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Armina maculata

Rafinesque, 1814


Rudolf Svensen Here is an other bugger from todays dive, Armina loveni. Never seen one before. It was quite eager to dig down in to the mud too. Does anybody knows what they eat. Maybe sea pens?

David Kipling Bernard Picton's website suggests the sea pen Virgularia mirabilis. Wow ;)

Torjus Haukvik Sea pens are correct, specifically Virgularia mirabilis.

Jussi Evertsen Both Pennatula and Virgularia - Armina is a burrowing species so you were lucky to find one up and about

Rudolf Svensen Yes there was a lot of Virgularia mirabilis around and some of them looked a bit worn out :-) . Jussi Evertsen we found several. Is Cuthona pustulata a burrowing species too?

George Brown I watched one crawl towards a juvenile Pennatula but it disappeared into the mud just before it made contact. Maybe heading for the seapens root? Google "Attack of the Sea Slugs" for an amazing video that reveals why we don't see this nudibranch often. If Cuthona pustulata also borrows I wonder how many other species employ this tactic?

Jussi Evertsen I have only found Cuthona pustulata on hydroids so far, so I would not place a bet on it

João Pedro Silva I've only seen Armina maculata eating (it feeds on Veretillum cynomorium). In some places it's often found intertidally and there it appears to "dig in" for the "root". But I once saw one on top of the Veretillum cynomorium (~10m deep) and the sea pen had distinct bite marks: http://www.flickr.com/photos/jpsilva1971/6997998059/ The bite marks appear to fit the profile of the radula (http://en.wikipedia.org/wiki/File:Armina_maculata_Rafinesque,_1814_-_radula_.jpg).

Tony Gilbert How interesting. Virgularia mirabilis occurs a lot in Scottish sea lochs, although there is one colony I've seen in Holyhead marina, and another next to the Lochgarry. Although I've not seen the nudi: http://www.flickr.com/photos/tonyjgilbert-images/4256758825/in/set-72157621920489748/ Veretillum cynomorium is present also in Canary islands, Where in Lanzarote it is only (mainly) seen nocturnally, and is recorded as rare-ish here: http://www.flickr.com/photos/tonyjgilbert-images/5559034843/in/set-72157626351917680 Be sure to be looking for this one next time!

Message posted on NE Atlantic Nudibranchs on 05 Jun 2012
David Kipling Contrary to what Dawn Watson thinks, I do not have a supply of model nudibranchs that I take with me on dives ;) These are from the National Museum here in Wales, made of Fimo I think!

Christian Skauge I have a kit like this, bought on eBay from Japan :-)

João Pedro Silva My wife makes bijoux with Fimo professionally and I've been trying (for ages!) to convince her to do these models with the portuguese species.

Christian Skauge http://www.facebook.com/photo.php?fbid=1550708580196&set=a.1157771997027.24269.1609584836&type=3&theater

João Pedro Silva Hurrah! I've shown my wife these models and she asked me to pick 6 species for her to make until June :)

Bernard Picton Tell your wife it's a very noble tradition. These glass models were traded widely and many museums still have some. There was a conference about them in recent years in Dublin. http://en.wikipedia.org/wiki/Leopold_and_Rudolf_Blaschka

Bernard Picton Christian Skauge, for your contact who wanted Glaucus, NM Wales have a Blaschka one!! http://www.museumwales.ac.uk/en/rhagor/galleries/blaschka/

Christian Skauge Do you have dates for June? Been away a few days (Nudibranch Safari, of course!) and haven't paid much attn to FB...

Bernard Picton Or July?

Christian Skauge Fantastic glass figures - I want one!!

Bernard Picton I doubt if you can afford one, I'm afraid. But if you visit Ireland we could try and get to see the ones in National Museum of Ireland. It was closed to the public, but I have contacts. http://www.ucd.ie/blaschka/

Christian Skauge Will do! I think I'll have to steal one, they seem a bit pricy... :-D

Bernard Picton Did you find a price?

João Pedro Silva Sorry, I don't have dates yet :(

João Pedro Silva I've sent a list of 8 species so she can pick 6: Flabellina babai, Hypselodoris villafranca (these are so common they are a "must"), Armina maculata, Marionia blainvillea, Diaphorodoris luteocincta, Dondice banyulensis, Chromodoris luteorosea, Cadlina pellucida. If these turn out ok I'm counting on you to convince her to the all the NE Atlantic species :)

David Kipling Okenia elegans of course!

