Thucidiaceae Hern.-Cast., G.W. Rothwell & G. mapes 2001
Voltzialean plants with ovulate pre-cones comprising a compound cone-like zone of axillary dwarf shoots between proximal and distal 'vegetative zones'; ovuliferous dwarf shoots bilateral, with a zone of several sterile scales subtending a fan of 3 to 4 uniovulate sporophylls; ovules inverted.