 The species was found in the Brazilian semi @-@ arid region in the National Park of Catimbau , in July 2007 . It was described as new to science in a 2010 Mycotaxon publication by Felipe <unk> of the Universidade Federal de Pernambuco . L. rupestris is one of 19 species of Lactarius known from Brazil . The epithet rupestris refers to the <unk> <unk> montane savanna — the ecoregion where the type species was collected . 
