Publications

[Note: Publications resulting from oral presentations or posters are marked with an asterisk (*); edited books are marked with two asterisks (**)]

POELT, J. & OBERMAYER, W. 1990: Über Thallosporen bei einigen Krustenflechten. - Herzogia 8: 273 - 288.

POELT, J. & OBERMAYER, W. 1990: Lichenisierte Diasporen bei der Basidiolichene Multiclavula vernalis spec. coll. - Herzogia 8: 289 - 294.

*OBERMAYER, W. 1991: Mikrokristallisation - Eine zu Unrecht in Vergessenheit geratene Methode zur raschen Bestimmung von Flechten. - In: HAFELLNER, J., (Hsg.), 6. Österreichisches Botanikertreffen, Kurzf. Beitr.: 61. Graz.

POELT, J. & OBERMAYER, W. 1991: Beiträge zur Kenntnis der Flechtenflora des Himalaya II. Die Gattung Bryonora (Lichenes, Lecanoraceae) zugleich eine Revision aller Arten. - Nova Hedwigia 53: 1 - 26.

OBERMAYER, W. & POELT, J. 1992: Contribution to the knowledge of the lichen flora of the Himalayas III. On Lecanora somervellii PAULSON (Lichenized Ascomycotina, Lecanoraceae). - Lichenologist 24(2): 111 - 117.

GIRALT, M., OBERMAYER, W. & MAYRHOFER, H. 1993: Rinodina poeltiana spec. nova (lichenized Ascomycetes, Physciaceae), a new corticolous blastidiate species from Austria. - Herzogia 9: 709 - 714.

OBERMAYER, W. 1993: Die Flechten der Seetaler Alpen (Steiermark, Österreich). - Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark 123: 91 - 166.

GIRALT, M., MAYRHOFER, H. & OBERMAYER, W. 1994: The species of the genus Rinodina (lichenized Ascomycetes, Physciaceae) containing Pannarin in Eurasia with a special note on the taxonomy of Rinodina granulans. - Mycotaxon 50: 47 - 59. 

OBERMAYER, W. & POELT, J. 1994: Lecanora leptacinella, Lecidea polytrichina und Lecidea polytrichinella spec. nov., drei an acidophile Moose gebunden Flechten von arktisch(-alpin)er Verbreitung. - Acta Botanica Fennica 150: 131 - 142.

OBERMAYER, W. 1994: Die Flechtengattung Arthrorhaphis (Arthrorhaphidaceae, Ascomycotina) in Europa und Grönland. - Nova Hedwigia 58(3-4): 275 - 333.

OBERMAYER, W. 1994: Lichenotheca Graecensis Fasc. 1 (Nos 1 - 20). - Fritschiana 1: 3 - 7.

OBERMAYER, W. 1995: Lichenotheca Graecensis Fasc. 2 (Nos 21 - 40). - Fritschiana 3: 1 - 8.

HAFELLNER, J. & OBERMAYER, W. 1995: Cercidospora trypetheliza und einige weitere lichenicole Ascomyceten auf Arthrorhaphis. - Cryptogamie, Bryologie-Lichénologie 16(3): 177 - 190. 

POELT, J. & OBERMAYER, W. 1995: Rhizocarpon mosigiae spec. nov, ein neuer parasitischer Vertreter der Gattung aus Tirol (Österreich). - Herzogia 11: 111 - 113. 

HOFMANN, P., WITTMANN, H., OBERMAYER, W., HAFELLNER, J. & POELT, J. 1995: Lichenologische Ergebnisse der BLAM-Exkursion 1991 ins Oberinntal (Nordtirol, Österreich). - Herzogia 11: 225 - 237.

OBERMAYER, W. 1996: Lichenotheca Graecensis Fasc. 3 (Nos 41 - 60). - Fritschiana 6: 1 - 8.

*OBERMAYER, W. 1996: Remarks on the lichen genus Lethariella. (Lichenological results of the Sino-German-Joint-Expedition to southeastern- and eastern-Tibet 1994. III.). - In: The Third Symposium IAL 3, progress and problems in lichenology in the nineties, Salzburg, Austria, 1 - 7 September 1996, Abstracts: 8.

