| Lecanora perpruinosa | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Lecanorales |
| Family: | Lecanoraceae |
| Genus: | Lecanora |
| Species: | L. perpruinosa |
| Binomial name | |
| Lecanora perpruinosa Fröberg (1989) | |
Lecanora perpruinosa is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecanoraceae. It occurs in Northern Europe, Estonia, Turkey, Russia, and Canada, where it grows on calcareous rocks.
The species was first scientifically described by Lars Fröberg in his 1989 PhD dissertation. The type specimen was collected from a pavement in Sweden. [1] However, the species is not considered to be validly published according to nomenclatural rules: although all of the requirements for valid publication were met by the author, he explicitly stated in his work that the new species was "not formally described here". [2] In 2015, Śliwa, Zhao Xin, and Lumbsch proposed to transfer the taxon to the genus Myriolecis . [3] This new combination is also not valid because the basionym upon which it is based is invalid. [4] Despite the nomenclatural invalidity of the taxon, it continues to be referenced in lichenological literature.
In a molecular phylogenetics analysis, Lecanora perpruinosa was shown to occupy a sister group relationship with a clade of species referred to as the Lecanora dispersa group. [5]
The thallus of Lecanora perpruinosa is superficial, presenting an ash-grey colour. It is thin and displays either a cracked ( rimose ) or tiled ( areolate ) pattern, with an indistinct but mostly continuous edge. The apothecia (fruiting bodies) measure 0.3–0.8 mm in diameter. These structures are sessile , meaning they sit directly on the substrate without a stalk. The disc of the apothecia can appear black or near-black, or dark red to brown, and is heavily dusted with a bluish-white powdery coating called pruina . The edges of the apothecia are pronounced or level with the disc and share the same pruinose, colour-matching appearance as the thallus. [6]
The cortex surrounding the apothecia is distinctly paraplechtenchymatous , indicating it is made up of densely interwoven hyphae, providing structural integrity. Unlike some other species in the genus, there are no granules in the epithecium (the uppermost layer of cells in the apothecia). The paraphyses (filamentous structures among the spores) are simple, thick, and bead-like (submoniliform). The ascospores of Lecanora perpruinosa are medium-sized, measuring between 10.5 and 12.0 μm in length and 5.0–7.5 μm in width. This lichen does not produce any secondary metabolites typically found in other lichens. [6]
In addition to Sweden, the country of its original determination, [1] its distribution in Northern Europe also includes Finland, [6] Norway, [7] and Denmark. [8] It also occurs in Estonia, [9] and Turkey. [10] In Russia, it has been recorded from the Ryazan Oblast, the Komi Republic, and the Tver Oblast. [6] [9] In 2000, the lichen was reported growing on limestone cliffs within the Niagara Escarpment Biosphere Reserve in southern Ontario, Canada, marking its first record from North America. [11]
Melanohalea is a genus of foliose lichens in the family Parmeliaceae. It contains 30 mostly Northern Hemisphere species that grow on bark or on wood. The genus is characterised by the presence of pseudocyphellae, usually on warts or on the tips of isidia, a non-pored epicortex and a medulla containing depsidones or lacking secondary metabolites. Melanohalea was circumscribed in 2004 as a segregate of the morphologically similar genus Melanelia, which was created in 1978 for certain brown Parmelia species. The methods used to estimate the evolutionary history of Melanohalea suggest that its diversification primarily occurred during the Miocene and Pliocene epochs.
Melanelixia is a genus of foliose lichens in the family Parmeliaceae. It contains 15 Northern Hemisphere species that grow on bark or on wood. The genus is characterized by a pored or fenestrate epicortex, and the production of lecanoric acid as the primary chemical constituent of the medulla. Melanelixia was circumscribed in 2004 as a segregate of the related genus Melanelia.
Rhizoplaca is a genus of lichenized fungi in the family Lecanoraceae. Members of the genus are commonly called rimmed navel lichens because of their umbilicate growth form and lecanorine apothecia, also rock-posy lichen and rockbright.
Lecanora xanthoplumosella is a species of crustose lichen in the family Lecanoraceae. Known from Australia, it was described as new to science in 2011.
Lecanora mugambii is a species of crustose lichen in the family Lecanoraceae. Found in western Kenya, it was described as new to science in 2011.
Lecanora printzenii is a species of crustose lichen in the family Lecanoraceae. Originally found in Spain, it was described as new to science in 2011. It shares several characteristics with lichens of the Lecanora varia group but is differentiated by its unique sequence in the internal transcribed spacer (ITS) region of its DNA and by several distinctive physical characteristics.
