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<document id="617621CC35CD71E1C1C178BFB36B88FB" 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="A87D878BFFD2FFDF0BA8FF66FC6EFAB6" 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="Mirilingula Popov 1983" docType="treatment" docVersion="3" lastPageNumber="37" masterDocId="5444FFF3FFF6FFFB0B3FFFF1F866FF98" masterDocTitle="Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076" masterLastPageNumber="122" masterPageNumber="1" pageNumber="37" updateTime="1699105918309" updateUser="plazi" zenodo-license-document="CLOSED">
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<mods:title id="7487785345616FBDE1A8F9CA5612FFAC">Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076</mods:title>
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<mods:namePart id="7FD0A1132C474F7402EE8106236712D5">Hansen, Jesper</mods:namePart>
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<mods:namePart id="E4BBBCFBB06F2A1CC67EA6D4330AE1C7">Holmer, Lars E.</mods:namePart>
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<mods:number id="46681327FEB368FC8878FC68FF158436">2011-10-28</mods:number>
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<treatment id="A87D878BFFD2FFDF0BA8FF66FC6EFAB6" LSID="urn:lsid:plazi:treatment:A87D878BFFD2FFDF0BA8FF66FC6EFAB6" httpUri="http://treatment.plazi.org/id/A87D878BFFD2FFDF0BA8FF66FC6EFAB6" lastPageNumber="37" pageId="36" pageNumber="37">
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<paragraph id="206B369DFFD2FFDF0BA8FF66FA26FF29" blockId="36.[151,576,151,210]" box="[151,576,151,177]" pageId="36" pageNumber="37">
<heading id="7B2381F1FFD2FFDF0BA8FF66FA26FF29" bold="true" box="[151,576,151,177]" fontSize="11" level="1" pageId="36" pageNumber="37" reason="1">
<emphasis id="12A0EA8FFFD2FFDF0BA8FF66FA26FF29" bold="true" box="[151,576,151,177]" pageId="36" pageNumber="37">
<taxonomicName id="E7D44D1EFFD2FFDF0BA8FF66F945FF29" authorityName="Popov" authorityYear="1983" box="[151,291,151,177]" class="Lingulata" family="Lingulellotretidae" genus="Mirilingula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="36" pageNumber="37" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFD2FFDF0BA8FF66F945FF29" bold="true" box="[151,291,151,177]" italics="true" pageId="36" pageNumber="37">Mirilingula</emphasis>
</taxonomicName>
?
<emphasis id="12A0EA8FFFD2FFDF0A06FF66F9BAFF29" bold="true" box="[313,476,151,177]" italics="true" pageId="36" pageNumber="37">svalbardensis</emphasis>
sp. nov.
</emphasis>
</heading>
</paragraph>
<paragraph id="206B369DFFD2FFDF0BA8FF4BFA73FF4A" blockId="36.[151,576,151,210]" box="[151,533,186,210]" pageId="36" pageNumber="37">
Pl. 6, Figs. 12–20; Pl. 7,
<figureCitation id="B8EF2A18FFD2FFDF0A93FF4BFA73FF4A" box="[428,533,186,210]" captionStart-0="FIGURE 1" captionStart-1="FIGURE 2" captionStart-2="FIGURE 3" captionStartId-0="6.[151,244,1307,1328]" captionStartId-1="9.[151,244,1919,1940]" captionStartId-2="10.[151,244,1646,1667]" captionTargetBox-0="[152,1436,331,1294]" captionTargetBox-1="[174,1423,157,1906]" captionTargetBox-2="[173,1417,393,1624]" captionTargetId-0="figure-359@6.[151,1436,331,1295]" captionTargetId-1="figure-80@9.[174,1426,157,1906]" captionTargetId-2="figure-209@10.