What is "scaphopetalum"

Scaphopetalum is a genus previously classified under the plant family Sterculiaceae. Currently, under the APG II system the genus is placed under the subfamily Byttnerioideae of the family Malvaceae senso lato. The distribution of the genus is restricted to the rain forests of Africa. In total 26 taxa have been described, 21 have been recognized (20 species and 1 variety), two invalid and one nomen nudus (without a formal description).