Below are lichenology websites of interest.
ITALIC 7.0, the information system on Italian lichens. https://italic.units.it/
The lichens collection (KRAM L) in Poland. https://rcin.org.pl/dlibra/collectiondescription/546?language=en
Consortium of North American Lichen Herbaria. https://lichenportal.org/cnalh/
Consorcio de Herbarios de Líquenes en América Latina. https://lichenportal.org/chlal/
GLOBAL IUCN Lichen Checklist. https://lichenportal.org/cnalh/projects/index.php?pid=556
Photographic gallery
http://timwheelerphotography.com/
http://www.seaveyfieldguides.com/Lichens/index.html
https://www.tropicallichens.net/
http://www.lichensmaritimes.org/
https://www.irishlichens.ie/
https://cms.botany.org/home/resources/navigation-guide-to-cyberinfrastructure-tools-for-systematics-research.html
https://www.sharnoffphotos.com/lichens/lichens_home_index.html
https://sites.google.com/site/liquenesdevenezuela/home/11-enlaces-importantes
http://www.lichenicolous.net/
http://www.britishlichens.co.uk
https://italic.units.it/?procedure=images
University of Oslo Lichen Herbarium
https://nhm2.uio.no/lav/web/index.html
Recent Literature on Lichens
https://nhm2.uio.no/botanisk/lav/RLL/RLL.HTM
Lichen determination keys
http://www.mycology.net/Content/MNetContent.cfm?MID=133
https://archive.bgbm.org/BGBM/STAFF/Wiss/Sipman/keys/default.htm
https://italic.units.it/?procedure=idkeys