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<document id="D6D6682A883CDA0F04AA674BC64B40F9" ID-DOI="http://dx.doi.org/10.3897/mycokeys.50.32432" ID-GBIF-Dataset="059c89da-7ae5-4dbb-b876-bd1617110873" ID-PMC="PMC6477855" ID-Pensoft-Pub="1314-4049-50-1" ID-PubMed="31043855" ModsDocAuthor="" ModsDocDate="2019" ModsDocID="1314-4049-50-1" ModsDocOrigin="MycoKeys 50" ModsDocTitle="Solving the taxonomic identity of Pseudotomentellatristis s.l. (Thelephorales, Basidiomycota) a multi-gene phylogeny and taxonomic review, integrating ecological and geographical data" checkinTime="1555333405629" checkinUser="pensoft" docAuthor="Svantesson, Sten, Larsson, Karl-Henrik, Koljalg, Urmas, W. May, Tom, Patrik Cangren,, Henrik Nilsson, R. &amp; Larsson, Ellen" docDate="2019" docId="E22805473683D2660B10B962986E61A7" docLanguage="en" docName="MycoKeys 50: 1-77" docOrigin="MycoKeys 50" docSource="http://dx.doi.org/10.3897/mycokeys.50.32432" docTitle="Pseudotomentella umbrinascens Svantesson, sp. nov." docType="treatment" docVersion="5" lastPageNumber="50" masterDocId="BF413468CD59FFA53A5DFFC1FF9F272E" masterDocTitle="Solving the taxonomic identity of Pseudotomentellatristis s. l. (Thelephorales, Basidiomycota) - a multi-gene phylogeny and taxonomic review, integrating ecological and geographical data" masterLastPageNumber="77" masterPageNumber="1" pageNumber="49" updateTime="1732478795134" updateUser="ExternalLinkService">
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<mods:title id="0ABD21F1E2E92F4DB5BB3549A8B6267E">Solving the taxonomic identity of Pseudotomentellatristis s. l. (Thelephorales, Basidiomycota) - a multi-gene phylogeny and taxonomic review, integrating ecological and geographical data</mods:title>
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<mods:namePart id="ED40FCFE7088F8C3330ABE7EB1B03267">Svantesson, Sten</mods:namePart>
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<mods:namePart id="BD13D8FB643F4D0FDF136D9C8DF941B1">Larsson, Karl-Henrik</mods:namePart>
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<mods:namePart id="5A1213BD68EDDBA84C51E0B63987C8A5">Koljalg, Urmas</mods:namePart>
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<mods:namePart id="5DCF953F0B48108A8B82BDD756E5AA93">W. May, Tom</mods:namePart>
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<mods:namePart id="962A2BD0B3BE856F7D4C67CAA53144A9">Patrik Cangren,</mods:namePart>
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<mods:namePart id="30DB45393956980CE4FCDFE89F25EDD2">Henrik Nilsson, R.</mods:namePart>
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<mods:namePart id="180E84EC8D95A548BC2E54DDC3156B8E">Larsson, Ellen</mods:namePart>
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<treatment id="E22805473683D2660B10B962986E61A7" ID-GBIF-Taxon="156201978" LSID="urn:lsid:plazi:treatment:E22805473683D2660B10B962986E61A7" httpUri="http://treatment.plazi.org/id/E22805473683D2660B10B962986E61A7" lastPageId="49" lastPageNumber="50" pageId="48" pageNumber="49" scope_order="Thelephorales" scope_phylum="Basidiomycota">
<subSubSection id="1250863D1AE0378455720F301B4C6894" pageId="48" pageNumber="49" type="nomenclature">
<paragraph id="AA09CF0BE826B4A87E5C72D8856B98FC" pageId="48" pageNumber="49">
<taxonomicName id="36804D768081892A0C575D21C1C6025A" ID-CoL="4PDS4" LSID="MB829031" authority="Svantesson" class="Agaricomycetes" family="Thelephoraceae" genus="Pseudotomentella" higherTaxonomySource="CoL" kingdom="Fungi" lsidName="Pseudotomentella umbrinascens" order="Thelephorales" pageId="48" pageNumber="49" phylum="Basidiomycota" rank="species" species="umbrinascens">
<pageBreakToken id="3397D907A139F28A7F4FF1C85E47B6CB" pageId="48" pageNumber="49" start="start">Pseudotomentella</pageBreakToken>
umbrinascens Svantesson
</taxonomicName>
<taxonomicNameLabel id="7D30447580C294620FCE16AE666BE681" pageId="48" pageNumber="49">sp. nov.</taxonomicNameLabel>
Fig. 19
</paragraph>
</subSubSection>
<subSubSection id="DBCF3D8DB60EEC870BB188D98F3C9D1C" pageId="48" pageNumber="49" type="materials_examined">
<paragraph id="A4265C6C7829F35BFC8B63550250622D" pageId="48" pageNumber="49">Type.</paragraph>
<paragraph id="BF74764C0B7A23E36C34981AE9BCA72D" pageId="48" pageNumber="49">
SWEDEN.
