediment-rich and T lineata seems to thrive here). Let me have a look to see whether it's in my Cornish albums, perhaps it doesn't like the clear water down with you ...

Becky Hitchin Stop bragging! :P

David Kipling That's why it's a MNR ;) Biodiversity hotspot!

Terry Griffiths And a few around Torquay.

Bernard Picton Great photo David Kipling! I've never seen T. lineata spawn but it is a good match. They are not normally found on shore in my experience so altogether some interesting observations in this thread.

Message posted on NE Atlantic Nudibranchs on 25 Aug 2013
Erling Svensen Were do I look to see the difference between the Aeolidia papillosa and the A. glauca? And what about this one?

Peter H van Bragt These two are A. papillosa.

Erling Svensen Thanks, Peter. Do you see it on the cerrata that are more triangular on the papillosa?

Brendan Oonk A. Glauca doesn't have a white triangle between its rhinophores. Is usualy more orange. But I've been told that to be absolutely sure you need to look at the radula

Brendan Oonk Forgot to mention the size difference. If its 5 cm or more you can be pretty sure it's papilosa.

Ian Smith There is a selection of different colour forms of A. papillosa at http://www.conchsoc.org/spaccount/Aeolidia-papillosa Lucas has pointed out that “A. papillosa” is more than one species, so I don’t know if these are all one or more of the segregates. Some have somewhat similar colouration to Aeolidiella glauca, but they all have what in my experience separates them from A. glauca: the gap between the oral tentacles is about three times the width of the base of a tentacle, while the gap on A. glauca is about as wide as one tentacle (Compare http://www.conchsoc.org/spaccount/Aeolidiella-glauca ) . On this basis, I think this is Aeolidia papillosa. Also, as Brendan says, the white triangle on the head is typical of A. papillosa, though they don't all have it

Bernard Picton But Lucas says the white triangle is actually typical of (one of) the new, un-named species...

Ian Smith Glad to hear that Bernard. Was it Pers Comm from Lucas or has something been published?

Lucas CerCur Our studies are not published yet. We have to complete with more material fron NW Pacific (Oregon and California States) and UK material from several localities in order to determinate the real geographical distribution of true A. papillosa and the "other A. papillosa (sibbling species).

Lucas CerCur I hope to be able to sequence one specimen of A. glauca from UK in a few weeks.

Lucas CerCur But now, from 2 weeks ago I have a lot of burocracy on my back, and many Universitary policy meetings (rubbish....).

Bernard Picton collections auditing, documentation, doing the jobs of people who have retired recently...

Bernard Picton I will soon be able to get A. glauca, Strangford Lough has a population which seems to be there each year at the right time...

Peter H van Bragt Lucas already has Dutch specimen of A. papillosa. As soon as we get A glauca again (late winter, early spring, locally very common) I could collect a few specimen too.

João Pedro Silva (off topic, but I wonder if bureaucrats are a widespread species or several different species occupying the same niche... and they do have some morphological similarities)

Lucas CerCur Thanks to all of you!!!!!

Message posted on NE Atlantic Nudibranchs on 28 Jan 2013
Eric van Andel Today at Oosterschelde; St Annaland. Found a Aeolidia papillosa that has a orange like color (especcialy the tips of the rinophores). Perhaps getting in the mood for the European Championships Soccer as a fan of the Dutch team??

João Pedro Silva I wonder what you would say about the Doriopsilla or Armina maculata and of course Berthellina edwardsi. Actually, orange is a very common colour in our opistobranchs. I wonder if someone has ever tried to find patterns in the geographic distribution of colour.

Eric van Andel Here in NL you only see white or brownish Aeolidia papillosa that was why I was wondered... Is it Ecotypical Variation?? With other words... do they get the color of the food they eat?

João Pedro Silva I'm really not sure. Some do get their colour from the food (or what we actually see is the colour of the food), even showing some variation along the digestive gland (http://www.flickr.com/photos/jpsilva1971/4784556408/). But what to say about Cratena peregrina's "war paint"? http://www.flickr.com/photos/jpsilva1971/5830432341/

Marco Faasse João, that's an interesting splanchnotrophid parasite in your Cratena photo, any idea which species it belongs to?

