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<document id="5D9A713631344D0DE0F3F1A43E21E7AB" ID-DOI="10.11646/phytotaxa.150.1.2" ID-ISSN="1179-3163" ID-Zenodo-Dep="5100493" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1626238238611" checkinUser="felipe" docAuthor="Gong, Zhijun, Li, Yanling, Metzeltin, Ditmar &amp; Lange-Bertalot, Horst" docDate="2013" docId="905D4619FFCBFFE1FF726F90FD85F8F2" docLanguage="en" docName="Phytotaxa.150.1.29-40.pdf" docOrigin="Phytotaxa 150 (1)" docSource="http://dx.doi.org/10.11646/phytotaxa.150.1.2" docStyle="DocumentStyle:13F189B31CB4CCCE9197361A4E100104.3:Phytotaxa.2011-2013.journal_article" docStyleId="13F189B31CB4CCCE9197361A4E100104" docStyleName="Phytotaxa.2011-2013.journal_article" docStyleVersion="3" docTitle="Placoneis sinensis Li &amp; Metzeltin 2013, sp. nov." docType="treatment" docVersion="3" lastPageNumber="37" masterDocId="6C643E61FFCDFFE9FFE56916FFF9FF83" masterDocTitle="New species of Cymbella and Placoneis (Bacillariophyta) from late Pleistocene Fossil, China" masterLastPageNumber="40" masterPageNumber="29" pageNumber="35" updateTime="1699006816206" updateUser="plazi" zenodo-license-document="CLOSED">
<mods:mods id="CD34183E78CE67826B8C212EC6571A09" xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:title id="5C3657FCCE8C4079C17F6E696C28690D">New species of Cymbella and Placoneis (Bacillariophyta) from late Pleistocene Fossil, China</mods:title>
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<mods:name id="9843BA0F2EE19D27FE18935F9391D546" type="personal">
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<mods:namePart id="6B768D752DE970C9BC3641EE12A1B1D9">Gong, Zhijun</mods:namePart>
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<mods:namePart id="236A2689A120B5BA40EDADFA5D38F140">Li, Yanling</mods:namePart>
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<mods:namePart id="E0EA139BB713AF3671B748F40DB727DD">Metzeltin, Ditmar</mods:namePart>
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<mods:namePart id="2989AA5BA548249CC25809A1D8D62EBE">Lange-Bertalot, Horst</mods:namePart>
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<mods:title id="4FE5154D8E48D5185731ECCB7831FAD9">Phytotaxa</mods:title>
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<mods:date id="73EF22835E600AE6214AEC320569E2E5">2013</mods:date>
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<mods:number id="04ECAC46FCF1D8EF212713E24142817C">2013-12-03</mods:number>
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<mods:url id="063AA4E6B99BA3400915EB46ACF45363">http://dx.doi.org/10.11646/phytotaxa.150.1.2</mods:url>
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<mods:identifier id="C3484E4DDF4FDBBA18B7540DFE186820" type="ISSN">1179-3163</mods:identifier>
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<treatment id="905D4619FFCBFFE1FF726F90FD85F8F2" LSID="urn:lsid:plazi:treatment:905D4619FFCBFFE1FF726F90FD85F8F2" httpUri="http://treatment.plazi.org/id/905D4619FFCBFFE1FF726F90FD85F8F2" lastPageId="8" lastPageNumber="37" pageId="6" pageNumber="35">
<subSubSection id="50EEA484FFCBFFEFFF726F90FD7AF923" box="[151,643,1670,1697]" pageId="6" pageNumber="35" type="nomenclature">
<paragraph id="184BF70FFFCBFFEFFF726F90FD7AF923" blockId="6.[151,643,1670,1697]" box="[151,643,1670,1697]" pageId="6" pageNumber="35">
<heading id="43034063FFCBFFEFFF726F90FD7AF923" box="[151,643,1670,1697]" fontSize="11" level="2" pageId="6" pageNumber="35" reason="3">
