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<document id="AB4A5A839189377E1F6FC38E02A76020" ID-DOI="10.11646/zootaxa.3076.1.1" ID-ISSN="1175­5334" ID-Zenodo-Dep="5243500" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1629749671195" checkinUser="felipe" docAuthor="Hansen, Jesper &amp; Holmer, Lars E." docDate="2011" docId="A87D878BFFCCFFC60BA8F8D3FC15FDC7" docLanguage="en" docName="zt03076p122.pdf" docOrigin="Zootaxa 3076 (1)" docSource="https://biotaxa.org/Zootaxa/article/view/zootaxa.3076.1.1" docStyle="DocumentStyle:D239614CE4198176A422035174489AB1.4:Zootaxa.2009-2012.monograph" docStyleId="D239614CE4198176A422035174489AB1" docStyleName="Zootaxa.2009-2012.monograph" docStyleVersion="4" docTitle="Semitreta basisslettaensis Hansen &amp; Holmer 2011, sp. nov." docType="treatment" docVersion="3" lastPageNumber="62" masterDocId="5444FFF3FFF6FFFB0B3FFFF1F866FF98" masterDocTitle="Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076" masterLastPageNumber="122" masterPageNumber="1" pageNumber="59" updateTime="1699105918309" updateUser="plazi" zenodo-license-document="CLOSED">
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<mods:title id="F15EDB7EC3A965A6812329F2417F7C78">Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076</mods:title>
</mods:titleInfo>
<mods:name id="F9805CFB7FC5CB9DF489AAAEB934682E" type="personal">
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<mods:namePart id="DCB3C27A76411A6975D55DF35F930C42">Hansen, Jesper</mods:namePart>
</mods:name>
<mods:name id="2FF6818027CBE29DDB1F78FAC23DBB4C" type="personal">
<mods:role id="870CA066148B5957C3F13E43FFAFFBEE">
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<mods:namePart id="92739532FAF2D643FC4335B97EB512F3">Holmer, Lars E.</mods:namePart>
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<mods:typeOfResource id="131A9F011354B1F8C9A7595E503C0C96">text</mods:typeOfResource>
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<mods:title id="DB0EFC243878813CE745CD00A7E76371">Zootaxa</mods:title>
</mods:titleInfo>
<mods:part id="B2B16F9D7E47E2B0FE3D94E5067E268C">
<mods:date id="E490FA93CF9F22E686F3FE2425C70FAF">2011</mods:date>
<mods:detail id="DD2C446E8CA62C11B78706A6549085A1" type="pubDate">
<mods:number id="568B4707C8C53DCA320FE8C9AB4147C3">2011-10-28</mods:number>
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<mods:detail id="111B471DD80E809D908FEF5CF6193D82" type="volume">
<mods:number id="BED4FA1C162F6A1AD289AF80681A4707">3076</mods:number>
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<mods:number id="B98E6609661E38E1C3E102B604A6003F">1</mods:number>
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<mods:start id="CF4CA5656C6194AC92DD99F24371109A">1</mods:start>
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<mods:url id="37CB007A927CB4A40373F0E47B899A8E">https://biotaxa.org/Zootaxa/article/view/zootaxa.3076.1.1</mods:url>
</mods:location>
<mods:classification id="D36AAB5C8675D79B3E89511BDE3371E8">journal article</mods:classification>
<mods:identifier id="A6458E34A28469B35B571DEEDAA78F50" type="DOI">10.11646/zootaxa.3076.1.1</mods:identifier>
<mods:identifier id="7904DA1174374A53D6C1D202238AC0DC" type="ISSN">1175­5334</mods:identifier>
<mods:identifier id="9987B2ED45BEA889CA736509834B0E73" type="Zenodo-Dep">5243500</mods:identifier>
</mods:mods>
<treatment id="A87D878BFFCCFFC60BA8F8D3FC15FDC7" LSID="urn:lsid:plazi:treatment:A87D878BFFCCFFC60BA8F8D3FC15FDC7" httpUri="http://treatment.plazi.org/id/A87D878BFFCCFFC60BA8F8D3FC15FDC7" lastPageId="61" lastPageNumber="62" pageId="58" pageNumber="59">
<subSubSection id="68CE6516FFCCFFC10BA8F8D3FA67F8C5" pageId="58" pageNumber="59" type="nomenclature">
<paragraph id="206B369DFFCCFFC10BA8F8D3FA4BF8A4" blockId="58.[151,557,1826,1885]" box="[151,557,1826,1852]" pageId="58" pageNumber="59">
<heading id="7B2381F1FFCCFFC10BA8F8D3FA4BF8A4" bold="true" box="[151,557,1826,1852]" fontSize="11" level="1" pageId="58" pageNumber="59" reason="1">
<emphasis id="12A0EA8FFFCCFFC10BA8F8D3FA4BF8A4" bold="true" box="[151,557,1826,1852]" pageId="58" pageNumber="59">
<taxonomicName id="E7D44D1EFFCCFFC10BA8F8D3F9AEF8A4" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" box="[151,456,1826,1852]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="58" pageNumber="59" phylum="Brachiopoda" rank="species" species="basisslettaensis" status="sp. nov.">
<emphasis id="12A0EA8FFFCCFFC10BA8F8D3F9AEF8A4" bold="true" box="[151,456,1826,1852]" italics="true" pageId="58" pageNumber="59">Semitreta basisslettaensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCCFFC10AEFF8D3FA4BF8A4" box="[464,557,1826,1852]" pageId="58" pageNumber="59" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="206B369DFFCCFFC10BA8F8B4FA67F8C5" blockId="58.[151,557,1826,1885]" box="[151,513,1861,1885]" pageId="58" pageNumber="59">
Pl. 15,
<figureCitation id="B8EF2A18FFCCFFC10BD9F8B4F952F8C5" box="[230,308,1861,1885]" captionStart="FIGURE 2" captionStartId="9.[151,244,1919,1940]" captionTargetBox="[174,1423,157,1906]" captionTargetId="figure-80@9.[174,1426,157,1906]" captionTargetPageId="9" captionText="FIGURE 2 Stratigraphical ranges and diversity of brachiopod species at Basissletta, Spitsbergen, and relative sea levels and percentages of linguliform brachiopods in the total brachiopod fauna. White shading in the last graph indicates stratigraphical intervals without brachiopods. Thicknesses of units are according to Fortey &amp; Bruton (1973). Lithological log and sea level curve are from Hansen &amp; Holmer (2010)." figureDoi="http://doi.org/10.5281/zenodo.5243504" httpUri="https://zenodo.org/record/5243504/files/figure.png" pageId="58" pageNumber="59">Figs. 2</figureCitation>
