Ptomaphagus barri, Ptomaphagus hazelae, Ptomaphagus fiskei, Ptomaphagus walteri, Ptomaphagus whiteselli, Ptomaphagus valentinei, Ptomaphagus hatchi, Ptomaphagus fecundus, Ptomaphagus episcopus, Ptoma

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith