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<document id="7401E4BFCA985700D365544375D6BF63" ID-DOI="10.3897/mycokeys.112.138580" ID-publisher-id="138580" URI-arpha="C0D7736B-9B35-5B1E-A494-8A4E0359DBE7" XM.bibliography_approvedBy="admin" XM.materialsCitations_approvedBy="admin" XM.taxonomicNames_approvedBy="admin" article-type="research-article" checkinTime="1737037779194" checkinUser="pensoft" docAuthor="Knudsen, Kerry, Cho-Ah-Ying, Jessica, Kocourková, Jana, Hodková, Eva, Malíček, Jiří &amp; Wang, Yan" docDate="2025" docId="CCD32E78A3B658F7A0B5E1EE12CA072B" docLanguage="en" docName="MycoKeys 112: 183-210" docOrigin="MycoKeys 112" docSource="https://mycokeys.pensoft.net/article/138580/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.mycokeys" docStyleName="PensoftTaxPub.0000.journal_article.mycokeys" docTitle="Acarospora tejonensis K. Knudsen &amp; Kocourk. 2025, sp. nov." docType="treatment" docVersion="2" dtd-version="3.0" lastPageNumber="210" masterDocId="C0D7736B9B355B1EA4948A4E0359DBE7" masterDocTitle="The diversity of Acarosporaceae (Acarosporales, Lecanoromycetes) in California" masterLastPageNumber="210" masterPageNumber="183" pageNumber="183" updateTime="1737047936984" updateUser="admin">
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<mods:titleInfo id="3D7F8E25711831223BE33D3B1B3B6D55">
<mods:title id="5B5580A345BCDDAF8644009F0FAC8857">The diversity of Acarosporaceae (Acarosporales, Lecanoromycetes) in California</mods:title>
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<mods:namePart id="23824379712C4BE31160D88CB45C4747">Knudsen, Kerry</mods:namePart>
<mods:nameIdentifier id="9544841BDCAC5FB5BBF85A54E60D5171" type="ORCID">0000-0001-5419-5729</mods:nameIdentifier>
<mods:affiliation id="A79063296DB00838C0920440D4C69868">Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic</mods:affiliation>
</mods:name>
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</mods:role>
<mods:namePart id="9FA1B91185C0DF10040EDCABDF88B512">Cho-Ah-Ying, Jessica</mods:namePart>
<mods:nameIdentifier id="695A90101EC09F1B537442BBDF0B1386" type="ORCID">https://orcid.org/0009-0001-4975-9355</mods:nameIdentifier>
<mods:affiliation id="E83DA0DF45EE95F639CDE900C922F98E">Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada</mods:affiliation>
</mods:name>
<mods:name id="96DDB8D057F5F912E72DC55290D0F764" type="personal">
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</mods:role>
<mods:namePart id="A7D3D67B6C7B7AD9A2FF26412D420632">Kocourková, Jana</mods:namePart>
<mods:nameIdentifier id="26C3D869EAA5AD78CFF1D6FAD8A54C29" type="ORCID">0000-0001-5511-9752</mods:nameIdentifier>
<mods:affiliation id="E23E48D178E02EF400D6A523C2D8C1B9">Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic</mods:affiliation>
</mods:name>
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<mods:namePart id="23295E96D35B90A4C313FAF4C5E87D3E">Hodková, Eva</mods:namePart>
<mods:nameIdentifier id="A3B0E824F656BECEA8A9E5DEF379D2E2" type="ORCID">0000-0002-8337-3253</mods:nameIdentifier>
<mods:affiliation id="753A29F578AF868F4C78CC5FAE46C8D4">Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic</mods:affiliation>
</mods:name>
<mods:name id="EAC0DED55687CE8BFE42C3CEC84ACB3D" type="personal">
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<mods:namePart id="4304C44C0A977595EC128987B859E6DF">Malíček, Jiří</mods:namePart>
<mods:nameIdentifier id="CE6EF62C02D905C910894F200151505E" type="ORCID">0000-0002-3119-8967</mods:nameIdentifier>
<mods:affiliation id="3890D70A6410C67795E4E9EE5EE44322">Institute of Botany, The Czech Academy of Sciences, Zámek 1, CZK 252 43 Průhonice, Czech Republic</mods:affiliation>
</mods:name>
<mods:name id="C7CFF6D04B4002C5C89600DEBF75FAC9" type="personal">
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<mods:namePart id="939FF62E42CFE818883FCF2761A97E13">Wang, Yan</mods:namePart>
<mods:nameIdentifier id="01B57042A29EBC411FF38EDD0264179B" type="ORCID">0000-0002-5950-8904</mods:nameIdentifier>
<mods:affiliation id="862F4C94E5A43BFA9B5A09F1FEE20CFE">Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada &amp; Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON, Canada</mods:affiliation>
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<mods:typeOfResource id="816CB86A5F986BE52257041A0E5D23AA">text</mods:typeOfResource>
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<mods:title id="3C7F661F57B70191DE11E60425914BF2">MycoKeys</mods:title>
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<mods:part id="2162B07618E56A6F691B08DBC7E5F502">
