text:  Disagreement exists as to whether Attalea should be considered a single genus , or a group of related genera . In their 1996 Field Guide to the Palms of the Americas , Andrew Henderson , Gloria Galeano and Rodrigo Bernal combined all the species in the subtribe Attaleinae ( as it was then defined ) into a single genus , Attalea . In his 1999 Taxonomic Treatment of Palm Subtribe Attaleinae , American botanist Sidney F. Glassman divided the group into five genera — a more narrowly defined Attalea , Orbignya , Maximiliana , Scheelea and Ynesa . Rafäel Govaerts and John Dransfield recognised a single genus in their 2005 World Checklist of Palms , and Jean @-@ Christophe Pintaud continued this usage in his 2008 review of the genus . 
  