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Umbonula littoralis

Hastings, 1944

Erling Svensen Umbonula littoralis from yesterdays dive. Who sayes it not can be colourfull in Norway under water?

Message posted on NE Atlantic Bryozoa on 19 Apr 2013
Andrea Waeschenbach Hi Paula, It might be Umbonula littoralis, but it's difficult to say from unbleached material. Here's an SEM picture I took of U. littoralis, if this helps...

Message posted on NE Atlantic Bryozoa on 08 May 2012
Carol Horne It's the discoid bryozoan in the middle I'm interested in...any id?

Erling Svensen It looks like Umbonula littoralis.

Carol Horne FacebookLooks like you're possibly right! Thanks

Joanne Porter I'm not sure you can tell from this photo what that specimen is.

Message posted on Seasearch Identifications on 22 Jun 2012
Carlos Fernández-Cid Ramos does anyone know what is that thing under the rostanga rosi?

Erling Svensen Bryozoa called Umbonula littoralis

Carlos Fernández-Cid Ramos Thanks Erling. Galicia Spain. Vigo

Erling Svensen Many nudies eat bryozoans. I have never seen this one in Norway, but with the globel warming may be we soon will see it here.....

João Pedro Silva This is a sponge feeder so it's just passing by over the bryozoan. I wonder if there are more UK records besides the ones at the Sea Slug Forum (2002 and 2008)? http://www.seaslugforum.net/find/22569

David Kipling First UK record was me and Sarah back in 2002 on the UK mainland (that's the SSF record), and both ourselves and others have seen it in the Scillies on Seasearch surveys. I'm not aware of any other mainland UK records. Does this species have a planktonic phase or is it direct development?

David Kipling And yes, the SSF comment about Mark Warren in 2008 is the same one as in the seasearch report. It was also seen the following year so looks like a small population there.

David Kipling The only mainland UK record is the 2002 sighting Sarah Bowen and I made in Penzance (which is close to the Scillies). Does this species have a planktonic phase or is it direct development?

David Kipling The third UK sighting of this species was in 2009 (Sarah Bowen had her eye in that day) in Scillies. There's a pic on the BBC website (4th pic). http://news.bbc.co.uk/earth/hi/earth_news/newsid_8352000/8352549.stm

David Kipling And the 4th sighting was in the Channel Islands (Sark), a new record for there, in 2010. Me and Sarah again I'm afraid! http://www.seasearch.co.uk/downloads/Sark%202010%20report.pdf

David Kipling OK that's now making it look like I'm stalking that slug ...

João Pedro Silva Reallocation of Discodoris rosi to the Rostanga genus is discussed here: Dayrat B., Gosliner T. M. Species names and metaphyly: A case study in Discodorididae (Mollusca, Gastropoda, Euthyneura, Nudibranchia, Doridina). Zool. Scr. (2005) 34:199â€"224. http://campillos.ucmerced.edu/~bdayrat/PDF%20of%20Papers/Dayrat&Gosliner-2005-ZooScr.pdf It is based on the Rostanga characteristic hair-like lateral teeth which are also observed in D. rosi.

João Pedro Silva Here in Portugal it's not very common. I've only seen it three times each on very distinct spots.

Bernard Picton Ok, now I'm going to sound old, but I first saw one in 1978, at the Cíes Islands, Vigo, Spain (41.1750,-8.9117). It was eating a sponge which I identified as Microciona strepsitoxa (now Clathria s.). It is very big compared with other Rostanga species, but other Rostanga do like to eat sponges from the family Microcionidae and the gills are certainly like those of Rostanga too. Thanks for the pdf João.

David Kipling Do you have a daguerreotype of that, Bernard?

Bernard Picton I see why I couldn't identify it straight away - not described until 1979. http://www.facebook.com/photo.php?fbid=10150659329259682&set=a.10150659328644682.405069.749164681&type=3&theater

Carlos Fernández-Cid Ramos In the proximity off the Atlantic Islands National Park are relatively frecuents. I´ve seen them in the Ons Island, Bueu, Panjon and Cangas

Bernard Picton Joanne Porter, are we right on this bryozoan?

Liz Morris Hello all, If it helps with your distribution data, we had Rostranga rubra off East Anglesey in 2011. I'm not sure whether it is in NBN gateway yet. Nice bryo - are those the brown bodies so clear?

Marco Faasse The bryozoan looks a bit like Watersipora subtorquata. Impossible to tell for sure without stereomicroscope.

Carlos Fernández-Cid Ramos Thanks Marco.

Richard Lord This bryozoan looks like the non-native Watersipora subtorquata, which was first seen in Guernsey on 30 May 2007 in St Peter Port's Queen Elizabeth II marina. Check with Prof. John Ryland who wrote recent paper on Watersipora species in European waters - See my image http://www.sealordphotography.net/Nature/Guernsey-marine-life-by-major/Guernsey-Bryozoa/2141052_q5jzQP#!i=166798516&k=nJ9BZ

Richard Lord I replied before seeing Marco's comment.

João Pedro Silva Don't forget this was shot in Vigo, Galicia, on the northwestern coast of Spain.

David Kipling Is it native to that bit of Span, João Pedro?

João Pedro Silva I'm afraid I don't know much about bryozoa, David so I don't know if it's native or introduced. I was just reminding the location as it is not mentioned in the photo and the comments aren't all visible (and most won't read the first comments).

Message posted on NE Atlantic Nudibranchs on 28 Mar 2012
Animalia (Kingdom)
  Bryozoa (Phylum)
    Gymnolaemata (Class)
      Cheilostomatida (Order)
        Neocheilostomatina (Suborder)
          Ascophora (Infraorder)
            Umbonulomorpha (Section)
              Lepralielloidea (Superfamily)
                Umbonulidae (Family)
                  Umbonula (Genus)
                    Umbonula littoralis (Species)
Associated Species