<mods:date id="7654FFDEC8CCE66DFDE8A92B88813718">2025</mods:date>
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<mods:number id="2635EE920A69FCD0E24E8504ABA48804">2025-01-16</mods:number>
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<mods:number id="73C5941B624CB34C0716744662A811DE">112</mods:number>
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<mods:start id="8F285E203F0CC5DA6D5A820DF439A224">183</mods:start>
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<mods:classification id="826BEDAE1261ACE1F3A8EB1116B89FD3">journal article</mods:classification>
<mods:identifier id="7C6EAFEC16A9BE561318A3824E68EEE5" type="DOI">10.3897/mycokeys.112.138580</mods:identifier>
</mods:mods>
<treatment id="CCD32E78A3B658F7A0B5E1EE12CA072B" ID-arpha="CCD32E78-A3B6-58F7-A0B5-E1EE12CA072B" ID-mycobank="MB853902" LSID="urn:lsid:plazi:treatment:CCD32E78A3B658F7A0B5E1EE12CA072B" httpUri="http://treatment.plazi.org/id/CCD32E78A3B658F7A0B5E1EE12CA072B" scope_class="Lecanoromycetes" scope_family="Acarosporaceae" scope_order="Acarosporales">
<subSubSection id="A60CC3E9A40B6F747C81B0A74B1D371A" type="nomenclature">
<paragraph id="C2497CBCDD171D85646EC480333FC6D9">
<taxonomicName id="5AE8D240337B082A79041BCB59B87EBA" authority="K. Knudsen &amp; Kocourk." authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis" status="sp. nov.">
<emphasis id="6478717F462F0C92D87192F7C6BE039B" italics="true">Acarospora tejonensis</emphasis>
K. Knudsen &amp; Kocourk.
</taxonomicName>
<taxonomicNameLabel id="75739CDA4B5EB03933CDF23BC01E4A7D" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="07BB0A6C8CA6449D9A064C23EE12571D" type="description">
<paragraph id="DE86A446BCBEC4F30152F908C1BBB937">
<figureCitation id="9EA8101865F52DC5DD37954D3C304EA1" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Acarospora tejonensis Knudsen 18838 Holotype (A C, F, H), Knudsen 18838 Isotype (D, E, G) A habit of the thallus with prolongated marginal areoles B vertical section through apothecium and margin of areole C variability of the thallus, black areoles with immersed apothecia sometimes reduced to a prominent margin D vertical section through apothecium showing parathecium with narrow hyphae E thallus of areoles lining crevices F young asci showing tholus G paraphyses slightly widened at tips, terminal cells orange-brown H ascospores. Scale bars: 1 mm (A, C, E); 100 µm (B); 20 µm (D, G); 50 µm (F); 5 µm (H)." figureDoi="10.3897/mycokeys.112.138580.figure5" httpUri="https://binary.pensoft.net/fig/1221231">Fig. 5</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EREBG" type="material">
<paragraph id="5DA4A7D75553E04972E6B6D0E3FA8F3F">
<heading id="659B302C194A279F0FD4AB8478F77CA7" reason="title">Type.</heading>
</paragraph>
<paragraph id="DFACDBA31E7AE77F71DFC3913EB892A4">
<materialsCitation id="258B0F75F12D3883B13D57F250873898" collectedFrom="fir and oak forest, on granite" collectingDate="2016-04-19" collectorName="K. Knudsen" country="United States of America" county="Kern Co." elevation="1738" latitude="34.9352" location="Martinez Ridge" longLatPrecision="6" longitude="-118.6477" municipality="Tehachapi Mountains" specimenCount="1" typeStatus="isotype">
<collectingCountry id="CCB29F7687FA521914F71AD43C9406D3" name="United States of America">U. S. A.</collectingCountry>
<collectingCounty id="BC6E8F26EF458C513D8416757C15966C">Kern Co.</collectingCounty>
,
<collectingMunicipality id="AD3FB2588941E945707FA9DBA8FF8763">Tehachapi Mountains</collectingMunicipality>
,
<collectingMunicipality id="EF60488E9BA929588C96C9AE418A95AD">Tejon Ranch</collectingMunicipality>
,
<location id="7782375AE21945D538CE869423310F07" LSID="urn:lsid:plazi:treatment:CCD32E78A3B658F7A0B5E1EE12CA072B:7782375AE21945D538CE869423310F07" country="United States of America" county="Kern Co." latitude="34.9352" longLatPrecision="6" longitude="-118.6477" municipality="Tehachapi Mountains" name="Martinez Ridge">Martinez Ridge</location>
,
<collectedFrom id="9EF6C5B4D932C33CF766AE03C1672668">fir and oak forest</collectedFrom>
,
<named-content content-type="dwc:verbatimCoordinates" id="NCID0E1EBG" specific-use="{&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[-118.647700,34.935200]}">
<geoCoordinate id="8A4029BB22F34ED8993C40D5FED4D54D" degrees="34.9352" direction="north" orientation="latitude" precision="5" value="34.9352">34.9352</geoCoordinate>
,
<geoCoordinate id="6E926CF49527D93BABCDF52F96E8B8A7" degrees="118.6477" direction="west" orientation="longitude" precision="5" value="-118.6477">- 118.6477</geoCoordinate>
</named-content>
, alt.
<quantity id="80C103B14C6B67A3F76E9327E24D2055" metricMagnitude="3" metricUnit="m" metricValue="1.738" unit="m" value="1738.0">
<elevation id="8D5FF2734D338204FE9CF926B34F1798" metricMagnitude="3" metricUnit="m" metricValue="1.738" unit="m" value="1738.0">1738 m</elevation>
</quantity>
,
<collectedFrom id="9DF1314A1FF1B2A7E64ACD2A2F576611">on granite</collectedFrom>
,
<date id="8B7594DBEB5DCB22D2965F9115C452BA" value="2016-04-19">
<collectingDate id="F30748C83AD48B670153E5844F37CE7A" value="2016-04-19">19 April 2016</collectingDate>
</date>
,
<collectorName id="A244BFAFA3D5078C095B10810C91B76F">K. Knudsen</collectorName>
18838 (SBBG-holotype,
<typeStatus id="DA6DB502B0D46AEF5B9EC0308374E1FB" type="isotype">isotypes</typeStatus>
)
</materialsCitation>
.
</paragraph>
<caption id="5CFC91976337BE68004B09C1737EBA4F" ID-DOI="10.3897/mycokeys.112.138580.figure5" ID-arpha="877700D8-4AA5-5534-A998-2CF49FF7A6AA" httpUri="https://binary.pensoft.net/fig/1221231" startId="F5">
<paragraph id="FE5EF077077DDF85178328FCB606225A">
<label id="5BDF09B3200D16C73B31D4A610B33E88">Figure 5.</label>
</paragraph>
<paragraph id="6BCFF9E9AB568CE0AA07F364A571601E">
<taxonomicName id="58751F4E265BC09861A5FDBDC3A8E299" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="2F751068F121881422ECEB1BBE871AC5" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
Knudsen 18838 Holotype (
<emphasis id="1DA719B4F41EEFB20C6CEF07A1C4F715" bold="true">A C, F, H</emphasis>
), Knudsen 18838 Isotype (
<emphasis id="1FF76250AE8199EF7A23A1D77B3AE749" bold="true">D, E, G</emphasis>
)
<emphasis id="93354C48ED861DF11A03F30E2AF5EB05" bold="true">A</emphasis>
habit of the thallus with prolongated marginal areoles
<emphasis id="6B2806D8B12238701F9ACAA4AC809BC6" bold="true">B</emphasis>
vertical section through apothecium and margin of areole
<emphasis id="633805FA6CA40F372FDBCA4862D2BFBE" bold="true">C</emphasis>
variability of the thallus, black areoles with immersed apothecia sometimes reduced to a prominent margin
<emphasis id="F8A6580CC0812CDA8DF3ABACDD23020D" bold="true">D</emphasis>
vertical section through apothecium showing parathecium with narrow hyphae
<emphasis id="882E42DBF7FECD7235B3471D42827056" bold="true">E</emphasis>
thallus of areoles lining crevices
<emphasis id="B32A92A3B6218403AC959B26F9DBDD5E" bold="true">F</emphasis>
young asci showing tholus
<emphasis id="198EDA724BDF60C1C2D1BF24B4ADCFD1" bold="true">G</emphasis>
paraphyses slightly widened at tips, terminal cells orange-brown
<emphasis id="26E8D4A73AADC5546367A97F64D062FD" bold="true">H</emphasis>
ascospores. Scale bars: 1 mm (
<emphasis id="1807ED03AA60D719F035807FC072E357" bold="true">A, C, E</emphasis>
); 100 µm (
<emphasis id="1CDE97D77A66D37E102680724766AA02" bold="true">B</emphasis>
); 20 µm (
<emphasis id="A23D122FCD3F1C35B21F1EBE38882850" bold="true">D, G</emphasis>
); 50 µm (
<emphasis id="7EDA53E5FA87D1143978C728D441CDD3" bold="true">F</emphasis>
); 5 µm (
<emphasis id="003D7358AF51E2032B807D5159606342" bold="true">H</emphasis>
).
</paragraph>
</caption>
</subSubSection>
<subSubSection id="SECID0EVGBG" type="diagnosis">
<paragraph id="901A0E589FC11AE4EE38A5A1527B38B7">
<heading id="483EE690CBAB76B02DD533E782ECC0A6" reason="title">Diagnosis.</heading>
</paragraph>
<paragraph id="3C829A4040E0A6B779624850A6B450FA">
Similar to
<taxonomicName id="3F57496D4D9573D18BF2951F9665F9E6" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="veronensis">
<emphasis id="5A851DAE63BB642DEA8F137C54A20A03" italics="true">A. veronensis</emphasis>
</taxonomicName>
but with a thicker cortex, 3050 ( 70) vs. 1530 µm and a usually higher hymenium (100 ) 120 ( 150) vs. 8090 ( 100) µm.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EGHBG" type="etymology">
<paragraph id="110ACC5C3A123495A5234B1E0944FA00">
<heading id="1734C257FA3628AD54D51E84FF63D1D5" reason="title">Etymology.</heading>
</paragraph>
<paragraph id="074E264FFE677F65F311F740D92B9F9A">Named after the type locality in Tejon Ranch in Tehachapi Mountains.</paragraph>
</subSubSection>
<subSubSection id="SECID0ELHBG" type="description">
<paragraph id="C78CEBDC69532E6BAAA8782CD5D5099B">
<heading id="1CCEA4F9E33A18E77DD142BAFCF05366" reason="title">Description.</heading>
</paragraph>
<paragraph id="7972B486B77DBF85666C51EA0CC89B93">
Hypothallus endosubstratal, no algae observed. Thallus areolate, areoles
<quantity id="3EBE8C52C4DD3D162621B6F31AF860D0" metricMagnitude="-4" metricUnit="m" metricValue="6.5" metricValueMax="11.0" metricValueMin="2.0" unit="mm" value="0.65" valueMax="1.1" valueMin="0.2">0.21.1 mm</quantity>
wide, 150270 µm thick, angular, contiguous to dispersed, marginal areoles can be prolongated and lobate, becoming elevated by a mycelial base, replicating by division, covering areas up to
<quantity id="66CE92AB53EB6A9F44FD5E829791D72A" metricMagnitude="-2" metricUnit="m" metricValue="4.0" unit="cm" value="4.0">4 cm</quantity>
or more. Upper surface light to dark brown, sometimes partly black, epruinose, rugulose to smooth. Lower surface white. Epicortex lacking. Cortex 3050 ( 70) µm thick, upper layer dark brown, 1030 µm thick, lower layer hyaline, hyphae usually disarticulated, cells round to irregular, mostly small, 13 µm wide, rarely up to 5 µm wide. Algal layer up to 100 µm thick, uninterrupted, algal cells 812 µm wide, continuous below apothecia. Medulla white,
<quantity id="A4FA0646F706AC6DD5E069BEB8156D78" metricMagnitude="-4" metricUnit="m" metricValue="4.5" metricValueMax="7.0" metricValueMin="2.0" unit="mm" value="0.44999999999999996" valueMax="0.7" valueMin="0.2">0.20.7 mm</quantity>
thick, hyphae obscure in water, intricate and gelatinized, mostly 1 µm wide. Apothecia immersed, usually one per areole, sometimes 25, sometimes with areole reduced to a prominent margin, the disc dark, epruinose, same color as thallus,
<quantity id="9E92BDD69728CEF699E82FE0DA34CF45" metricMagnitude="-4" metricUnit="m" metricValue="2.0" metricValueMax="3.0" metricValueMin="1.0" unit="mm" value="0.2" valueMax="0.3" valueMin="0.1">0.10.3 mm</quantity>
wide, rarely to
<quantity id="878D4A84D258798769D6645D1E452E35" metricMagnitude="-4" metricUnit="m" metricValue="5.0" unit="mm" value="0.5">0.5 mm</quantity>
wide. Parathecium indistinct to 20 µm wide of narrow hyphae 1 µm wide, merging with the cortex. Hymenium cupular, (100 ) 120 ( 150) µm tall, epihymenium dark reddish brown, 10 µm tall, paraphyses 12 µm wide, apices unexpanded or slightly widened in terminal reddish brown gel cap, hymenial gel IKI + reddish orange, hemiamyloid. Asci 90120 × 1020 µm, cylindrical to clavate, ascospore several hundred per asci, small, thin ellipsoid, 34 × 1 µm (n = 20). Subhymenium 2040 µm tall, IKI + blue. Hypothecium indistinct to 10 µm thick. Pycnidia not observed. Chemistry: not producing secondary metabolites.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EQHBG" type="habitat">
<paragraph id="9F71AA5FB1146ED82548180FA7F08A41">
<heading id="EC2CA8B31C3CF8E12D7ADA30B4F32964" reason="title">Habitat and distribution.</heading>
</paragraph>
<paragraph id="CFDB25C9EA810F767812271AC63EBDE1">
<collectingCountry id="F3F20CD62334A431D2B3E86DBE49B0D8" name="United States of America">U. S. A.</collectingCountry>
,
<collectingRegion id="CBB8C4A1A56A610746A1B38620363D52" country="United States of America" name="California">California</collectingRegion>
. on Santa Rosa Island (Channel Island National Park), in Carrizo Plain National Monument, and in the Tehachapi Mountains, from
<quantity id="2A7CBD2752FFA2151FADFB9A3FAB0801" metricMagnitude="2" metricUnit="m" metricValue="9.68" metricValueMax="17.38" metricValueMin="1.98" unit="m" value="968.0" valueMax="1738.0" valueMin="198.0">1981738 m</quantity>
, on sandstone and siliceous rock in full sun.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EVHBG" type="material">
<paragraph id="4B77BB9048570D4584F7A73A249014BB">
<heading id="3B17D68DFE8C2C347C9E28BCA84F7A83" reason="title">Selected specimens examined.</heading>
</paragraph>
<paragraph id="36D4F37200088926921725C7242E17D0">
<materialsCitation id="60E9AA940026DE0226854D4298799A47" collectedFrom="on sandstone growing with A. socialis" collectingDate="2009-06-14" collectionCode="SBBG" collectorName="K. Knudsen" country="United States of America" county="Santa Barbara Co." elevation="183" latitude="33.895" location="South Point" longLatPrecision="6" longitude="-120.1159" municipality="Santa Rosa Island" specimenCount="1" stateProvince="California">
<collectingCountry id="169DDEF771536D4711A111A80EEA8467" name="United States of America">U. S. A.</collectingCountry>
<collectingRegion id="E956B72C99BA64CA8C89603B85E05037" country="United States of America" name="California">California</collectingRegion>
,
<collectingCounty id="6F3870EF66DF1AAD07E3050C986B859E">Santa Barbara Co.</collectingCounty>
,
<collectingMunicipality id="8D6D372B69A0CE91822E71A4FD62EE42">Santa Rosa Island</collectingMunicipality>
,
<location id="CBC9C65FD6310009865720F0B6C35212" LSID="urn:lsid:plazi:treatment:CCD32E78A3B658F7A0B5E1EE12CA072B:CBC9C65FD6310009865720F0B6C35212" country="United States of America" county="Santa Barbara Co." latitude="33.895" longLatPrecision="6" longitude="-120.1159" municipality="Santa Rosa Island" name="South Point" stateProvince="California">South Point</location>
,
<named-content content-type="dwc:verbatimCoordinates" id="NCID0E5HBG" specific-use="{&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[-120.115900,33.895000]}">
<geoCoordinate id="FDB18363A20D8A200170A67ACC4BFBEF" degrees="33.8950" direction="north" orientation="latitude" precision="5" value="33.895">33.8950</geoCoordinate>
,
<geoCoordinate id="BCD4A50FA20CD508221168F8AED1F9F1" degrees="120.1159" direction="west" orientation="longitude" precision="5" value="-120.1159">- 120.1159</geoCoordinate>
</named-content>
, alt.
<quantity id="8C749715DD5C7B2974C5F15392AB0569" metricMagnitude="2" metricUnit="m" metricValue="1.83" unit="m" value="183.0">
<elevation id="73BEEFB144A2A0C0E7720D730E2A6CE9" metricMagnitude="2" metricUnit="m" metricValue="1.83" unit="m" value="183.0">183 m</elevation>
</quantity>
,
<collectedFrom id="74A8336CD2795520FA976D9E1AE33A7A">
on sandstone growing with
<taxonomicName id="1D4CBA5C5DED4BFE968BDF30DC9E8703" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="socialis">
<emphasis id="1B50CF99CAD41FE027BAFC44269ADA94" italics="true">A. socialis</emphasis>
</taxonomicName>
</collectedFrom>
,
<date id="54D70C84D4AD03EE000F303F9832E192" value="2009-06-14">
<collectingDate id="CEC44C34A4B1DB91B553E6EC2EF050B0" value="2009-06-14">14 June 2009</collectingDate>
</date>
,
<collectorName id="71722B51EDA099BC655CAB4D82C93820">K. Knudsen</collectorName>
11422 (
<collectionCode id="6C356A8443D250124C9BFD07BCBEA918" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15722" lsid="urn:lsid:biocol.org:col:15722" name="Santa Barbara Botanic Garden" type="Herbarium">SBBG</collectionCode>
)
</materialsCitation>
; •
<materialsCitation id="B94D178842745D7799522A5304F24B32" collectedFrom="north-facing slope, on siliceous rock" collectingDate="2016-03-28" collectionCode="SBBG" collectorName="R. Rosentreter" country="United States of America" county="San Luis Obispo Co." elevation="838" latitude="35.2074" location="but near road, Elkhorn Hill" longLatPrecision="6" longitude="-119.7026" municipality="Carrizo Plain National Monument" specimenCount="1">
<collectingCounty id="2600C074E03ADA38CA57453094F0F0BA">San Luis Obispo Co.</collectingCounty>
