Image from the NFDI4BIOIMAGE Calendar October 2025. As part of the MibiNet SFB 1535 project (https://www.sfb1535.hhu.de), this lichen was collected in the Northern Eifel region, between Blankenheim and Schmidtheim in Germany. Lichens are among the most successful examples of complex mutualistic symbiosis, where a fungus (mycobiont) forms an association with one or more photosynthetic organisms (photobionts), including green algae and/or cyanobacteria. Based on ITS analysis, the lichen shown has been identified as Peltigera neckeri. Lichens of the genus Peltigera are classified as cyanolichens due to their symbiotic association with a cyanobacterial photobiont of the genus Nostoc. The image shows the lichen's blue-gray thallus when wet, after its collection on a mossy stone. Research project MibiNet SFB 1535 Project B02 Recording date; time 2023-10-28; 12:21 CEST Location Northern Eifel, between Blankenheim and Schmidtheim, Germany Environmental conditions Cloudy, slightly rainy Temperature 14°C Organism Peltigera neckeri Organism attribute Cyanolichen, foliose Mycobiont Peltigera Photobiont Nostoc Substrate Moss Camera Apple iPhone 12 Objective iPhone 12 back dual wide camera 4.2mm f/1.6 Size 4,032 x 3,024 px Submitted via NFDI4BIOIMAGE