Published in Biol Bull, in 1957, in volume 112, pages 358-362

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

Published in Zoological Science, in 1990, in volume 7, pages 541-545

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

Published in Proceedings of the United States National Museum, in 1886, in volume 9, pages 225-229

Created: 2010-01-14, modified: 2017-01-06