João Pedro Silva Marco, I have no idea. But I've been tagging the photos with parasites and assembling a set on Flickr: http://www.flickr.com/photos/jpsilva1971/sets/72157626974078442/

Marco Faasse Very good! There are several species of splanchnotrophids in the NE Atlantic. I noticed that some egg sacs are white and others are purple. I wonder whether different parasites produce eggs in different colours. We have Spanchnotrophus angulatus parasites with purplish eggs in Aeolidiella glauca.

Message posted on NE Atlantic Nudibranchs on 25 Mar 2012
Rudolf Svensen Anybody knows which type this nudi is? It is close to 10 mm long and image is captured in Stavanger, Norway.

Eric van Andel Aeolidiella glauca (Alder & Hancock, 1845) ??

Rob Maller Eric, I was just about to say the same :)

Eric van Andel http://www.anemoon.org/anemoon/soortinformatie/naaktslakken/aeolidiella_glauca Site is in Dutch but it seems a look alike!

Rudolf Svensen Thnx. Usually these are so large so I guess the sice fooled me.

Eric van Andel @ Rob: great minds think alike.... lol

Eric van Andel Rudolf, I think you usualy see the: Aeolidia papillosa (Linnaeus, 1761) Those are bigger!

Rudolf Svensen Yes, your right. I noticed Erling Svensen had the wrong Norwegian name of one Aeolidiella glauca in our database. He is the sea slug man, so he should know better ;-) thanks a lot.

Message posted on NE Atlantic Nudibranchs on 14 Feb 2012
Erling Svensen I have tried to figure out what specie this may be. My suggestions falls on Aeolidiella alderi. Anybody that can confirm that?

Klas Malmberg Aquatilis Interesting! I have got a picture from Gulen that is exactly the same color and style. The typical A. glauca in Sweden has no color in the rhinoforer, so it defenately looks like something else. I will check my books at home when I´m home from the Filippines, but I think A. alderi is possibel

Jim Anderson It looks like Aeolidiella glauca to me - I've got a range of colours here http://www.nudibranch.org/Scottish%20Nudibranchs/aeolidiella-glauca.html

Erling Svensen Yes, that could be so. I still hope for A. alderi, but I agree that your pictures shows species with the same colours and shape. Thanks!

Message posted on NE Atlantic Nudibranchs on 08 Feb 2012
Manuel Martínez Chacón ¿Me ayudais a identificar este nudibranquio?

João Pedro Silva Aeolidiella alderi

Encarni Sánchez Castillo Spurilla neapolitana?

Encarni Sánchez Castillo Aeolidiella alderi era el otro que tenía en mente

João Pedro Silva Não é Spurilla neapolitana, tenho a certeza. Trata-se de Aeolidiella alderi: típico primeiro grupo de cerata com cnidosacos alongados que lhe dão um aspecto de "gola" ou "juba".

João Pedro Silva http://www.flickr.com/photos/jpsilva1971/6828070676/

Manuel Martínez Chacón Me queda claro, Aeolidiella alderi, muchas gracias.

Encarni Sánchez Castillo Pues rectifico en mi foto. Thanks ; )

João Pedro Silva Eventualmente poderá confundir-se esta espécie com Aeolidiella sanguinea ou com Aeolidiella glauca. Spurilla neapolitana é muito distinta, com cerata em grupos melhor definidos e os rinóforos não são lisos como em Aeolidiella spp.: http://www.flickr.com/photos/jpsilva1971/6751672883/

Message posted on Nudibranquios on 05 Oct 2013
Rachel Shucksmith Never been anywhere with so many Aeolidiella glauca (or so few other nudibranchs), who seemed to be mostly preoccupied with making hundreds more of themselves. Toft Pier, Shetland. The pier legs were covered with plumose anemones which they were devouring. Lucus CerCur are you still wanting Aeolidiellas?

Brendan Oonk Rachel these are Aeolidia papillosa

Rachel Shucksmith do they not need a mono-brow?

