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<document ID-CLB-Dataset="7250" ID-DOI="http://dx.doi.org/10.3897/mycokeys.79.63363" ID-GBIF-Dataset="cec973b7-30eb-4570-afc1-159895cffa7c" ID-PMC="PMC8076164" ID-Pensoft-Pub="1314-4049-79-17" ID-Pensoft-UUID="CEDC3742C169540583072E7995018533" ID-PubMed="33958950" ModsDocID="1314-4049-79-17" checkinTime="1618878569608" checkinUser="pensoft" docAuthor="Eberhardt, Ursula, Beker, Henry J., Borgen, Torbjorn, Knudsen, Henning, Schuetz, Nicole &amp; Elborne, Steen A." docDate="2021" docId="793409B2235C5E1A9E4F1FC7FF32FB3E" docLanguage="en" docName="MycoKeys 79: 17-118" docOrigin="MycoKeys 79" docPubDate="2021-04-19" docSource="http://dx.doi.org/10.3897/mycokeys.79.63363" docTitle="Hebeloma islandicum Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414 2016" docType="treatment" docVersion="6" id="CEDC3742C169540583072E7995018533" lastPageNumber="17" masterDocId="CEDC3742C169540583072E7995018533" masterDocTitle="A survey of Hebeloma (Hymenogastraceae) in Greenland" masterLastPageNumber="118" masterPageNumber="17" pageNumber="17" updateTime="1720462698628" updateUser="ExternalLinkService">
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<mods:title id="5FF91F858036154755ECBE8E3A2CE358">A survey of Hebeloma (Hymenogastraceae) in Greenland</mods:title>
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<mods:namePart id="ADD754478B918A751B0BF55F9B000E8E">Eberhardt, Ursula</mods:namePart>
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<mods:namePart id="3244F34DD893500FCC0212DED6CBD9C8">Beker, Henry J.</mods:namePart>
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<mods:affiliation id="C74B8780007D94A3EEBD7BA62AC5FA42">Rue Pere de Deken 19, B- 1040 Bruxelles, Belgium &amp; Royal Holloway College, University of London, Egham, UK &amp; Plantentuin Meise, Nieuwelaan 38, B- 1860 Meise, Belgium</mods:affiliation>
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<mods:namePart id="94A80A41EDC60C466FFFF146C4D1508B">Borgen, Torbjorn</mods:namePart>
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<mods:affiliation id="DA6592C26AD33949800FFF19065E9FA6">Sensommervej 142, 8600 Silkeborg, Denmark</mods:affiliation>
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<mods:namePart id="D8D5443D1027E55F572E4844DBE46471">Knudsen, Henning</mods:namePart>
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<mods:namePart id="0E466578BD49F4FE9999419AAFF3521A">Schuetz, Nicole</mods:namePart>
<mods:affiliation id="BD48E7EAB5C4FD949CFDE9AD03445FF3">Staatliches Museum fuer Naturkunde Stuttgart, Rosenstein 1, D- 70191 Stuttgart, Germany</mods:affiliation>
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<mods:namePart id="46C40D3642A7C093B7FF8A3E51DB8444">Elborne, Steen A.</mods:namePart>
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<subSection id="3471AB2D8BB4EBC4ABDB4AE8F0FF780C" pageId="0" pageNumber="17" type="multiple">
<treatment id="793409B2235C5E1A9E4F1FC7FF32FB3E" ID-GBIF-Taxon="181518927" LSID="urn:lsid:plazi:treatment:793409B2235C5E1A9E4F1FC7FF32FB3E" httpUri="http://treatment.plazi.org/id/793409B2235C5E1A9E4F1FC7FF32FB3E" lastPageNumber="17" pageId="0" pageNumber="17">
<subSubSection id="FFCFE414978B0259A23F0D51AA8389E6" pageId="0" pageNumber="17" type="nomenclature">
<paragraph id="AF4D7EE9FE7CEA1DA48B1045DBF9321A" pageId="0" pageNumber="17">
<taxonomicName id="39016AC0A023DD8185B3F58C891F077B" ID-CoL="3JXQD" LSID="793409B2-235C-5E1A-9E4F-1FC7FF32FB3E" authority="Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414, 2016." authorityName="Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414" authorityYear="2016" class="Agaricomycetes" family="Hymenogastraceae" genus="Hebeloma" higherTaxonomySource="treatment-meta" kingdom="Fungi" lsidName="Hebeloma islandicum" order="Agaricales" pageId="0" pageNumber="17" phylum="Basidiomycota" rank="species" species="islandicum">Hebeloma islandicum Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414, 2016.</taxonomicName>
