The genus Scoliciosporum A. Masssal., now included in its own family Scoliciosporaceae, contains c. 15 species in temperate and subtropical areas. It somehow resembles Micarea, differing in the Lecanora-type asci, the large-celled photobiont, and the paraphyses with a dark cap. S. pruinosum deviates in several important characters, including ascus-type, and will be probably transferred to another genus. According to Miadlikowska & al. (2014), Scoliciosporum intrusum does not belong to this genus, and is better provisionally treated as a member of Micarea.
The present key includes all species of Scoliciosporum hitherto reported from Italy (Nimis 2016), plus a few species reported from neighbouring countries in the Alps (see Nimis & al. 2018), whose presence in Italy is probable, for a total of 8 species.

References

Miadlikowska J., Kauff F., Högnabba F., Oliver J.C., Molnár K, Fraker E., Gaya E., Hafellner J., Hofstetter V., Gueidan C., Otálora M.A.G., Hodkinson B., Kukwa M., Lücking R., Björk C., Sipman H.J.M., Burgaz A.R., Thell A., Passo A., Myllys L., Goward T., Fern 2014. A multigene phylogenetic synthesis for the class Lecanoromycetes (Ascomycota): 1307 fungi representing 1139 infrageneric taxa, 317 genera and 66 families. Mol. Phylogenet. Evol., 79: 132-168.
Nimis P.L. 2016. The lichens of Italy. A second annotated catalogue. EUT, Trieste, 740 pp.
Nimis P.L., Hafellner J., Roux C., Clerc P., Mayrhofer H., Martellos S., Bilovitz P.O. 2018. The Lichens of the Alps. An Annotated Catalogue. Mycokeys, 31: 1-634.

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