Published in Gardens' Bulletin, Singapore, in 2005, in volume 57, issue 1, pages 7-11

Created: 2014-06-20, modified: 2016-08-11

Published in Paleontological Research, in 2000, in volume 4, pages 275-301

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

Published in Bulletin of the British Museum (Natural History). Geology., in 1973, in volume 22, issue 6, pages 421-482

Created: 2015-09-22, modified: 2021-05-13