Do both Butea and Calanthe have just two species?
Butea Butea is a genus of flowering plants belonging to the pea family, Fabaceae. It is sometimes considered to have only two species, "B. monosperma" and "B. superba", or is expanded to include four or five species.
Calathus Calathus is a genus of ground beetle native to the Palearctic (including Europe), the Near East and North Africa.