<taxonomicName id="DFF48C8CFFCBFFEFFF726F90FDDBF922" authority="Li &amp; Metzeltin" authorityName="Li &amp; Metzeltin" authorityYear="2013" box="[151,546,1670,1697]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="6" pageNumber="35" phylum="Ochrophyta" rank="species" species="sinensis" status="sp. nov.">
<emphasis id="2A802B1DFFCBFFEFFF726F90FE96F923" bold="true" box="[151,367,1670,1696]" italics="true" pageId="6" pageNumber="35">Placoneis sinensis</emphasis>
Li &amp; Metzeltin
</taxonomicName>
<emphasis id="2A802B1DFFCBFFEFFDCF6F91FD7AF923" box="[554,643,1671,1696]" italics="true" pageId="6" pageNumber="35">
<taxonomicNameLabel id="31B39666FFCBFFEFFDCF6F91FD7AF923" box="[554,643,1671,1696]" pageId="6" pageNumber="35" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="50EEA484FFCBFFE1FF726FB8FD85F8F2" lastPageId="8" lastPageNumber="37" pageId="6" pageNumber="35" type="description">
<paragraph id="184BF70FFFCBFFEFFF726FB8FBCDF94B" blockId="6.[151,1076,1710,1736]" box="[151,1076,1710,1736]" pageId="6" pageNumber="35">
<figureCitation id="80CFEB8AFFCBFFEFFF726FB8FF13F94B" box="[151,234,1710,1736]" captionStart="PLATE 6" captionStartId="8.[151,229,1472,1493]" captionTargetBox="[365,1226,201,1441]" captionTargetId="figure-188@8.[353,1234,191,1451]" captionTargetPageId="8" captionText="PLATE 6, Figures 40–43: Placoneis sinensis Li &amp; Metzeltin sp. nov. Light microscopy images showing the range of variation within the type population. Figure 40. SEM, external valve." figureDoi="http://doi.org/10.5281/zenodo.5100507" httpUri="https://zenodo.org/record/5100507/files/figure.png" pageId="6" pageNumber="35">Plate 6</figureCitation>
, Figures 40–43;
<typeStatus id="C74F49ADFFCBFFEFFE4B6FB8FDEDF94B" box="[430,532,1710,1736]" pageId="6" pageNumber="35" type="holotype">holotype</typeStatus>
specimens is represented in plate 5, figure 40.
</paragraph>
<paragraph id="184BF70FFFCBFFEFFF726FE4FB8FF877" blockId="6.[151,1436,1778,2036]" pageId="6" pageNumber="35">
Description: Valves broadly elliptical with slightly protracted, bluntly rounded ends. Length
<quantity id="DF0C5AEAFFCBFFEFFAF26FE4FA6FF88F" box="[1303,1430,1778,1804]" metricMagnitude="-2" metricUnit="m" metricValue="6.1" metricValueMax="7.8" metricValueMin="4.4" pageId="6" pageNumber="35" unit="mm" value="61.0" valueMax="78.0" valueMin="44.0">44–78 µm</quantity>
, breadth
<quantity id="DF0C5AEAFFCBFFEFFF1C6E0EFE8EF8B1" box="[249,375,1816,1842]" metricMagnitude="-2" metricUnit="m" metricValue="2.4" metricValueMax="2.7" metricValueMin="2.1" pageId="6" pageNumber="35" unit="mm" value="24.0" valueMax="27.0" valueMin="21.0">21–27 µm</quantity>
. Axial area weakly linear-lanceolate. Central area large, elliptic-rhombic, or irregularlyshaped, because of irregularly alternating shorter and longer striae. Raphe filiform, central ends appearing expanded with comparatively widely spaced central pores. Terminal fissures subapically deflected to opposite sides, but finally curved to the same side. Striae radiate throughout, 7–11/
<quantity id="DF0C5AEAFFCBFFEFFC106E9AFBBAF825" box="[1013,1091,1932,1958]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="6" pageNumber="35" unit="mm" value="10.0">10 µm</quantity>
, composed of a single row of densely spaced areolae about 17–19/
<quantity id="DF0C5AEAFFCBFFEFFDB96EA5FD56F84E" box="[604,687,1971,1997]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="6" pageNumber="35" unit="mm" value="10.0">10 µm</quantity>
. Raphe fissures almost are straight with central ends faintly expanded, and scarcely discernible gently inclined to the secondary side (Figure 43).
</paragraph>
<caption id="4C8BA787FFCAFFEEFF726CD6FCAAF993" ID-DOI="http://doi.org/10.5281/zenodo.5100505" ID-Zenodo-Dep="5100505" httpUri="https://zenodo.org/record/5100505/files/figure.png" pageId="7" pageNumber="36" startId="7.[151,231,1472,1493]" targetBox="[359,1226,199,1447]" targetPageId="7">
<paragraph id="184BF70FFFCAFFEEFF726CD6FCAAF993" blockId="7.[151,1436,1472,1552]" pageId="7" pageNumber="36">
<emphasis id="2A802B1DFFCAFFEEFF726CD6FEF9FA56" bold="true" box="[151,256,1472,1493]" pageId="7" pageNumber="36">PLATE 5,</emphasis>
Figures 37–39: External valve view of
<taxonomicName id="DFF48C8CFFCAFFEEFD746CD6FC50FA56" authorityName="Li" authorityYear="2013" box="[657,937,1472,1493]" class="Bacillariophyceae" family="Cymbellaceae" genus="Cymbopleura" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="7" pageNumber="36" phylum="Ochrophyta" rank="species" species="jianghanensis">
<emphasis id="2A802B1DFFCAFFEEFD746CD6FC50FA56" box="[657,937,1472,1493]" italics="true" pageId="7" pageNumber="36">Cymbopleura jianghanensis</emphasis>
</taxonomicName>
in SEM, Figure 37. External valve view in SEM, Figure 38. External view of the central area showing the proximal dorsally bent raphe endings. Figure 39. External view of the valve end with the dorsally bent terminal raphe end. Scale bar represents 1 µm.
</paragraph>
</caption>
<paragraph id="184BF70FFFCAFFEEFF236F2CFA63F9D7" blockId="7.[151,1440,1594,2010]" box="[198,1434,1594,1620]" pageId="7" pageNumber="36">
<materialsCitation id="A89CFD52FFCAFFEEFF236F2CFA63F9D7" box="[198,1434,1594,1620]" collectionCode="CAS" country="China" county="Nanjing" location="Museum of Nanjing Institute" municipality="Limnology" pageId="7" pageNumber="36" specimenCount="1" typeStatus="holotype">
<typeStatus id="C74F49ADFFCAFFEEFF236F2CFEC1F9D7" box="[198,312,1594,1620]" pageId="7" pageNumber="36" type="holotype">Holotype</typeStatus>
: JH 91010-3,
<location id="1D2BA1D4FFCAFFEEFE3E6F2CFCD7F9D7" LSID="urn:lsid:plazi:treatment:905D4619FFCBFFE1FF726F90FD85F8F2:1D2BA1D4FFCAFFEEFE3E6F2CFCD7F9D7" box="[475,814,1594,1620]" country="China" county="Nanjing" municipality="Limnology" name="Museum of Nanjing Institute" pageId="7" pageNumber="36">
Museum of
<location id="1D2BA1D4FFCAFFEEFD8C6F2CFCD7F9D7" LSID="urn:lsid:plazi:treatment:905D4619FFCBFFE1FF726F90FD85F8F2:1D2BA1D4FFCAFFEEFD8C6F2CFCD7F9D7" box="[617,814,1594,1620]" country="China" county="Nanjing" municipality="Limnology" name="Nanjing Institute of Geography" pageId="7" pageNumber="36">Nanjing Institute</location>
</location>
of Geography and
<collectingMunicipality id="F82F6D75FFCAFFEEFBF56F2CFB6AF9D7" box="[1040,1171,1594,1620]" pageId="7" pageNumber="36">Limnology</collectingMunicipality>
,
<collectionCode id="7EE56FCAFFCAFFEEFB7A6F2CFB22F9D7" box="[1183,1243,1594,1620]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="7" pageNumber="36" type="Museum">CAS</collectionCode>
,
<collectingCounty id="F12A8F83FFCAFFEEFB026F2CFAB0F9D7" box="[1255,1353,1594,1620]" pageId="7" pageNumber="36">Nanjing</collectingCounty>
,
<collectingCountry id="60E3B79FFFCAFFEEFAB16F2CFA63F9D7" box="[1364,1434,1594,1620]" name="China" pageId="7" pageNumber="36">China</collectingCountry>
</materialsCitation>
</paragraph>
<paragraph id="184BF70FFFCAFFEEFF236F72FBF6F9FD" blockId="7.[151,1440,1594,2010]" box="[198,1039,1632,1662]" pageId="7" pageNumber="36">
<materialsCitation id="A89CFD52FFCAFFEEFF236F72FBF2F9FD" box="[198,1035,1632,1662]" latitude="30.188332" location="Jianghan Palin" longLatPrecision="20" longitude="112.5925" pageId="7" pageNumber="36" specimenCount="1" stateProvince="Hubei">
Type locality:
<location id="1D2BA1D4FFCAFFEEFE8A6F72FDE4F9FD" LSID="urn:lsid:plazi:treatment:905D4619FFCBFFE1FF726F90FD85F8F2:1D2BA1D4FFCAFFEEFE8A6F72FDE4F9FD" box="[367,541,1636,1662]" latitude="30.188332" longLatPrecision="20" longitude="112.5925" name="Jianghan Palin" pageId="7" pageNumber="36" stateProvince="Hubei">Jianghan Palin</location>
,
<collectingRegion id="DA3039EDFFCAFFEEFDCC6F72FD88F9FD" box="[553,625,1636,1662]" country="China" name="Hubei" pageId="7" pageNumber="36">Hubei</collectingRegion>
Provice.
