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<document id="F4A673410732E1F8A2C859B9A3651D61" 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="D14260EDCB557B701D2D0C100578F17F" docLanguage="en" docName="MycoKeys 50: 1-77" docOrigin="MycoKeys 50" docSource="http://dx.doi.org/10.3897/mycokeys.50.32432" docTitle="Pseudotomentella tristoides Svantesson &amp; K. H. Larss., sp. nov." docType="treatment" docVersion="5" lastPageNumber="43" 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="43" updateTime="1732478795134" updateUser="ExternalLinkService">
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<mods:title id="D21899C7AE8483679EF53122D9E99DA9">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="805F17FDC26E31817221EBBB2F3BAC8B">Svantesson, Sten</mods:namePart>
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<mods:namePart id="027E061DAC173B0EF39041E2209F7566">Larsson, Karl-Henrik</mods:namePart>
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<mods:namePart id="B1DC91BC1DE6444CB0C81CC38ABF45E7">Koljalg, Urmas</mods:namePart>
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<mods:namePart id="FC2DEEB36BF39373F99121B122EFB20C">W. May, Tom</mods:namePart>
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<mods:namePart id="DBBA3E0619A8EAB04B6DDDB3FCEDD3C5">Patrik Cangren,</mods:namePart>
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<mods:namePart id="E0BB31D0E067E71E5E047E0C19A15F86">Henrik Nilsson, R.</mods:namePart>
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<treatment id="D14260EDCB557B701D2D0C100578F17F" ID-GBIF-Taxon="156201980" LSID="urn:lsid:plazi:treatment:D14260EDCB557B701D2D0C100578F17F" httpUri="http://treatment.plazi.org/id/D14260EDCB557B701D2D0C100578F17F" lastPageNumber="43" pageId="42" pageNumber="43" scope_order="Thelephorales" scope_phylum="Basidiomycota">
<subSubSection id="26F92840B62B6C08F0173BC3CB5CA55B" pageId="42" pageNumber="43" type="nomenclature">
<paragraph id="A1AE1811B7C60FEA1882AA0BCF62BBBE" pageId="42" pageNumber="43">
<taxonomicName id="F59AA36697F151114C03421B87786485" ID-CoL="4PDS2" LSID="MB829030" authority="Svantesson &amp; K. H. Larss." class="Agaricomycetes" family="Thelephoraceae" genus="Pseudotomentella" higherTaxonomySource="CoL" kingdom="Fungi" lsidName="Pseudotomentella tristoides" order="Thelephorales" pageId="42" pageNumber="43" phylum="Basidiomycota" rank="species" species="tristoides">
<pageBreakToken id="EEB1C9E63CC6503089C715E463D8B763" pageId="42" pageNumber="43" start="start">Pseudotomentella</pageBreakToken>
tristoides Svantesson &amp; K.H.Larss.
</taxonomicName>
<taxonomicNameLabel id="6F042F7E1F8BBB71870B983B7FEBC353" pageId="42" pageNumber="43">sp. nov.</taxonomicNameLabel>
Fig. 17
</paragraph>
</subSubSection>
<subSubSection id="A31B361D5102B4272D688C334CB580C4" pageId="42" pageNumber="43" type="materials_examined">
<paragraph id="8CB4393291442A702A8C4681A86315FF" pageId="42" pageNumber="43">Type.</paragraph>
<paragraph id="C2393F8F4DDA389E5E55A8F58149625A" pageId="42" pageNumber="43">
NORWAY.
<normalizedToken id="9A06697C94AF0FCDACB9955053CF6FBD" originalValue="Nord-Tröndelag">Nord-Troendelag</normalizedToken>
:
<normalizedToken id="50AFABFCB099B74577743B249E483A05" originalValue="Snåsa">Snasa</normalizedToken>
,
<normalizedToken id="330ECCE53DCEBB70A9DA44BAA8BE2354" originalValue="Bergsåsen">Bergsasen</normalizedToken>
, boreal, deciduous forest on soil with intermediate pH, 28 August 2012, K.-H. Larsson (holotype: O F110306!, GenBank Acc. No. ITS: MK290692).