–17;
<tableCitation id="6D560326FFCCFFC10A54F8B4FA67F8C5" box="[363,513,1861,1885]" captionStart-0="TABLE 16" captionStart-1="TABLE 17" captionStartId-0="61.[151,232,664,685]" captionStartId-1="61.[151,232,1271,1292]" captionText-0="TABLE 16. Shell measurements of Semitreta basisslettaensis sp. nov." captionText-1="TABLE 17. Shell measurements of dorsal valve of Semitreta basisslettaensis sp. nov." pageId="58" pageNumber="59">Tables 16–17</tableCitation>
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFCCFFC10BA8F87CFC6AF83D" box="[151,1036,1933,1958]" pageId="58" pageNumber="59" type="description">
<paragraph id="206B369DFFCCFFC10BA8F87CFC6AF83D" blockId="58.[151,1436,1933,2030]" box="[151,1036,1933,1958]" pageId="58" pageNumber="59">
<emphasis id="12A0EA8FFFCCFFC10BA8F87CF9E2F83E" bold="true" box="[151,388,1933,1958]" inLineHeading="true" pageId="58" pageNumber="59" reason="1">Derivation of name.</emphasis>
Named after the Basissletta plain, where it was collected.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFCCFFC70BF8F840FB7CFBAE" lastPageId="60" lastPageNumber="61" pageId="58" pageNumber="59" type="materials_examined">
<paragraph id="206B369DFFCCFFC70BF8F840F88FFF2A" blockId="58.[151,1436,1933,2030]" lastBlockId="60.[151,1437,157,871]" lastPageId="60" lastPageNumber="61" pageId="58" pageNumber="59">
<materialsCitation id="90BC3CC0FFCCFFC70BF8F840F88FFF2A" collectionCode="TSGF" lastPageId="60" lastPageNumber="61" latitude="79.85056" longLatPrecision="1" longitude="17.690483" pageId="58" pageNumber="59" specimenCode="TSGF16815" specimenCount="1" typeStatus="holotype">
<emphasis id="12A0EA8FFFCCFFC10BF8F840F95DF851" bold="true" box="[199,315,1969,1993]" inLineHeading="true" pageId="58" pageNumber="59" reason="1">
<typeStatus id="FF6F883FFFCCFFC10BF8F840F950F851" box="[199,310,1969,1993]" pageId="58" pageNumber="59" type="holotype">Holotype</typeStatus>
.
</emphasis>
Pl. 15, Figs. 13–16;
<specimenCode id="70729EE6FFCCFFC1090CF840FAA7F851" box="[563,705,1969,1993]" collectionCode="TSGF" pageId="58" pageNumber="59">TSGF16815</specimenCode>
, ventral valve; basal bed of Olenidsletta Member, Valhallfonna Formation, sample JH-152;
<geoCoordinate id="45E0505AFFCCFFC10AEFF824FA04F875" box="[464,610,2005,2029]" degrees="79" direction="north" minutes="51.034" orientation="latitude" pageId="58" pageNumber="59" precision="1" value="79.85056">N79°51.034’</geoCoordinate>
<geoCoordinate id="45E0505AFFCCFFC10956F824FA9CF875" box="[617,762,2005,2029]" degrees="17" direction="east" minutes="41.429" orientation="longitude" pageId="58" pageNumber="59" precision="1" value="17.690483">E17°41.429’</geoCoordinate>
, Profilstranda beach, Basissletta, Ny Friesland, Spitsbergen.
<emphasis id="12A0EA8FFFCAFFC70BA8FF6CF88FFF2A" bold="true" box="[151,233,157,178]" pageId="60" pageNumber="61">Plate 15</emphasis>
</materialsCitation>
</paragraph>
<paragraph id="206B369DFFCAFFC70BA8FF4CF9B2FF4A" blockId="60.[151,1437,157,871]" box="[151,468,189,210]" pageId="60" pageNumber="61">
<taxonomicName id="E7D44D1EFFCAFFC70BA8FF4CF9E5FF4A" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" box="[151,387,189,210]" class="Lingulata" family="Acrotretidae" genus="Hisingerella" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="maniformis" status="sp. nov.">
<emphasis id="12A0EA8FFFCAFFC70BA8FF4CF9E5FF4A" box="[151,387,189,210]" italics="true" pageId="60" pageNumber="61">Hisingerella maniformis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCAFFC70AB8FF4CF9B2FF4A" box="[391,468,189,210]" pageId="60" pageNumber="61" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FF2CFACAFF6A" blockId="60.[151,1437,157,871]" box="[223,684,221,242]" pageId="60" pageNumber="61">Valhallfonna Formation, Profilbekken Member.</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FF0DFD61FE89" blockId="60.[151,1437,157,871]" box="[223,1287,252,273]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FF0DFD65FE89" box="[223,1283,252,273]" collectingDate="2008-04-08" collectionCode="TSGF" collectorName="Coll. J. Hansen" elevation="26" pageId="60" pageNumber="61" specimenCode="TSGF17011" specimenCount="1" typeStatus="paratype">
1.
<specimenCode id="70729EE6FFCAFFC70BC8FF0DF916FE89" box="[247,368,252,273]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF17011</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70A46FF0DF9A8FE89" box="[377,462,252,273]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, ventral valve interior.
<quantity id="E72C9B78FFCAFFC70992FF0DFAB8FE89" box="[685,734,252,273]" metricMagnitude="1" metricUnit="m" metricValue="2.6" pageId="60" pageNumber="61" unit="m" value="26.0">
<elevation id="ABF9D1AEFFCAFFC70992FF0DFAB8FE89" box="[685,734,252,273]" metricMagnitude="1" metricUnit="m" metricValue="2.6" pageId="60" pageNumber="61" unit="m" value="26.0">26 m</elevation>
</quantity>
above base.
