Keys to the macrolichens and checklist of the lichens and lichenicolous fungi of New Guinea

New Guinea has the richest macrolichen flora of any tropical Asian country. Although the 1986 checklist mentions only relatively few endemics, increased research in especially the last decade of the last century has shown that many of the conspicuous macrolichens were undescribed and, indeed, endemic. There have been a few larger general publications and several smaller devoted to separate genera, and by now we can assume that most species are found and described. 1. Keys to the macrolichens To provide an overview of the current state of knowledge, a key to the macrolichens is provided here. This set of keys is mostly a compilation of published work by various authors, but contains some original keys for groups that were not yet treated in detail. The different sources of the keys has led to a rather varied terminology, which has not forcibly been homogenized. The key treats foliose and fruticose lichens, but not squamulose or crustose ones; some arguebly arbitrary choices as to inclusion have been made