</paragraph>
</subSubSection>
<subSubSection id="704E162C87E2C7EBDA466BE3843DF04E" pageId="42" pageNumber="43" type="unite sh">
<paragraph id="990FD447339C562FF93789B731316046" pageId="42" pageNumber="43">UNITE SH.</paragraph>
<paragraph id="E768E3BAD950CF06F9900142879A6161" pageId="42" pageNumber="43">SH030566.07FU</paragraph>
</subSubSection>
<subSubSection id="4381027C74813D6BE72003BDE7BA9D25" pageId="42" pageNumber="43" type="etymology">
<paragraph id="9536F25DCE7D5AC5E184E37A05AC3B2A" pageId="42" pageNumber="43">Etymology.</paragraph>
<paragraph id="61AFCBF9D13540700C22584E0B52E1B8" pageId="42" pageNumber="43">
The name refers to the overall similarity between this species and
<taxonomicName id="310029D28F77C0AFB4B9EEAE46125856" lsidName="P. tristis" pageId="42" pageNumber="43" rank="species" species="tristis">P. tristis</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="F9ADE633A58F7E315D0F69F02F2ADB38" pageId="42" pageNumber="43" type="description">
<paragraph id="CDF2198A0C4780CED00F0BB3E5A0C1A2" pageId="42" pageNumber="43">Description.</paragraph>
<paragraph id="3AA10C572B31F883D92436AEAB938919" pageId="42" pageNumber="43">Basidiome annual, resupinate, membranaceous, effused to approximately ten centimetres in diameter. Mature parts continuous, with a rather firm, fibrous and compact, yet quite soft and elastic texture. Hymenium smooth; brown with a reddish hue. Immature parts discontinuous, byssoid with a cottony texture. Subhymenium and hymenium of immature parts initially pale greyish-blue, when more mature dark blue grey. Subiculum well-developed, loose, fibrous, brown with an orange hue; forms the outer edge of the basidiome, extending noticeably beyond the hymenium. All characters recorded in dried state.</paragraph>
<caption id="9A634FCC66BE70B44454BDC44055B9F3" pageId="42" pageNumber="43">
<paragraph id="3889AEA7DECD1120D21A61E99612CA6D" pageId="42" pageNumber="43">
Figure 17. Micromorphological features of
<taxonomicName id="4B528DF1B57CE67BE6998AE5F23104DF" lsidName="P. tristoides" pageId="42" pageNumber="43" rank="species" species="tristoides">P. tristoides</taxonomicName>
in KOH. Holotype: A, B, C basidiospores in frontal face D, E in lateral face E subicular hyphae.
</paragraph>
</caption>
<paragraph id="7FCCD4F4C0B3268D97D15E1E69ED71C9" pageId="42" pageNumber="43">Hyphal cords lacking, but loose bundles of subicular hyphae sometimes present.</paragraph>
<paragraph id="5E116055B14523C161A9EDC35D0C97C5" pageId="42" pageNumber="43">Hyphal system monomitic, clamp connections absent from all hyphae.</paragraph>
<paragraph id="07224EA106999C1473C70463F087307C" pageId="42" pageNumber="43">
Subicular hyphae noticeably long and straight, thick-walled; forming a loose tissue. Individual hyphae (4.7-) 4.9-7.1 (-7.6)
<normalizedToken id="BABBA23F7BFA870FCCF04A0AF525AAB4" originalValue="μm">μm</normalizedToken>
wide, with a mean width of 6.0
<normalizedToken id="C3456CC1773CDB772D87CDB63631BCDE" originalValue="μm">μm</normalizedToken>
; orange brown to dark brown in KOH, orange brown to brown in water.
</paragraph>
<paragraph id="E4E7B4022FFBC5BA7D8A07822117C450" pageId="42" pageNumber="43">
Subhymenial hyphae often somewhat sinuous, thin to thick-walled; forming a rather dense tissue. Individual hyphae (3.1-) 3.2-5.3 (-5.4)
<normalizedToken id="20FC73D5C77E5238D73D1E65BE54CDF2" originalValue="μm">μm</normalizedToken>
wide, with a mean width of 4.6
<normalizedToken id="5A2D32FC61C0A62DA3F4CA9864E9822E" originalValue="μm">μm</normalizedToken>
; pale yellowish-brown in KOH, pale green to blue green in the presence of air; pale green to pale orange green in water, with strongly granular contents.
