Petriellaea T.N.Taylor, G.M.Del Fueyo & E.L.Taylor, 1994 genus doubtful

Rochipteris R.Herbst, A.Troncoso & S.Gnaedinger, 2001 genus doubtful

Kannaskoppifolia J.M.Anderson & H.M.Anderson, 2003 genus synonym

Kannaskoppianthus J.M.Anderson & H.M.Anderson, 2003 genus doubtful

Kannaskoppia J.M.Anderson & H.M.Anderson, 2003 genus doubtful

Rudixylon B.Bomfleur, A.-L.Decombeix, A.B.Schwendemann, I.H.Escapa, E.L.Taylor, T.N.Taylor & S.McLoughlin, 2014 genus doubtful