<collectorName id="8D21534BFFCAFFC70866FF0DFB88FE89" box="[857,1006,252,273]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC708C8FF0DFC00FE89" box="[1015,1126,252,273]" pageId="60" pageNumber="61" value="2008-04-08">
<collectingDate id="442EE9B5FFCAFFC708C8FF0DFC00FE89" box="[1015,1126,252,273]" pageId="60" pageNumber="61" value="2008-04-08">04.08.2008</collectingDate>
</date>
, sample JH-184
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BA8FEEDF986FEA9" blockId="60.[151,1437,157,871]" box="[151,480,284,305]" pageId="60" pageNumber="61">
<taxonomicName id="E7D44D1EFFCAFFC70BA8FEEDF9E8FEA9" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" box="[151,398,284,305]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="basisslettaensis" status="sp. nov.">
<emphasis id="12A0EA8FFFCAFFC70BA8FEEDF9E8FEA9" box="[151,398,284,305]" italics="true" pageId="60" pageNumber="61">Semitreta basisslettaensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCAFFC70AABFEEDF986FEA9" box="[404,480,284,305]" pageId="60" pageNumber="61" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FECDFCD7FEE9" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FECDFCCBFEE9" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Kirtonryggen Formation &amp; Nordporten Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16915" specimenCount="1" typeStatus="paratype">
2–5.
<specimenCode id="70729EE6FFCAFFC70A2FFECDF9EFFEC9" box="[272,393,316,337]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16915</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70AABFECDF98FFEC9" box="[404,489,316,337]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, dorsal valve exterior, oblique lateral view, detail of larval micro-ornamentation, and larval shell.
<collectorName id="8D21534BFFCAFFC70BE0FEADF9ABFEE9" box="[223,461,348,369]" pageId="60" pageNumber="61">Kirtonryggen Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70AE9FEADFAF8FEE9" box="[470,670,348,369]" pageId="60" pageNumber="61">Nordporten Member</collectorName>
, top beds.
<collectorName id="8D21534BFFCAFFC7083BFEADFBFFFEE9" box="[772,921,348,369]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC7089DFEADFC76FEE9" box="[930,1040,348,369]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC7089DFEADFC76FEE9" box="[930,1040,348,369]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-153
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FE8DFADDFE29" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FE8DFAD1FE29" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Valhallfonna Formation &amp; Olenidsletta Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16814" specimenCount="1" typeStatus="paratype">
6–7.
<specimenCode id="70729EE6FFCAFFC70A2FFE8DF9EFFE09" box="[272,393,380,401]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16814</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70AAAFE8DF98CFE09" box="[405,490,380,401]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, dorsal valve interior, oblique lateral view.
<collectorName id="8D21534BFFCAFFC708A7FE8DFCE5FE09" box="[920,1155,380,401]" pageId="60" pageNumber="61">Valhallfonna Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70FB0FE8DFD06FE09" box="[1167,1376,380,401]" pageId="60" pageNumber="61">Olenidsletta Member</collectorName>
, basal bed.
<collectorName id="8D21534BFFCAFFC70A32FE6DF9C4FE29" box="[269,418,412,433]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70A93FE6DFA7CFE29" box="[428,538,412,433]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC70A93FE6DFA7CFE29" box="[428,538,412,433]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-152
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FE4DFA8FFE68" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FE4DFA83FE68" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Kirtonryggen Formation &amp; Nordporten Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16912" specimenCount="1" typeStatus="paratype">
8–9.
<specimenCode id="70729EE6FFCAFFC70A2FFE4DF9EFFE49" box="[272,393,444,465]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16912</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70AACFE4DF98EFE49" box="[403,488,444,465]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, dorsal valve interior, oblique posterolateral view.
<collectorName id="8D21534BFFCAFFC708E9FE4DFCA3FE49" box="[982,1221,444,465]" pageId="60" pageNumber="61">Kirtonryggen Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70FF0FE4DFDFFFE49" box="[1231,1433,444,465]" pageId="60" pageNumber="61">Nordporten Member</collectorName>
, top beds.
<collectorName id="8D21534BFFCAFFC70A04FE2AF9B6FE68" box="[315,464,475,496]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70AE5FE2AFA2EFE68" box="[474,584,475,496]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC70AE5FE2AFA2EFE68" box="[474,584,475,496]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-153
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FE0AF988FDA8" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FE0AF98CFDA8" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Valhallfonna Formation &amp; Olenidsletta Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16816" specimenCount="1" typeStatus="paratype">
10.
<specimenCode id="70729EE6FFCAFFC70A3BFE0AF91BFD88" box="[260,381,507,528]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16816</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70AB6FE0AF9B8FD88" box="[393,478,507,528]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, ventral valve exterior.
<collectorName id="8D21534BFFCAFFC709F8FE0AFBD4FD88" box="[711,946,507,528]" pageId="60" pageNumber="61">Valhallfonna Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70882FE0AFCEAFD88" box="[957,1164,507,528]" pageId="60" pageNumber="61">Olenidsletta Member</collectorName>
, basal bed.
<collectorName id="8D21534BFFCAFFC70E3FFE0AFDFEFD88" box="[1280,1432,507,528]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70BE0FDEAF92BFDA8" box="[223,333,539,560]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC70BE0FDEAF92BFDA8" box="[223,333,539,560]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-152
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FDCAFA94FDE8" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FDCAFA88FDE8" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Valhallfonna Formation &amp; Olenidsletta Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16817" specimenCount="1" typeStatus="paratype">
11–12.
<specimenCode id="70729EE6FFCAFFC70A15FDCAF9C2FDC8" box="[298,420,571,592]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16817</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70A8EFDCAFA60FDC8" box="[433,518,571,592]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, ventral valve exterior, oblique lateral view.
<collectorName id="8D21534BFFCAFFC708F2FDCAFCDFFDC8" box="[973,1209,571,592]" pageId="60" pageNumber="61">Valhallfonna Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70FF8FDCAFDFFFDC8" box="[1223,1433,571,592]" pageId="60" pageNumber="61">Olenidsletta Member</collectorName>
, basal bed.