</paragraph>
<paragraph id="AA52CDEC47E78CAAB87A804BD067B5CA" pageId="42" pageNumber="43">Encrustation granular, amyloid, concolourous with the hyphae in both KOH and water; scattered in occurrence on the upper parts of subhymenial hyphae and on the lower parts of basidia.</paragraph>
<paragraph id="223ED983D9810ADD60115DEE9812AB68" pageId="42" pageNumber="43">
Basidia with four slightly curved sterigmata, occasionally two-sterigmate; clavate to narrowly clavate, sometimes clavopedunculate, thin-walled, with one-three slight constrictions. Dimensions: (49-) 54-72 (-75)
<normalizedToken id="D0650A786BBC960230CD9315697AB320" originalValue="×">x</normalizedToken>
(7.3-) 7.9-10.0 (-10.5)
<normalizedToken id="211295E52498B1F927A740F617A03746" originalValue="μm">μm</normalizedToken>
; mean dimensions: 63
<normalizedToken id="038739ECCD8CC0D0537990B58C1FB66A" originalValue="×">x</normalizedToken>
9.1
<normalizedToken id="3F997E55B9487E4899B28A93D54DEE5D" originalValue="μm">μm</normalizedToken>
. Sterigmata (7.6-) 7.8-9.9 (-10.5)
<normalizedToken id="A7B12E0B939BA88E349518EEAB55E694" originalValue="μm">μm</normalizedToken>
long, with a mean length of 8.6
<normalizedToken id="0A9B30850DED626A9AF8EF3E1CC06606" originalValue="μm">μm</normalizedToken>
. Colours and reactions the same as for the subhymenial hyphae.
</paragraph>
<paragraph id="C36C8731285BBCF4FD27C7AD95735062" pageId="42" pageNumber="43">Cystidial organs lacking.</paragraph>
<paragraph id="7694C071378F785891E4D3A60B4A1164" pageId="42" pageNumber="43">
Basidiospores in frontal face generally with a subcircular basic shape and an angular to nodulose or sometimes cross-shaped outline, covered in bi- or trifurcate, sometimes singularly attached, echinuli. A majority of the spores with three-five indistinct corners to distinct, square lobes; subellipsoid, ovoid and subcircular spores with a rather evenly rounded outline occasionally occurring, as well as subcircular, six-lobed spores; abnormally large spores originating from two-sterigmate basidia infrequently seen. Frontal dimensions: 7.7-8.6 (-8.8)
<normalizedToken id="5467C78EC41D96697D8AAC5A58BC31BF" originalValue="×">x</normalizedToken>
(7.4-) 7.7-9.3 (-9.5)
<normalizedToken id="9C6F101966F0C316DBF19A3ED7E738A7" originalValue="μm">μm</normalizedToken>
; mean dimensions: 8.2
<normalizedToken id="2809DB1EF8EF99332944E4B63706359D" originalValue="×">x</normalizedToken>
8.5
<normalizedToken id="F701424906A78523CD00602C59B0E04E" originalValue="μm">μm</normalizedToken>
; Q-value: 0.9-1.1; mean Q-value: 1.0. Echinuli (0.5-) 0.7-0.9 (-1.1)
<normalizedToken id="90CF98ACF9F27E34203BA82658140C83" originalValue="μm">μm</normalizedToken>
long, with a mean length of 0.8
<normalizedToken id="25408697D5E8EBCC689787B715917884" originalValue="μm">μm</normalizedToken>
. Lateral face ellipsoid, usually with evenly rounded edges, sometimes with one-three lobes. Lateral dimensions: (7.9-) 8.0-8.6
<normalizedToken id="0FE49EAC2B87B35291D6ED178868324B" originalValue="×">x</normalizedToken>
6.0-6.5 (-6.7)
<normalizedToken id="E91215B35E8BAF1FB8977E03B162C83E" originalValue="μm">μm</normalizedToken>
; mean dimensions: 8.2
<normalizedToken id="FFDC6F58A6BB79976407E821D50B3989" originalValue="×">x</normalizedToken>
6.3
<normalizedToken id="FD445A82F699BDDAE32980DA96BF34CB" originalValue="μm">μm</normalizedToken>
; Q-value: 1.2-1.4; mean Q-value: 1.3. Colour in KOH brown to yellow brown, in the presence of air often with a green to blue green reaction; in water pale greenish to pale greenish-orange; occasionally amyloid.
