Helgoländer Meeresuntersuchungen

, Volume 45, Issue 4, pp 487–492 | Cite as

An alternative mode of larval development inScoloplos armiger (O. F. Müller, 1776) (Polychaeta, Orbiniidae)

  • S. Plate
  • E. Husemann


During a three-year plankton monitoring at the island of Helgoland (German Bight, North Sea), pelagic larvae ofScoloplos armiger (O. F. Müller, 1776) were observed to occur regularly from February to April. Up to the present day, only benthic development within egg cocoons has been described (Anderson, 1959). Planktonic larvae comprise early, ovoid trochophores up to advanced stages with 11 setigers. The main morphological difference between the two larval types is the more numerous differentiation of lateral cilia by the pelagic larvae. Annual alterations in appearance and abundance suggest that reproduction is correlated with water temperature.

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Copyright information

© Biologische Anstalt Helgoland 1991

Authors and Affiliations

  • S. Plate
    • 1
    • 2
  • E. Husemann
    • 1
    • 2
  1. 1.AG Entwicklungsphysiologie der TiereRuhr-Universität Bochum, Lehrstuhl für spezielle Zoologie und ParasitologieBochum 1Federal Republic of Germany
  2. 2.Biologische Anstalt Helgoland, MeeresstationHelgolandFederal Republic of Germany

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