<collectorName id="8D21534BFFCAFFC70A7BFDAAF9BFFDE8" box="[324,473,603,624]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70ADCFDAAFA37FDE8" box="[483,593,603,624]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC70ADCFDAAFA37FDE8" box="[483,593,603,624]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-152
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FD8AFDF5FD28" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE0FD8AFDE9FD28" collectingDate="2008-07-29" collectionCode="TSGF" collectorName="Valhallfonna Formation &amp; Olenidsletta Member &amp; Coll. J. Hansen" pageId="60" pageNumber="61" specimenCode="TSGF16815" specimenCount="1" typeStatus="holotype">
13–16.
<specimenCode id="70729EE6FFCAFFC70A15FD8AF9C5FD08" box="[298,419,635,656]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16815</specimenCode>
,
<emphasis id="12A0EA8FFFCAFFC70A90FD8BFA61FD17" bold="true" box="[431,519,634,655]" pageId="60" pageNumber="61">
<typeStatus id="FF6F883FFFCAFFC70A90FD8BFA61FD17" box="[431,519,634,655]" pageId="60" pageNumber="61" type="holotype">holotype</typeStatus>
</emphasis>
, ventral valve exterior, oblique lateral view, lateral view of larval shell, and detail of larval micro-ornamentation.
<collectorName id="8D21534BFFCAFFC70A8AFD6AFAF8FD28" box="[437,670,667,688]" pageId="60" pageNumber="61">Valhallfonna Formation</collectorName>
,
<collectorName id="8D21534BFFCAFFC70997FD6AFB10FD28" box="[680,886,667,688]" pageId="60" pageNumber="61">Olenidsletta Member</collectorName>
, basal bed.
<collectorName id="8D21534BFFCAFFC708DAFD6AFC1FFD28" box="[997,1145,667,688]" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70FBCFD6AFC97FD28" box="[1155,1265,667,688]" pageId="60" pageNumber="61" value="2008-07-29">
<collectingDate id="442EE9B5FFCAFFC70FBCFD6AFC97FD28" box="[1155,1265,667,688]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</collectingDate>
</date>
, sample JH-152
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FD4AF988FD77" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
17. Ventral valve interior. Specimen lost. Valhallfonna Formation, Olenidsletta Member, basal bed. Coll. J. Hansen,
<date id="546A105DFFCAFFC70BE0FD2BF92BFD77" box="[223,333,730,751]" pageId="60" pageNumber="61" value="2008-07-29">29.07.2008</date>
, sample JH-152.
</paragraph>
<paragraph id="206B369DFFCAFFC70BA8FD0AF9C1FC97" blockId="60.[151,1437,157,871]" box="[151,423,762,784]" pageId="60" pageNumber="61">
<taxonomicName id="E7D44D1EFFCAFFC70BA8FD0AF933FC88" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" box="[151,341,763,784]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="pustulosa" status="sp. nov.">
<emphasis id="12A0EA8FFFCAFFC70BA8FD0AF933FC88" box="[151,341,763,784]" italics="true" pageId="60" pageNumber="61">Semitreta pustulosa</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCAFFC70A64FD0BF9C1FC97" box="[347,423,762,783]" pageId="60" pageNumber="61" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
<paragraph id="206B369DFFCAFFC70BE0FCEBFACAFCB7" blockId="60.[151,1437,157,871]" box="[223,684,794,815]" pageId="60" pageNumber="61">Valhallfonna Formation, Profilbekken Member.</paragraph>
<paragraph id="206B369DFFCAFFC70BE2FCC4FA2FFCFF" blockId="60.[151,1437,157,871]" pageId="60" pageNumber="61">
<materialsCitation id="90BC3CC0FFCAFFC70BE2FCC4FA23FCFF" collectingDate="2008-07-24" collectionCode="TSGF" collectorName="Coll. J. Hansen" elevation="67" pageId="60" pageNumber="61" specimenCode="TSGF16819" specimenCount="1" typeStatus="paratype">
18–20.
<specimenCode id="70729EE6FFCAFFC70A1BFCC4F9F8FCD2" box="[292,414,821,842]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16819</specimenCode>
,
<typeStatus id="FF6F883FFFCAFFC70A98FCC4F99AFCD2" box="[423,508,821,842]" pageId="60" pageNumber="61" type="paratype">paratype</typeStatus>
, dorsal valve exterior, larval shell, and detail of postlarval ornamentation.
<quantity id="E72C9B78FFCAFFC70FFEFCC4FC94FCD2" box="[1217,1266,821,842]" metricMagnitude="1" metricUnit="m" metricValue="6.7" pageId="60" pageNumber="61" unit="m" value="67.0">
<elevation id="ABF9D1AEFFCAFFC70FFEFCC4FC94FCD2" box="[1217,1266,821,842]" metricMagnitude="1" metricUnit="m" metricValue="6.7" pageId="60" pageNumber="61" unit="m" value="67.0">67 m</elevation>
</quantity>
above base.
<collectorName id="8D21534BFFCAFFC70E53FCC4F95AFCFF" pageId="60" pageNumber="61">Coll. J. Hansen</collectorName>
,
<date id="546A105DFFCAFFC70A79FCA3F9D2FCFF" box="[326,436,850,871]" pageId="60" pageNumber="61" value="2008-07-24">
<collectingDate id="442EE9B5FFCAFFC70A79FCA3F9D2FCFF" box="[326,436,850,871]" pageId="60" pageNumber="61" value="2008-07-24">24.07.2008</collectingDate>
</date>
, sample JH-95
</materialsCitation>
.
