Which Genus has more species Darmera or Roystonea ?
Roystonea Roystonea is a genus of eleven species of monoecious palms, native to the Caribbean Islands, and the adjacent coasts of Florida and Central and northern South America. Commonly known as the royal palms, the genus was named for Roy Stone, a U.S. Army engineer. It contains some of the most recognizable and commonly cultivated palms in tropical and subtropical regions.
Aristonectidae The Aristonectidae is a taxonomic family of poorly known plesiosaurs from the Jurassic and Cretaceous periods. They are closely related to polycotylid plesiosaurs. The family is made up of "Tatenectes", "Kimmerosaurus", "Aristonectes", and "Kaiwhekea". This group was formerly known as the Cimoliasauridae, but since "Cimoliasaurus" is indeterminate and quite possibly elasmosaurid, this replacement name was erected.