The fungal form-genus Reduviasporonites includes the range of morphology found in type and other material from Oklahoma and numerous well-preserved specimens from Italy and elsewhere. Chordecystia Foster 1979 and Tympanicysta Balme 1980 are both junior synonyms of Reduviasporonites Wilson 1962. Species include Reduviasporonites catenulatus Wilson 1962, Reduviasporonites chalastus (Foster 1979) comb. nov., and Reduviasporonites stoschianus (Balme 1980) comb. nov. Reduviasporonites has morphologic characteristics similar to the modern pathogen Rhizoctonia.