<geoCoordinate id="7DC091C8FFCAFFEEFD046F72FC90F9FD" box="[737,873,1632,1662]" degrees="30" direction="north" minutes="11" orientation="latitude" pageId="7" pageNumber="36" precision="15" seconds="18" value="30.188332">
30
<superScript id="EF815A47FFCAFFEEFD1B6F76FCFFF9ED" attach="none" box="[766,774,1632,1646]" fontSize="6" pageId="7" pageNumber="36">o</superScript>
11
<superScript id="EF815A47FFCAFFEEFCC76F76FCDEF9ED" attach="none" box="[802,807,1632,1646]" fontSize="6" pageId="7" pageNumber="36">’</superScript>
18”N
</geoCoordinate>
,
<geoCoordinate id="7DC091C8FFCAFFEEFC906F72FBF2F9FD" box="[885,1035,1632,1662]" degrees="112" direction="east" minutes="35" orientation="longitude" pageId="7" pageNumber="36" precision="15" seconds="33" value="112.5925">
112
<superScript id="EF815A47FFCAFFEEFC456F76FC51F9ED" attach="none" box="[928,936,1632,1646]" fontSize="6" pageId="7" pageNumber="36">o</superScript>
35
<superScript id="EF815A47FFCAFFEEFC236F76FC32F9ED" attach="right" box="[966,971,1632,1646]" fontSize="6" pageId="7" pageNumber="36">’</superScript>
33”E
</geoCoordinate>
</materialsCitation>
.
</paragraph>
<paragraph id="184BF70FFFCAFFEEFF236F9CFCCAF927" blockId="7.[151,1440,1594,2010]" box="[198,819,1674,1700]" pageId="7" pageNumber="36">
Etymology: The Latin name
<taxonomicName id="DFF48C8CFFCAFFEEFDFC6F9CFD8FF920" authorityName="Li &amp; Metzeltin" authorityYear="2013" box="[537,630,1674,1699]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="7" pageNumber="36" phylum="Ochrophyta" rank="species" species="sinensis">
<emphasis id="2A802B1DFFCAFFEEFDFC6F9CFD8FF920" box="[537,630,1674,1699]" italics="true" pageId="7" pageNumber="36">sinensis</emphasis>
</taxonomicName>
refers to
<collectingCountry id="60E3B79FFFCAFFEEFD006F9CFCD6F927" box="[741,815,1674,1700]" name="China" pageId="7" pageNumber="36">China</collectingCountry>
.
