Published in Palaeontology, in 1995, in volume 38, issue 2, pages 241-257
Created: 2016-04-23, modified: 2016-04-23
Published in Palaeontology, in 1983, in volume 26, issue 1, pages 71-92
Created: 2016-04-23, modified: 2016-04-23
Published in Acta Botánica Mexicana, in 2009, in volume 89, pages 87-124
Created: 2016-05-12, modified: 2017-04-27