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Issue: Vol. 767 No. 2: 21 Jul. 2026
Type: Article
Published: 2026-07-21
DOI: 10.11646/phytotaxa.767.2.8
Page range: 197-203
Abstract views: 38
PDF downloaded: 1

Resolving Taxonomic Ambiguity in the Graphidaceae: Phaeographina torquescens and Sarcographina subtorquescens are Synonyms of Sarcographa glyphiza

Department of Botany, University Centre for Research and Development (UCRD), Chandigarh University, Gharuan, Mohali–140413, Punjab, India
Lichens Asia China Glyphis India Lichen-forming fungi Malaysia Phaeographina Sarcographina Sarcographa Sri Lanka Synonym

Abstract

The taxonomic identity of the type material of Phaeographina torquescens (basionym: Glyphis torquescens) and Sarcographina subtorquescens (basionym: Glyphis subtorquescens) housed at the Finnish Museum of Natural History, Helsinki (H-NYL) is critically re-evaluated and found to be conspecific with Sarcographa glyphiza. Henceforth, both taxa are synonymized under S. glyphiza. This taxonomic revision is based on a thorough examination of all available type specimens, including detailed morphological, anatomical, and chemical analyses, as well as distributional data. The findings help resolve long-standing nomenclatural ambiguities within the Graphidaceae and contribute to a more precise understanding of species delimitation and synonymy in the group.

References

  1. Fée, A.L.A. (1825) Essai sur les cryptogames des écorces exotiques officinales. Levrault, Strasbourg, 58 pp.
  2. Species Fungorum. (2025) Species Fungorum. The Royal Botanic Gardens, Kew. Available from: https://www.speciesfungorum.org/ (accessed 23 April 2026)
  3. Islary, P., Daimari, R., Biswas, S., Nayaka, S., Joseph, S. & Dwimary, S. (2022) An enumeration of lichen diversity from Ultapani Forest Range of Kokrajhar District, Assam with Ocellularia calvescens and Rhabdodiscus subcavatus, two new records in India. Journal of Fungi 7 (5): 1–5. https://doi.org/10.48130/SIF-2022-0005
  4. Lücking, R., Kalb, K., Staiger, B. & McNeill, J. (2007) Proposal to conserve the name Phaeographis, with a conserved type, against Creographa, Ectographis, Flegographa, Hymenodecton, Platygramma, and Pyrographa (Ascomycota: Ostropales: Graphidaceae), along with notes on the names Graphina and Phaeographina. Taxon 56 (4): 1296–1299. https://doi.org/10.2307/25065924
  5. Lücking, R. & Plata Rivas, E. (2008) Clave y guía ilustrada para géneros de Graphidaceae. Glalia 1: 1–41.
  6. McNeill, J., Barrie, F.R., Buck, W.R., Demoulin, V., Greuter, W., Hawksworth, D., Herendeen, P., Knapp, S., Marhold, K., Prado, J., Prud’homme van Reine, W., Smith, G.F., Wiersema, J. & Turland, N. (2012) International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) adopted by the Eighteenth International Botanical Congress, Melbourne, Australia, July 2011. Regnum Vegetabile 154. Koeltz Scientific Books, 270 pp.
  7. Müller Argoviensis, J. (1891) Lichenologische Beiträge, Organ für Kryptogamenkunde nebst Repertorium für kryptogamische Literatur. Hedwigia 30: 181–196.
  8. Nylander, W. (1863) Lichenes Japoniae. Annales des Sciences Naturelles, Botanique 4, 19: 374.
  9. Nylander, W. (1890) Lichenes Japoniæ : accedunt observationibus lichenes insulæ Labuan. Paris, 114 pp.
  10. Nylander, W. (1900) Lichenes Ceylonenses et Additamentum ad Lichenes Japoniae (Opus posthumum). Acta Societatis Scientiarum Fennicae 26 (10): 1–79.
  11. Orange, A., James, P.W. & White, F.J. (2001) Microchemical Methods for the Identification of Lichens. British Lichen Society, London.
  12. Redinger, K. (1936) Studien über die Flechtenfamilie Graphidaceae. Revue Bryologique et Lichénologique 9 (1–2): 91, 94, tab. V, fig. 66.
  13. Singh, P., Singh, K.P. & Bhatt, A.B. (2015a) Diversity and distribution of microlichens in the state of Arunachal Pradesh, Eastern Himalaya, India. Checklist 11 (6): 1–20. https://doi.org/10.15560/11.6.1807
  14. Singh, P. & Singh, K.P. (2015b) Additional lichen records of Graphidaceae for Manipur, Meghalaya, and Nagaland, North‑East India. Geophytology 45 (2): 181–194.
  15. Singh, P. & Singh, K.P. (2015c) Two new species of Graphis (Ascomycota: Ostropales: Graphidaceae), from the Indo-Burma biodiversity hotspot. Mycosphere 5 (4): 504–509. https://doi.org/10.5943/mycosphere/5/4/2
  16. Singh, P. & Singh, K.P. (2016) Three new records of lichens in the family graphidoid Graphidaceae for India. Indian Journal of Forestry 39 (2): 147–149. https://doi.org/10.54207/bsmps1000-2016-2682FE
  17. Singh, P., Jagadeesh R. & Singh, K.P. (2017a) A new species of Leiorreuma (Ascomycota, Ostropales) from Great Nicobar Island, India. Bangladesh Journal of Plant Taxonomy 24 (1): 9–12. https://doi.org/10.3329/bjpt.v24i1.33000
  18. Singh, P. & Singh, K.P. (2017b) New combinations in the family Graphidaceae (lichenized Ascomycota: Ostropales) from India. The Lichenologist 49 (5): 527–533. https://doi.org/10.1017/S0024282917000330
  19. Singh, P. & Singh, K.P. (2020) New combinations and synonyms in Graphidaceae (lichenized Ascomycota) from India. The Lichenologist 52 (2): 251–256. https://doi.org/10.1017/S0024282920000043
  20. Singh, K.P. & Sinha, G.P. (2010) Indian Lichens: An Annotated Checklist. Botanical Survey of India, Ministry of Environment and Forests, Salt Lake City, Kolkata, India, 571 pp.
  21. Sinha, G., Nayaka, S. & Mishra, G.K. (2024) A comprehensive checklist of lichens from India. Cryptogam Biodiversity and Assessment 8 (2): 1–134.
  22. Pictures of Tropical Lichens. (2025) Sarcographina glyphiza—Pictures of Tropical Lichens. Tropical Lichens. Available from: https://www.tropicallichens.net/4068.html/ (accessed 8 July 2025)
  23. Wijayawardene, N.N. (2020) Outline of Fungi and Fungus-like Taxa. Mycosphere 11 (1): 1060–1456. https://doi.org/10.5943/mycosphere/11/1/8
  24. Zahlbruckner, A. (1923) Catalogus Lichenum Universalis, Vol. 2. Springer, Wien, 470 pp.

How to Cite

Singh, P. (2026) Resolving Taxonomic Ambiguity in the Graphidaceae: Phaeographina torquescens and Sarcographina subtorquescens are Synonyms of Sarcographa glyphiza. Phytotaxa 767 (2): 197–203. https://doi.org/10.11646/phytotaxa.767.2.8