</paragraph>
<paragraph id="184BF70FFFCAFFEEFF236FA7FE91F8E5" blockId="7.[151,1440,1594,2010]" pageId="7" pageNumber="36">
Differential diagnosis: Distinguished from all species of the
<taxonomicName id="DFF48C8CFFCAFFEEFC706FA7FA62F948" authority="Miho &amp; Lange-Bertalot (2006: 27)" authorityName="Miho &amp; Lange-Bertalot" authorityPageNumber="27" authorityYear="2006" box="[917,1435,1712,1739]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="7" pageNumber="36" phylum="Ochrophyta" rank="species" species="juriljii">
<emphasis id="2A802B1DFFCAFFEEFC706FA7FC07F949" box="[917,1022,1712,1738]" italics="true" pageId="7" pageNumber="36">P. juriljii</emphasis>
Miho &amp; Lange-Bertalot (2006:27)
</taxonomicName>
by size of valve and lacking stigmata near the central nodule. Miho and Lange-Bertalot (2006) described
<taxonomicName id="DFF48C8CFFCAFFEEFA636FCEFF1BF894" authorityName="Miho &amp; Lange-Bertalot" authorityYear="2006" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="7" pageNumber="36" phylum="Ochrophyta" rank="species" species="juriljii">
<emphasis id="2A802B1DFFCAFFEEFA636FCEFF1BF894" italics="true" pageId="7" pageNumber="36">P. juriljii</emphasis>
</taxonomicName>
with 2 stigmata near the central nodule and distinctly separated from the striae unilaterally, one or some additional stigma-like areolae occur closer to, but somewhat isolated from, the striae,
<quantity id="DF0C5AEAFFCAFFEEFB676E33FB0BF8BC" box="[1154,1266,1829,1855]" metricMagnitude="-2" metricUnit="m" metricValue="5.65" metricValueMax="7.3" metricValueMin="4.0" pageId="7" pageNumber="36" unit="mm" value="56.5" valueMax="73.0" valueMin="40.0">40–73µm</quantity>
in length,
<quantity id="DF0C5AEAFFCAFFEEFA956E33FF1AF8E5" metricMagnitude="-2" metricUnit="m" metricValue="1.8" metricValueMax="2.0" metricValueMin="1.6" pageId="7" pageNumber="36" unit="mm" value="18.0" valueMax="20.0" valueMin="16.0">16– 20 µm</quantity>
in breadth.
</paragraph>
<paragraph id="184BF70FFFCAFFEEFF236E64FCAFF859" blockId="7.[151,1440,1594,2010]" pageId="7" pageNumber="36">
Many more specimens also have been found in the Namsan and Malikha rivers, both in the north of
<collectingCountry id="60E3B79FFFCAFFEEFF726E8FFEF6F830" box="[151,271,1945,1971]" name="Myanmar" pageId="7" pageNumber="36">Myanmar</collectingCountry>
, near the city of Putao. Malikha is one of two source-rivers of the biggest Myanmar-river, the
<collectingRegion id="DA3039EDFFCAFFEEFF726ED6FED5F859" box="[151,300,1984,2010]" country="Myanmar" name="Ayeyawady" pageId="7" pageNumber="36">Ayeyarwady</collectingRegion>
. Specimens are shown in plate 7 (Figs. 44–49).
</paragraph>
<caption id="4C8BA787FFC5FFE1FF726CD6FD76FA70" ID-DOI="http://doi.org/10.5281/zenodo.5100507" ID-Zenodo-Dep="5100507" httpUri="https://zenodo.org/record/5100507/files/figure.png" pageId="8" pageNumber="37" startId="8.[151,229,1472,1493]" targetBox="[365,1226,201,1441]" targetPageId="8">
<paragraph id="184BF70FFFC5FFE1FF726CD6FD76FA70" blockId="8.[151,1436,1472,1523]" pageId="8" pageNumber="37">
<emphasis id="2A802B1DFFC5FFE1FF726CD6FF04FA56" bold="true" box="[151,253,1472,1493]" pageId="8" pageNumber="37">PLATE 6,</emphasis>
Figures 40–43:
<taxonomicName id="DFF48C8CFFC5FFE1FE7F6CD6FD1BFA55" authority="Li &amp; Metzeltin" authorityName="Li &amp; Metzeltin" authorityYear="2013" box="[410,738,1472,1494]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="sinensis" status="sp. nov.">
<emphasis id="2A802B1DFFC5FFE1FE7F6CD6FDB2FA56" box="[410,587,1472,1493]" italics="true" pageId="8" pageNumber="37">Placoneis sinensis</emphasis>
Li &amp; Metzeltin
</taxonomicName>
<emphasis id="2A802B1DFFC5FFE1FD0C6CD6FCCBFA56" box="[745,818,1472,1493]" italics="true" pageId="8" pageNumber="37">
<taxonomicNameLabel id="31B39666FFC5FFE1FD0C6CD6FCCBFA56" box="[745,818,1472,1493]" pageId="8" pageNumber="37" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
Light microscopy images showing the range of variation within the type population. Figure 40. SEM, external valve.
