Early in 1927, Prof. J. S. Lee erected the genus Boultonia, the genotype ofwhich is Boultonia willsi. In the same publication, he described another species Boultonia rawi from the Penchi Series of the Moscovian age. This latter specieshas been afterwards transferred by various authors to Wedekindellina. Later in1934, Prof. S. Chen described a new species of Boultonia, B. cylindrica, from the Maping Limestone of Southwest China.
