Gamundí, Irma J. creator Amos, Victoria text ag 2007 continuing spa 18 páginas Mycological explorations in Tierra del Fuego. A narration of the leading maritime and terrestrial expeditions in Fuegia during the XIX and XX centuries is approached from the point of view of the mycological exploration and published results on the mycobiota, emphazising the Argentine expeditions. Maps with the itinerary of main Argentine expeditions is given. An evaluation of the fungal diversity according to the previous review is presented, comparing the fungal records during both periods that shows duplication of the total number of taxa from 647 species described in XIX century to 1269 in the XX century. Simultaneously there is a decrease from 50.4 % to 19.7 % in the number of new species published. A list of collectors and a table with the state of ex-situ conservation of selected species is presented. A brief comment is given on conservation of habitats supporting fungal population that are disturbed by unsustainable exploitation of natural resources. fot. col., fot. byn, mapas, diagr, tbl. Hongos Exploración Micologica Estado de Conservación Ex Situ 0373-580X 238707 v. 42 n. 1-2 (2007) AR-ReUNN 260630 20260702003326.0 239586 spa