<figureCitation id="0ED98473BE22A24C80E72B79F601BAC2" captionStart="Figure 35" captionStartId="F35" captionText="Figure 35. Hebeloma islandicum A TB 19.81, photograph T. Borgen B distribution of cited collections; C spores x 1600 and D cheilocystidia x 1000 of TB 86.291 in Melzer's reagent. Scale bars: 5 µm; microphotographs H. K. J. Beker." figureDoi="10.3897/mycokeys.79.63363.figure35" httpUri="https://binary.pensoft.net/fig/533426" pageId="0" pageNumber="17">Fig. 35</figureCitation>
</paragraph>
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<subSubSection id="63E5019C14088BAD289AE9CC7556ACA5" pageId="0" pageNumber="17" type="description">
<paragraph id="0E69F3178683729981904CF90182E234" pageId="0" pageNumber="17">Macroscopic description.</paragraph>
<paragraph id="4F9656CA71882D07959392D22FD836A9" pageId="0" pageNumber="17">
Cap 2.0-4.0 cm in diameter, convex to umbonate, margin involute when young, smooth, tacky when moist, not hygrophanous, uniformly colored or bicolored, at center dark olive buff to yellowish brown, at margin cream, innately fibrillose, sometimes with remnants of universal veil. Lamellae initially pale clay, in age often brownish, emarginate, maximum depth 5 mm, number of lamellae {L} 40-50, droplets visible with naked eye, with white fimbriate edge. Stem 1.7-2.5
<normalizedToken id="C0B860FC6CBB6C20D9EE6D40A13801BB" originalValue="×">x</normalizedToken>
0.4-0.6 {median}
<normalizedToken id="33A957676C4F73455765047E56B150A7" originalValue="×">x</normalizedToken>
0.5-0.7 {base} cm, stem Q 3.4-5.5, whitish pale, finely flocculose-tomentose in the entire length with clavate base. Context firm, stem interior stuffed, later hollow, flesh usually discoloring from base. Smell raphanoid. Taste mild or slightly bitter. Spore deposit not recorded.
</paragraph>
<caption id="13A74D413942C4B60F1DCBFB6D819C39" doi="10.3897/mycokeys.79.63363.figure35" httpUri="https://binary.pensoft.net/fig/533426" pageId="0" pageNumber="17" start="Figure 35" startId="F35">
<paragraph id="E16B59804BA67A4AC64DB89DD2D22D67" pageId="0" pageNumber="17">
<emphasis id="03729196CB20B6194A9B15CA1A67844C" bold="true" pageId="0" pageNumber="17">Figure 35.</emphasis>
<taxonomicName id="AEDE894485E6E2A80264EC929B58C715" authorityName="Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414" authorityYear="2016" class="Agaricomycetes" family="Hymenogastraceae" genus="Hebeloma" kingdom="Fungi" lsidName="Hebeloma islandicum" order="Ostropales" pageId="0" pageNumber="17" phylum="Basidiomycota" rank="species" species="islandicum">
<emphasis id="B649992A3993EACF0A6F65F9BA3EFA8B" italics="true" pageId="0" pageNumber="17">Hebeloma islandicum</emphasis>
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<emphasis id="E6F049EE70BD51590FD6A355B4C55639" bold="true" pageId="0" pageNumber="17">A</emphasis>
TB19.81, photograph T. Borgen
<emphasis id="B1973FB8CBCB96B46F80F47B1D44E51D" bold="true" pageId="0" pageNumber="17">B</emphasis>
distribution of cited collections;
<emphasis id="0FB53EA200267A9DE57036E209DFAA3E" bold="true" pageId="0" pageNumber="17">C</emphasis>
spores
<normalizedToken id="E498B3359D24870E4AA3EACD6EA73623" originalValue="×">x</normalizedToken>
1600 and
<emphasis id="039D5B33A340945B444E2A2B2CF6ACB7" bold="true" pageId="0" pageNumber="17">D</emphasis>
cheilocystidia
<normalizedToken id="C27B3B561D455436116E1D648D3C8278" originalValue="×">x</normalizedToken>
1000 of TB86.291 in
<normalizedToken id="48BCAA5010C1B5F8F84D70808FBFBE79" originalValue="Melzers">Melzer's</normalizedToken>
reagent. Scale bars: 5
<normalizedToken id="03C7722803305E09FABB5DBAD732A952" originalValue="µm">µm</normalizedToken>
; microphotographs H.K.J. Beker.
