Discodoris rosi

Paulo Nunes NUDI "Discodoris rosi" O Grove (Spain)

Jose Miguel Jimenez Adalia Muy buena foto :-) Si te gusta la biodiversidad si quieres puedes subir las fotos gratis en esta página Biodiversidadvirtual.org Es una página para la identificación de especies, y allí puedes identificar especies. Las fotos son a tu nombre y con copyright. Saludos.

Orietta Rivolta Discodoris rosi Ortea,1979 Numana,Italy June 2011

Antonello Nazareno .... The actual name should be Rostanga rosi ... but its presence in Mediterranean has not been established .... Rostanga rosi is not a mediterranean taxon . This specimen should be an Aldisa sp . ...

Orietta Rivolta The ID was made by Federico Betti biologist and author of The Kingdom of nudibranchs :-)

João Pedro Silva I agree with Rostanga rosi for the current name but there are more records of this species for the Mediterranean, namely in Spain. This specimen has very inconspicuous white rings around the slightly darker spots which suggest R. rosi. All the individuals I've seen had them very clear but the photos from southern Spain at Nudipixel, confirmed by Lucas Cervera, also show them: http://www.nudipixel.net/species/rostanga_rosi/ Antoni López-Arenas i Cama has photos from further east, near Barcelona, where the rings are also clearly marked while other images have them more subdued (like in Orietta's photo): http://www.flickr.com/photos/alopezarenas/3505249681/ http://www.flickr.com/photos/alopezarenas/6869456780/ While there could be more than one species involved, I think R. rosi is actually present in the Mediterranean.

João Pedro Silva It's also included in the GROC Guide (Opistobranch Research Group of Catalonia) with photos from the Mediterranean: http://guia.opistobranquis.org/2009/12/discodoris-rosi.html

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).

Rob Maller @Bernard Picton and others.....I presume the idea behind this group is to show what species one finds, more than a challenge regarding to who takes the most professional pictures?? I'm a newbie here...a slug fanatic from The Netherlands.

Bernard Picton FB is quite a transient medium, so yes, it's not for showing what a good photographer you are. We've put up a few real problem species so far, but it's also to exchange knowledge of how to identify things.

Rob Maller Got the massage Bernard...

Marco Faasse Good massage, Rob ? ;-)

Rob Maller Ai.. mean message grrrr.....typo

Marco Faasse Of course. Never mind, some of the best humour originates from typos. Thanks, and I hope to see some of your finds here in the future.

David Kipling It's all about the interesting critters, not the quality of the picture. A lot of ours (me and Sarah Bowen) are taken on a tiny Canon IXUS! And as Bernard knows, the first UK record for Discodoris rosi was taken with an Oly 3020 in a PT-010 housing ... many years ago! So welcome to the group Rob.

Christian Skauge Absolutely, there are enough "I'm-a-great-underwater-photographer" forums out there already. And shooting species for ID is very different (which I tend to forget myself sometimes): Try to remember shooting from different angles and let the photo rules go overboard... it's all about getting as much info as possible, not creating underwater art. But if you can do both, that's great too :-)