Published in Zoological Science, in 1990, in volume 7, pages 327-330

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

Published in Zoological Science, in 1991, in volume 8, pages 187-191

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

Published in Biol Bull, in 1995, in volume 189, pages 148-158

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