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Polyclinum aurantium

Milne-Edwards, 1841


Erling Svensen Could this tunicata be a Polyclinum aurantium? South West Norway.

Message posted on NE Atlantic Tunicata on 27 Oct 2013
Andy Jackson A close up and maybe a bit of Polyclinum aurantium?

David Kipling The sand encrusted bit in the bottom left, yes - looks like Bernard's pic on Habitas. The other pale colonial I'm not sure about. Four squirt species in one pic ;)

Message posted on Seasearch North East England on 08 Oct 2012
Andy Jackson Polyclinum aurantium

Message posted on Seasearch North East England on 08 Oct 2012
Craig Muirhead Anyone able to ID this very small squirt? Found 09/08/13 at Green Ends, Eyemouth, Scotland Depth 12m, water temp 13°C

David Kipling Sidnyum (or Aplidium depending on whether you want to have that argument!) turbinatum. Usually found as single systems like the one on the right, with a single ring of white-rimmed zooids round a cloaca. Common shallow-water/intertidal species, nearest confusing species would be A nordmanii in its white form.

Tom Kerr Hi Craig Muirhead I posted up a photo of S turbinatum also taken in Green Ends Gully earlier this week. They were taken at the base of Kelp holdfasts very close to the entry/exit point in just a few metres of water.

David Kipling This species tends to stay as single systems ... even if you get a group of them together touching each other you can still see they are separate, as opposed to fused as a single colony. A nordmanii in contrast will do large colonies with white on it where a single fused colony has multiple systems and cloacas. The question comes when you see a small lump of A nordmanii, which might even be a single system, can you tell the difference to turbinatum? Answer in part is the shape, turbinatum tapers in to the base (the zooids appearing to grow out of a single point) whereas nordmanii has more vertical sides and a feel of zooids embedded in a semi-opaque test.

Tom Kerr Thanks David Kipling, I am heading down to Eyemouth later today to have another look and see if I can get better photos.

David Kipling Have a look to see if you get Polyclinum aurantium in the surge gullys ... Fiona Crouch has seen it at St Abbs. Rachel Shucksmith has posted an album of this species on this group recently.

Becky Hitchin I love turbinatum <3

Becky Hitchin P. aurantium - I get confused by this - are there actually any identifying features?!

David Kipling Have you seen Rachel's album Becky?

Becky Hitchin Nooo, hardly seen anything on FB over the last few weeks! Going to find it ...

Message posted on NE Atlantic Tunicata on 17 Aug 2013
Tony Gilbert As this was at the base of a stripped Haliclona, and it exhibits many of the characteristics of Jorunna, then at present, I think it is. Brown blotches. It was found in the Menai Straits under the suspension bridge, in an every increasing current. I think its retracted and covered in detritus-material.

David Kipling Would be unusual for a nudi to be covered in detritus like that. The small holes do suggest a filter feeder (tunicate/sponge), as Dawn suggests. I'd vote sponge ...

Jim Anderson Looks like a seasquirt to me

Rob Spray It's full of holes with sphincters... I vote squirt :-)

Christian Skauge Colonial ascidian in my opinion too...

João Pedro Silva Not sure what it is but I'm sure it's not Jorunna.

Christian Skauge João, you might not get well paid if you bet on that :-)

Tony Gilbert I am struggling with it. Looking at the high-def version, there seems to be rhinophores, but am not convinced like yourselves.

Christian Skauge No way, man - this one is full of holes like a squirt colony ;-)

Tony Gilbert Yeh, I think you're right, case of dodgy mis-id on my part. I best pay more attention next time. thanks.

David Kipling One possibility might be Polyclinum aurantium. It's on NBN as being in N Wales. http://www.habitas.org.uk/marinelife/species.asp?item=ZD340

Tony Gilbert Yes, it certainly looks plausible. Thanks David.

Message posted on NE Atlantic Nudibranchs on 19 May 2012
Erling Svensen Could this be the Polyclinum aurantium? I do not know about any other that it possible could be

Wilfried Bay-Nouailhat I think it is a didemnid, it looks like a picture in F. Lafargue et M. Wahl, the Didemnid ascidian fauna of France, ID'd as Diplosoma listerianum

Message posted on NE Atlantic Tunicata on 24 Jun 2012
George Brown Need assistance with this tunicate please. Fairly common but only found between 10 to 35m. Area subject to strong tidal streams in very clear water. Each "colony" about 30mm in diameter and 10 to 15mm in height and coated with sand particles. Eilean nan Ron, north coast of Scotland.

David Kipling Polyclinum aurantium ? Based on there being multiple exhaling openings.

Claire Goodwin It looks like Synoicum incrustatum that we get off the Skerries - mainly because of the sand encrustation. It is very similar to P. aurantium and was omitted from Millar (see Habitas) - David Connor did a paper on it http://www.jstor.org/discover/10.2307/25539358?uid=2&uid=4&sid=21102171253737.

David Kipling "Each lobe is a single system, occasionally two...each ... with a common cloacal opening" - from the Connor ref. The larger specimen here looks like it has five or more cloacal openings though.

David Kipling There's a photo of Polyclinum aurantium on the JNCC biotope site (photo from Keith Hiscock) that looks like a sand-encrusted squirt with multiple systems and quite like this picture of George's: http://www.jncc.gov.uk/marine/biotopes/biotope_image.aspx?biotope=JNCCMNCR00002141&cd=0002&image=IMG0001.jpg

Claire Goodwin I think these two species would benefit from some dissection and photos to clarify ID. I'm not all that familiar with P.aurantium so would be nice to get a better idea of field characteristics. Suspect Synoicum under recorded/misidentified frequently. Now George Brown will have to go back for a sample! - but Bernard Picton can probably advise.