,
<collectingMunicipality id="2D71184DA5E8B70C245C1806BFBA8DEE">Carrizo Plain National Monument</collectingMunicipality>
,
<collectingMunicipality id="0DC77E6ADBA7FFCF85E3CA1A6A864B67">canyon south of Hurricane Road</collectingMunicipality>
,
<location id="4F2149A691D2EDFEA68906C88B469D49" LSID="urn:lsid:plazi:treatment:CCD32E78A3B658F7A0B5E1EE12CA072B:4F2149A691D2EDFEA68906C88B469D49" country="United States of America" county="San Luis Obispo Co." latitude="35.2074" longLatPrecision="6" longitude="-119.7026" municipality="Carrizo Plain National Monument" name="but near road, Elkhorn Hill">but near road, Elkhorn Hill</location>
,
<collectedFrom id="311FA4C30E0688185FBA854BD384C713">north-facing slope</collectedFrom>
,
<named-content content-type="dwc:verbatimCoordinates" id="NCID0ERIBG" specific-use="{&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[-119.702600,35.207400]}">
<geoCoordinate id="5B923DF16A03B09979E3CF9AA7D2D30F" degrees="35.2074" direction="north" orientation="latitude" precision="5" value="35.2074">35.2074</geoCoordinate>
,
<geoCoordinate id="78C1ADA69ED50E69C41F61AA33739678" degrees="119.7026" direction="west" orientation="longitude" precision="5" value="-119.7026">- 119.7026</geoCoordinate>
</named-content>
,
<quantity id="58A3F6AF7EFDC4FC0DEAA70AC2138D92" metricMagnitude="2" metricUnit="m" metricValue="8.379999999999999" unit="m" value="838.0">
<elevation id="562697A79807FCBC75D6D51C695E91FA" metricMagnitude="2" metricUnit="m" metricValue="8.379999999999999" unit="m" value="838.0">838 m</elevation>
</quantity>
,
<collectedFrom id="574B5867B8B4AD3353C4FC5A33F2EBDD">on siliceous rock</collectedFrom>
,
<date id="C937C46B1D0E653066B7A83FD4E69CEB" value="2016-03-28">
<collectingDate id="9167B8329D0C768626AA757AE00A908D" value="2016-03-28">28 March 2016</collectingDate>
</date>
,
<collectorName id="05D4DAD5BD5B4E59D78B9260D0ABD47F">R. Rosentreter</collectorName>
19464 (
<collectionCode id="1A38FDA2165B28F2ECB6103538750EC7" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15722" lsid="urn:lsid:biocol.org:col:15722" name="Santa Barbara Botanic Garden" type="Herbarium">SBBG</collectionCode>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EWIBG" type="notes">
<paragraph id="2215A59549C932D2302E1DA1A558DF89">
<heading id="0D6E5ABA308BDD5806C0F7A878CECE90" reason="title">Notes.</heading>
</paragraph>
<paragraph id="292E04C1B6476E848D20C2DC3403FE98">
In our key to southwestern North America
<taxonomicName id="C14C08CA82DED0770C912006947FDB1C" authority="(Knudsen et al. 2023 a)" baseAuthorityName="Knudsen" baseAuthorityYear="2023" class="Lecanoromycetes" family="Acarosporaceae" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="family">
Acarosporaceae (
<bibRefCitation id="46A55B8EFDB9D69EEA4B099897D1E076" DOI="10.3398/064.083.0105" author="Knudsen K &amp; Kocourková J &amp; Hodková E &amp; Malíček J &amp; Wang Y" issue="1" journalOrPublisher="Western North American Naturalist" pagination="51-88" refId="B33" refString="Knudsen K, Kocourková J, Hodková E, Malíček J, Wang Y (2023 a) Acarosporaceae of New Mexico: Eight new species of Acarospora and Sarcogyne. Western North American Naturalist 83 (1): 5188. https://doi.org/10.3398/064.083.0105" title="Acarosporaceae of New Mexico: Eight new species of Acarospora and Sarcogyne." volume="83">Knudsen et al. 2023 a</bibRefCitation>
)
</taxonomicName>
<taxonomicName id="9FADCBD5A4BF7398096C28B49C2A4FF7" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="0E69EF70C17D1BA26E0433EF2F4A4EC3" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
is recovered in Section 8 couplet 12, areoles with an average hymenium height of 120 μm in couplet 13 with
<taxonomicName id="B04223354F324EFBC2488F58C84758AF" class="Lecanoromycetes" family="Acarosporaceae" genus="Myriospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="hassei">
<emphasis id="59FF579BE5AADAD4EADA75043356C1D6" italics="true">Myriospora hassei</emphasis>
</taxonomicName>
and
<taxonomicName id="0014FBC8BC86B3A220A72E8E2881662E" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="worthingtoniana">
<emphasis id="5693BDF10665329F1E4E5E6861A4FE62" italics="true">Acarospora worthingtoniana</emphasis>
</taxonomicName>
.
