Published in Biol Bull, in 2005, in volume 208, pages 12-19
Created: 2010-01-07, modified: 2011-06-21![](https://www.biodiversitylibrary.org/pagethumb/40504444,60,60)
Published in Zoological Science, in 1989, in volume 6, pages 283-288
Created: 2012-09-19, modified: 2012-09-19![](https://www.biodiversitylibrary.org/pagethumb/40520885,60,60)
Published in Zoological Science, in 1992, in volume 9, pages 569-573
Created: 2012-09-19, modified: 2012-09-19![](https://www.biodiversitylibrary.org/pagethumb/1529212,60,60)
Published in Biol Bull, in 2002, in volume 202, pages 213-222
Created: 2010-01-07, modified: 2011-06-21