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Macropodia rostrata

(Linnaeus, 1761)

Fredrik Myhre Long Legged Spider Crab - Macropodia rostrata The Oslo Fjord, Norway Nikon D70s in Ikelite housing, 90mm Tamron, 2 x Ikelite DS51 strobes Manual, f/16, 1/125 sec, ISO 200

Message posted on Underwater Macro Photographers on 14 Mar 2012
Penny Martin

Penny Martin Another macropodia ??

Andy Rapson Most likely Macropodia rostrata.

Philippe Velghe In the foreground a Polycera quadrilineata,in the background a Macropodia rostrata. The Netherlands.

Daniel Beaureperre nice light

Message posted on UWphotographers on 10 Aug 2012
Andy Horton 4 June 2012 A rockpooling visit to Worthing Pier on a low (0.4 metres) spring tide produced a surprise Brittlestar as well as some infrequent summer occurences like two large Velvet Swimming Crabs, Necora puber, a handful of small Common Hermit Crabs, Pagurus bernhardus, in winkle shells, a single Common Starfish Asterias rubens, one Dahlia Anemone, Urticina felina, one small Long-legged Spider Crab Macropodia rostrata, and one sub-adult 5-Bearded Rockling, Ciliata mustela. A Greater Pipefish, Syngnathus acus, was rescued from the beak of a Herring Gull. Daisy Anemones, Cereus pedunculatus, were frequently found in chocolate brown hues. Snakelocks Anemones, Anemonia viridis, were common as usual with frequent Beadlet Anemones Actinia equina. Full Rockpooling Report http://www.glaucus.org.uk/LancingBeach2008.htm#4June (This came out like a list: I must be a bit tired.)

David Hill David Hill Andy - went on a Bioblitz on Saturday at Cemlyn Bay (north coast of Anglesey) and today rockpooling at Llanddulas (north Wales coast) - lots of interesting new finds (for me anyway, fairly new to marine life). Cemlyn included Eel, 5-Bearded Rockling, Butterfish, Lobster and Great Scallop - a few pics here www.flickr.com/photos/natureseye/sets/72157630042354134/ and list of species here http://www.cofnod.org.uk/BioBlitz?ID=6 At Llanddullas this afternoon lots of Sea Gooseberries and a few Pipefish, pics to follow.

Andy Horton The Greater Pipefish did not look injured when collected, but I do not think it will survive. The gulls catch these pipefish occasionally and drop them in gardens.

Joe Bater that would have been a great UW macro photography day!

Andy Horton Not so good on the photography front. Pier causes shadows and low light. Capture and return. I hope to get a few shots later. I was terrestrial and the critters were under rocks. More though. The young rockpoolers (8 yo) are well informed now.

David Hill http://www.flickr.com/photos/natureseye/7340913120/

Penny Martin Plesae could you advise which crab this is? Thank you .

Bernard Picton There are two genera of small spider crabs in our area, Penny. Inachus and Macropodia. This is a Macropodia, but I don't think it's possible to distinguish them without detailed examination of the rostrum and antennae.

Bernard Picton Macropodia Leach, 1814 Macropodia deflexa Forest, 1978 Macropodia linaresi Forest & Z Alvarez, 1964 Macropodia rostrata (Linnaeus, 1761) Macropodia tenuirostris (Leach, 1814)

Bernard Picton Macropodia rostrata seems to be the commonest one.

Andy Horton I think this is Macropodia

Becky Hitchin Don't Inachus more often have sponges attached to them than Macropodia? Or is that just a local thiing down here?

Becky Hitchin Of course, always one that proves the rule!

Bernard Picton There are three Inachus species in Britain and Ireland, I think they all tend to have sponges on them, whilst Macropodia decorates itself with weeds and hydroids.

Andy Horton http://www.glaucus.org.uk/Macropod.htm

Ian Macleod Young spider crab !! In a message dated 12/02/2012 13:38:11 GMT Standard Time,

Penny Martin Thank you ..... lots seen on this dive and they all looked slightly different .... some much chunkier than others and many covered with seaweed !

Ian Macleod Hi Penny. They are like us, they change as they grow up !! Lolololol. Ian In a message dated 12/02/2012 18:26:48 GMT Standard Time,

Andy Horton It might not be fully grown, but it is not a baby. They do not grow all that large.

Animalia (Kingdom)
  Arthropoda (Phylum)
    Crustacea (Subphylum)
      Malacostraca (Class)
        Eumalacostraca (Subclass)
          Eucarida (Superorder)
            Decapoda (Order)
              Pleocyemata (Suborder)
                Brachyura (Infraorder)
                  Eubrachyura (Section)
                    Heterotremata (Subsection)
                      Majoidea (Superfamily)
                        Inachidae (Family)
                          Macropodia (Genus)
                            Macropodia rostrata (Species)
Associated Species