<taxonomicName id="4832670BBCF1040726EBE34317192EB8" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="E58B3AF00291EC025B782472661EE7DE" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
differs from
<taxonomicName id="6C202E8C918E8088ED9FEB897737D339" class="Lecanoromycetes" family="Acarosporaceae" genus="Myriospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="hassei">
<emphasis id="138CED9D9130CB69190170C9B37532A3" italics="true">M. hassei</emphasis>
</taxonomicName>
in not having an interrupted algal layer or a hymenium up to 200 μm high. It differs from
<taxonomicName id="A93716F8B25B8BD015068BB3BC363D41" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="worthingtoniana">
<emphasis id="4D95C1B47F4C91BDA8F6F9C4FA48486A" italics="true">A. worthingtoniana</emphasis>
</taxonomicName>
in having a thicker cortex [3050 ( 70) vs. ca. 20 μm], a narrower parathecium indistinct to 20 μm vs. 40100 μm wide, and in not having abundant apothecia in each areole.
</paragraph>
<paragraph id="0F9CE0C4AAD1BC2D4CB05D563B604A74">
Because
<taxonomicName id="AB6130B802FEF13A29AD051B6B9853B4" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="084384C6BCE06D462C9434D0A764CADD" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
usually has one apothecium per small areole without producing secondary metabolites, it belongs to the morphological
<taxonomicName id="ABE0991FD32B7691629645DE42B2A26F" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="veronensis">
<emphasis id="507A4D75551B2BC6B00CCEC0C13D0861" italics="true">A. veronensis</emphasis>
</taxonomicName>
group. It may be in
<collectingRegion id="F4864F5EB85C034121DD7EE774A2FF67" country="United States of America" name="California">California</collectingRegion>
collections misidentified as
<taxonomicName id="55C77B9B4725E268A7C6C284645BD1E7" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="veronensis">
<emphasis id="6A10D9D5465B3867013EAF51255B3500" italics="true">A. veronensis</emphasis>
</taxonomicName>
if the hymenium and cortex is not measured or as
<taxonomicName id="C7A39FD2B33E375582DE899BEEAE5151" baseAuthorityName="Knudsen" baseAuthorityYear="2021" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="americana">
<emphasis id="94F0B9A03AC2AF0C6B85B515AD99B7DB" italics="true">A. americana</emphasis>
</taxonomicName>
if the parathecium is not measured.
<taxonomicName id="D84BC824DDBF3990C240E33A9A28BD1F" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="6C7C69C69332FB1CCFDFE7D8A580705E" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
differs from
<taxonomicName id="056670ECB9AF163F5D10239F6E0CBB87" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="veronensis">
<emphasis id="7C207C0E5431FB0AEAC74C2F594B4C19" italics="true">A. veronensis</emphasis>
</taxonomicName>
especially in the having a higher hymenium (100150 vs. 60100 µm) and thicker cortex [3050 ( 70) vs. 1530 μm].
<taxonomicName id="D86A90B13DD74B7828A92B713B0D2463" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="A62B759E7A1D59D22288DD39F29DF42C" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
differs from
<taxonomicName id="379B27D429610ABA9C6F9EA302D31E0C" baseAuthorityName="Knudsen" baseAuthorityYear="2021" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="americana">
<emphasis id="5BE92EFBFE61865EFE0B7F2D6A7F6C7B" italics="true">A. americana</emphasis>
</taxonomicName>
in having a narrower parathecium (
<bibRefCitation id="782A9EB76F8D50E0A364777C400FF397" author="Knudsen" firstAuthor="Knudsen" refId="B14" refString="Knudsen K (2021) Taxon profile of Acarospora americana. Consortium of North American Lichen Herbaria. Taxon Search. https://lichenportal.org" url="https://lichenportal.org" year="2021">Knudsen 2021</bibRefCitation>
). The two species are sympatric in
<collectingRegion id="4A5332E260709A03F98426A21C60C67A" country="United States of America" name="California">California</collectingRegion>
.
<taxonomicName id="472BE1FD84F847E383879496D96AED80" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tenebrica">
<emphasis id="F8EE41D06A6EC9B69A352A2AD519A722" italics="true">Acarospora tenebrica</emphasis>
</taxonomicName>
has similar anatomical measurement as
<taxonomicName id="F4B89ADFCE42ADE86AB689DBDE2A88AF" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="2C3DE38DE01FF2F84DE73283CE16D3CD" italics="true">A. tejonensis</emphasis>
</taxonomicName>
except apices of the parathecial hypae widen up to 3 μm.
<taxonomicName id="820B0FED84C96010DADBA971987D527A" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tenebrica">
<emphasis id="CB8F974EFE84D870B5128823A7FE7145" italics="true">Acarospora tenebrica</emphasis>
</taxonomicName>
occurs in southwestern
<collectingRegion id="565BFCC13D6A41460FD5409EFA26FFB0" country="United States of America" name="Texas">Texas</collectingRegion>
and
<collectingRegion id="B47C4BCF318A30AFD4D9F848A4D3C84D" country="United States of America" name="New Mexico">New Mexico</collectingRegion>
while
<taxonomicName id="61B4185E807E39B0F20D2F615D9ED183" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="EE3A3F365EE365508E5E73086DD0A7AC" italics="true">A. tejonensis</emphasis>
</taxonomicName>
is known only from central
<collectingRegion id="1DF87CA16394C3ED8E5C655216B9DA53" country="United States of America" name="California">California</collectingRegion>
.
