''Punctelia subflava'' is a species of

foliose lichen Foliose lichen is one of the morphological classes of lichens, which are complex organisms that arise from the symbiotic relationship between fungi and a photosynthetic partner, typically algae. This partnership allows lichen to live in diverse ...

in the family

Parmeliaceae The Parmeliaceae is a large and diverse family of Lecanoromycetes. With over 2700 species in 71 genera, it is the largest family of lichen-forming fungi. The most speciose genera in the family are the well-known groups: '' Xanthoparmelia'' ( 822 ...

that occurs in Australia.

Taxonomy

The lichen was first formally described in 1847 as ''Parmelia subflava'' by botanist

Thomas Taylor Thomas Taylor may refer to: Military *Thomas H. Taylor (1825–1901), Confederate States Army colonel *Thomas Happer Taylor (1934–2017), U.S. Army officer; military historian and author; triathlete *Thomas Taylor (Medal of Honor) (born 1834), Am ...

. The

type specimen In biology, a type is a particular wiktionary:en:specimen, specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to a ...

, described from the

herbarium A herbarium (plural: herbaria) is a collection of preserved plant specimens and associated data used for scientific study. The specimens may be whole plants or plant parts; these will usually be in dried form mounted on a sheet of paper (called ...

collection of

William Borrer William Borrer ( Henfield, Sussex, 13 June 1781 – 10 January 1862) was an English botanist noted for his extensive and accurate knowledge of the plants of the British Islands. He travelled extensively around Britain to see and collect plan ...

, was collected on

Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...

(called

Van Diemen's Land Van Diemen's Land was the colonial name of the island of Tasmania used by the British during the European exploration of Australia in the 19th century. A British settlement was established in Van Diemen's Land in 1803 before it became a sepa ...

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. John Elix and Jen Johnston transferred ''Parmelia subflava'' to the genus ''

Punctelia ''Punctelia'' is a genus of foliose lichens belonging to the large family Parmeliaceae. The genus, which contains about 50 species, was segregated from genus ''Parmelia'' in 1982. Characteristics that define ''Punctelia'' include the presence of ...

'' in 1988. Several years earlier, David Galloway and Elix had proposed ''Parmelia subflava'' to be

synonymous A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

with '' Punctelia rudecta''. It is now known that ''Punctelia rudecta'' is a Northern Hemisphere species and does not occur in Australasia.

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

pseudocyphella Pseudocyphellae (singular ''pseudocyphella'') are structures in lichens that appear as tiny pores on the outer surface (the cortex of the lichen. They are caused when there is a break in the cortex of the lichen, and the medullary hyphae extend t ...

e (sparse and point-like), the thickness of the

thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ...

(thin and fragile), and the

morphology Morphology, from the Greek and meaning "study of shape", may refer to: Disciplines *Morphology (archaeology), study of the shapes or forms of artifacts *Morphology (astronomy), study of the shape of astronomical objects such as nebulae, galaxies, ...

of the

isidia An isidium is a vegetative reproductive structure present in some lichens. Isidia are outgrowths of the thallus surface, and are corticated (i.e., containing the outermost layer of the thallus), usually with a columnar structure, and consisting o ...

(always dorsiventral). The

lecanoric acid Lecanoric acid is a chemical produced by several species of lichen.ubChem - Lecanoric acid"> Lecanoric acid is classified as a polyphenol and a didepside and it functions as an antioxidant. The acid is named after the lichen ''Lecanora''. The acid ...

derivative 5-chlorolecanoric acid occurs in this species. ''Punctelia subflava'' is listed as extinct on the schedules of the Tasmanian

Threatened Species Protection Act 1995 The ''Threatened Species Protection Act 1995'' (TSP Act), is an act of the Parliament of Tasmania that provides the statute relating to conservation of flora and fauna. Its long title is An Act to provide for the protection and management of th ...

References

{{Taxonbar, from=Q10646764 subflava Lichen species Lichens described in 1847 Lichens of Australia Taxa named by Thomas Taylor (botanist)