[173,1417,374,1632]" captionTargetPageId-0="6" captionTargetPageId-1="9" captionTargetPageId-2="10" captionText-0="FIGURE 1 Locality maps of the Svalbard Archipelago. a) Locations of sites yielding Lower Palaeozoic fossils mentioned in this paper. b) Geological map of the Basissletta plain, northeastern Ny Friesland; redrawn from Fortey &amp; Bruton (1973). The base map is based on aerial photos made available by the Norwegian Polar Institute and on field observations made by the authors in 2008." captionText-1="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)." captionText-2="FIGURE 3 Rose histograms for the umbonal orientation of the large brachiopod Ectenoglossa? oviforma sp. nov. found in the Olenidsletta Member, Valhallfonna Formation. a) Histogram of 58 specimens from 88 m above the base of the member. b) Histogram of 13 specimens from 94 m above the base of the member." figureDoi-0="http://doi.org/10.5281/zenodo.5243502" figureDoi-1="http://doi.org/10.5281/zenodo.5243504" figureDoi-2="http://doi.org/10.5281/zenodo.5243508" httpUri-0="https://zenodo.org/record/5243502/files/figure.png" httpUri-1="https://zenodo.org/record/5243504/files/figure.png" httpUri-2="https://zenodo.org/record/5243508/files/figure.png" pageId="36" pageNumber="37">Figs. 1–3</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFD2FFDF0BA8FEF3FB70FE82" box="[151,790,258,283]" pageId="36" pageNumber="37" type="description">
<paragraph id="206B369DFFD2FFDF0BA8FEF3FB70FE82" blockId="36.[151,1437,258,1327]" box="[151,790,258,283]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BA8FEF3F9E2FE83" bold="true" box="[151,388,258,283]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Derivation of name.</emphasis>
Refers to the
<collectingCountry id="58C3760DFFD2FFDF091EFEF3FAE2FE82" box="[545,644,258,282]" name="Svalbard and Jan Mayen" pageId="36" pageNumber="37">Svalbard</collectingCountry>
archipelago.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFD2FFDF0BF8FED6F94FFE56" pageId="36" pageNumber="37" type="materials_examined">
<paragraph id="206B369DFFD2FFDF0BF8FED6FD17FEFA" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<materialsCitation id="90BC3CC0FFD2FFDF0BF8FED6FD17FEFA" collectionCode="TSGF" elevation="21" pageId="36" pageNumber="37" specimenCode="TSGF16969" specimenCount="1" typeStatus="holotype">
<emphasis id="12A0EA8FFFD2FFDF0BF8FED6F95DFEA7" bold="true" box="[199,315,295,319]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">
<typeStatus id="FF6F883FFFD2FFDF0BF8FED6F950FEA7" box="[199,310,295,319]" pageId="36" pageNumber="37" type="holotype">Holotype</typeStatus>
.
</emphasis>
Pl. 6, Figs. 19–20;
<specimenCode id="70729EE6FFD2FFDF0928FED7FAC3FEA6" box="[535,677,294,318]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16969</specimenCode>
, ventral valve fragment;
<quantity id="E72C9B78FFD2FFDF0882FED7FB90FEA6" box="[957,1014,294,318]" metricMagnitude="1" metricUnit="m" metricValue="2.1" pageId="36" pageNumber="37" unit="m" value="21.0">
<elevation id="ABF9D1AEFFD2FFDF0882FED7FB90FEA6" box="[957,1014,294,318]" metricMagnitude="1" metricUnit="m" metricValue="2.1" pageId="36" pageNumber="37" unit="m" value="21.0">21 m</elevation>
</quantity>
above base of Profilbekken Member, Valhallfonna Formation, sample JH-23; Profilbekken meltwater stream, Basissletta, Ny Friesland, Spitsbergen.
