Which genus contains more species, Bursera or Xanthoceras?
Bursera Bursera, named after the Danish botanist Joachim Burser (1583-1639), is a genus with about 100 described species of flowering shrubs and trees varying in size up to 25 m high. They are native (often for many species endemic) to the Americas, from the southern United States south through to northern Argentina, in tropical and warm temperate forest habitats.
Calycoceras asiaticum Calycoceras asiaticum is an extinct cephalopod species belonging to the subclass Ammonoidea and family Acanthoceratidae.