<normalizedToken id="D5B962217A8DC8002D4BBA84B5DC942E" originalValue="Bohuslän">Bohuslaen</normalizedToken>
: Tanum (municipality), Tanum (parish), Greby Kleva, boreonemoral, deciduous forest on soil with high pH, RT90: E1236840, N6518916, 6 September 2016, S. Svantesson 335 (holotype: GB!, GenBank Acc. No. ITS: MK290697)
</paragraph>
</subSubSection>
<subSubSection id="B7A4F1A04A4795E3F7A966A1EC2B553D" pageId="48" pageNumber="49" type="unite sh">
<paragraph id="FA24B38DA9596A6E455403D4718FE1CB" pageId="48" pageNumber="49">UNITE SH.</paragraph>
<paragraph id="C4D89795F3FAB1E253DC5EADB5AA172E" pageId="48" pageNumber="49">SH030563.07FU</paragraph>
</subSubSection>
<subSubSection id="6A1666713C42105C6E9A9698C5607632" pageId="48" pageNumber="49" type="etymology">
<paragraph id="D8C18129BCBAA5A15492F874C3E95596" pageId="48" pageNumber="49">Etymology.</paragraph>
<paragraph id="9570B556A855FD785F07975E14CF2487" pageId="48" pageNumber="49">
The name refers to the overall morphological similarity to
<taxonomicName id="91AAEF9D25B60D78B4A8D61D47C37506" lsidName="P. umbrina" pageId="48" pageNumber="49" rank="species" species="umbrina">P. umbrina</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="5B76790300BD985EAAF0A6953FF05BA8" lastPageId="49" lastPageNumber="50" pageId="48" pageNumber="49" type="description">
<paragraph id="0E00DD472B3BAE0DBF09D05233AE6CCA" pageId="48" pageNumber="49">Description.</paragraph>
<paragraph id="66E37793AA65D2343DC02517F25EB311" pageId="48" pageNumber="49">Basidiome annual, resupinate, membranaceous, effused to approximately ten centimetres in diameter. Mature parts continuous, with a cottony texture when fresh and a rather firm, fibrous and compact, yet quite soft and elastic texture when dried. Hymenium smooth; greenish-brown when fresh, pale brown when dried. Immature parts discontinuous, byssoid with a cottony texture, both when fresh and when dried. Subhymenium and hymenium of the immature parts initially yellowish-white to pale brown, in the dried basidiome, when more mature pale brown. Subiculum well developed, loose, fibrous, pale yellowish-brown to pale orange brown; forms the outer edge of the basidiome, extending noticeably beyond the hymenium.</paragraph>
<caption id="C7C844427894AEB576D9A9A699755F7D" pageId="48" pageNumber="49">
<paragraph id="702B71C3A410E4A011CC2C4F1C949175" pageId="48" pageNumber="49">
Figure 19. Micromorphological features of
<taxonomicName id="993978B738FA29A07985480053F8D4CC" lsidName="P. umbrinascens" pageId="48" pageNumber="49" rank="species" species="umbrinascens">P. umbrinascens</taxonomicName>
in KOH. Holotype: A, B, C basidiospores in frontal face D, E in lateral face E subicular hyphae.