David Kipling Sounds like a plan :) Are either species in Strangford (thinking BioBlitz)?

David Kipling George - is Eilean nan Ròn the island off the coast at Tongue?

Claire Goodwin Will have to check databases but not sure we get either. See what you mean about the openings now.

George Brown EnR is the island to the east of the entrance to the Kyle of Tongue. A beautiful, haunting island which supported many families but was eventually abandoned in 1938.

David Kipling OK you can take us there next year on the 2014 Aberdeen to Assynt Ascidian Adventure!

Becky Hitchin Definitely! I remembered today the joys of club diving - whizzing round a rock without even a proper chance to look. George Brown, I might be coming knocking on your door!

George Brown AAAA. I like the sound of that! And Becky, I like the sound of that too! In the not too distant past we used to have regular Seasearch dives. One memorable outing was at Rosehearty which terminated at the excellent coffee shop in the "Museum of Scottish Lighthouses" in Fraserburgh. A grand day out!

Bernard Picton Strangford Lough (bioblitz, David) has plenty of large Polyclinum aurantium on kelp in the narrows, very different external morphology to these ones.

Message posted on NE Atlantic Tunicata on 19 Apr 2013
Andy Jackson HI all, this was shot in Orkney, I'm assuming it's a blue sponge of some sort, can anyone identify please? thks AJ

David Kipling Based on the bit at the front I'd say it's Bot schloss.

David Kipling Are those two patches of Polyclinum aurantium to the extreme left (Orkney would be the right place to find it, loads of records on NBN for this species).

Paula Lightfoot Yes looks like the flower sea squirt Botryllus schlosseri, not a sponge.

Andy Jackson Thanks David and Paula, I'm processing hours of similar footage from 2 trips to Shetland and Orkney, it's destined for sale with the Nature Picture Library. You'd love it all, some fantastic scenes with lots of secondary subjects that have crept into shot without me noticing! So much colour!

David Kipling Andy Jackson - could you do me a favour? I'm trying to sort out in my head what Polyclinum aurantium looks like in the field, and one of the things I've seen labelled as it is that pair of buff-cloured blobs in the extreme left foreground. Could you post a cropped version of this image, or if these are screen grabs from video then do you have a better one? Thanks!

Andy Jackson Dave, its a video screen shot, I'll post an enlarged version of it. This clip doesn't get any better but as I'm processing I'll look out for more.

David Kipling Cheers - FB throws most resolution away, so a crop usually helps.

Message posted on Seasearch North East England on 06 Oct 2012
James Lynott After reading the thread below regarding Polyclinum aurantium, I remember seeing something similar in one of my photos taken back in June at the Summer Isles. http://flic.kr/p/eJhGuL Are these examples of P. aurantium?

David Kipling You have two colourways there James, interesting. I'm not 100% sure this is the same as the stuff Rachel was seeing; yours seems to be simple systems (a ring of oral openings around a single cloaca) whereas hers seems to have many more siphons and looks like may systems fused. What do you think Rachel, is this the same?

Message posted on NE Atlantic Tunicata on 11 Aug 2013
Liz Morris

Liz Morris Hi David Kipling, In situ the siphons lookedreally quite large and 'paired' compared to Polyclinum aurantium. But you're right, the images here dont look Perophora like at all. I have preserved something that I think is P.aurantium from nearby, similar to Rachel's (if you want it? ), but sadly these more perophora like ones spoiled as they were on rock that got squished. Oh well, I guess I'll just have to dive again :)

David Kipling How about Archidistoma aggregatum?

Liz Morris Nail on head springs to mind. Good detective work Inspector Kipling :)

Liz Morris thank you :)

David Kipling Archidistoma has zooids that are fused but without a common cloaca - hence the paired appearance. You do need to get a strobe though so I don't get misled by your colour balance Liz :). I can recommend the TG-1 that Kate Lock uses ...

Kate Lock recommended by Rob last year and now used by Sarah, myself and young Jacque Picton too.... It is the Olympus tough TG-1.... which is better to use with the housing although can go to 12m by itself (so no worries about flooding!)....Pretty good with just the internal flash...Sarah Bowen uses with a spotter light....and I either use a spotter torch - see the firework anenome/CU photos I took in Ireland ....or I add a strobe for a more balanced lighting...for a compact point and press excellent!!!

Liz Morris Why thank you.. I need an upgrade for sure. I believe that mine is now doing well at 7 years old (or maybe more!)

Kate Lock Obviously snazzier options out there but this is cool if on a budget like me!!

David Kipling Yes but I would argue it hits a real sweet-spot of performance for a P&S, and the next spot upwards in price bring compromises with size, usability, etc (eg my rig).

Message posted on NE Atlantic Tunicata on 17 Sep 2013
Claire Goodwin Comparative one for David Kipling! Looks like your vis in Wales was better though.

David Kipling So what species is this Claire? Is this Polyclinum aurantium?

Claire Goodwin I think so bottom left (well that's what I've been calling it!) but did you spot the one top right?

David Kipling You mean the Clavellina? << ducking >>

Claire Goodwin :)

David Kipling That's what we call S. incrustatum (sandy, one hole, group of others around it ina

David Kipling ... in a lobe. Looking at the bigger ones we get I think they are just over-fed! I have some to dissect to confirm though.

Claire Goodwin Yup me too. Was quite pleased to get them both in one pic.

Message posted on NE Atlantic Tunicata on 03 Jun 2013
Taxonomy
Animalia (Kingdom)
  Chordata (Phylum)
    Tunicata (Subphylum)
      Ascidiacea (Class)
        Aplousobranchia (Order)
          Polyclinidae (Family)
            Polyclinum (Genus)
              Polyclinum aurantium (Species)
Associated Species