extinct genus fungus family order present contains single species known single specimen collected amber area dominican_republic fruit body fungus convex cap diameter spaced gills underside curved stipe smooth cylindrical measuring thick long lacks ring resembles extant currently living species genus known fungus species known fossil record second described dominican amber discovery classification genus known specimen single fruit body mushroom currently residing private collection owned italy specimen collected amber mines area island hispaniola dominican_republic amber believed date stage million years present studied group researchers consisting harvard_university colleagues published type description generic derived combination latin meaning modern genus resembles specific epithet coined authors latin amber reference mode preservation reported species fossil fungus described species known amber mines dominican_republic fourth species older cretaceous age publication fifth extinct species minimum age order pushed approximately description single fruit body associated structures preserved piece clear light yellow polished amber approximately wide diameter convex shape sporting raised central region pale flesh appears yellowish amber smooth glossy changing slightly translucent margin margin slightly gills underside broadly attached stipe spaced gills extend completely margin stipe length gills short gills reach edge stipe margin varying lengths centered curved stipe smooth cylindrical measuring thick long stipe lacks ring mushroom preserved small liquid gas filled bubble possibly originating mushroom indicates amber solid sealed colleagues publication placed subfamily time considered family currently classified family placement based solely visible structures fruit body features typically classify species fungal families based microscopic features visible preserved amber specimen consequently assignment provisional authors note certain similarities extant members describing authors leave open option treating genus placement uncertain placement distinct amber preserved mushroom taxa surface gills
Protomycena