Order HETEROMYOTA Fisher, 1946
Introduction
In the Heteromyota, the longitudinal musculature of the body wall lies external to the circular musculature. Nephridia are numerous and unpaired, and large anal vesicles are present. The order contains a single family, the Ikedidae.
General References
Edmonds, S.J. 2000. Phylum Echiura. pp. 353-374 in Beesley, P.L., Ross, G.J.B. & Glasby, C.J. (eds). Polychaetes & Allies: The Southern Synthesis. Fauna of Australia Vol. 4A Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula. Melbourne : CSIRO Publishing Vol. 4 Part A xii 1-465 pp.