Geastrum dolomiticum, a new earthstar species from Central Europe

Abstract The recently revised Geastrum minimum species complex in sect. subsect. Quadrifida revealed that the name G. is a nomen ambiguum and dubium was collectively used for at least two European (viz. granulosum marginatum ). During morphological revision of Hungarian materials labelled as , different crystal structures were found on endoperidial body some specimens than those characteristic . These collections exclusively open rocky grassy vegetation dolomite bedrock Hungary. Multigene phylogenetic analyses involving nrITS, nrLSU, rpb 1, atp 6 tef 1-α sequences with unique morphology ecology these form distinct clade close relationship s.l. (i.e. from Europe North America). Based molecular evidence, macro- micromorphology well X-ray Powder Diffraction (XRD) characterisation mesoperidial crystals, here we propose new dolomiticum