OBERMAYER, W. 1996: Pleopsidium discurrens (ZAHLBR.) OBERMAYER comb. nova, newly discovered in southern Tibet. (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. II.). - Annales Botanici Fennici 33: 231 - 236.

CZECZUGA, B., OBERMAYER, W., UPRETI, D. K. & SHARMA, L. R. 1996: Carotenoids in lichens in various regions of the Himalayas. - Journal of the Hattori Botanical Laboratory 80: 323 - 330. 

OBERMAYER, W. 1996: The genus Arthrorhaphis in the Himalayas, the Karakorum and the subalpine and alpine regions of south-eastern Tibet. (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. I.). - Journal of the Hattori Botanical Laboratory 80. 331 - 342.

OBERMAYER, W. 1997: Lichenotheca Graecensis Fasc. 4 (Nos 61 - 80). - Fritschiana 8: 1 - 6.

OBERMAYER, W. 1997: Lichenotheca Graecensis Fasc. 5 (Nos 81 - 100). -  Fritschiana 11: 1 - 6.

OBERMAYER, W. 1997: Flechten der Hochgebirge. - In: SCHÖLLER, H. [ed.]. Flechten: Geschichte, Biologie Systematik, Ökologie, Naturschutz und kulturelle Bedeutung. Begleitheft zur Ausstellung 'Flechten - Kunstwerke der Natur': 119 - 127. Frankfurt am Main.

OBERMAYER, W. 1997: Studies on Lethariella with special emphasis on the chemistry of the subgenus Chlorea. (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. IV.). - Bibliotheca Lichenologica 68: 45 - 66. go to ABSTRACT

TÜRK, R. & OBERMAYER, W. 1998: Die Verbreitung der Gattungen Anaptychia, Heterodermia, Hyperphyscia und Phaeophyscia (Physciaceae) in Österreich. - Folia Cryptogamica Estonica 32: 135 - 147.

HOFMANN, P. BERGER, F., OBERMAYER, W., WITTMANN, H., BREUSS, O. & SIPMAN, H. 1998: Ergänzungen zur Flechtenflora der Ötztaler Alpen (Tirol, Österreich). Ergebnisse der BLAM-Exkursion 1993. - Herzogia 13: 155 - 164.

OBERMAYER, W. 1998: Lichenotheca Graecensis, Fasc. 6 (Nos 101 - 120). - Fritschiana 16: 1 - 6.

OBERMAYER, W. 1998: Dupla Graecensia Lichenum (1998). - Fritschiana 16: 7 - 14.

HANSEN, E.S. & OBERMAYER, W. 1999: Notes on Arthrorhaphis and its lichenicolous fungi in Greenland. - Bryologist 102(1): 104 - 107. 

ELIX, J.A., WARDLAW, J.H., ARCHER, A.W. & OBERMAYER, W. 1999: 2-Methoxypsoromic acid, a new lichen depsidone. – Australian Journal of Chemistry 52(7): 717 - 719.

OBERMAYER, W. 1999: Lichenotheca Graecensis, Fasc. 7 & 8 (Nos 121 - 160). - Fritschiana 21: 1 - 11.

OBERMAYER, W. 1999: Dupla Graecensia Lichenum (1999). - Fritschiana 21: 13 - 30.

ELIX, J.A., WARDLAW, J.H. & OBERMAYER, W. 2000: 2-Hydroxyvirensic Acid, a New Depsidone from the Lichen Sulcaria sulcata. (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. V.). - Australian Journal of Chemistry 53: 233 - 235 go to ABSTRACT

OBERMAYER, W. 2001: Lichenotheca Graecensis, Fasc. 9 (Nos 161 - 180). – Fritschiana 25: 1 - 6.

OBERMAYER, W. 2001: Dupla Graecensia Lichenum (2001). – Fritschiana 25: 7 - 18.

HAFELLNER, J. & OBERMAYER, W. 2001: Ein Beitrag zur Flechtenflora der Murberge (Steiermark, Österreich). – Fritschiana 25: 19 - 32.