</paragraph>
</caption>
<paragraph id="7CED1111EACBD7BECA2964562243E15C" pageId="48" pageNumber="49">Hyphal cords lacking, but loose bundles of subicular hyphae sometimes present.</paragraph>
<paragraph id="4DF30AADAD3369855840A5241DE535DA" pageId="48" pageNumber="49">
Hyphal system monomitic, clamp connections and reaction in
<normalizedToken id="CFCEF33323A9CD27F5DEBF83F4398309" originalValue="Melzers">Melzer's</normalizedToken>
reagent absent from all hyphae.
</paragraph>
<paragraph id="7DAF256CBF7F65CBC08606011C3C3F62" pageId="48" pageNumber="49">
Subicular hyphae noticeably long and straight, thick-walled; forming a loose tissue. Individual hyphae 3.1-) 3.2-4.3 (-4.8)
<normalizedToken id="58016559AD0BEF26C220400F926948C1" originalValue="μm">μm</normalizedToken>
wide, with a mean width of 3.7
<normalizedToken id="2492729945E47C4C0D30CA892A247EC2" originalValue="μm">μm</normalizedToken>
; pale orange brown to brown in KOH, orange brown in water.
</paragraph>
<paragraph id="63050291918D8F65C0776BA86D321E86" pageId="48" pageNumber="49">
Subhymenial hyphae often somewhat sinuous, thin to thick-walled; forming a rather dense tissue. Individual hyphae 3.6-5.7 (-7.1)
<normalizedToken id="8F595292B0F2B2222A7FB0F9B43B9AAB" originalValue="μm">μm</normalizedToken>
wide, with a mean width of 4.5
<normalizedToken id="C3D46A5839117FD40702E3B7230DA253" originalValue="μm">μm</normalizedToken>
; pale grey brown to grey brown or brown in KOH; orange brown to pale green in water (but not with the blue green reaction present in other species), with strongly granular contents.
</paragraph>
<paragraph id="FFCCC7F797AF887C4FADB4AF41B0B53A" pageId="48" pageNumber="49">Encrustation not seen.</paragraph>
<paragraph id="A149DDCA63384FA4844A763F1CB5D87B" pageId="48" pageNumber="49">
Basidia with four slightly curved sterigmata, occasionally two-sterigmate; clavate to narrowly clavate, sometimes clavopedunculate, thin-walled, with one-three slight constrictions. Dimensions: (57-) 58-71 (-75)
<normalizedToken id="F0E82EBB8E0A7A82908CEA4B2E8CE683" originalValue="×">x</normalizedToken>
(8.8-) 9.5-11.5 (-12.5)
<normalizedToken id="FED54E0C66488B452BC938430727C3D5" originalValue="μm">μm</normalizedToken>
; mean dimensions: 64
<normalizedToken id="618993DB1AD6109FF7E06887645DB976" originalValue="×">x</normalizedToken>
10.6
<normalizedToken id="D36CEF4B13B9FC377F849794BD219D4A" originalValue="μm">μm</normalizedToken>
. Sterigmata 8.1-9.5 (-10.1)
<normalizedToken id="38FEF2C467BFC5EBF254EDCB89AB7082" originalValue="μm">μm</normalizedToken>
long, with a mean length of 8.6
<normalizedToken id="8339B39C4556E302C88784B00D26DF23" originalValue="μm">μm</normalizedToken>
. Colours and reactions the same as for the subhymenial hyphae, but in addition sometimes with granular contents in KOH.
