A description is provided for Thecaphora thlaspeos , which destroys seeds of Brassicaceae. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (South Korea, Austria, Bulgaria, Finland, Germany, Hungary, Italy, Norway, Romania, Slovakia, Sweden and Switzerland) and hosts ( Alyssum reiseri, Arabis alpina, Arabis corymbiflora, Arabis hirsuta, Arabis sagittata, Arabis serrata var. hallaisanensis, Cardamine bellidifolia, Cardaminopsis petraea ( Arabis petraea ), Draba aizoides, Draba alpina, Draba incana, Erysimum diffusum, Erysimum weltschevii, Thlaspi alpestre, Thlaspi alpinum, Thlaspi brachypetalum ( Thlaspi caerulescens subsp. brachypetalum ) and Thlaspi caerulescens ).