OBERMAYER, W. 2001: On the indentity of Lethariella siensis Wei & Jiang, with new reports of Tibetan Lethariella species. – Bibliotheca Lichenologica 78: 321 - 326.

OBERMAYER, W. 2001: Arthrorhaphidaceae. - In: McCarthy, P.M. [ed.], Flora of Australia 58A: 33 - 36.

McCUNE, B. & OBERMAYER, W. 2001: Typification of Hypogymnia hypotrypa and H. sinica. - Mycotaxon 79: 23 - 27.

OBERMAYER, W. 2001: Management of a Lichen Herbarium. - In: Kranner, I., Beckett, R. & Varma, A. [eds.], Protocols in Lichenolgoy (Springer Lab Manual). 507 - 523. Berlin, Heidelberg, New York.

RANDLANE, T., SAAG, A. & OBERMAYER, W. 2001: Cetrarioid lichens containing usnic acid from the Tibetan area. - Mycotaxon 80: 389 - 425.

OBERMAYER, W. 2002: Lichenotheca Graecensis, Fasc. 10 & 11 (Nos 181 - 220). – Fritschiana 33: 1 - 14.

OBERMAYER, W. 2002: Dupla Graecensia Lichenum (2002). – Fritschiana 33: 15 - 31.

SAAG, A., RANDLANE, T., THELL, A. & OBERMAYER, W. 2002. Phylogenetic analysis of cetrarioid lichens with globose ascospores. ­ – Proceedings of the Estonian Academy of Science, Biology, Ecology, 51(2): 103­123.

OBERMAYER, W. & ELIX, J.A. 2003: Notes on chemical races in Sulcaria sulcata from southeastern Tibet and adjacent regions. – Bibliotheca Lichenologica 86: 33 - 46.

ELIX, J.A., WARDLAW, J.H. & OBERMAYER, W. 2003: 2-Hydroxyconvirensic acid, a new depsidone from the lichen Sulcaria sulcata. – Australasian Lichenology 52: 6 - 8.

OBERMAYER, W. & KANTVILAS, G. 2003: The identity of the lichens Siphula himalayensis and Lecanora teretiuscula. – Herzogia: 27 - 34.   

HAFELLNER, J., OBERMAYER, W., BREUSS, O.& TÜRK, R. 2003: Flechtenfunde in den Schladminger Tauern in der Steiermark (BLAM-Exkursion 2001). – Herzogia 16: 187 - 206.   

OBERMAYER, W. 2003: Lichenotheca Graecensis, Fasc. 12 & 13 (Nos 221 - 260). – Fritschiana (Graz) 43: 1 - 12.  

OBERMAYER, W. 2003: Dupla Graecensia Lichenum (2003). – Fritschiana (Graz) 43: 13 - 45.

OBERMAYER, W. 2004: Additions to the lichen flora of the Tibetan region. –  Bibliotheca Lichenologica 88: 479 - 526.  

HAFELLNER, J., & OBERMAYER, W. 2004: Beobachtungen an einer sorediösen Population von Pseudevernia furfuracea. – Herzogia 17: 45 - 50.  

HAFELLNER, J., KOCOURKOVÁ, J. & OBERMAYER, W. 2004: Records of lichenicolous fungi from the northern Schladminger Tauern (Eastern Alps, Austria, Styria). – Herzogia 17: 59 - 66.  

OBERMAYER, W., BLAHA, J. & MAYRHOFER, H. 2004: Buellia centralis and chemotypes of Dimelaena oreina in Tibet and other Central-Asian regions. – Symbolae Botanicae Upsaliensis 327–342.  

OBERMAYER, W. 2004: Lichenotheca Graecensis, Fasc. 14 (Nos 261–280). – Fritschiana (Graz) 49: 1–7.  

OBERMAYER, W. 2004: Dupla Graecensia Lichenum (2004). – Fritschiana (Graz) 49: 9–27.  

HAFELLNER, J., OBERMAYER, S. & OBERMAYER, W. 2005: Zur Diversität der Flechten und lichenicolen Pilze im Hochschwab-Massiv (Nordalpen, Steiermark). – Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark 134: 57–103.  

