Requienellaceae
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| Requienellaceae | |
|---|---|
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Sordariomycetes |
| Order: | Xylariales |
| Family: | Requienellaceae Boise (1986) |
| Type genus | |
| Requienella Fabre (1883) | |
| Genera | |
The Requienellaceae are a family of ascomycete fungi in the order Xylariales. Members of the family occur on bark, wood, and sometimes lichens. The family was originally proposed for fungi thought to be allied with the Pyrenulales, but molecular phylogenetic studies later showed that its type genus, Requienella, belongs in Xylariales.
Requienellaceae was circumscribed by Jean Boise in 1986 for a group of fungi studied during research on Trematosphaeria, and she established the family with Requienella as its type genus.[1] The type genus itself had originally been erected by Jean-Henri Fabre in 1883.[2] In Boise's treatment, the family was placed in the Melanommatales sensu Barr or the Pyrenulales sensu Eriksson and Hawksworth, reflecting the uncertain position then assigned to these fungi on morphological grounds.[1]
Boise also reinstated Requienella, noted that the name had often been misspelt "Requinella" in earlier mycological literature, and selected R. seminuda as the lectotype species of the genus.[1] In doing so, she treated R. olearum as a synonym of R. seminuda and pointed out that the fungus widely identified under the name Sphaeria seminuda in some older literature was actually a species of Melanomma.[1] Boise further regarded Trematomyces and Acrocordiella as synonyms of Requienella.[1]
A molecular study published in 2016, however, showed that Requienella belongs in the order Xylariales, not among the dothideomycetes where it had often been placed, and also found that Acrocordiella is not congeneric with Requienella.[3] Subsequent authors retained Requienellaceae in Xylariales and generally accepted Requienella and Acrocordiella in the family, although broader circumscriptions that also included Lacrymospora and Parapyrenis were proposed in some treatments and remain unsettled.[4][5]