• Protosphaeridium Timofeev, 1966 †
• Protosphaeridium ace Timofeev, 1966 †
• Protosphaeridium areolatum Andreeva, 1973 †
• Protosphaeridium charnium Timofeev et al., 1980 †
• Protosphaeridium corrugatum Andreeva, 1973 †
• Protosphaeridium flexuosum Timofeev, 1966 †
• Protosphaeridium intertextum Andreeva, 1973 †
• Protosphaeridium muirii Bliss in Walter et al., 1979 †
• Protosphaeridium paleaceum Timofeev, 1966 †
• Protosphaeridium petigenosum Andreeva, 1973 †
• Protosphaeridium pusillum Timofeev, 1966 †
• Protosphaeridium reticulatum Viswanathiah et al., 1980 †
• Protosphaeridium semiclausum Andreeva, 1973 †
• Protosphaeridium spumosum Andreeva, 1973 †
• Protosphaeridium torulosum Timofeev, 1966 †
• Protosphaeridium tuberculiferum Timofeev, 1966 †
• Protosphaeridium vermium Timofeev, 1966 †
• Protosphaeridium vesiculare Andreeva, 1973 †
• Protosphaeridium volkovae P.K. Maithy & M. Shukla †