Crustose Lichens are among my favourite organisms and I really love them.
Unfortunately my camera broke some time ago and I haven’t been able to replace it yet. The last few years have been just horrible and haven’t gotten me any further. I really hope that I will be able to document beautiful and rare lichens for iNaturalist again soon.
Here are some of my own observations from Germany that I really like:
Calogaya spec.: https://www.inaturalist.org/observations/74862222
Candelariella medians: https://www.inaturalist.org/observations/74663750
Diploschistes scruposus: https://www.inaturalist.org/observations/49247842
Graphidaceae spec.: https://www.inaturalist.org/observations/76636645
Lecidea spec.: https://www.inaturalist.org/observations/50679013
Rhizocarpon alpicola: https://www.inaturalist.org/observations/49070435
Rhizocarpon lecanorinum: https://www.inaturalist.org/observations/49076885
Teloschistaceae: https://www.inaturalist.org/observations/51852720
Variospora flavescens: https://www.inaturalist.org/observations/52616422
Xanthomendoza borealis: https://www.inaturalist.org/observations/52273535
Xanthoparmelia conspersa: https://www.inaturalist.org/observations/47346000
Xanthoparmelia spec.: https://www.inaturalist.org/observations/74665955
Of course there are so many more beautiful and interesting crustose lichen species from all around the world…
Graphidaceae, French Guiana: https://www.inaturalist.org/observations/144123180
Lecanoromycetes spec., Antarctica: https://www.inaturalist.org/observations/37208056
Here is the amazing genus Stellarangia from the Namib Desert and a similar looking lichen from the Atacama Desert in Chile:
Stellarangia elegantissima: https://www.inaturalist.org/observations/18882566
Teloschistaceae spec., Atacama: https://www.inaturalist.org/observations/75681785, https://www.inaturalist.org/observations/97097321
It always hurts me when people destroy lichens with high-pressure cleaners or other means, they are wonderful organisms.
Of course, the entire variety of lichen species is even more colorful and richer in form than just the species that are called crustose lichens, but oh well, there would certainly be hundreds more species worth mentioning.