*OBERMAYER, W. 2005:  Progress in the investigation of lichen diversity in the Tibetan area. – In: 2005 Beijing Mycological Symposium - Celebration of the 20th Anniversary of Key Laborator of Systematic Mycology and Lichenology, Chinese Academy of Sciences. Abstracts (July 5-8, 2005): 53–62. National Natural Science Foundation of China and Chinese Academy of Sciences.

OBERMAYER, W. & LISICKÁ, E. 2005: Bryoria Brodo et D. Hawksw. – In: LISICKÁ, E. The lichens of the Tatry Mountains: 55–60.

BJERKE, J.W. & OBERMAYER, W. 2005: The genus Menegazzia (Parmeliaceae, lichenized Ascomycetes) in the Tibetan region. – Nova Hedwigia 81: 301–310.

OBERMAYER, W. 2006: Lichenotheca Graecensis, Fasc. 15 (Nos 281–300). - Fritschiana (Graz) 52: 1–6.

OBERMAYER, W. 2006: Dupla Graecensia Lichenum (2006, nos 401–480). - Fritschiana (Graz) 52: 7–29.

TÜRK, R. & OBERMAYER, W. 2006: The distribution of the species of the genera Physcia and Physconia (Physciaceae) in Austria. - In: Lackovičová, A., Guttová, A., Lisická, E & Lizoň, P. [eds.]. Central European lichens - diversity and threat: 119–152. Mycotaxon Ltd., Ithaca.

HAFELLNER, J. & OBERMAYER, W. 2007: Flechten und lichenicole Pilze im Gebiet der Stubalpe (Österreich: Steiermark und Kärnten. – Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark 136: 5–59.

OBERMAYER, W.  & MAYRHOFER, H. 2007: Hunting for Cetrelia chicitae (lichenized ascomycetes) in the Eastern European Alps (including an attempt for a morphological characterization of all taxa of the genus Cetrelia in Central Europe). – Phyton (Horn) 47: 231– 290.

OBERMAYER, W. 2007: Lichenotheca Graecensis, Fasc. 16 (Nos 301–320). – Fritschiana (Graz) 60: 1–6.

OBERMAYER, W. 2007: Dupla Graecensia Lichenum (2007, nos 481–580). – Fritschiana (Graz) 60: 7–34.

OBERMAYER, W. 2008: Fotografische Dokumentation einer ungewöhnlich reich fruchtenden Aufsammlung von Cetraria islandica (L.) Ach. (mit einem historischen Abriss zur Darstellung fertiler Thalli, Anmerkungen zur Gestalt der Pycnosporen und einigen Notizen zum Gebrauch des ‚Kramperltees‘).  – Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark 138: 113 –158.

HAFELLNER, J. & OBERMAYER, W. 2009. The role of Paranectria oropensis in community dynamics of epiphyte synusia on roadside trees. – Herzogia 22: 177–190.

OBERMAYER W. 2009: Lichenotheca Graecensis, Fasc. 17 (Nos 321–340). - Fritschiana (Graz) 65: 1–6.

OBERMAYER W. 2009: Dupla Graecensia Lichenum (2009, nos 581–680). - Fritschiana (Graz) 65: 7–32.

OBERMAYER W., Kalb K., Sipman H. & Nash T. 2009: New reports of Culbersonia nubila (Moberg) Essl. from the Tibetan Region, Bolivia, Argentina, Lesotho and South Africa. - The Lichenologist 41(6): 683–687.   ---   © Cambridge University Press   ---

TEPPNER, H., HAUSL-HOFSTÄTTER, U., BROSCH, U. & OBERMAYER, W. 2009. Plötzliches, häufiges Auftreten von Colletes hederae / Efeu-Seidenbiene (Hymenoptera-Apoidea-Colletidae) im Stadtgebiet von Graz (Österreich). (Mit Notizen zur Anthese von Hedera helix). – Mitteilungen des Naturwissenschaftlichen Vereines für Steiermark 139: 183– 205 (mit 22 Abbildungen).