</paragraph>
</caption>
<paragraph id="184BF70FFFC5FFE1FF236F37FC6DF933" blockId="8.[151,1436,1569,1905]" pageId="8" pageNumber="37">
<taxonomicName id="DFF48C8CFFC5FFE1FF236F37FE64F9B8" authorityName="Li &amp; Metzeltin" authorityYear="2013" box="[198,413,1569,1595]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="sinensis">
<emphasis id="2A802B1DFFC5FFE1FF236F37FE64F9B8" box="[198,413,1569,1595]" italics="true" pageId="8" pageNumber="37">Placoneis sinensis</emphasis>
</taxonomicName>
is similar to
<taxonomicName id="DFF48C8CFFC5FFE1FDD36F37FBA8F9BF" authority="Hustedt (1966: 767)" authorityName="Hustedt" authorityPageNumber="767" authorityYear="1966" box="[566,1105,1569,1596]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Naviculales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="obtuseprotracta">
<emphasis id="2A802B1DFFC5FFE1FDD36F37FC98F9B8" box="[566,865,1569,1595]" italics="true" pageId="8" pageNumber="37">Navicula obtuseprotracta</emphasis>
Hustedt (1966:767)
</taxonomicName>
. This is a
<taxonomicName id="DFF48C8CFFC5FFE1FB206F37FA6EF9BF" box="[1221,1431,1569,1596]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="2A802B1DFFC5FFE1FB206F37FAC1F9B8" box="[1221,1336,1569,1595]" italics="true" pageId="8" pageNumber="37">Placoneis</emphasis>
species
</taxonomicName>
, found only as a fossil in the Columbia River,
<collectingRegion id="DA3039EDFFC5FFE1FD5C6F5FFCECF9E0" box="[697,789,1609,1635]" country="United States of America" name="Oregon" pageId="8" pageNumber="37">Oregon</collectingRegion>
,
<collectingCountry id="60E3B79FFFC5FFE1FCC76F5FFC8AF9E0" box="[802,883,1609,1635]" name="United States of America" pageId="8" pageNumber="37">U.S.A.</collectingCountry>
and remarkably similar but not the same. The data from Hustedt are: length
<quantity id="DF0C5AEAFFC5FFE1FE1C6F79FD8DF90A" box="[505,628,1647,1673]" metricMagnitude="-2" metricUnit="m" metricValue="6.6" metricValueMax="7.2" metricValueMin="6.0" pageId="8" pageNumber="37" unit="mm" value="66.0" valueMax="72.0" valueMin="60.0">60–72 µm</quantity>
, breadth
<quantity id="DF0C5AEAFFC5FFE1FD046F79FCA4F90A" box="[737,861,1647,1673]" metricMagnitude="-2" metricUnit="m" metricValue="2.5" metricValueMax="3.0" metricValueMin="2.0" pageId="8" pageNumber="37" unit="mm" value="25.0" valueMax="30.0" valueMin="20.0">20–30 µm</quantity>
; striae 9–10/
<quantity id="DF0C5AEAFFC5FFE1FC196F79FBB2F90A" box="[1020,1099,1647,1673]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="8" pageNumber="37" unit="mm" value="10.0">10 µm</quantity>
, near the poles c. 12, puncta 10–12/
<quantity id="DF0C5AEAFFC5FFE1FF0A6F80FEC7F933" box="[239,318,1686,1712]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="8" pageNumber="37" unit="mm" value="10.0">10 µm</quantity>
, near the axial area more dense about
<quantity id="DF0C5AEAFFC5FFE1FD1B6F80FCC0F933" box="[766,825,1686,1712]" metricMagnitude="-1" metricUnit="m" metricValue="4.064" pageId="8" pageNumber="37" unit="in" value="16.0">16 in</quantity>
<quantity id="DF0C5AEAFFC5FFE1FCA56F80FC69F933" box="[832,912,1686,1712]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="8" pageNumber="37" unit="mm" value="10.0">10 µm</quantity>
.
