Unitary nomenclature demands the use of a single name for pleomorphic fungi determined according to priority. For this reason combinations in Trichoderma are here provided for 46 species for which such a combination is lacking. Although many more such species are known, only those are included here that are dealt with in more recent papers and where some DNA data are available in GenBank, even if erroneous; for other species it is strongly recommended to consult databases like Index Fungorum or MycoBank. Information on types is provided for most species, and representative cultures, GenBank accessions for tef1 and rpb2 , and important references are given for all species.