SOHRABI, M., OWE-LARSSON, B., NORDIN, A. & OBERMAYER, W. 2010: Aspicilia tibetica, a new terricolous species of the Himalayas and adjacent regions. - Mycological Progress 9: 491–499. (published online 13 Februrary 2010; ©  German Mycological Society and Springer 2010).

OBERMAYER, W. & KALB, K. 2010: Notes on three species of Pyxine (lichenized Ascomycetes) from Tibet and adjacent regions. - In: Hafellner, J., Kärnefelt, I. & Wirth, V. (eds.). Diversity and Ecolgy of Lichens in Polar and Mountain Ecosystems. Bibliotheca Lichenologica 104: 247–267. 

SPRIBILLE, T., GOFFINET, B., KLUG, B., MUGGIA, L., OBERMAYER, W. & MAYRHOFER, H. 2011: Molecular support for the recognition of the Mycoblastus fucatus group as the new genus Violella (Tephromelataceae, Lecanorales). - The Lichenologist 43(5): 445–466.

OBERMAYER, W. 2011: OBERMAYER, W. 2011: OBERMAYER, W. 2011: [bookreview of:] Thell, A. & Moberg R. (eds.) 2011: Nordic Lichen Flora Volume 4. Parmeliaceae. - Herzogia 24(2): 394–397.

OBERMAYER, W. 2011: Lichenotheca Graecensis, Fasc. 18–20 (Nos 341–400). - Fritschiana (Graz) 69: 1–16.

OBERMAYER, W. 2011: Dupla Graecensia Lichenum (2011, nos 681–800). - Fritschiana (Graz) 69: 17–53.

OBERMAYER, W. & RANDLANE, T. 2012: Morphological and chemical studies on Platismatia erosa (Parmeliaceae) from Tibet, Nepal and Bhutan. - The Bryologist 115(1): 51–60.

HAFELLNER, J., MUGGIA, L. & OBERMAYER, W. 2012: Rinodina candidogrisea, a new sorediate species from high altitudes in the Alps. - Bibliotheca Lichenologica 108: 75–102.

OBERMAYER, W. 2012: Lichenotheca Graecensis, Fasc. 21 (Nos 401–420). - Fritschiana (Graz) 74: 43–48. 

OBERMAYER, W. 2013: [bookreview of:] Wirth, V. & Kirschbaum, U. (eds.). 2013 (‚2014‘): Flechten einfach bestimmen. Ein zuverlässiger Führer zu den häufigsten Arten Mitteleuropas. – Wiebelsheim: Quelle & Meyer. 416 Seiten.

OBERMAYER Walter 2013: Dupla Graecensia Lichenum (2013, numbers 801–960). - Fritschiana (Graz) 76: 1–45.

HAFELLNER Josef, OBERMAYER Walter & TRETIACH Mauro 2014: Miriquidica invadens, an obligate youth parasite on Sporastatia, with remarks and a key to species of the M. griseoatra group. - The Lichenologist 46(3): 303–331.

MAYRHOFER Helmut, WETSCHNIG Wolfgang & OBERMAYER Walter 2014: Corticolous species of the genus Rinodina (lichenized Ascomycetes, Physciaceae) in southern Africa. - Herzogia 27(1): 1–12.

OBERMAYER Walter 2014: Lichenotheca Graecensis, Fasc. 22 (Nos 421–440). - Fritschiana (Graz) 78: 1–7.

OBERMAYER Walter 2015: Dupla Graecensia Lichenum (2015, numbers 961–1020). - Fritschiana (Graz) 80: 1–20.

Pierre Le POGAM, Anne-Cécile LE LAMER, Bandi SIVA, Béatrice LEGOUIN, Arnaud BONDON, Jerome GRATON, Denis JACQUEMIN, Isabelle ROUAUD, Solenn FERRON, Walter OBERMAYER, K. Suresh BABU, and Joël BOUSTIE 2016: Minor Pyranonaphthoquinones from the Apothecia of the Lichen Ophioparma ventosa. - Journal of Natural Products. 79: 1005–1011.

