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Myrianida pinnigera

(Montagu, 1808)


Richard Yorke Can anyone help with this worm. I feel sure I have seen it in "Marine fish & invertebrates of Northern Europe" but unfortunately I don't have a copy. I took the picture off the Isle of Muck, NW Scotland on a wall.

David Kipling Ah yes, that one - very striking colour! I've only ever seen the end of a disappearing one as by-catch on a photo. How big was this Richard, do you recall?

Andrew Mackie Myrianida pinnigera, I think - with stolons. It is an autolytin syllid polychaete.

David Kipling What does pinnigera mean? I've seen it as a species name for several genera (eg Thecacera pinnigera, the spotty nudi).

Andrew Mackie I think it means 'bearing pinnae'

João Pedro Silva Thecacera pEnnigera, David :) Only saw this worm once. Well.. saw it in the photo much later: http://www.flickr.com/photos/jpsilva1971/5764153779/

Andrew Mackie Arne Nygren has M. fasciata as synonym of M. pinnigera. See http://www.marinespecies.org/aphia.php?p=sourcedetails&id=23023

João Pedro Silva As for the latin, pinnigera should come from pinna as flap/wing/feather, and most probably aludes to the flaps on the sides or the feathered overall aspect of the animal.

Richard Yorke Thanks very much. The length of this one was about 4" (sorry, showing my age! 10cm). You can just see the edge of a smallish sea loch anemone on the left side to give you a rough scale. Reading about it, the thin 'tail' is a chain of asexually produced offspring so the worm itself is only 3cm or 4cm long. The youngest offspring is obviously nearest the worm, and they get bigger as they get older (quite visible in this picture) until they break off and become independent.

David Kipling So what does pennigera mean then João Pedro? I see it referred to as the 'winged' Thecacera, so perhaps same derivation?

Andrew Mackie I would think pennigera and piningera mean the same

João Pedro Silva Yes, they do mean the same. Actually, "pen" has the same origin (~feather/plume). The word for feather in Portuguese is still "pena".

Message posted on Seasearch Identifications on 22 Sep 2013
Taxonomy
Animalia (Kingdom)
  Annelida (Phylum)
    Polychaeta (Class)
      Aciculata (Subclass)
        Phyllodocida (Order)
          Nereidiformia (Suborder)
            Syllidae (Family)
              Autolytinae (Subfamily)
                Myrianida (Genus)
                  Myrianida pinnigera (Species)
Associated Species