<bibRefCitation id="C6A8C8549DFDCEA06D13AC6FD4414AA9" author="Magnusson AH" firstAuthor="Magnusson" journalOrPublisher="B" pagination="1-34" refId="B48" refString="Magnusson AH (1956) A second supplement to the monograph of Acarospora with keys. Goteborgs Kungl. Vetensk. and Vitterhets-Samhalles Handl., sjatte foljden ser. B 6: 134." title="A second supplement to the monograph of Acarospora with keys. Goteborgs Kungl. Vetensk. and Vitterhets-Samhalles Handl., sjatte foljden ser." volume="6" year="1956">Magnusson (1956)</bibRefCitation>
reported the North African species
<taxonomicName id="119C4C3EB3571270F9B7DF9A6B3AEAB5" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="C9EB2603A55301591B78CBF1F6539660" italics="true">Acarospora obscura</emphasis>
</taxonomicName>
as occurring in
<collectingRegion id="65F313BB88D35AEB69DADFF3FD7480AB" country="United States of America" name="California">California</collectingRegion>
. “ Whether the identity between the American and the African specimens is complete is not easy to state owing to the smallness of areoles ” (
<bibRefCitation id="57494366B60433DCE156D534D2E0E011" author="Magnusson" firstAuthor="Magnusson" refId="B40" refString="Magnusson AH (1929) A monograph of the genus Acarospora. Kungliga Svenska Vetenskaps-akademiens Hand lingar, ser. 3, 7: 1400." year="1929">Magnusson 1929</bibRefCitation>
). We examined an
<typeStatus id="33BCDEBE632B738B4B183D3BCA598F85" type="isotype">isotype</typeStatus>
of
<taxonomicName id="78BD3145DB377000F744485AAF5B4E7B" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="4C6080F9F695D595A71C284637DB858D" italics="true">A. obscura</emphasis>
</taxonomicName>
from H.
<taxonomicName id="C2843C4D278A677545D0403160D6182B" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="BA1C5D5725971814D41404C300F60300" italics="true">Acarospora obscura</emphasis>
</taxonomicName>
has flat smooth brownish-black areoles less than
<quantity id="937BBA555821B36ECD44BB50218C81A3" metricMagnitude="-4" metricUnit="m" metricValue="5.0" unit="mm" value="0.5">0.5 mm</quantity>
wide, cortex less than 30 µm thick, broadly attached with a black underside, punctiform immersed apothecia
<quantity id="AD08DBA80C97236DD506552A53F5835B" metricMagnitude="-4" metricUnit="m" metricValue="2.0" metricValueMax="3.0" metricValueMin="1.0" unit="mm" value="0.2" valueMax="0.3" valueMin="0.1">0.10.3 mm</quantity>
wide, parathecium indistinct to 15 µm wide, with a low hymenium less than 100 µm. We have seen no specimens of
<taxonomicName id="8EFCED533994B589F4A50B7463F47291" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="14FA2768BA1BFFCDC0DAB169D7C79A41" italics="true">A. obscura</emphasis>
</taxonomicName>
from
<collectingRegion id="67E397DFF0343F123F90F3B34A18CDFF" country="United States of America" name="California">California</collectingRegion>
.
<taxonomicName id="34DDE1DAC6D5753A1E7B9A5F49FC6470" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="D642F6A666C391E068A24CB47970B527" italics="true">Acarospora tejonensis</emphasis>
</taxonomicName>
can have small dark brownish-black areoles like
<taxonomicName id="4BB8A9C0E4EB182F462A3BF6A2DE5AAD" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="26FFF8D82623224EBBEB9830FE363579" italics="true">A. obscura</emphasis>
</taxonomicName>
but differs in the thicker cortex 3050 ( 70) µm, a thickening mycelial base, a higher hymenium usually 120 µm tall. The specimen of
<taxonomicName id="D323E8107E83DACE70DDD8533C098F32" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="9117FFBD47D933DB214DC774EA5AEE9E" italics="true">A. tejonensis</emphasis>
</taxonomicName>
from Santa Rosa Island has areoles both small and all black. It is probable Magnusson identified a small blackish specimen of
<taxonomicName id="7037D41BE5067DA639C27C92E04D6055" authorityName="K. Knudsen &amp; Kocourk." authorityYear="2025" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="tejonensis">
<emphasis id="10120F48A0169E28808CC66007238582" italics="true">A. tejonensis</emphasis>
</taxonomicName>
as
<taxonomicName id="6E6EF23DE12B833F25F5A9D67C1036D1" class="Lecanoromycetes" family="Acarosporaceae" genus="Acarospora" kingdom="Fungi" order="Acarosporales" phylum="Ascomycota" rank="species" species="obscura">
<emphasis id="0DE4DAA1F10C3B474199D07822475FB6" italics="true">A. obscura</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>