Christian Skauge @ Bernard: Found no price, just a wild guess :-)

Gonçalo Calado Same with algarvian typical pastery http://www.imagesofportugal.net/media/471cd934-bdc1-11e0-acb5-57e8dc34769b-algarve-s-traditional-pastry-portugal

João Pedro Silva I usually describe Platydoris argo as a pancake orange underneath with sugar on top.

Bernard Picton Now don't go there... Seasearch keep inventing common names for things, Amphilectus fucorum = shredded carrot sponge - trouble is they are always food related...

Bernard Picton Pentapora was widely called ross coral (I think a typo for rose) but they invented potato crisp bryozoan....

Christian Skauge hahaha I always get hungry when finding a sea sausage :)

João Pedro Silva All the nudibranchs here in Portugal share on common name: "nudibranch". Except for Peltodoris atromaculata: "vaquinha suíça" (literally, "swiss cow", a dairy Holstein breed cow).

Becky Hitchin I have some plastic nudibranchs from Japan :)

David Kipling I have to say that I am disappointed that the National Museum (which tends to focus on welsh natural history) has a display of purely tropical nudibranchs! I think we should get João Pedro Silva's wife to make an extravagant set of NE Atlantic nudibranchs to replace them, to show that the Atlantic has species that can easily rival those in the tropics.

David Kipling Although we might have to make the Dotos a bit larger-than-life!

Message posted on NE Atlantic Nudibranchs on 29 Mar 2012
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
Gonçalo Calado My 7-year-old son holding an Armina maculata today at Tróia, Portugal on a huge spring tide.

João Pedro Silva And this is not the biggest they get :) It's really difficult to tell from a few meters away if it's Veretillum cynomorium, Armina maculata... half squeezed orange or a fancy tennis ball.

Message posted on NE Atlantic Nudibranchs on 06 Jun 2012
João Pedro Silva A very large (~15cm long) Armina maculata bending down Veretillum cynomorium with its weight. The sea pen appears to have some bite marks but I'm not sure if those were made by the nudibranch. Arrábida, Portugal (Lat: 38.50784, Lon: -8.92032), ~8m deep.

João Pedro Silva After looking at this SEM image of the radula of Armina maculata, I'm convinced that it is the "exhibit A" I was looking for. http://en.wikipedia.org/wiki/File:Armina_maculata_Rafinesque,_1814_-_radula_.jpg Feel a bit like CSI :)

Message posted on NE Atlantic Nudibranchs on 21 Mar 2012
João Pedro Silva Which Armina? Shot in Tróia, Portugal, during the low tide. Lots of Veretillum cynomorium around and their predator look alike Armina maculata.

Message posted on NE Atlantic Nudibranchs on 11 Mar 2012
João Pedro Silva Armina maculata Local: Tróia, Portugal Profundidade: intertidal Data: 17-02-2012

Message posted on Nudibranquios on 22 Sep 2013
Gonçalo Calado My 7-year-old son holding an Armina maculata today at Tróia, Portugal on a huge spring tide.

João Pedro Silva And this is not the biggest they get :) It's really difficult to tell from a few meters away if it's Veretillum cynomorium, Armina maculata... half squeezed orange or a fancy tennis ball.

Message posted on NE Atlantic Nudibranchs on 06 Jun 2012
João Pedro Silva A very large (~15cm long) Armina maculata bending down Veretillum cynomorium with its weight. The sea pen appears to have some bite marks but I'm not sure if those were made by the nudibranch. Arrábida, Portugal (Lat: 38.50784, Lon: -8.92032), ~8m deep.

João Pedro Silva After looking at this SEM image of the radula of Armina maculata, I'm convinced that it is the "exhibit A" I was looking for. http://en.wikipedia.org/wiki/File:Armina_maculata_Rafinesque,_1814_-_radula_.jpg Feel a bit like CSI :)

Message posted on NE Atlantic Nudibranchs on 21 Mar 2012
Taxonomy
Animalia (Kingdom)
  Mollusca (Phylum)
    Gastropoda (Class)
      Heterobranchia (Subclass)
        Opisthobranchia (Infraclass)
          Nudibranchia (Order)
            Dexiarchia (Suborder)
              Euarminida (Infraorder)
                Arminoidea (Superfamily)
                  Arminidae (Family)
                    Armina (Genus)
                      Armina maculata (Species)
Associated Species