Ian Smith Rachel if you look at http://www.conchsoc.org/spAccount/aeolidia-papillosa you will see that what has passed as A. papillosa sometimes does not have the white V or Y on the head. But Lucas' paper shows (if I've understood it) that there are at least 2 spp. being called A. papillosa in NE Atlantic. I'm looking forward to his promised information on individual species/ genus. I hope there will be some morphological features that will enable us to segregate the A. papillosa spp., maybe presence/absence of the white head mark?

Brendan Oonk In the second picture you can see the eggs of your nudis. A.glauca eggs look different. For a picture see: http://www.jojodive.nl/Nudy%20branches/Dutch%20%20Sacoglossa%20and%20Nudibranchia/slides/Aeolidiella%20glauca%20spawn.html

Lucas CerCur Yes, I'm still waiting for it. I suspect that these animals are from northern UK also, isn't it?

Rachel Shucksmith yes they are, but we do also get the ones with the white V/Y, which I have seen more often. There werent any with the V/Y on this dive.

Message posted on NE Atlantic Nudibranchs on 05 May 2013
Jim Anderson Aeolidia papillosa and Aeolidiella glauca? (approx 55mm) at 7 m. Inverkip Pier, Firth of Clyde - 6 Mar 2013

Brendan Oonk Just papillosa

Peter H van Bragt I agree with Brendan, all A papillosa's

Gary Cobb I agree with Aeolidia papillosa nice find Jim so many to choose from!

Lucas CerCur Very interesting.

Lucas CerCur How many kms (or miles) are from this locality to the first one from which you collected the A. papillosa that you sent me some months ago.

Lucas CerCur How many kms (or miles) are from this locality to the first one from which you collected the A. papillosa that you sent me some months ago?

Jim Anderson Approx 50 km

Lucas CerCur Thank you.

Message posted on NE Atlantic Nudibranchs on 06 Mar 2013
René Weterings Aeolidiella glauca Found in Lake Grevelingen in the Netherlands by the dozens on june 6th 2012. Literally everywhere I looked there were these little ones. Also several stacked on eachother, eating anemones, sometimes up to 7 nudi's.

Message posted on NE Atlantic Nudibranchs on 08 Jun 2012
René Weterings "Aeolidia papillosa" Found in the Eastern Scheldt in The Netherlands on the 12th of december 2012, at a watertemperature of 3 degrees Celsius (about 38 degrees Fahrenheit) and a depth of 5m.

Lucas CerCur But ...is this the real papillosa? I feel this specimen not.

René Weterings Yes I am sure.

Marco Faasse The beast looks a bit strange, but in this area not unusual for A. papillosa. In my opinion there is no doubt. Note the white triangle on the head.

Lucas CerCur I supposed that this would be your thoughts. However, molecular studies that has been carried in my lab very recently (unpublished), showed that in the Netherlands there are two species under this name.

René Weterings Ok, that's interesting news! But as far as the average divers knows....(like me) we only have the Aeolidia papillosa. And of course the Aeolidiella glauca which looks a bit like it.

Marco Faasse Lucas CerCur, I am very curious to read your results when published. Especially curious which separate niches the two species occupy. Always interesting to see in retrospect how it was possible to overlook things.

Brendan Oonk Lucas , I would like to have more information on this. Are there any morfological/anatomical differences, or is it just genetics? Any idea on if and when this will be published? René Don't forget the recently found Aeolidiella alderi ;)

Lucas CerCur Brendan, it is difficult to distinguish both species. We have to discover this carrying molecular phylogenetic analyses.

Lucas CerCur It seems like the true papillosa is darker usually, and the cerata are spindle shape vs an hooked top in the non true papillosa.

Lucas CerCur But to compare more material from different localities would be much better. Moreover, we know nothing about potential ecological and biological differences.

Lucas CerCur I don't know when we will publish our results, but this will take time because we want to have more data and information.

Brendan Oonk Thanks for your response! If we can help you by collecting data/material/fotos just let it know. (Patiently) Looking forward to your publication :)

Lucas CerCur Brendan, what is your potential sampling area?

Message posted on NE Atlantic Nudibranchs on 14 Dec 2012
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
              Aeolidida (Infraorder)
                Aeolidioidea (Superfamily)
                  Aeolidiidae (Family)
                    Aeolidiella (Genus)
                      Aeolidiella glauca (Species)
Associated Species