</paragraph>
<paragraph id="3B7EB4CB0D2E67CFF34FB744F635BA3B" pageId="42" pageNumber="43">Chlamydospores lacking.</paragraph>
</subSubSection>
<subSubSection id="9A436307EF019381DD6C4673F0FC1976" pageId="42" pageNumber="43" type="habitat">
<paragraph id="0D8B139695A5B9778EF0D67A05B50EFD" pageId="42" pageNumber="43">Habitat.</paragraph>
<paragraph id="D2F6792992EF7B86F98BD99348B3AA98" pageId="42" pageNumber="43">
The only specimen recorded to date of
<taxonomicName id="CE866C8168B127B4D3C0C8335A553F6E" lsidName="P. tristoides" pageId="42" pageNumber="43" rank="species" species="tristoides">P. tristoides</taxonomicName>
is the type collection, which was obtained in an old, mixed forest on soil with intermediate pH. UNITE sequence metadata show that the species forms ectomycorrhiza with at least
<taxonomicName id="009E612E196E14F9E0D901C817ECDF5B" class="Magnoliopsida" family="Salicaceae" genus="Populus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Populus alba" order="Malpighiales" pageId="42" pageNumber="43" phylum="Tracheophyta" rank="species" species="alba">Populus alba</taxonomicName>
and
<taxonomicName id="35399667C3546E388BDEB20784D3FF01" class="Liliopsida" family="Orchidaceae" genus="Cephalanthera" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Cephalanthera damasonium" order="Asparagales" pageId="42" pageNumber="43" phylum="Tracheophyta" rank="species" species="damasonium">Cephalanthera damasonium</taxonomicName>
(
<bibRefCitation id="4150F69203AAC3884AFD67D416525A42" 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="102196010CE519D0CBFA26B06729A04E" originalValue="Kõljalg">Koljalg</normalizedToken>
et al. 2005
</bibRefCitation>
,
<bibRefCitation id="0FB5F13CBDDEE04740070C4AA1209A10" 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="D7AB3FC6F3A7DBAA798CAEE3B9439F30" pageId="42" pageNumber="43" type="distribution">
<paragraph id="280BC3798D26AA3AA8771BC7F1242955" pageId="42" pageNumber="43">Distribution.</paragraph>
<paragraph id="05F5ABA16300A3F8354D6FFD96C84EA8" pageId="42" pageNumber="43">Basidiomata encountered in: Norway. Soil or root tip samples confirm presence also in: Estonia and the Czech Republic.</paragraph>
</subSubSection>
<subSubSection id="D05C2B383EB90C193D215F93BA29E19F" pageId="42" pageNumber="43" type="remarks">
<paragraph id="59A224BDDE5E3E33F31E846ACD7036C9" pageId="42" pageNumber="43">Remarks.</paragraph>
<paragraph id="E44BC1457881C5E4B39E4AC6FBFB2F84" pageId="42" pageNumber="43">
Within the
<taxonomicName id="EFC327BB7D91E5E755DF5083953DAEB6" lsidName="P. tristis" pageId="42" pageNumber="43" rank="species" species="tristis">P. tristis</taxonomicName>
group, the basidiome of
<taxonomicName id="C52FBD933B54677FC26D806C5C28E407" lsidName="P. tristoides" pageId="42" pageNumber="43" rank="species" species="tristoides">P. tristoides</taxonomicName>
can be recognised by its lack of hyphal cords and skeletal hyphae and its soft, yet rather firm and compact and
<normalizedToken id="82DBAA99333C49A80CCD233B6C00E22C" originalValue="±">+/-</normalizedToken>
elastic texture after drying, bluish to greenish colour of immature parts, wide subicular hyphae, medium sized, angular-nodulose spores and relatively short echinuli and sterigmata.
<taxonomicName id="ADC8CD43E5B83477891A113181F95FE4" class="Agaricomycetes" family="Thelephoraceae" genus="Pseudotomentella" higherTaxonomySource="CoL" kingdom="Fungi" lsidName="Pseudotomentella tristis" order="Thelephorales" pageId="42" pageNumber="43" phylum="Basidiomycota" rank="species" species="tristis">Pseudotomentella tristis</taxonomicName>
is similar but has longer echinuli and sterigmata,
<taxonomicName id="1741F7F170931C1B92B04090BAB20F1D" lsidName="P. sciastra" pageId="42" pageNumber="43" rank="species" species="sciastra">P. sciastra</taxonomicName>
has smaller, star-shaped spores and
<taxonomicName id="698509D69B9A2F5896B7116B0F84A095" lsidName="H. rhacodium" pageId="42" pageNumber="43" rank="species" species="rhacodium">H. rhacodium</taxonomicName>
(only known from the type) has hard, brittle basidiomata after drying.
</paragraph>
</subSubSection>
</treatment>
</document>