</paragraph>
<paragraph id="206B369DFFCAFFC70BF8FC08FB7CFBAE" blockId="60.[151,1436,1017,2014]" pageId="60" pageNumber="61">
<emphasis id="12A0EA8FFFCAFFC70BF8FC08F950FB8A" bold="true" box="[199,310,1017,1042]" inLineHeading="true" pageId="60" pageNumber="61" reason="1">Material.</emphasis>
23 dorsal and 17 ventral valves from samples JH-152 and JH-153. The
<typeStatus id="FF6F883FFFCAFFC70F53FC0BFCB1FB8A" box="[1132,1239,1018,1042]" pageId="60" pageNumber="61" type="paratype">paratypes</typeStatus>
are
<materialsCitation id="90BC3CC0FFCAFFC70E35FC08FDFAFB89" box="[1290,1436,1017,1041]" collectionCode="TSGF" pageId="60" pageNumber="61" specimenCode="TSGF16814" specimenCount="1">
<specimenCode id="70729EE6FFCAFFC70E35FC08FDF1FB89" box="[1290,1431,1017,1041]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16814</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFCAFFC70BA8FBEFF94EFBAE" box="[151,296,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61" specimenCode="TSGF16816" specimenCount="1">
<specimenCode id="70729EE6FFCAFFC70BA8FBEFF942FBAE" box="[151,292,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16816</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFCAFFC70A10FBEFF9A6FBAE" box="[303,448,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61" specimenCode="TSGF16817" specimenCount="1">
<specimenCode id="70729EE6FFCAFFC70A10FBEFF9DBFBAE" box="[303,445,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16817</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFCAFFC70AF7FBEFFAE7FBAE" box="[456,641,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61" specimenCode="TSGF16912" specimenCount="1">
<specimenCode id="70729EE6FFCAFFC70AF7FBEFFA34FBAE" box="[456,594,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16912</specimenCode>
and
</materialsCitation>
<materialsCitation id="90BC3CC0FFCAFFC709B6FBEFFB70FBAE" box="[649,790,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61" specimenCode="TSGF16915" specimenCount="1">
<specimenCode id="70729EE6FFCAFFC709B6FBEFFB70FBAE" box="[649,790,1054,1078]" collectionCode="TSGF" pageId="60" pageNumber="61">TSGF16915</specimenCode>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFCAFFC70BF8FBB0FB67FB39" pageId="60" pageNumber="61" type="diagnosis">
<paragraph id="206B369DFFCAFFC70BF8FBB0FB67FB39" blockId="60.[151,1436,1017,2014]" pageId="60" pageNumber="61">
<emphasis id="12A0EA8FFFCAFFC70BF8FBB0F927FBC2" bold="true" box="[199,321,1089,1114]" inLineHeading="true" pageId="60" pageNumber="61" reason="1">Diagnosis.</emphasis>
Moderately high or high conical
<taxonomicName id="E7D44D1EFFCAFFC70988FBB3FB47FBC2" authorityName="Biernat" authorityYear="1973" box="[695,801,1090,1114]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCAFFC70988FBB3FB47FBC2" box="[695,801,1090,1114]" italics="true" pageId="60" pageNumber="61">Semitreta</emphasis>
</taxonomicName>
with weak to moderately developed subtriangular apical process; steeply apsacline to procline ventral pseudointerarea with weak interridge; well-impressed median buttress; subtriangular dorsal median ridge or low septum.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFCAFFC70BF8FB5CFAE0F925" pageId="60" pageNumber="61" type="description">
<paragraph id="206B369DFFCAFFC70BF8FB5CFC67FAA9" blockId="60.[151,1436,1017,2014]" pageId="60" pageNumber="61">
<emphasis id="12A0EA8FFFCAFFC70BF8FB5CF93EFB5E" bold="true" box="[199,344,1197,1222]" inLineHeading="true" pageId="60" pageNumber="61" reason="1">Description.</emphasis>
Shell transversely oval to subcircular with narrow, gently convex posterior margin. L/W ratio 0.75–0.93. Largest measured specimen
<quantity id="E72C9B78FFCAFFC70968FB20FACBFB71" box="[599,685,1233,1257]" metricMagnitude="-3" metricUnit="m" metricValue="1.4" pageId="60" pageNumber="61" unit="mm" value="1.4">1.4 mm</quantity>
in length and 1.0 mm in half-width. Larval shell subcircular, with densely pitted micro-ornamentation. Pits circular, rather shallow and highly variable in size, reaching a maximum diameter of 3.5 µm. Postlarval shell with fine or moderately fine growth lines.
</paragraph>
<paragraph id="206B369DFFCAFFC70BF8FACFFCC1F991" blockId="60.[151,1436,1017,2014]" pageId="60" pageNumber="61">
Dorsal valve slightly convex. Sulcus present. Pseudointerarea anacline, 9% as long and 35–48% as wide as valve. Median groove 19–32% as wide as valve, with convex or straight anterior margin. Median buttress well developed. Median ridge or septum variably developed, subtriangular, with apex located at 48–67% of valve length; beginning at
<quantity id="E72C9B78FFCAFFC70A40FA58F9B2FA59" box="[383,468,1449,1473]" metricMagnitude="-4" metricUnit="m" metricValue="3.0" pageId="60" pageNumber="61" unit="mm" value="0.3">0.3 mm</quantity>
of valve length and ending at 67–87% of valve length. Cardinal muscle scars obscure or weakly impressed, small, closely spaced and subtriangular. Anterocentral muscle scars normally not impressed but otherwise small, round and located at 41% of valve length. Mantle canal system obscure.