</materialsCitation>
</paragraph>
<paragraph id="206B369DFFD2FFDF0BF8FE9FF94FFE56" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BF8FE9FF950FE1F" bold="true" box="[199,310,366,391]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Material.</emphasis>
Eight fragments of dorsal valves and 11 fragments of ventral valves from the sample with
<accessionNumber id="3F87AB7EFFD2FFDF0E7DFE9FFDFAFE1E" box="[1346,1436,366,390]" httpUri="https://www.ebi.ac.uk/ena/browser/api/embl/A84363" pageId="36" pageNumber="37" type="EnaNcbi">A84363</accessionNumber>
and from samples JH-23 and JH-136. The
<typeStatus id="FF6F883FFFD2FFDF0946FE62FA82FE33" box="[633,740,403,427]" pageId="36" pageNumber="37" type="paratype">paratypes</typeStatus>
are
<materialsCitation id="90BC3CC0FFD2FFDF0829FE63FBC1FE32" box="[790,935,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37" specimenCode="TSGF16968" specimenCount="1">
<specimenCode id="70729EE6FFD2FFDF0829FE63FBC5FE32" box="[790,931,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16968</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFD2FFDF0890FE63FC26FE32" box="[943,1088,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37" specimenCode="TSGF16971" specimenCount="1">
<specimenCode id="70729EE6FFD2FFDF0890FE63FC5AFE32" box="[943,1084,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16971</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFD2FFDF0F77FE63FCBFFE32" box="[1096,1241,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37" specimenCode="TSGF16972" specimenCount="1">
<specimenCode id="70729EE6FFD2FFDF0F77FE63FCB3FE32" box="[1096,1237,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16972</specimenCode>
,
</materialsCitation>
<materialsCitation id="90BC3CC0FFD2FFDF0FDEFE63FDFAFE32" box="[1249,1436,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37" specimenCode="TSGF16978" specimenCount="1">
<specimenCode id="70729EE6FFD2FFDF0FDEFE63FD0DFE32" box="[1249,1387,402,426]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16978</specimenCode>
and
</materialsCitation>
<materialsCitation id="90BC3CC0FFD2FFDF0BA8FE47F943FE56" box="[151,293,438,462]" collectionCode="TSGF" pageId="36" pageNumber="37" specimenCode="TSGF16979" specimenCount="1">
<specimenCode id="70729EE6FFD2FFDF0BA8FE47F943FE56" box="[151,293,438,462]" collectionCode="TSGF" pageId="36" pageNumber="37">TSGF16979</specimenCode>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFD2FFDF0BF8FE2BF8A5FDA2" pageId="36" pageNumber="37" type="diagnosis">
<paragraph id="206B369DFFD2FFDF0BF8FE2BF8A5FDA2" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BF8FE2BF927FE6B" bold="true" box="[199,321,474,499]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Diagnosis.</emphasis>
Lingulellotretid with strongly acuminate ventral valve and strong ventral flexure lines; undivided and highly elevated dorsal pseudointerarea; unthickened visceral areas; a low, thin dorsal median ridge; and no sulcus.
</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFD2FFDF0BF8FDB7FDE7FB96" pageId="36" pageNumber="37" type="description">
<paragraph id="206B369DFFD2FFDF0BF8FDB7FA56FD3E" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BF8FDB7F93EFDC7" bold="true" box="[199,344,582,607]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Description.</emphasis>
Shell slightly dorsibiconvex, strongly unequivalved and rather thin-walled. Posterior margins of ventral valve diverging at about 45–50˚. Postlarval ornamentation consisting of growth lines. Micro-ornamentation absent on larval and postlarval shell.
</paragraph>
<paragraph id="206B369DFFD2FFDF0BF8FD43FAC1FCAE" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">Dorsal umbo broadly rounded with partly resorbed larval shell. Valve slightly to moderately convex in lateral profile, elongate-oval to triangular in outline. Pseudointerarea orthocline, highly elevated above and completely separated from valve floor. Pseudointerarea lacking flexure lines and median groove, covered with strong growth lines. Valve floor with scattered, coarse pitting.</paragraph>
<paragraph id="206B369DFFD2FFDF0BF8FCB3FDE7FB96" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">Ventral valve slightly convex and strongly acuminate, subtriangular or egg-shaped, with slightly emarginated umbo. Pseudointerarea orthocline, long, highly elevated above and completely separated from valve floor. Central part of pseudointerarea slightly lower than lateral parts. Flexure lines distinct and nearly straight. Growth lines strongly developed on pseudointerarea, curving posteriorly near pedicle groove. Pedicle groove deep, partly covered in posterior one-half to two-thirds of its length, becoming completely covered in anterior one-third to one-half of its length, where a pedicle tube forms on the valve floor. Pedicle slit pointed anteriorly. Visceral area obscure.</paragraph>
</subSubSection>
<subSubSection id="68CE6516FFD2FFDF0BF8FBEAFC6EFAB6" pageId="36" pageNumber="37" type="discussion">
<paragraph id="206B369DFFD2FFDF0BF8FBEAFA64FB7F" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BF8FBEAF95DFBAB" bold="true" box="[199,315,1051,1075]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Remarks.</emphasis>
<taxonomicName id="E7D44D1EFFD2FFDF0A7BFBEAF9A3FBAB" authorityName="Popov" authorityYear="1983" box="[324,453,1051,1075]" class="Lingulata" family="Lingulellotretidae" genus="Mirilingula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="36" pageNumber="37" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFD2FFDF0A7BFBEAF9A3FBAB" box="[324,453,1051,1075]" italics="true" pageId="36" pageNumber="37">Mirilingula</emphasis>
</taxonomicName>
?