Einar TIMDAL, Walter OBERMAYER, and Mika BENDIKSBY 2016: Psora altotibetica (Psoraceae, Lecanorales), a new lichen species from the Tibetan part of the Himalayas. - MycoKeys. 13: 35–48.

Antonia FLEISCHHACKER, Martin GRUBE, Andreas FRISCH, Walter OBERMAYER, and Josef HAFELLNER 2016: Arthonia parietinaria - A common but frequently misunderstood lichenicolous fungus on species of the Xanthoria parietina-group. - Fungal Biology 120: 1341–1353.

**Lucia MUGGIA, Walter OBERMAYER, Helmut MAYRHOFER, Toby SPRIBILLE, Silke WERTH, Philipp RESL, and Martin GRUBE (editors) 2016: Festschrift celebrating the 65th birthday of Josef Hafellner. - Druck-Zuck GmbH, Druckerei und Verlag (Halle). [Herzogia 29(2/1): 213–623].

Martin GRUBE, Walter Obermayer, Helmut Mayrhofer, and Toby Spribille 2016: Josef Hafellner – a life amongst lichens and their parasites. - In: Lucia Muggia, Walter Obermayer, Helmut Mayrhofer, Toby Spribille, Silke Werth, Philipp Resl, Martin Grube (editors). Festschrift celebrating the 65th birthday of Josef Hafellner. - Herzogia 29(2/1): 213–234.

Pierre Le POGAM, Béatrice LEGOUIN, Audrey GEAIRON, Hélène ROGNIAUX, Françoise LOHÉZIC-LE DÉVÉHAT, Walter OBERMAYER, Joel BOUSTIE, and Anne-Cécile LE LAMER 2016: Spatial mapping of lichen specialized metabolites using LDI-MSI: chemical ecology issues for Ophioparma ventosa. - Scientific Reports 6. ('1-8'). doi:10.1038/srep37807

Walter OBERMAYER 2016: Dupla Graecensia Lichenum (2016, numbers 1021-1100). - Fritschiana (Graz) 83: 1-23.

**Silke WERTH & Walter OBERMAYER (editors) 2017: Lichen Genomics Workshop II. Institute of Plant Sciences, University of Graz, Austria. 2–5 November 2017 (Program and Abstracts). Graz, Austria. Institute of Plant Sciences, UNI-Graz. - Fritschiana (Graz) 85: 1–49.

Walter OBERMAYER 2017: Lichenotheca Graecensis, Fasc. 23 (Nos 441– 480). - Fritschiana (Graz) 87: 1–13.

Walter OBERMAYER 2017: Dupla Graecensia Lichenum (2017, numbers 1101–1190). - Fritschiana (Graz) 87: 15–40.

Walter OBERMAYER 2018: A contribution to the knowledge on the lichenological exploration of the greater Tibetan region with a special focus on the impact of Austrian scientists or explorers. – In: Blanz (editor). Biodiversity and Ecology of fungi lichens, and mosses. Kerner von Marilaun workshop 2015 in memory of Josef Poelt. Biosystematics and ecology series no. 34: 597–657.

**Toby SPRIBILLE, Walter OBERMAYER, and Pilipp RESL (editors) 2018: Festschrift celebrating the 65th birthday of Helmut Mayrhofer. - Druck-Zuck GmbH, Druckerei und Verlag (Halle). [Herzogia 31(1) Teil 2: 341–762].

Walter OBERMAYER, Magdalena WITZMANN, and Bruce McCUNE 2018: Hypogymnia caperatica, a new species from the Hengduan Shan area (easternmost Tibetan region), with notes on some rare taxa from the greater Tibetan region and Bhutan. - Herzogia 31(1) Teil 2: 677–694.

Kristiina MARK, Tiina RANDLANE, Göran THOR, Jae-Seoun HUR, Walter OBERMAYER, and Andres SAAG 2018: Lichen chemistry is concordant with multilocus gene genealogy in the genus Cetrelia (Parmeliaceae, Ascomycota). - Fungal Biology [https://doi.org/10.1016/j.funbio.2018.11.013]

Walter OBERMAYER 2019: Lichenotheca Graecensis, Fasc. 25 (Nos 481–500). - Fritschiana (Graz) 93: 1–7.

