Seison — Acanthocephala

  • Peter Ax


There are only two species — Seison annulatus and S. nebaliae — that live as epibionts on crustaceans of the taxon Nebalia (Leptostraca, Malacostraca). As microscopic organisms of 1–2 mm in length their appearance is unmistakable, with a weakly swollen head, extremely long neck with sections that retract like a telescope, a thickened trunk, and the foot with a terminal adhesive disk (Fig. 17A). Equally unique are the slow waving movements over the host while being anchored by the foot — and occasional change of location in the manner of a spanworm.


Ventral Valve Ciliary Band Ground Pattern Cement Gland Planktotrophic Larva 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Peter Ax
    • 1
  1. 1.Institute for Zoology and AnthropologyUniversity of GöttingenGöttingenGermany

Personalised recommendations