Piprisoma Blyth, J. A. S. B., xiii, p. 394 (1844). Type, Piprisoma squalidum Burton.
The genus Piprisoma is very close to Prionochilus, from which it differs in having nine instead of ten primaries. In this genus the bill is similar to that of Acmonorhynchus but shorter, and viewed from above it is nearly an equilateral triangle with the sides sinuated. The sexes are alike.