Red Buckeye – Aesculus pavia

by | Dec 19, 2023 | Red Buckeye

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Punctelia subflava is a species of foliose lichen in the family Parmeliaceae that occurs in Australia.

Taxonomy

The lichen was first formally described in 1847 as Parmelia subflava by botanist Thomas Taylor. The type specimen, described from the herbarium collection of William Borrer, was collected on Tasmania (called Van Diemen's Land in the original publication). Taylor compared it to the common species Parmelia sulcata, noting that it was smaller, and had neither a reticulated surface nor the retuse lobes (having an obtuse or rounded apex with a shallow notch) characteristic of that widespread species.[2] John Elix and Jen Johnston transferred Parmelia subflava to the genus Punctelia in 1988.[3] Several years earlier, David Galloway and Elix had proposed Parmelia subflava to be synonymous with Punctelia rudecta.[4] It is now known that Punctelia rudecta is a Northern Hemisphere species and does not occur in Australasia.[5]

Description

Identical in secondary chemicals, and similar in appearance to Punctelia rudecta, Punctelia subflava can be distinguished from that species by the form of the pseudocyphellae (sparse and point-like), the thickness of the thallus (thin and fragile), and the morphology of the isidia (always dorsiventral).[3] The lecanoric acid derivative 5-chlorolecanoric acid occurs in this species.[6]

Punctelia subflava is listed as "Extinct" on the schedules of the Tasmanian Threatened Species Protection Act 1995.[7]

References

  1. ^ "Synonymy: Punctelia subflava (Taylor) Elix & J. Johnst., Mycotaxon 31(2): 501 (1988)". Species Fungorum. Retrieved 26 August 2021.
  2. ^ Taylor, T. (1847). "New lichens, principally from the Herbarium of Sir William J. Hooker". London Journal of Botany. 6: 148–197 (see p. 174).
  3. ^ a b Elix, John A.; Johnston, Jen (1988). "New species in the lichen family Parmeliaceae (Ascomycotina) from the southern hemisphere". Mycotaxon. 31 (2): 491–510.
  4. ^ Galloway, D.J.; Elix, J.A. "Additional notes on Parmelia and Punctelia (lichenised Ascomycotina) in Australasia". New Zealand Journal of Botany. 21 (4): 397–420. doi:10.1080/0028825X.1983.10428572.
  5. ^ Alors, David; Lumbsch, H. Thorsten; Divakar, Pradeep K.; Leavitt, Steven D.; Crespo, Ana (2016). "An integrative approach for understanding diversity in the Punctelia rudecta species complex (Parmeliaceae, Ascomycota)". PLOS ONE. 11 (2): e0146537. Bibcode:2016PLoSO..1146537A. doi:10.1371/journal.pone.0146537. PMC 4749632. PMID 26863231.
  6. ^ Elix, John A.; Wardlaw, Judith H. (2002). "5-Chlorolecanoric acid, a new depside from Punctelia species" (PDF). Australasian Lichenology. 50: 6–9.
  7. ^ Kantvilas, Gintaras (2006). Tomida, Y. (ed.). Proceedings of the 7th and 8th Symposia on Collection Building and Natural History Studies in Asia and the Pacific Rim. National Science Museum Monographs. Vol. 34. pp. 149–162.
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