''Endoptychum'' 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 ...

secotioid Secotioid fungi produce an intermediate fruiting body form that is between the mushroom-like hymenomycetes and the closed bag-shaped gasteroid fungi, gasteromycetes, where an evolutionary process of gasteromycetation has started but not run to co ...

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

Agaricaceae The Agaricaceae are a family of basidiomycete fungi and include the genus ''Agaricus'', as well as basidiomycetes previously classified in the families Tulostomataceae, Lepiotaceae, and Lycoperdaceae. Taxonomy The family Agaricaceae was publishe ...

. Like the majority of secotioid taxa, the individual species of ''Endoptychum'' are thought to be recent mutations from agaricoid species, hence, ''Endoptychum'' is likely not a valid

monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...

genus. So far,

molecular phylogeny Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

and morphological study has revealed that '' E. depressum'' is a species of ''

Agaricus ''Agaricus'' is a genus of mushroom-forming fungi containing both edible and poisonous species, with over 400 members worldwide and possibly again as many disputed or newly discovered species. The genus includes the common ("button") mushroom ...

'' and '' E. agaricoides'', the

type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...

, is a species of '' Chlorophyllum''. ''E. depressum'' has been renamed ''Agaricus inapertus'' Vellinga.columellata within Agaricus, A., Phylogenetic placement of the secotioid fungus. Recognition of the name ''Chlorophyllum agaricoides'' (Czern.) Vellinga would entail deprecation of the entire genus name ''Endoptychum'' in favor of ''Chlorophyllum'' and awaits a formal decision of the

International Botanical Congress International Botanical Congress (IBC) is an international meeting of Botany, botanists in all scientific fields, authorized by the International Association of Botanical and Mycological Societies (IABMS) and held every six years, with the locatio ...

References

Agaricaceae Secotioid fungi Agaricales genera Taxa named by Vassilii Czernajew Taxa described in 1845 {{agaricaceae-stub

See also

References