</paragraph>
</caption>
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<subSubSection id="8ED6C7A7A3C16C43FACC0FC50196BB33" pageId="0" pageNumber="17" type="description">
<paragraph id="482AEE6DA32D53191623AB8C1EA352C2" pageId="0" pageNumber="17">Microscopic description.</paragraph>
<paragraph id="A1C65829172B79FE1D0433E558117122" pageId="0" pageNumber="17">
Spores amygdaloid, often limoniform, papillate, on ave. 11.0-12.5
<normalizedToken id="E5374F0525EF157C6F93444C2441AB61" originalValue="×">x</normalizedToken>
6.5-7.0
<normalizedToken id="314FDC41BFAEC4A40580AE7DD07CE4EA" originalValue="µm">µm</normalizedToken>
, ave. Q = 1.7-1.8, yellow to yellow brown, guttulate, at most weakly ornamented ((O1) O2), perispore not or somewhat loosening (P0P1), weakly to rather strongly dextrinoid (D2D3). Basidia 28-40
<normalizedToken id="85CE78AD62224B764DA29CA734A4CEA6" originalValue="×">x</normalizedToken>
6-9
<normalizedToken id="B858C83182E23702F4BFABA2584F5982" originalValue="µm">µm</normalizedToken>
, ave. Q = 3.7-4.9, mostly four-spored. Cheilocystidia irregular, a mixture of clavate-stipitate, clavate-lageniform, ventricose and slenderly clavate, with occasional characters, geniculate, septate (sometimes clamped) or rostrate, on ave. 44-55
<normalizedToken id="11000A13E4D48BF3B5AA29789B5D1A10" originalValue="×">x</normalizedToken>
6.5-8.5 (apex)
<normalizedToken id="B3A54C91D7A6314701C7D0ADE5D25379" originalValue="×">x</normalizedToken>
4-5 (middle)
<normalizedToken id="E1363F95B339019956B6EF920F2DA4F4" originalValue="×">x</normalizedToken>
4-8 (base)
<normalizedToken id="181109AD1D022CBE3AAB36549A4EB414" originalValue="µm">µm</normalizedToken>
, ratios A/M = 1.63-1.98, A/B = 1.04-1.85, B/M = 1.05-1.73. Epicutis an ixocutis, up to 120
<normalizedToken id="010C0B9A95B65E83E2F143CD976F6D71" originalValue="µm">µm</normalizedToken>
thick (measured from exsiccata), maximum hyphae width 6
<normalizedToken id="84D5F00885E012D19A944E4579E05C76" originalValue="µm">µm</normalizedToken>
, some encrusted, trama elements beneath subcutis ellipsoid, cylindrical, thick sausage-shaped up to 20
<normalizedToken id="5BCABE5F80189A8E1948F2ABF36B2A65" originalValue="µm">µm</normalizedToken>
wide. Caulocystidia irregular like cheilocystidia up to 140
<normalizedToken id="E86AE8ACB80C97EE1CF349F373AC8BCF" originalValue="µm">µm</normalizedToken>
long.
</paragraph>
</subSubSection>
<subSubSection id="BCA7DE6A866B428CF2476A00F177DAD7" pageId="0" pageNumber="17" type="collections examined">
<paragraph id="4CDCF56AE58F4A1AB90BB05699555C7E" pageId="0" pageNumber="17">Collections examined.</paragraph>
<paragraph id="405C086890A866498625FA80A0D03647" pageId="0" pageNumber="17">
<emphasis id="9074FD839E0AA43B84FDDEF3E7CD2F87" bold="true" pageId="0" pageNumber="17">S-Greenland</emphasis>
: Paamiut, N of town,
<geoCoordinate id="D54B53046CD39E1CAE392E148CB2027B" degrees="62.01" direction="north" orientation="latitude" precision="555" value="62.01">62.01°N</geoCoordinate>
,
<geoCoordinate id="57A7C5A2FCC41E0A765B1837B3632E50" degrees="49.4" direction="west" orientation="longitude" precision="5555" value="-49.4">49.4°W</geoCoordinate>
, 5 Sep 1986, T. Borgen (TB86.291, C-F-103573), 10 m, with
<taxonomicName id="CB23B2FB4067BDE4C8D07C1384644AF7" class="Dicotyledoneae" family="Salicaceae" genus="Salix" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Salix herbacea" order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="species" species="herbacea">
<emphasis id="6F3E526B37DDAE8E68DE8185AACE9969" italics="true" pageId="0" pageNumber="17">Salix herbacea</emphasis>
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in snowbed.