</paragraph>
<paragraph id="184BF70FFFC5FFE1FF236FAAFCCAF8A7" blockId="8.[151,1436,1569,1905]" pageId="8" pageNumber="37">
Length, breadth and stria of
<taxonomicName id="DFF48C8CFFC5FFE1FDC26FABFD5DF955" authorityName="Li &amp; Metzeltin" authorityYear="2013" box="[551,676,1725,1750]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="sinensis">
<emphasis id="2A802B1DFFC5FFE1FDC26FABFD5DF955" box="[551,676,1725,1750]" italics="true" pageId="8" pageNumber="37">P. sinensis</emphasis>
</taxonomicName>
and
<taxonomicName id="DFF48C8CFFC5FFE1FD006FABFC3FF955" authorityName="Hustedt" authorityYear="1966" box="[741,966,1724,1750]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Naviculales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="obtuseprotracta">
<emphasis id="2A802B1DFFC5FFE1FD006FABFC3FF955" box="[741,966,1724,1750]" italics="true" pageId="8" pageNumber="37">N. obtuseprotracta</emphasis>
</taxonomicName>
are very similar, only the densities of areolae are different. Our specimens differ the Hustedt’s taxon by broader apices. See my plate with photos of
<taxonomicName id="DFF48C8CFFC5FFE1FF726E1CFE8AF8A0" authorityName="Hustedt" authorityYear="1966" box="[151,371,1801,1827]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Naviculales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="species" species="obtuseprotracta">
<emphasis id="2A802B1DFFC5FFE1FF726E1CFE8AF8A0" box="[151,371,1801,1827]" italics="true" pageId="8" pageNumber="37">N. obtuseprotracta</emphasis>
</taxonomicName>
have been taken by
<bibRefCitation id="7C658AFEFFC5FFE1FD866E1CFCD6F8A7" author="SIMONSEN" box="[611,815,1802,1828]" pageId="8" pageNumber="37" refId="ref5633" refString="SIMONSEN, R. (1987) Atlas and Catalogue of the diatom types of Friedrich Hustedt. Vol. 1: Catalogue. p. 1 - 525. Vol. 2: Atlas, Taf. 1 - 395. Vol. 3: Atlas, Taf. 396 - 772. J. Cramer Berlin / Stuttgart." type="book" year="1987">Simonsen (1987)</bibRefCitation>
.
</paragraph>
<paragraph id="184BF70FFFC5FFE1FF236E27FD85F8F2" blockId="8.[151,1436,1569,1905]" pageId="8" pageNumber="37">
Given the comparison of our new
<taxonomicName id="DFF48C8CFFC5FFE1FDBB6E26FD28F8C9" authorityName="Mereschkowsky" authorityYear="1903" box="[606,721,1840,1866]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="genus">
<emphasis id="2A802B1DFFC5FFE1FDBB6E26FD28F8C9" box="[606,721,1840,1866]" italics="true" pageId="8" pageNumber="37">Placoneis</emphasis>
</taxonomicName>
to the
<taxonomicName id="DFF48C8CFFC5FFE1FCC36E26FC15F8C8" box="[806,1004,1840,1867]" class="Bivalvia" family="Arcidae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Arcida" pageId="8" pageNumber="37" phylum="Mollusca" rank="species" species="undetermined">
<emphasis id="2A802B1DFFC5FFE1FCC36E26FC69F8C9" box="[806,912,1840,1866]" italics="true" pageId="8" pageNumber="37">Navicula</emphasis>
species
</taxonomicName>
of Hustedt, we propose here a new combination from
<taxonomicName id="DFF48C8CFFC5FFE1FE946E40FE22F8F3" box="[369,475,1878,1904]" class="Bivalvia" family="Arcidae" genus="Navicula" higherTaxonomySource="CoL" kingdom="Animalia" order="Arcida" pageId="8" pageNumber="37" phylum="Mollusca" rank="genus">
<emphasis id="2A802B1DFFC5FFE1FE946E40FE22F8F3" box="[369,475,1878,1904]" italics="true" pageId="8" pageNumber="37">Navicula</emphasis>
</taxonomicName>
to
<taxonomicName id="DFF48C8CFFC5FFE1FDE56E40FD8AF8F3" authorityName="Mereschkowsky" authorityYear="1903" box="[512,627,1878,1904]" class="Bacillariophyceae" family="Cymbellaceae" genus="Placoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Cymbellales" pageId="8" pageNumber="37" phylum="Ochrophyta" rank="genus">
<emphasis id="2A802B1DFFC5FFE1FDE56E40FD8AF8F3" box="[512,627,1878,1904]" italics="true" pageId="8" pageNumber="37">Placoneis</emphasis>
</taxonomicName>
:
</paragraph>
</subSubSection>
</treatment>
</document>
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