''Pallidogramme'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

lichen A lichen ( , ) is a hybrid colony (biology), colony of algae or cyanobacteria living symbiotically among hypha, filaments of multiple fungus species, along with yeasts and bacteria embedded in the cortex or "skin", in a mutualism (biology), m ...

-forming

fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...

in the family

Graphidaceae The Graphidaceae are a family of lichen-forming fungi in the order Graphidales. The family contains nearly a hundred genera and more than 2000 species. Although the family has a cosmopolitan distribution, most Graphidaceae species occur in tropic ...

. It has 8 species of

corticolous This glossary of mycology is a list of definitions of terms and concepts relevant to mycology, the study of fungi. Terms in common with other fields, if repeated here, generally focus on their mycology-specific meaning. Related terms can be found ...

(bark-dwelling),

crustose lichen Crustose lichens are lichens that form a crust which strongly adheres to the Substrate (biology), substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without destruction. The basic structure of crustose lichen ...

Taxonomy

''Pallidogramme'' was proposed in 2008 by the lichenologists

Bettina Staiger Bettina Staiger (born 1968) is a German lichenologist known for her systematic studies of tropical lichen families, particularly the Graphidaceae. Born in Stuttgart, she completed her doctoral research at the University of Regensburg under Kl ...

Klaus Kalb Klaus Kalb (born 1942) is a German lichenologist and an authority on tropical lichens. Born in Nuremberg, he studied at the University of Erlangen–Nuremberg before pursuing a career that significantly advanced the field of lichenology, parti ...

, and

Robert Lücking Robert Lücking (born 1964) is a German lichenologist, known for his extensive research on foliicolous lichens (lichens that live on leaves) and his significant contributions to the taxonomy, ecology, and biodiversity of fungi and lichens. He e ...

, as a

replacement name In biological nomenclature, a ''nomen novum'' (Latin for "new name"), replacement name (or new replacement name, new substitute name, substitute name) is a replacement scientific name that is created when technical, nomenclatural reasons have mad ...

for ''Leucogramma'' . The justification for this change originated from the previously established ''Hemithecium'' subgen. ''Leucogramma'' by Staiger in 2002. There was, however, a pre-existing generic name, ''Leucogramma'' , which was based on the same species as Staiger's subgenus, ''Hemithecium chrysenteron''. Both of these names were unusable at the genus level due to their

homonymy In linguistics, homonyms are words which are either; ''homographs''—words that mean different things, but have the same spelling (regardless of pronunciation), or ''homophones''—words that mean different things, but have the same pronunciatio ...

with ''Leucogramma'' a name with unknown

taxonomic 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme of classes (a taxonomy) and the allocation ...

affinity. As a result, a new name was deemed necessary to avoid confusion and maintain nomenclatural clarity.

Description

The defining features of genus ''Pallidogramme'' include a crust-like, bark-dwelling

thallus Thallus (: 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. A thallus usually names the entir ...

, fully formed labia, a predominantly

hymenium The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in oth ...

, and an which is non-, displaying a spectrum of colours from pale yellowish-brown to reddish-brown, accompanied by internal striations. Moreover, it possesses that range in colour from pale brown to brown, and that turn reddish-brown when stained with

iodine Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at , and boils to a vi ...

(I+).

Species

* '' Pallidogramme awasthii'' * '' Pallidogramme canarensis'' * '' Pallidogramme chapadana'' * '' Pallidogramme chlorocarpoides'' * ''

Pallidogramme chrysenteron ''Pallidogramme'' is a genus of lichen-forming fungi in the family Graphidaceae. It has 8 species of corticolous lichen, corticolous (bark-dwelling), crustose lichens. Taxonomy ''Pallidogramme'' was proposed in 2008 by the lichenologists Betti ...

'' * '' Pallidogramme chrysentherodes'' * '' Pallidogramme divaricoides'' * '' Pallidogramme parvicarpa'' ''Pallidogramme indica'' was proposed as a new species from India in 2009, but it was not published validly; a similar situation occurs with the proposed ''Pallidogramme undulatolirellata'' , and ''Pallidogramme bengalensis'' . Former ''Pallidogramme'' species: *''Pallidogramme commutabilis'' is now '' Platygramme commutabilis'' *''Pallidogramme montiscalvi'' is now '' Phaeographina montiscalvi'' *''Pallidogramme nilgiriensis'' is now '' Graphis nilgiriensis''.

References

{{Taxonbar, from=Q10615430 Graphidaceae Taxa described in 2008 Lichen genera Graphidales genera Taxa named by Klaus Kalb Taxa named by Robert Lücking