</paragraph>
<paragraph id="DBC2CF7633575F58A0EF8E7DF33C7EEE" pageId="48" pageNumber="49">Cystidial organs lacking.</paragraph>
<paragraph id="CE2584CBBB50F4F5D94F61A357FC116E" pageId="48" pageNumber="49">
Basidiospores in frontal face generally with a triangular or subcircular basic shape and an angular to cross-shaped or sometimes nodulose outline, covered in bi- or trifurcate, sometimes singularly attached, echinuli. Nearly all spores with three-four distinct, often rounded lobes; subcircular, five-lobed spores infrequently occurring, as well as abnormally large spores originating from two-sterigmate basidia. Frontal dimensions: (8.5-) 8.7-9.4 (-9.6)
<normalizedToken id="79CF0EC8C927F367FF5889FF5E144020" originalValue="×">x</normalizedToken>
(8.4-) 8.7-9.2 (-9.3)
<normalizedToken id="17BC5AF504317CA8B9E3A7A72F2A1C23" originalValue="μm">μm</normalizedToken>
; mean dimensions: 8.9
<normalizedToken id="23AFB52960ED79581CB6AA7DF45C10B7" originalValue="×">x</normalizedToken>
8.9
<normalizedToken id="17E5B0617ECDE5A5DFF4E4E4B6726EE3" originalValue="μm">μm</normalizedToken>
; Q-value: 1.0 (-1.1); mean Q-value: 1.0. Echinuli (0.9-) 1.0-1.9 (-2.0)
<normalizedToken id="014105F992F5ABB7E65593CF7562D675" originalValue="μm">μm</normalizedToken>
long, with a mean length of 1.6
<normalizedToken id="51F38970D20645DAE20D346DCF54FD9C" originalValue="μm">μm</normalizedToken>
. Lateral face ellipsoid to narrowly ovoid or sometimes semicircular in shape, usually with evenly rounded edges, sometimes with one-three lobes. Lateral dimensions: 8.5-9.2 (-9.4)
<normalizedToken id="54BFFCC57AC671C53E5C1884519EFA6C" originalValue="×">x</normalizedToken>
(5.7-) 6.0-6.5
<normalizedToken id="21CF057A5976A5D4895490356BAB62B9" originalValue="μm">μm</normalizedToken>
; mean dimensions: 8.9
<normalizedToken id="EEE11F1A8AD00498E8C5FF134530A462" originalValue="×">x</normalizedToken>
6.2
<normalizedToken id="E454CBE8BC8FDE70F69C4CFE87541F7A" originalValue="μm">μm</normalizedToken>
; Q-value: 1.3-1.5 (-1.6); mean Q-value: 1.4. Colour in KOH pale brown to pale greenish-brown colour; in water pale brownish-orange to pale greenish-orange; inamyloid.
</paragraph>
<paragraph id="DAC048501AFD44239A54D6D44FF74295" pageId="49" pageNumber="50">
<pageBreakToken id="42114FCE46AC9BB862D3699EACDF1234" pageId="49" pageNumber="50" start="start">Chlamydospores</pageBreakToken>
lacking.
