The phylogenetic analysis of the Trapeliaceae by Resl & al. (2015) rejected the monophyly of the genus Rimularia Nyl. as traditionally circumscribed. Rimularia s.str. (around the type species R. limborina) forms a basal group with Trapeliaceae, while 11 species were placed in the genus Lambiella Hertel, originally described as monotypic for L. psephota, which differs in molecular characters, in the presence of depsidones, and perhaps in the apical apparatus of the asci, being presently placed in the Xylographaceae. The species were monographed by Hertel & Rambold (1990). British species were treated by Fryday (1999) and Cannon & al. (2021). A useful key was published by Wirth & al. (2013).
The present key includes all species of the two genera known to occur in Italy (Nimis 2016), plus a few species reported from neighbouring countries and to be looked for in Italy, for a total of 7 species.

References

Cannon P., Fryday A., Spribille T., Coppins B., Vondrák J., Sanderson N., Simkin J. 2021. Baeomycetales: Xylographaceae, including the genera Lambiella, Lithographa, Ptychographa and Xylographa. Revisions of British and Irish Lichens, 17: 1-11.
Fryday A.M. 1999. The genus Rimularia Nylander in the British Isles. Bull. Brit. Lichen Soc. 84: 18-21.
Hertel H., Rambold G. 1990. Zur Kenntnis der Familie Rimulariaceae (Lecanorales). Bibl. Lichenol., 38: 145-189.
Nimis P.L. 2016. The lichens of Italy. A second annotated catalogue. EUT, Trieste, 740 pp.
Resl P., Schneider K., Westberg M., Printzen C., Palice Z., Thor G., Fryday A., Mayrhofer H., Spribille T. 2015. Diagnostics for a troubled backbone: testing topological hypotheses of trapelioid lichenized fungi in a large-scale phylogeny of Ostropomycetidae (Lecanoromycetes). Fungal Divers., 73: 239-258.
Wirth V., Hauck M., Schultz M. 2013. Die Flechten Deutschlands. Stuttgart, Ulmer. 2 voll., 1244 pp.

Last modified: October,5, 2023

Project Dryades, Department of Life Sciences, University of Trieste - CC BY-SA 4.0