Published in Zoological Science, in 1994, in volume 11, pages 713-716

Created: 2012-09-19, modified: 2012-09-19

Published in Zoological Science, in 1993, in volume 10, pages 983-990

Created: 2012-09-19, modified: 2012-09-19

Published in Biol Bull, in 1991, in volume 180, pages 485-488

Created: 2010-01-07, modified: 2011-06-21