</paragraph>
</subSubSection>
<subSubSection id="4CA5BC135B4DC10779DBE5320A4EE1BF" pageId="49" pageNumber="50" type="habitat">
<paragraph id="F10F44DC9BF606AB0F929E54CAD6BEB1" pageId="49" pageNumber="50">Habitat.</paragraph>
<paragraph id="22F3060415B6E3BE95AD40F7B1DD47DF" pageId="49" pageNumber="50">
The only specimen recorded to date of
<taxonomicName id="382322D926C4108E5C738691F755D2C2" lsidName="P. umbrinascens" pageId="49" pageNumber="50" rank="species" species="umbrinascens">P. umbrinascens</taxonomicName>
is the type collection, which was obtained in an old, coastal, deciduous forest on soil with high pH. UNITE sequence metadata shows that the species forms ectomycorrhiza with at least
<taxonomicName id="2FF9F84E1CDF615AD81DCF40470F09B6" class="Magnoliopsida" family="Betulaceae" genus="Corylus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Corylus avellana" order="Fagales" pageId="49" pageNumber="50" phylum="Tracheophyta" rank="species" species="avellana">Corylus avellana</taxonomicName>
(
<bibRefCitation id="CE4FCFDE4B345AB5BEA5E7F8ABAB25B6" author="Koljalg, U" journalOrPublisher="New Phytologist" pageId="61" pageNumber="62" pagination="1063 - 1068" title="UNITE: a database providing web-based methods for the molecular identification of ectomycorrhizal fungi." url="https://doi.org/10.1111/j.1469-8137.2005.01376.x" volume="166" year="2005">
<normalizedToken id="2BE098C6CF611F5689525A2ABDAD4CDA" originalValue="Kõljalg">Koljalg</normalizedToken>
et al. 2005
</bibRefCitation>
,
<bibRefCitation id="EB149AF5BCBCAD4A9A1FAD1195669021" author="Nilsson, RH" journalOrPublisher="MycoKeys" pageId="62" pageNumber="63" url="https://doi.org/10.1093/nar/gky1022" year="2019">Nilsson et al. 2019</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="7BE691DA3F0B2E99BFD02F1E00C8BA03" pageId="49" pageNumber="50" type="distribution">
<paragraph id="CE559C57055C5B3C03F8C51A4E17F5C2" pageId="49" pageNumber="50">Distribution.</paragraph>
<paragraph id="AF945C5ADECAC7C3E388BD7AEFBE0AB1" pageId="49" pageNumber="50">Basidiomata encountered in: Sweden. Soil or root tip samples confirm presence also in: Italy.</paragraph>
</subSubSection>
<subSubSection id="5E752F8FBC13C362ED837E41342223D4" pageId="49" pageNumber="50" type="remarks">
<paragraph id="2F75032C74B83C098CF509C165463A9C" pageId="49" pageNumber="50">Remarks.</paragraph>
<paragraph id="8FDFEEEC4867290080807D175B42E292" pageId="49" pageNumber="50">
Within the
<taxonomicName id="5502CC43D9C000E88C7D5D54DE909AFC" lsidName="P. tristis" pageId="49" pageNumber="50" rank="species" species="tristis">P. tristis</taxonomicName>
group, basidiomata of
<taxonomicName id="D38F96F9D163063D5CFEF9D1C275BC75" lsidName="P. umbrinascens" pageId="49" pageNumber="50" rank="species" species="umbrinascens">P. umbrinascens</taxonomicName>
can be recognised by their brown colour, their soft, rather elastic texture after drying and their microcharacters. Blue or green colours are completely absent from immature parts and from the subhymenium of mature parts.
<taxonomicName id="4E9F6B3F5C470B069ECC8CA601BA74D7" class="Agaricomycetes" family="Thelephoraceae" genus="Pseudotomentella" higherTaxonomySource="CoL" kingdom="Fungi" lsidName="Pseudotomentella umbrina" order="Thelephorales" pageId="49" pageNumber="50" phylum="Basidiomycota" rank="species" species="umbrina">Pseudotomentella umbrina</taxonomicName>
is very similar but has slightly different microcharacters (see key).
<taxonomicName id="1E371A62AC8603D946557DB1ACA715ED" class="Agaricomycetes" family="Thelephoraceae" genus="Hypochnus" higherTaxonomySource="CoL" kingdom="Fungi" lsidName="Hypochnus rhacodium" order="Thelephorales" pageId="49" pageNumber="50" phylum="Basidiomycota" rank="species" species="rhacodium">Hypochnus rhacodium</taxonomicName>
(only known from the type) is also similar but has basidiomata that are hard and brittle after drying.
</paragraph>
</subSubSection>
</treatment>
</document>