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Strigula  sensu lato has been previously defined based on phenotype characters as a rather broad genus including tropical to temperate species growing on a wide array of substrata. In this study, based on a multilocus phylogenetic approach, we show that foliicolous species form six well-delimited clades that correlate with diagnostic phenotype features, including thallus morphology, carbonization of the involucrellum and excipulum, ascospore dimensions, and type of macroconidia. Given the topology, with five of the six clades emerging on long stem branches, and the strong phenotypical differentiation between the clades, we recognize these at the genus level, making mostly use of previously established genus names. Four genera, namely  Phylloporis ,  Puiggariella ,  Raciborskiella , and  Racoplaca , are resurrected for the  S. phyllogena ,  S. nemathora ,  S. janeirensis , and  S. subtilissima  groups, respectively, whereas one new genus,  Serusiauxiella  gen. nov., is introduced for a novel lineage with peculiar macroconidia. The only sequenced non-foliicolous species,  S. jamesii , is not closely related to these six foliicolous lineages but clusters with  Flavobathelium  and  Phyllobathelium , revealing it as an additional undescribed genus-level lineage being treated elsewhere. Within the new genus  Serusiauxiella , three new species are described:  Serusiauxiella filifera  sp. nov.,  S. flagellata  sp. nov., and  S. sinensis  sp. nov. In addition, ten new combinations are proposed:  Phylloporis austropunctata  comb. nov.,  P. radiata  comb. nov.,  P. vulgaris  comb. nov.,  Puiggariella confluens  comb. et stat. nov.,  P. nemathora  comb. nov.,  P. nigrocincta  comb. nov.,  Racoplaca maculata  comb. nov.,  R. melanobapha  comb. nov.,  R. transversoundulata , and  R. tremens  comb. nov. We also report on a peculiar, previously unrecognized growth behaviour of the macroconidial appendages in  Strigula  s.lat.

Reallocation of foliicolous species of the genus Strigula into six genera (lichenized Ascomycota, Dothideomycetes, Strigulaceae)