</paragraph>
<paragraph id="206B369DFFCAFFC70BF8F9E7FAE0F925" blockId="60.[151,1436,1017,2014]" pageId="60" pageNumber="61">
Ventral valve moderately high to high conical. Pseudointerarea poorly defined, weakly concave to straight, steeply apsacline to procline, bisected by weak interridge. Valve 50–107% as high as long. Anterior and lateral slopes nearly straight to gently convex. Foramen located on poorly developed tube on apex. Mantle canal system baculate, with weak to moderately impressed
<emphasis id="12A0EA8FFFCAFFC7099DF973FB07F902" box="[674,865,1666,1690]" italics="true" pageId="60" pageNumber="61">vascula lateralia</emphasis>
. Apical process weakly or moderately developed, subtriangular, bounded by
<emphasis id="12A0EA8FFFCAFFC70AFDF957FA18F926" box="[450,638,1702,1726]" italics="true" pageId="60" pageNumber="61">vascula lateralia</emphasis>
.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFCAFFC60BF8F93BFC15FDC7" lastPageId="61" lastPageNumber="62" pageId="60" pageNumber="61" type="discussion">
<paragraph id="206B369DFFCAFFC60BF8F93BF9B9FD8F" blockId="60.[151,1436,1017,2014]" lastBlockId="61.[151,1436,151,608]" lastPageId="61" lastPageNumber="62" pageId="60" pageNumber="61">
<emphasis id="12A0EA8FFFCAFFC70BF8F93BF95DF97A" bold="true" box="[199,315,1738,1762]" inLineHeading="true" pageId="60" pageNumber="61" reason="1">Remarks.</emphasis>
<bibRefCitation id="44454B6CFFCAFFC70A7DF938FA32F979" author="Brock, G. A. &amp; Holmer, L. E." box="[322,596,1737,1761]" pageId="60" pageNumber="61" pagination="113 - 132" refId="ref73105" refString="Brock, G. A. &amp; Holmer, L. E. (2004) Early Ordovician lingulate brachiopods from the Emanuel Formation, Canning Basin, Western Australia. Memoirs of the Association of Australasian Palaeontologists, 30, 113 - 132." type="journal article" year="2004">Brock &amp; Holmer (2004)</bibRefCitation>
redefined
<taxonomicName id="E7D44D1EFFCAFFC709F3F93BFB50F97A" authorityName="Biernat" authorityYear="1973" box="[716,822,1738,1762]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCAFFC709F3F93BFB50F97A" box="[716,822,1738,1762]" italics="true" pageId="60" pageNumber="61">Semitreta</emphasis>
</taxonomicName>
to include
<taxonomicName id="E7D44D1EFFCAFFC7088AF93BFC54F979" box="[949,1074,1738,1761]" class="Lingulata" family="Acrotretidae" genus="Hansotreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Linguliporida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCAFFC7088AF93BFC54F979" box="[949,1074,1738,1761]" italics="true" pageId="60" pageNumber="61">Hansotreta</emphasis>
</taxonomicName>
in their synonymy based on the fact that the features of
<taxonomicName id="E7D44D1EFFCAFFC70A9CF91EFA46F89E" box="[419,544,1775,1798]" class="Lingulata" family="Acrotretidae" genus="Hansotreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Linguliporida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCAFFC70A9CF91EFA46F89E" box="[419,544,1775,1798]" italics="true" pageId="60" pageNumber="61">Hansotreta</emphasis>
</taxonomicName>
apparently conformed to the current understanding of
<taxonomicName id="E7D44D1EFFCAFFC70FB7F91FFC94F89E" authorityName="Biernat" authorityYear="1973" box="[1160,1266,1774,1798]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCAFFC70FB7F91FFC94F89E" box="[1160,1266,1774,1798]" italics="true" pageId="60" pageNumber="61">Semitreta</emphasis>
</taxonomicName>
. In their list of included species, they did not include the two Chinese species described by
<bibRefCitation id="44454B6CFFCAFFC708CFF8E0FCCAF8B1" author="Liu, D. - Y. &amp; Xu, H. - K. &amp; Liang, W. - P." box="[1008,1196,1809,1834]" pageId="60" pageNumber="61" pagination="254 - 286" refId="ref76623" refString="Liu, D. - Y., Xu, H. - K. &amp; Liang, W. - P. (1983) Phylum Brachiopoda. In: Nanjing Institute of Geology and Mineral Resources (Eds.), Palaeontological Atlas of East China. Early Palaeozoic Volumen 1. Geological Publishing House, Beijing, pp. 254 - 286, pls. 89 - 99. [in Chinese]." type="book chapter" year="1983">
Liu
<emphasis id="12A0EA8FFFCAFFC70F21F8E3FC36F8B2" box="[1054,1104,1810,1834]" italics="true" pageId="60" pageNumber="61">et al</emphasis>
. (1983)
</bibRefCitation>
. The Chinese species probably do not belong to the genus, but they can be compared with the species from Spitsbergen.
<taxonomicName id="E7D44D1EFFCAFFC70FE3F8C7F8D3F8E9" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="bassisslettaensis" status="sp. nov.">
<emphasis id="12A0EA8FFFCAFFC70FE3F8C7F8D3F8E9" italics="true" pageId="60" pageNumber="61">S. bassisslettaensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCAFFC70B84F8ABF974F8E9" box="[187,274,1882,1905]" pageId="60" pageNumber="61" rank="species">sp. nov.</taxonomicNameLabel>
is distinguished from both
<taxonomicName id="E7D44D1EFFCAFFC7097AF8ABFA99F8EA" authority="Hansen &amp; Holmer, 2011" authorityName="Hansen &amp; Holmer" authorityYear="2011" box="[581,767,1882,1906]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="spitsbergensis" status="sp. nov.">
<emphasis id="12A0EA8FFFCAFFC7097AF8ABFA99F8EA" box="[581,767,1882,1906]" italics="true" pageId="60" pageNumber="61">S. spitsbergensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="099357F4FFCAFFC70839F8ABFB3BF8E9" box="[774,861,1882,1905]" pageId="60" pageNumber="61" rank="species">sp. nov.</taxonomicNameLabel>
from Spitsbergen and
<taxonomicName id="E7D44D1EFFCAFFC70F64F8ABF963F80E" authority="(Krause &amp; Rowell, 1975)" baseAuthorityName="Krause &amp; Rowell" baseAuthorityYear="1975" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="acrobela">
<emphasis id="12A0EA8FFFCAFFC70F64F8ABFCBFF8EA" box="[1115,1241,1882,1906]" italics="true" pageId="60" pageNumber="61">S. acrobela</emphasis>
(
<bibRefCitation id="44454B6CFFCAFFC70FD6F8A8F89BF80E" author="Krause, F. F. &amp; Rowell, A. J." pageId="60" pageNumber="61" pagination="1 - 74" refId="ref76281" refString="Krause, F. F. &amp; Rowell, A. J. (1975) Distribution and systematics of the inarticulate brachiopods of the Ordovician carbonate mud mound of Meiklejohn Peak, Nevada. The University of Kansas Paleontological Contributions, Article, 61, 1 - 74, 12 pls." type="journal article" year="1975">Krause &amp; Rowell, 1975</bibRefCitation>
)
</taxonomicName>
from
<collectingRegion id="E210F87FFFCAFFC70A6FF88FF9CFF80E" box="[336,425,1918,1942]" country="United States of America" name="Nevada" pageId="60" pageNumber="61">Nevada</collectingRegion>
,
<collectingCountry id="58C3760DFFCAFFC70A88F88FF989F80E" box="[439,495,1918,1942]" name="United States of America" pageId="60" pageNumber="61">USA</collectingCountry>
by lacking an apical process that completely occludes the apex and by having a markedly more low conical ventral valve.
