{{Short description|Genus of fungi}} {{Automatic taxobox | image = Typhula juncea 177895.jpg | image_caption = ''Macrotyphula juncea'' | taxon = Macrotyphula | authority = R.H.Petersen (1972) | type_species = ''Macrotyphula fistulosa'' | type_species_authority = (Holmsk.) R.H.Petersen (1972) | synonyms =''Sclerotium'' <small>Tode (1790)</small> | subdivision_ranks = Species | subdivision = ''M. contorta''<br> ''M. cordispora''<br> ''M. defibulata''<br> ''M. fistulosa''<br> ''M. juncea''<br> ''M. megasperma''<br> ''M. phacorrhiza''<br> ''M. rigida''<br> ''M. rhizomorpha''<br> ''M. tremula''

}}

'''''Macrotyphula''''' is a genus of clavarioid fungi in the family Phyllotopsidaceae.<ref name="Olariaga2020"/> Basidiocarps (fruit bodies) are simple, narrowly club-shaped to filiform, sometimes arising from a sclerotium. They typically grow on dead wood or leaf litter, often in swarms.

==Taxonomy==

The genus was described in 1972 by American mycologist Ronald H. Petersen for ''M.&nbsp;fistulosa'' which he considered morphologically distinct from species in the genus ''Clavariadelphus'' where it had previously been referred.<ref name="Petersen 1972"/> Additional species have subsequently been referred to ''Macrotyphula''. Molecular research, based on cladistic analysis of DNA sequences, indicates that the genus is monophyletic and forms a natural group.<ref name="Olariaga2020"/>

===The genus ''Sclerotium''=== ''Sclerotium'' was introduced by the German mycologist and theologian Heinrich Julius Tode in 1790 to accommodate fungal sclerotia (propagules composed of thick-walled hyphae). Over 400 species were subsequently added to this form genus, comprising sclerotia or sclerotia-like entities from a wide range of fungi within the phyla Ascomycota and Basidiomycota.

With a move towards a more natural classification of fungi, the genus ''Sclerotium'' was restricted to sclerotial anamorphs of ''Macrotyphula'', since the type species, ''Sclerotium complanatum'', is the anamorph of ''Macrotyphula phacorrhiza''.<ref name="Olariaga2020"/> Other species have been transferred elsewhere.<ref name="Xuetal2010"/> Following changes to the International Code of Nomenclature for algae, fungi, and plants, the practice of giving different names to teleomorph and anamorph forms of the same fungus was discontinued, meaning that ''Macrotyphula'' should become a synonym of the earlier name ''Sclerotium''. A formal proposal to conserve the genus ''Macrotyphula'' against ''Sclerotium'' is, however, in preparation.<ref name="Olariaga2020"/>

==See also== *List of Agaricales genera

==References== {{Reflist|refs=

<ref name="Olariaga2020">{{cite journal |author=Olariaga I, Huhtinen S, Læssøe T, Petersen JH, Hansen K |title=Phylogenetic origins and family classification of typhuloid fungi, with emphasis on ''Ceratellopsis'', ''Macrotyphula'' and ''Typhula'' (Basidiomycota) |journal=Studies in Mycology |volume=96 |year=2020 |pages=155–184 |doi=10.1016/j.simyco.2020.05.003|pmid=32774511 |pmc=7388190 }}</ref>

<ref name="Petersen 1972">{{cite journal |author=Petersen RH |title=Notes on clavarioid fungi. XII. Miscellaneous notes on ''Clavariadelphus'', and a new segregate genus |journal=Mycologia |year=1972 |volume=64 |issue=1 |pages=137–52 |url=http://www.cybertruffle.org.uk/cyberliber/59350/0064/001/0137.htm |doi=10.2307/3758022|jstor=3758022 |url-access=subscription }}</ref>

<ref name="Xuetal2010">{{cite journal |doi=10.3852/08-189 |vauthors=Xu Z, Harrington TC, Gleason ML, Batzer JC |year=2010 |title=Phylogenetic placement of plant pathogenic ''Sclerotium'' species among teleomorph genera |journal=Mycologia |volume=102 |issue=2 |pages=337–346 |pmid=20361501 |s2cid=33608842 }} http://www.public.iastate.edu/~tcharrin/Sclerotium.pdf</ref> }}

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Category:Agaricales genera Category:Taxa named by Ron Petersen

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