The evolution of the pelagic alciopid and phyllodocid polychaetes.
Article first published online: 20 AUG 2009
1955 The Zoological Society of London
Proceedings of the Zoological Society of London
Volume 125, Issue 2, pages 411–420, August 1955
How to Cite
Dales, R. P. (1955), The evolution of the pelagic alciopid and phyllodocid polychaetes. Proceedings of the Zoological Society of London, 125: 411–420. doi: 10.1111/j.1096-3642.1955.tb00607.x
- Issue published online: 30 OCT 2009
- Article first published online: 20 AUG 2009
- Received 28th July 1954
The morphological adaptations of the alciopid and lopadorhynchine polychaetes for a pelagic mode of life are compared, with particular reference to the organs concerned with feeding and reproduction. Both groups are predatory, but feed in different ways; Lopadorhynchus has poorly-developed eyes but long cirri, anterior segments modified for grasping, and large pharyn-geal glands; alciopids have large eyes and the most advanced have long eversible proboscides. Many alciopids have evolved a copulatory mechanism whereby the sperm are transfered to the female which stores them in receptacula until required. The phylogenetic relationships of the different genera are briefly described.