Pseudoomphalina

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***Pseudoomphalina*** is a genus of fungi in the placed in the family Tricholomataceae for convenience. The genus contains six species that are widespread in northern temperate areas. *Pseudoomphalina* was circumscribed by Rolf Singer in 1956. *Pseudoomphalina* was found to be paraphyletic to *Neohygrophorus* in a molecular phylogenetics study and since *Pseudoomphalina* is an older name, *Neohygrophyorus* was synonymized with it. The type species of *Neohygrophorus* was *Neohygrophorus angelesianus*, now *Pseudoomphalina angelesiana*. In earlier classifications based on anatomy prior to DNA sequence-based classifications, its unusual combination of features led taxonomists to independently create two subgenera in two genera: *Hygrophorus* subg. *Pseudohygrophorus* and *Clitocybe* subg. *Mutabiles*; the latter based on *Neohygrophorus angelesianus* but described under a new species name which is now placed in synonymy, *Clitocybe mutabilis*. All species of *Pseudoomphalina* are united by the presence of clamp-connections in their hyphae, an interwoven gill trama and amyloid spores. *Pseudoomphalina angelesiana* possesses grey-violaceous pigments
that turn red in alkali solutions and lacks filiform, hyphal sterile elements in its hymenium and stipitipellis. These were features used to distinguish it from *Pseudoomphalina* as a genus, but *Pseudoomphalina umbrinopurpurascens* possesses these same pigments and the filiform elements of *Pseudoomphalina*. Molecular phylogenetics studies have also found some former species of *Pseudoomphalina* to belong in other genera. *Pseudoomphalina pachyphylla* was moved to its own genus, *Pseudolaccaria*, and *Pseudoomphalina clusiliformis* was synonymized with it. *Pseudoomphalina flavoaurantia* and *Pseudoomphalina lignicola* were found to belong in *Clitocybula*. Phylogenetically, *Pseudoomphalina* is in a tricholomatoid clade but not in the Tricholomataceae.

## See also

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* List of Tricholomataceae genera

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Cite error: Invalid `<ref>` tag; no text was provided for refs named `Vizzini 2015`
2. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Kirk 2008`
3. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Singer 1956`
4. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Singer1961`
5. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Hesler_Smith1963`
6. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Smith_Hesler1942`
7. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Bigelow1985`
8. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Bigelow1977`
9. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Malysheva 2011`
10. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Moncalvo2002`
11. ↑ Cite error: Invalid `<ref>` tag; no text was provided for refs named `Matheny2006`

## External links

* Template:IndexFungorum
* Mykoweb - *Pseudoomphalina angelesiana*
* Cripps - Snowbank Fungi Revisited

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