Published in Biol Bull, in 1962, in volume 122, pages 232-251

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

Published in Palaeontology, in 1970, in volume 13, issue 2, pages 261-288

Created: 2016-04-23, modified: 2016-04-23

Published in Annals And Magazine of Natural History, in 1889, in volume 4, pages 103-104

Created: 2011-09-23, modified: 2011-09-23

Published in The Great Basin Naturalist, in 1984, in volume 44, pages 99-103

Created: 2017-11-16, modified: 2017-11-16

Published in Proceedings of The Biological Society of Washington, in 2000, in volume 113, pages 900-917

Created: 2011-07-27, modified: 2011-07-27

Published in Proceedings of The Biological Society of Washington, in 1991, in volume 104, issue 4, pages 840-869

Created: 2011-09-09, modified: 2012-05-06