Folia Cryptog. Estonica, Fasc. 57: 101–132 (2020) https://doi.org/10.12697/fce.2020.57.11 The lichens of the northern shore of the Gulf of Finland in the limits of St. Petersburg, Russia – diversity on the edge of the megapolis Irina S. Stepanchikova1,2, Dmitry E. Himelbrant1,2, Ekaterina S. Kuznetsova1,2, Jurga Motiejūnaitė3, Sergey V. Chesnokov2, Liudmila A. Konoreva2,4, Ludmila V. Gagarina2 1St. Petersburg State University, Universitetskaya emb. 7–9, 199034 St. Petersburg, Russia. E-mails:
[email protected],
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[email protected] 2Laboratory of Lichenology and Bryology, Komarov Botanical Institute RAS, Professor Popov St. 2, 197376 St. Petersburg, Russia. E-mail:
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[email protected] 3Laboratory of Mycology, Institute of Botany, Nature Research Centre, Žaliųjų Ežerų 49, LT–08406 Vilnius, Lithuania. E-mail:
[email protected] 4Polar-alpine Botanical Garden-Institute, 184250 Murmansk Region, Kirovsk. E-mail:
[email protected] Abstract: We present a lichen checklist for the northern shore of the Gulf of Finland in the limits of St. Petersburg, Russia. This area has diverse lichen biota within the city limits, and has been comprehensively studied since 1893, which gives a good base for analysis of historical changes in lichen diversity. The documented lichen biota comprises 469 species (430 lichenized, 24 lichenicolous, 3 facultatively lichenicolous, and 12 non-lichenized saprobic fungi), of them 191 species are known from herbaria and literature for the period before 1991, and 436 species were recorded since 1991 to 2019. Thirty-three taxa were excluded from the lichen list of the study area as erroneous or dubious records.