Lepraria sekikaica is a species of leprose (powdery) lichen in the family Lecanoraceae. Found in Western Australia, it was formally described as a new species by lichenologist John Elix. It was one of 100 new lichen species published in a single article, helping to highlight the extent of undiscovered global biodiversity. The type specimen was collected by the author in the Boyagin Rock Nature Reserve. It is known from several locations in Western Australia, where it grows on the ground under sheltered rock ledges. The lichen products made by Lepraria sekikaica include atranorin, homosekikaic acid, 4'-O-demethylsekikaic acid, and fragilin as minor products, and sekikaic acid as a major metabolite. The specific epithet refers to the latter compound; Lepraria sekikaica is the first known in genus Lepraria to contain this substance.
Protoparmeliopsis garovaglii is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecanoraceae. The species was originally described as Placodium garovaglii by German lichenologist Gustav Wilhelm Körber in 1859. It was later classified in Lecanora in 1900, and known as a member of that genus for more than a century. Molecular phylogenetics showed that Lecanora was highly polyphyletic, and as a result, the genus was divided into several smaller, more phylogenetically natural genera. Subsequently, in 2015, Lecanora garovaglii was transferred to genus Protoparmeliopsis.
Rhizoplaca occulta is a species of crustose lichen in the family Lecanoraceae.
Palicella is a genus of crustose lichens in the family Lecanoraceae. It contains six species.
Myriolecis is a genus of lichen in the family Lecanoraceae. It was originally circumscribed in 1909 by Frederic E. Clements with Myriolecis sambuci as the type species. The genus was later reinstated to accommodate the Lecanora disperse group and Arctopeltis. Molecular phylogenetic data showed that this group of species formed a clade that is genetically distinct from Lecanora, and Myriolecis was the oldest name available to hold these species.
Lecanora polytropa, the granite-speck rim lichen, is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecanoraceae. A small, inconspicuous species that grows in the cracks of rock surfaces, it has a cosmopolitan distribution and has been recorded on all continents, including Antarctica.
Neoprotoparmelia is a genus of crustose lichens that was created in 2018. It contains 24 tropical and subtropical species that mostly grow on bark. Neoprotoparmelia is in the subfamily Protoparmelioideae of the family Parmeliaceae, along with the morphologically similar genera Protoparmelia and Maronina.
Lecanora solaris is a species of crustose lichen in the family Lecanoraceae. Found in the Altai Mountains in Russia, the lichen was described as new to science in 2019 by Lydia Yakovchenko and Evgeny Davydov. The lichen is similar in general morphology to Lecanora somervellii, but can be distinguished from that species by its small, squamulose (scaly) to marginally lobate umbilicate thallus and the persistent margin of its apothecia. The species epithet makes reference to the bright yellow colour of the lichen.
Lecanora kohu is a species of lichen in the family Lecanoraceae. Found in the Chatham Islands of New Zealand, it was formally described as new to science in 2017.
The Rhizocarpales are an order of lichen-forming fungi in the subclass Lecanoromycetidae of the class Lecanoromycetes. It has two families, Rhizocarpaceae and Sporastatiaceae, which contain mostly crustose lichens.
Lecanora helmutii is a rare species of corticolous (bark-dwelling), crustose lichen in the family Lecanoraceae. Found in Tasmania, it was formally described as a new species in 2018 by Sergio Pérez-Ortega and Gintaras Kantvilas. The type specimen was collected from the eastern side of Stanley Highway, where it was found growing on the bark of Banksia marginata in a coastal swampy woodland dominated by Melaleuca. It is only known from the type collection. Other associated lichens include Austroparmelina pseudorelicina, Bactropsora paludicola, Menegazzia subpertusa, Pannaria elixii, and Parmotrema perlatum. The species epithet honours Austrian lichenologist Helmut Mayrhofer.
Rhizoplaca novomexicana is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecanoraceae. Found in North America, the lichen was first formally described as a new species in 1932 by Adolf Hugo Magnusson, as a member of the genus Lecanora. Sergey Kondratyuk proposed a transfer to the genus Protoparmeliopsis in 2012. Steven Leavitt, Xin Zhao, and H. Thorsten Lumbsch transferred it to the genus Rhizoplaca in 2015, when, following molecular phylogenetics analysis, they emended that genus to include three placodioid species previously placed in Lecanora.
Glaucomaria is a genus of lichen-forming fungi in the family Lecanoraceae. It has seven species. The genus was circumscribed by Maurice Choisy in 1929. It contains crustose lichens formerly placed in the Lecanora rupicola species complex as defined by several previous authors.