<emphasis id="12A0EA8FFFD2FFDF0AE4FBEAFA12FBAB" box="[475,628,1051,1075]" italics="true" pageId="36" pageNumber="37">svalbardensis</emphasis>
is the youngest known representative of the family
<taxonomicName id="E7D44D1EFFD2FFDF0FF2FBEBFDFFFBAA" authorityName="Koneva &amp; Popov" authorityYear="1983" box="[1229,1433,1050,1074]" class="Lingulata" family="Lingulellotretidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="36" pageNumber="37" phylum="Brachiopoda" rank="family">Lingulellotretidae</taxonomicName>
.
<taxonomicName id="E7D44D1EFFD2FFDF0BA8FBCFF97EFBCE" authorityName="Popov" authorityYear="1983" box="[151,280,1086,1110]" class="Lingulata" family="Lingulellotretidae" genus="Mirilingula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="36" pageNumber="37" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFD2FFDF0BA8FBCFF97EFBCE" box="[151,280,1086,1110]" italics="true" pageId="36" pageNumber="37">Mirilingula</emphasis>
</taxonomicName>
has not previously been recorded from strata younger than the Tremadocian. The species is here assigned to
<taxonomicName id="E7D44D1EFFD2FFDF0A1FFB92F9C7FBE3" authorityName="Popov" authorityYear="1983" box="[288,417,1123,1147]" class="Lingulata" family="Lingulellotretidae" genus="Mirilingula" higherTaxonomySource="GBIF" kingdom="Animalia" order="Lingulida" pageId="36" pageNumber="37" phylum="Brachiopoda" rank="genus">
<emphasis id="12A0EA8FFFD2FFDF0A1FFB92F9C7FBE3" box="[288,417,1123,1147]" italics="true" pageId="36" pageNumber="37">Mirilingula</emphasis>
</taxonomicName>
on the basis of its highly raised, undivided dorsal pseudointerarea, lack of visceral platforms, low dorsal median ridge, and general shell outline. However, the lack of a shallow sulcus in the dorsal and ventral valves and the presence of distinct flexure lines in the ventral pseudointerarea sets it apart from all other known species within the genus.
</paragraph>
<paragraph id="206B369DFFD2FFDF0BF8FB03FC6EFAB6" blockId="36.[151,1437,258,1327]" pageId="36" pageNumber="37">
<emphasis id="12A0EA8FFFD2FFDF0BF8FB03F93FFA93" bold="true" box="[199,345,1266,1291]" inLineHeading="true" pageId="36" pageNumber="37" reason="1">Occurrence.</emphasis>
95 and
<quantity id="E72C9B78FFD2FFDF0A8BFB03F98BFA92" box="[436,493,1266,1290]" metricMagnitude="1" metricUnit="m" metricValue="9.7" pageId="36" pageNumber="37" unit="m" value="97.0">97 m</quantity>
above base of Olenidsletta Member and
<quantity id="E72C9B78FFD2FFDF0883FB03FB93FA92" box="[956,1013,1266,1290]" metricMagnitude="1" metricUnit="m" metricValue="2.1" pageId="36" pageNumber="37" unit="m" value="21.0">21 m</quantity>
above base of Profilbekken Member, Valhallfonna Formation, Basissletta in northeastern Ny Friesland, Spitsbergen.
</paragraph>
</subSubSection>
</treatment>
</document>
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