Published in Biol Bull, in 1987, in volume 172, pages 212-224

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

Published in Biol Bull, in 1988, in volume 175, pages 372-377

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

Published in Paleontological Research, in 2000, in volume 4, pages 53-55

Created: 2013-02-27, modified: 2013-02-27

Published in Paleontological Research, in 1997, in volume 1, pages 100-109

Created: 2013-02-27, modified: 2013-02-27

Published in Pacific Science, in 1960, in volume 14, issue 3, pages 257-266

Created: 2017-09-10, modified: 2017-09-10