</paragraph>
</subSubSection>
<subSubSection id="BA54E694A4BB21958A0A53707BAC955F" pageId="0" pageNumber="17" type="distribution">
<paragraph id="99ABEB9B7FFBF1290C06E67D0E2BE82D" pageId="0" pageNumber="17">Distribution.</paragraph>
<paragraph id="F40B014AC555047D8ACF74B1F7CBE5FF" pageId="0" pageNumber="17">
Only one record, from southern Greenland. Until recently only known from the type from the north-western, arctic part of Iceland. As discussed above, two more collections have been discovered from herbarium exsiccata at O; both, collected in Norway at above 60°N at altitudes of more than 1000 m (
<bibRefCitation id="1B77B98677061B012A169AAEC410BCBF" author="Eberhardt, U" journalOrPublisher="Plant Ecology and Evolution" pageId="0" pageNumber="17" refId="B15" refString="Eberhardt, U, Weholt, O, Pettersen, M, Schuetz, N, Beker, HJ, in press. Hebeloma of Norway. Agarica." title="Hebeloma of Norway. Agarica." year="in press">Eberhardt et al. in press</bibRefCitation>
). The above record from Greenland is from an arctic area and extends the distribution to North America. It is seemingly a very rare species. Although T.B. investigated the area around Paamiut regularly for 20 years, he only collected it once.
</paragraph>
</subSubSection>
<subSubSection id="B85484238921DB9647A84B188A267CAA" pageId="0" pageNumber="17" type="habitat">
<paragraph id="A356A2C28930C8588661B9ECCD135563" pageId="0" pageNumber="17">Habitat and ecology.</paragraph>
<paragraph id="B190CFD96C99B39DF597F8ED5B2B6919" pageId="0" pageNumber="17">
All four known collections appear to have been associated with
<taxonomicName id="1214DE4290850E965B0E88946FB7F63F" class="Dicotyledoneae" family="Salicaceae" genus="Salix" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Salix herbacea" order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="species" species="herbacea">
<emphasis id="74036E109DCA21BAE87F11DF73EC7217" italics="true" pageId="0" pageNumber="17">Salix herbacea</emphasis>
</taxonomicName>
in a wet snowbed.
</paragraph>
</subSubSection>
<subSubSection id="C9F48DA093440EFD1E1FD500588722AB" pageId="0" pageNumber="17" type="notes">
<paragraph id="70CBF4A1E16D0C6007AD725104CA428A" pageId="0" pageNumber="17">Notes.</paragraph>
<paragraph id="E7B361A1F49710100E56883EA35A8173" pageId="0" pageNumber="17">
<taxonomicName id="AE8DEC7935ABC9599683844C4FBB7635" authorityName="Beker &amp; U. Eberh.; Beker, Eberhardt &amp; Vesterholt, Fungi Europ. (Alassio) 14: 414" authorityYear="2016" class="Agaricomycetes" family="Hymenogastraceae" genus="Hebeloma" kingdom="Fungi" lsidName="Hebeloma islandicum" order="Ostropales" pageId="0" pageNumber="17" phylum="Basidiomycota" rank="species" species="islandicum">
<emphasis id="368668B33836B420FCFA7A90EE003075" italics="true" pageId="0" pageNumber="17">Hebeloma islandicum</emphasis>
</taxonomicName>
was the only species recorded during the course of this study, which was not belonging to
<taxonomicName id="992DF13A6B2F52B27D47E3FEBA32610D" class="Dicotyledoneae" family="Salicaceae" genus="H." higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="H." order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="genus">
<emphasis id="E19FF8046C7F3D0307EB1D384D02D440" italics="true" pageId="0" pageNumber="17">H.</emphasis>
</taxonomicName>
sects
<taxonomicName id="7BA55037FF185E5092FD23E51042BDCB" class="Magnoliopsida" family="Cactaceae" genus="Denudata" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Denudata" order="Caryophyllales" pageId="0" pageNumber="17" phylum="Tracheophyta" rank="genus">
<emphasis id="CAD4B6C0CF5C882FA7FB90C84A583995" italics="true" pageId="0" pageNumber="17">Denudata</emphasis>
</taxonomicName>
,
<taxonomicName id="66DC243E4A618F6909A43BFF33D69B5F" class="Agaricomycetes" family="Hymenogastraceae" genus="Hebeloma" kingdom="Fungi" lsidName="Hebeloma" order="Ostropales" pageId="0" pageNumber="17" phylum="Basidiomycota" rank="genus">
