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  1. Spirorbis (Spirorbis) spirorbis - Wikipedia

  2. Spirorbis spirorbis - Wikipedia

  3. WoRMS - World Register of Marine Species - Spirorbis spirorbis ...

  4. NDFF Verspreidingsatlas | Anisus spirorbis - Spiraal-schijfhoren

  5. Spirorbis - Wikipedia

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    Spirorbis is a genus of very small (2–5 mm (0.079–0.197 in)) polychaete worms, usually with a white coiled shell. Members of the genus live in the lower littoral and sublittoral zones of rocky shores. Spirorbis worms usually live attached to seaweeds, but some species live directly on rocks, shells or other hard substrates.
    en.wikipedia.org
    Spirorbis spirorbis are cross fertilising hermaphrodites, who brood their young in a tube attached to the worm inside the shell. The larvae are released at an advanced stage of development and spend just a few hours as free-living organisms before attaching themselves to the nearest suitable surface, often the same seaweed as the parent.
    The ‘ Spirorbis ’ problem of multiple life habitats is solved: microconchid worm larvae can settle anywhere where currents exist along a coastline and as far inland as storm surges can go, but they only thrive within true marine conditions and are not freshwater fauna.
    In his reconstruction of the paleogeography of the lower Conemaugh Group, using data from over 2800 control points across the northern portion of the basin, Morris showed how facies containing ‘ Spirorbis ’ were found between fully marine and continental facies along a regional transect.
  7. | Nederlands Soortenregister - Nederlandse soorten

  8. The ‘Spirorbis’ problem revisited: Sedimentology and biology of ...

  9. Spirorbis spirorbis - strandwerkgemeenschap.nl

  10. Spirorbis - Wikipedia

  11. Spirorbis (Spirorbis) rupestris - Wikipedia