Evolution of body wall musculature.

  title={Evolution of body wall musculature.},
  author={G{\"u}nter Purschke and Monika C. M. M{\"u}ller},
  journal={Integrative and comparative biology},
  volume={46 4},
A body wall musculature comprising an outer layer of circular fibers and an inner layer of longitudinal fibers is generally seen as the basic plan in Annelida. Additional muscles may be present such as oblique, parapodial, chaetal, and dorsoventral muscles. The longitudinal muscle fibers do not form a continuous layer but are arranged in distinct bands in polychaetes. Mostly there are four to six bands, usually including prominent ventral and dorsal bands. However, other patterns of muscle band… CONTINUE READING


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