<emphasis id="CD8E399048342275C47D8FE50F230C4F" italics="true" pageId="0" pageNumber="17">Hebeloma</emphasis>
</taxonomicName>
or
<taxonomicName id="B97A864EAD6C888C2A850A4CDAC9326B" authorityName="Bruchet; Bull. Mens. Soc. Linn. Lyon 39 (6 (Suppl.)): 127" authorityYear="1970" class="Agaricomycetes" family="Hymenogastraceae" genus="Hebeloma" kingdom="Fungi" lsidName="" order="Ostropales" pageId="0" pageNumber="17" phylum="Basidiomycota" rank="section" section="Velutipes">
<emphasis id="DC9E2FD7CD059B20997B7C64D9631161" italics="true" pageId="0" pageNumber="17">Velutipes</emphasis>
</taxonomicName>
. This species was described in
<bibRefCitation id="A17D642353D3B97607D540AABC8EBDB3" author="Beker, HJ" journalOrPublisher="Fungi Europaei Edizioni Tecnografica, Lomazzo" pageId="0" pageNumber="17" refId="B4" refString="Beker, HJ, Eberhardt, U, Vesterholt, J, 2016. Hebeloma (Fr.) P. Kumm. Fungi Europaei Edizioni Tecnografica, Lomazzo" title="Hebeloma (Fr.) P. Kumm." year="2016">Beker et al. (2016)</bibRefCitation>
on the basis of a single, but distinctive, collection from Iceland. The authors placed it within
<taxonomicName id="92543FE4E46610EE1D22875B20909284" class="Dicotyledoneae" family="Salicaceae" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="H. subsp. sect." order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="section" section="Naviculospora">H. sect. Naviculospora</taxonomicName>
. However, the authors acknowledged that it did not sit comfortably within any of their accepted sections. Within this section, this is the only species known to associate with
<taxonomicName id="BEACD6041A6A90ED702AE5C0AD5A794A" class="Dicotyledoneae" family="Salicaceae" genus="Salix" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Salix" order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="genus">
<emphasis id="F1DEDDEF88A44801B1E0AA3639CDA056" italics="true" pageId="0" pageNumber="17">Salix</emphasis>
</taxonomicName>
. Since its publication, two further collections have been discovered in Norway (
<bibRefCitation id="0B4C73E3F0F6DB0EC305F022B4B8D2F0" author="Eberhardt, U" journalOrPublisher="Plant Ecology and Evolution" pageId="0" pageNumber="17" refId="B15" refString="Eberhardt, U, Weholt, O, Pettersen, M, Schuetz, N, Beker, HJ, in press. Hebeloma of Norway. Agarica." title="Hebeloma of Norway. Agarica." year="in press">Eberhardt et al. in press</bibRefCitation>
).
</paragraph>
<paragraph id="9ECD2CA9298B83A98D1B3BDB048F7C61" pageId="0" pageNumber="17">
Molecularly, this species is unambiguous. The ITS of the collection presented here is almost identical with the ITS of the type (693/694 pos. identical, all positions are matching (one G/T in the type sequence matched by a clean G). Most similar, but always less than 98% similar, are
<taxonomicName id="FB72A1259A8898629D7ACD38B2504FE6" class="Dicotyledoneae" family="Salicaceae" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="H. naviculosporum" order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="species" species="naviculosporum">
<emphasis id="517DCFA402E89DE7BC5A47FAF8836683" italics="true" pageId="0" pageNumber="17">H. naviculosporum</emphasis>
</taxonomicName>
and
<taxonomicName id="FABD40B0D7E53BE1E60F3CC93CE1F1D9" class="Dicotyledoneae" family="Salicaceae" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="H. nanum" order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="species" species="nanum">
<emphasis id="ADB5480AC588418F753162BC16252F00" italics="true" pageId="0" pageNumber="17">H. nanum</emphasis>
</taxonomicName>
(both
<taxonomicName id="FC1822B0C6F9920C9CD82791C07EE2CF" class="Dicotyledoneae" family="Salicaceae" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="H. subsp. sect." order="Salicales" pageId="0" pageNumber="17" phylum="Angiospermae" rank="section" section="Naviculospora">H. sect. Naviculospora</taxonomicName>
).
</paragraph>
</subSubSection>
</treatment>
</subSection>
</document>