The post-embryonic development of British Pinnotheres (Crustacea)
Article first published online: 7 MAY 2010
1955 The Zoological Society of London
Proceedings of the Zoological Society of London
Volume 124, Issue 4, pages 687–715, February 1955
How to Cite
Atkins, D. (1955), The post-embryonic development of British Pinnotheres (Crustacea). Proceedings of the Zoological Society of London, 124: 687–715. doi: 10.1111/j.1469-7998.1955.tb07811.x
- Issue published online: 6 JUL 2010
- Article first published online: 7 MAY 2010
- Received 8th February 1954
The early stages of the two species of Pinnotheres occurring at Plymouth have been reared in the laboratory from egg to megalopa for the first time.
P. pisum has four zoeal stages and a megalopa. The megalopal stage was reached in eleven weeks from spawning and six from hatching. These times are probably considerably longer than under natural conditions. The number of swimming setae of the zoeal stages is discussed.
P. pinnotheres has two zoeal stages and a megalopa. The megalopal stage was reached in about nine weeks from early egg and three weeks from hatching. The work on P. pinnotheres confirms that of Lebour (1928 a, b), who obtained the two zoeal stages from the plankton and reared the megalopa from these.
Some observations are given on habits and moulting of the zoeae.