Thalloidima squamatum comb. nov. a distinct and common but overlooked lichen in Europe

• Published in: Plant and Fungal Systematics
• Main Authors: Westberg, Martin, Ekman, Stefan, Brigel-Williams, L., Fernandez-Brime, Samantha, Wedin, Mats, Timdal, Einar
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polska Akademia Nauk * Instytut Botaniki im. W. Szafera,Polish Academy of Sciences, W. Szafer Institute of Botany 2024
• Subjects: Greenland; Norway
• Online Access: http://hdl.handle.net/10852/106761; https://doi.org/10.35535/pfsyst-2023-0019

The new combination Thalloidima squamatum is proposed for a morphologically and phylogenetically distinct species, until now included within the variation of T. sedifolium. Compared to T. sedifolium, the species is characterized by its larger squamules and apothecia, shorter ascospores, the pale color of the excipulum, and its habitat growing on moss cushions over calcareous rock or directly on rock rather than on soil. Most of the material studied originates from Norway and Sweden, but specimens are also reported from Austria, Croatia, Germany, Greenland, Italy, Poland, Russia, Scotland and Switzerland.