A number of species have been placed into their own sub-genera or groups depending on taxonomists. Species formerly considered Fp. gardneri have been separated into several groups and some described as stand-alone species.
|Fp. deltaense||Fp. arnoldi||Fp. gardneri complex|
|Fp. fallax||Fp. filamentosus||Fp. mirabilis Group|
|Fp. gulare||Fp. robertsoni||Fp. ndianum Group|
|Fp. powelli||Fp. rubrolabialis||Fp. scheeli|
|Fp. schwoiseri||Fp. walkeri|