A new species of the lichen genus Zwackhia (Lecanographaceae) from coastal granite in Tasmania

Patrick McCarthy

doi:10.7751/telopea22261

Authors

Patrick McCarthy Canberra

DOI:

https://doi.org/10.7751/telopea22261

Keywords:

Zwackhia, Lichens, Tasmania, Granite, New species, Australia, Lecanographaceae

Abstract

Zwackhia contorta P.M.McCarthy sp. nov. (lichenised Ascomycota, Lecanographaceae) is described from coastal granite in the Furneaux Group of islands, Bass Strait, Tasmania. The second saxicolous member of the genus, it has a thin, pale epilithic thallus, comparatively short, prominent and often contorted, lirelliform ascomata with a closed proper excipulum, a non-inspersed hymenium, broad asci with one or two fascicles of elongate, often halonate, 9–13-septate ascospores measuring 23–33 × 3.5–5 µm. Minute pycnidia produce conidia of 4–10 × c. 0.5 µm.

References

Cannon P, Coppins B, Ertz D, Pentecost A, Sanderson N, Simkin J, Wolseley P (2021) Arthoniales: Lecanographaceae, including the genera Alyxoria, Lecanographa, Phacographa, Plectocarpon and Zwackhia. Revisions of British and Irish Lichens 14: 1–15. https://britishlichensociety.org.uk/sites/default/files/Lecanographaceae.pdf

Diederich P, Ertz D, Eichler M, Cezanne R, van den Boom P, Fischer E, Killmann D, van den Broeck D, Sérusiaux E (2012) New or interesting lichens and lichenicolous fungi from Belgium, Luxembourg and northern France. XIV. Bulletin de la Société des Naturalistes Luxembourgeois 113: 95–115. http://www.lichenology.info/pdf/L14.pdf

Ertz D (2009) Revision of the corticolous Opegrapha species from the Paleotropics. Bibliotheca Lichenologica 102: 1–176.

Ertz D, Tehler A (2011) The phylogeny of Arthoniales (Pezizomycotina) inferred from nucLSU and RPB2 sequences. Fungal Diversity 49: 47–71. https://doi.org/10.1007/s13225-010-0080-y

Ertz D, Miadlikowska J, Lutzoni F, Dessein S, Raspé O, Vigneron N, Hofstetter V, Diederich P (2009) Towards a new classification of the Arthoniales (Ascomycota) based on a three-gene phylogeny focussing on the genus Opegrapha. Mycological Research 113: 141–152. https://doi.org/10.1016/j.mycres.2008.09.002

Frisch A, Thor G, Ertz D, Grube M (2014) The Arthonialean challenge: restructuring Arthoniaceae. Taxon 63: 727–744. https://doi.org/10.12705/634.20

McCarthy PM (2023) Checklist of the lichens of Australia and its island territories. (Australian Biological Resources Study, Canberra) https://www.anbg.gov.au/abrs/lichenlist/introduction.html (accessed 15 February 2026)

Nimis PL (2021) Key to the lichens of Italy – 42. Opegrapha (with Alyxoria, Bactrospora, Cresponea, Enterographa, Gyrographa, Lecanactis, Lecanographa, Paralecanographa, Pseudoschismatomma, Psoronactis, Zwackhia, and opegraphoid species of Arthonia). Project Dryades, (Department of Life Sciences, University of Trieste) https://italic.units.it/flora/index.php?procedure=ext_key_home&key_id=2869

Paz-Bermúdez G, Carballal R, López de Silanes ME (1998) Two new records of interesting species to the European flora. Lichenologist 30: 591–593. https://doi.org/10.1017/S0024282992000604

Pentecost A, James PW (2009) Opegrapha Ach. (1809). Pp. 631–647 in Smith CW, Aptroot A, Coppins BJ, Fletcher A, Gilbert OL, James PW, Wolseley PA (eds), The lichens of Great Britain and Ireland. (British Lichen Society; London) https://britishlichensociety.org.uk/sites/default/files/Opegraphaceae.pdf

Torrente P, Egea JM (1989) La familia Opegraphaceae en el area Mediterránea de la Peninsula Ibérica y Norte de Africa. Bibliotheca Lichenologica 32: 1–282.

van den Boom PPG, Clerc P, Ertz D (2015) New records of lichens and lichenicolous fungi from La Gomera (Canary Islands, Spain), including the new species: Usnea boomiana P. Clerc. Candollea 70: 165–177. https://doi.org/10.15553/c2015v702a1

Wieczorek A (2018) The lichen genus Opegrapha s. l. in Poland: morphological variability, ecology, and distribution. Monographiae Botanicae 107: 1–162. https://doi.org/10.5586/mb.2018.001