comment added about 4 years ago by Katja Seltmann
cercus does not have muscles so removed reference to muscles in definition.
Reference: Miko, I., M. Bertone, M. Yoder, A. Deans, S. Katja, N. Johnson, S. Brady, P. Ward, F. Ronquist, E. Talamas, L. Krogmann, L. Vilhelmsen, C. Rasmussen, G. Broad, A. Lucky, and B. G. 2010. HAO/Biosync working meeting II..
Cross reference: None provided.