<emphasis id="12A0EA8FFFCAFFC70945F853FAFBF822" box="[634,669,1954,1978]" italics="true" pageId="60" pageNumber="61">S.?</emphasis>
<taxonomicName id="E7D44D1EFFCAFFC7099AF853FB3DF821" authority="Liu" authorityName="Liu" box="[677,859,1953,1977]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="60" pageNumber="61" phylum="Brachiopoda" rank="species" species="jiangxiensis">
<emphasis id="12A0EA8FFFCAFFC7099AF853FB4DF821" box="[677,811,1954,1977]" italics="true" pageId="60" pageNumber="61">jiangxiensis</emphasis>
Liu
</taxonomicName>
in
<bibRefCitation id="44454B6CFFCAFFC708BDF850FC54F821" author="Liu, D. - Y. &amp; Xu, H. - K. &amp; Liang, W. - P." box="[898,1074,1953,1978]" pageId="60" pageNumber="61" pagination="254 - 286" refId="ref76623" refString="Liu, D. - Y., Xu, H. - K. &amp; Liang, W. - P. (1983) Phylum Brachiopoda. In: Nanjing Institute of Geology and Mineral Resources (Eds.), Palaeontological Atlas of East China. Early Palaeozoic Volumen 1. Geological Publishing House, Beijing, pp. 254 - 286, pls. 89 - 99. [in Chinese]." type="book chapter" year="1983">
Liu
<emphasis id="12A0EA8FFFCAFFC7088EF853FB82F822" box="[945,996,1954,1978]" italics="true" pageId="60" pageNumber="61">et al</emphasis>
., 1983
</bibRefCitation>
from the Middle Ordovician of
<collectingCountry id="58C3760DFFCAFFC70BA8F837F8BCF846" box="[151,218,1990,2014]" name="China" pageId="60" pageNumber="61">China</collectingCountry>
differs by having a very short dorsal ridge or septum reaching only slightly anterior to the midvalve and a strongly transverse-oval outline.
<taxonomicName id="E7D44D1EFFCBFFC60931FF69FBE3FF37" authority="Ushatinskaya, 1994" authorityName="Ushatinskaya" authorityYear="1994" box="[526,901,151,176]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="species" species="kotujensis">
<emphasis id="12A0EA8FFFCBFFC60931FF69FAFAFF28" box="[526,668,152,176]" italics="true" pageId="61" pageNumber="62">S. kotujensis</emphasis>
<bibRefCitation id="44454B6CFFCBFFC6099AFF66FBE3FF37" author="Ushatinskaya, G. T." box="[677,901,151,175]" pageId="61" pageNumber="62" pagination="38 - 54" refId="ref79713" refString="Ushatinskaya, G. T. (1994) Novye sredne-pozdnekembriyskie akrotretidy (brakhiopody) Severa Sibirskoy platformy i nekotorye voprosy ikh systematiki. (New Middle and Late Cambrian acrotretids (brachiopods) from the north Siberian Platform, and some problems with their systematics.) Paleontologicheskii Zhurnal, 1994 (4), 38 - 54." type="journal article" year="1994">Ushatinskaya, 1994</bibRefCitation>
</taxonomicName>
from the Upper Cambrian of Siberia is distinguished by having a narrow, high conical ventral valve, a geniculate dorsal valve, and a poorly developed apical process.
<taxonomicName id="E7D44D1EFFCBFFC60BC6FF11FA0CFF6F" authority="Brock &amp; Holmer, 2004" authorityName="Brock &amp; Holmer" authorityYear="2004" box="[249,618,223,248]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="species" species="lauriei">
<emphasis id="12A0EA8FFFCBFFC60BC6FF11F906FF60" box="[249,352,224,248]" italics="true" pageId="61" pageNumber="62">S. lauriei</emphasis>
<bibRefCitation id="44454B6CFFCBFFC60A58FF2EFA0CFF6F" author="Brock, G. A. &amp; Holmer, L. E." box="[359,618,223,247]" pageId="61" pageNumber="62" pagination="113 - 132" refId="ref73105" refString="Brock, G. A. &amp; Holmer, L. E. (2004) Early Ordovician lingulate brachiopods from the Emanuel Formation, Canning Basin, Western Australia. Memoirs of the Association of Australasian Palaeontologists, 30, 113 - 132." type="journal article" year="2004">Brock &amp; Holmer, 2004</bibRefCitation>
</taxonomicName>
from the Floian of
<collectingCountry id="58C3760DFFCBFFC6087AFF2EFBCDFF6F" box="[837,939,223,247]" name="Australia" pageId="61" pageNumber="62">Australia</collectingCountry>
is distinguished by having a gently concave upper half of the anterior slope of the very high ventral valve and by having a pseudointerarea that is always apsacline and provided with an intertrough.