Walter OBERMAYER 2019: Data synopsis and indexes on the exsiccata 'Lichenotheca Graecensis' (numbers 1–500) issued between 1994 and 2019. - Fritschiana (Graz) 93: 9–30.

Ekaphan KRAICHAK, Luis ALLENDE, Walter OBERMAYER, Robert LÜCKING & H.Thorsten LUMBSCH 2019: Scale-dependent co-occurrence patterns of closely related genotypes in a lichen species complex. - Plant and Fungal Systematics 64(2): 163–172.

Evgeny A. DAVYDOV, Lidia S. YAKOVCHENKO, Irina URBANAVICHENE, Liudmila KONOREVA, Sergey CHESNOKOV, Tatiana KHARPUKHAEVA & Walter OBERMAYER 2020: Umbilicaria orientalis – a new species of Umbilicaria subg. Papillophora with an East Asian distribution: morphological delimitation and molecular evidence. - The Lichenologist 52: 353–364.

Walter OBERMAYER 2020: Dupla Graecensia Lichenum (2020, numbers 1191–1290). - Fritschiana (Graz) 96: 1–28.

*Peter BILOVIZ, Walter OBERMAYER, Helmut MAYRHOFER, Astrid SCHARFETTER & Josef HAFELLNER 2021: Flechten und mit ihnen assoziierte Pilze – ein bedeutender Sammlungsteil des Herbariums GZU. - In: 19. Botanik-Tagung, 2021. Abstract.

*Peter BILOVITZ, Walter OBERMAYER, Helmut MAYRHOFER, Astrid SCHARFETTER & Josef HAFELLNER 2021: The collection of lichens and lichenicolous fungi in the herbarium GZU - a hidden treasure. - In: International Association for Lichenology 9th Symposium (IAL 9). August 1 to 6, 2021, ONLINE, Brazil: 257.

Walter OBERMAYER & Anton DRESCHER 2021: Anmerkungen zum Auftreten von Kragenkiefern (Schindelkiefern, Schuppenschürzenkiefern) am Stadtrand von Graz. – Fritschiana (Graz) 97: 35–53.

**Walter OBERMAYER, Martina PÖLTL & Christian BERG 2022 (Editoren): 2. Symposium „Moose und Flechten“ der Bryologisch-lichenologischen Arbeitsgemeinschaft für Mitteleuropa (BLAM) e.V. (29. Juni – 3. Juli 2022). Programm und Abstracts. - Fritschiana (Graz) 98: 1–50.

Walter OBERMAYER 2022: Dupla Graecensia Lichenum (numbers 1291–1330). - Fritschiana (Graz) 100: 1–12.

Gabriele GHEZA, Luca Di NUZZO, Renato BENESPERI, Elisabetta BIANCHI, Paolo GIORDANI, Helmut MAYRHOFER, Pier Luigi NIMIS, Walter OBERMAYER, Chiara VALLESE, Juri NASCIMBENE 2022: The challenge of cryptic species for biodiversity conservation: the case study of the morphologically uniform genus Cetrelia in Italy. - 117° Congresso della Società Botanica Italiana, VIII International Plant Science Conference [poster].

Mohammad SOHRABI, Steven D. LEAVITT, Walter OBERMAYER & Helmut MAYRHOFER 2023: Circinaria nimisii (Megasporaceae, lichenized Ascomycota), a new manna lichen from Greece. - The Lichenologist 55: 367–376.

Walter OBERMAYER 2023: Dupla Graecensia Lichenum (numbers 1331–1390). - Fritschiana (Graz) 101: 1–18.

Kerry KNUDSEN, Jana KOCOURKOVÁ, Eva HODKOVÁ, Jason DART, Christian DOLNIK, Jiří MALÍČEK & Walter OBERMAYER 2023. Exploring the Sarcogyne phylogeny: three new species and four new reports from Europe and North America (Austria, Czech Republic, Greece, Germany, Romania, U.S.A.). – Herzogia 36: 445–469.