Coptosapelteae is a tribe incertae sedis of flowering plants in the Rubiaceae family and contains about 55 species in 2 genera. Its representatives are found in tropical and subtropical Asia. This tribe has not been placed within as subfamily of Rubiaceae, but is sister to the rest of the family.
 The Rubiaceae family contains about 55 species in 2 genera
Coptosapelteae is in the Rubiaceae family and contains about 55 species in 2 genera on its own. Rubiaceae  must have others in its family as on if it didn't there would be no need for a sister, it would just be under the one family.