<emphasis id="12A0EA8FFFCBFFC6096EFED9FA12FED8" box="[593,628,296,320]" italics="true" pageId="61" pageNumber="62">S.?</emphasis>
<taxonomicName id="E7D44D1EFFCBFFC60944FED8FBFFFEA7" authority="(Gorjansky, 1969)" baseAuthorityName="Gorjansky" baseAuthorityYear="1969" box="[635,921,295,320]" class="Lingulata" family="Obolidae" genus="Ectenoglossa" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="species" species="magna">
<emphasis id="12A0EA8FFFCBFFC60944FED8FAA1FED8" box="[635,711,297,320]" italics="true" pageId="61" pageNumber="62">magna</emphasis>
(
<bibRefCitation id="44454B6CFFCBFFC609EAFED6FBF7FEA7" author="Gorjansky, V. Yu." box="[725,913,295,319]" pageId="61" pageNumber="62" pagination="1 - 173" refId="ref74254" refString="Gorjansky, V. Yu. (1969) Bezzamkovye brakhiopody kembrijskikh i ordovikskikh otlozhenij severo-zapada Russkoj platformy. (Inarticulate brachiopods of the Cambrian and Ordovician deposits of the north-west Russian platform.) Ministerstvo Geologii RSFSR, Severo-Zapadnoe Territorialnoe Geologicheskoe Upravlenie, 6, 1 - 173. [in Russian]." type="journal article" year="1969">Gorjansky, 1969</bibRefCitation>
)
</taxonomicName>
from the Lower Ordovician of
<collectingCountry id="58C3760DFFCBFFC60FC6FED6FD2BFEA7" box="[1273,1357,295,319]" name="Estonia" pageId="61" pageNumber="62">Estonia</collectingCountry>
differs by having an intertrough and a gently but distinctly concave anterior slope.
<taxonomicName id="E7D44D1EFFCBFFC608DEFEBDFCB8FEFC" authority="Biernat, 1973" authorityName="Biernat" authorityYear="1973" box="[993,1246,332,356]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="species" species="maior">
<emphasis id="12A0EA8FFFCBFFC608DEFEBDFC26FEFC" box="[993,1088,332,356]" italics="true" pageId="61" pageNumber="62">S. maior</emphasis>
<bibRefCitation id="44454B6CFFCBFFC60F79FEBDFCB8FEFC" author="Biernat, G." box="[1094,1246,332,356]" pageId="61" pageNumber="62" pagination="1 - 120" refId="ref72933" refString="Biernat, G. (1973) Ordovician inarticulate brachiopods from Poland and Estonia. Palaeontologia Polonica, 28, 1 - 120, 40 pls." type="journal article" year="1973">Biernat, 1973</bibRefCitation>
</taxonomicName>
from the Tremadocian of
<collectingCountry id="58C3760DFFCBFFC60A2EFE9EF939FE1F" box="[273,351,367,391]" name="Poland" pageId="61" pageNumber="62">Poland</collectingCountry>
differs by having an apsacline ventral pseudointerarea and a very weakly developed dorsal median ridge.
<emphasis id="12A0EA8FFFCBFFC60A06FE65FA62FE34" box="[313,516,404,428]" italics="true" pageId="61" pageNumber="62">
S.?
<taxonomicName id="E7D44D1EFFCBFFC60A5CFE65FA62FE34" box="[355,516,404,428]" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="species" species="shangraoensis">shangraoensis</taxonomicName>
</emphasis>
(Liu in
<bibRefCitation id="44454B6CFFCBFFC6095EFE65FB76FE34" author="Liu, D. - Y. &amp; Xu, H. - K. &amp; Liang, W. - P." box="[609,784,404,428]" pageId="61" pageNumber="62" pagination="254 - 286" refId="ref76623" refString="Liu, D. - Y., Xu, H. - K. &amp; Liang, W. - P. (1983) Phylum Brachiopoda. In: Nanjing Institute of Geology and Mineral Resources (Eds.), Palaeontological Atlas of East China. Early Palaeozoic Volumen 1. Geological Publishing House, Beijing, pp. 254 - 286, pls. 89 - 99. [in Chinese]." type="book chapter" year="1983">
Liu
<emphasis id="12A0EA8FFFCBFFC609B0FE64FAA7FE34" box="[655,705,404,428]" italics="true" pageId="61" pageNumber="62">et al</emphasis>
., 1983
</bibRefCitation>
) from the Ordovician of
<collectingCountry id="58C3760DFFCBFFC60F14FE65FC08FE34" box="[1067,1134,404,428]" name="China" pageId="61" pageNumber="62">China</collectingCountry>
is distinguished by having a short dorsal septum with a thickened front and a weak median buttress.
<bibRefCitation id="44454B6CFFCBFFC608D6FE46FCAFFE57" author="Sutton, M. D. &amp; Bassett, M. G. &amp; Cherns, L." box="[1001,1225,439,464]" pageId="61" pageNumber="62" pagination="61 - 114" refId="ref79461" refString="Sutton, M. D., Bassett, M. G. &amp; Cherns, L. (2000) Lingulate brachiopods from the Lower Ordovician of the Anglo-Welsh Basin. Part 2. Monograph of the Palaeontographical Society, London, 154 (613), 61 - 114, pls. 9 - 23." type="journal article" year="2000">
Sutton
<emphasis id="12A0EA8FFFCBFFC60F04FE48FC09FE48" box="[1083,1135,440,464]" italics="true" pageId="61" pageNumber="62">et al</emphasis>
. (2000)
</bibRefCitation>
described a
<taxonomicName id="E7D44D1EFFCBFFC60E63FE49F8ADFE6C" authorityName="Biernat" authorityYear="1973" class="Lingulata" family="Acrotretidae" genus="Semitreta" higherTaxonomySource="GBIF" kingdom="Animalia" order="Acrotretida" pageId="61" pageNumber="62" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFCBFFC60E63FE49F8ADFE6C" italics="true" pageId="61" pageNumber="62">Semitreta</emphasis>
</taxonomicName>
? sp. from the Tremadocian and Floian of
<collectingCountry id="58C3760DFFCBFFC609A1FE2DFB57FE6C" box="[670,817,476,500]" name="United Kingdom" pageId="61" pageNumber="62">Great Britain</collectingCountry>
that differs by having an apsacline ventral pseudointerarea with a weak intertrough.
</paragraph>
<paragraph id="206B369DFFCBFFC60BF8FDD2FC15FDC7" blockId="61.[151,1436,151,608]" pageId="61" pageNumber="62">
<emphasis id="12A0EA8FFFCBFFC60BF8FDD2F93FFDA4" bold="true" box="[199,345,547,572]" inLineHeading="true" pageId="61" pageNumber="62" reason="1">Occurrence.</emphasis>
Uppermost beds of Nordporten Member, Kirtonryggen Formation and basal bed of Olenidsletta Member, Valhallfonna Formation, Basissletta in northeastern Ny Friesland, Spitsbergen.
</paragraph>
</subSubSection>
</treatment>
</document>
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