Ultrastructure of the nuchal organ and cerebral organ in Onchnesoma squamatum (Sipuncula, Phascolionidae)
- G. Purschke, F. Wolfrath, W. Westheide
- Biology, MedicineZoomorphology
- 21 March 1997
The present findings do not support the view that the nuchal organs of Sipuncula and ”Polychaeta” are homologous, but instead suggest that they are convergent structures.