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<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.228.101080" ID-Pensoft-Pub="1314-2003-228-1" ID-Pensoft-UUID="576A4D0BFA9A5B62B60571F9F54D9E9F" ModsDocID="1314-2003-228-1" checkinTime="1687555800880" checkinUser="pensoft" docAuthor="Liu, Bing" docDate="2023" docId="72D21C66FB8F5BF5802A8EE629318A23" docLanguage="en" docName="PhytoKeys 228: 1-118" docOrigin="PhytoKeys 228" docPubDate="2023-06-23" docSource="http://dx.doi.org/10.3897/phytokeys.228.101080" docTitle="Ulnaria xieriverensis Bing Liu 2023, sp. nov." docType="treatment" docVersion="1" id="576A4D0BFA9A5B62B60571F9F54D9E9F" lastPageNumber="1" masterDocId="576A4D0BFA9A5B62B60571F9F54D9E9F" masterDocTitle="The diatom genus Ulnaria (Bacillariophyta) in China" masterLastPageNumber="118" masterPageNumber="1" pageNumber="1" updateTime="1687555800880" updateUser="pensoft">
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<mods:title id="8564EBBFCF2673DD518E20E774DFB40B">The diatom genus Ulnaria (Bacillariophyta) in China</mods:title>
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<mods:name id="A12A6EB99F1762F9FC6B46CDE3482611" type="personal">
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<mods:namePart id="262F45949EE6D597C493CB8EF8A5DFB0">Liu, Bing</mods:namePart>
<mods:nameIdentifier id="688B879CB42DB227902AB34118211657" type="ORCID">https://orcid.org/0000-0002-8516-325X</mods:nameIdentifier>
<mods:affiliation id="B6A1C1B3CE82737B65AC9BF2442681F2">College of Biology and Environmental Sciences, Jishou University, Jishou 416000, China</mods:affiliation>
<mods:nameIdentifier id="9AD043AEABF18A69407DD76E9974DD38" type="email">jsulb@outlook.com</mods:nameIdentifier>
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<mods:date id="1D02CA0C0B68B2C3F66CF96E437D33B0">2023</mods:date>
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<mods:number id="62C84ACC3EC24EA9EA7900693D6DB1BC">2023-06-23</mods:number>
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<mods:classification id="193DCD4485817962451767DA2B2B2BF2">journal article</mods:classification>
<mods:identifier id="B0F3EEB707723BCE1B6A3B1B1719F88C" type="DOI">http://dx.doi.org/10.3897/phytokeys.228.101080</mods:identifier>
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<treatment id="72D21C66FB8F5BF5802A8EE629318A23" LSID="urn:lsid:plazi:treatment:72D21C66FB8F5BF5802A8EE629318A23" httpUri="http://treatment.plazi.org/id/72D21C66FB8F5BF5802A8EE629318A23" lastPageNumber="1" pageId="0" pageNumber="1">
<subSubSection id="2293695E5308EF2AE0FC5D1F99471D6C" pageId="0" pageNumber="1" type="nomenclature">
<paragraph id="97227FFEB62D8F382697AC695A943F2E" pageId="0" pageNumber="1">
<taxonomicName id="241B33E08F94F4FCA6E0BDF0EE28C953" LSID="72D21C66-FB8F-5BF5-802A-8EE629318A23" authority="Bing Liu" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" higherTaxonomySource="treatment-meta" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis" status="sp. nov.">Ulnaria xieriverensis Bing Liu</taxonomicName>
<taxonomicNameLabel id="BBC0BA823C6212B5B8316992FE47602D" pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="427A0A44158A353BE0E448EE2F6C5110" pageId="0" pageNumber="1" type="description">
<paragraph id="2567DF7047B96B1D6757800522F11690" pageId="0" pageNumber="1">
<figureCitation id="E3B0FB3580245E8E94046C7E3C3F7D6B" captionStart="Figure 73" captionStartId="F73" captionText="Figure 73. Ulnaria xieriverensis sp. nov., x 1000, LM A-H eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (A-C) and parallel valve margins in smaller specimens (D-H). A Micrograph of holotype specimen. Scale bar: 10 μm." figureDoi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1">Figs 73</figureCitation>
<figureCitation id="4263246E9C979A9D70DA81FE8729D5DA" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">, 74</figureCitation>
<figureCitation id="F8A529D68606B505F310AEF186E2EAE5" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">, 75</figureCitation>
<figureCitation id="9E47989E6F383D9AB87A3B530536B822" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">, 76</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="6AF9FA7A0AC3F23EEB82E2EED81B584D" pageId="0" pageNumber="1" type="holotype">
<paragraph id="484B003FD52A0AA43BD7EC8716020E8A" pageId="0" pageNumber="1">Holotype.</paragraph>
<paragraph id="844D6B982E031BD8AF17213F407C9E56" pageId="0" pageNumber="1">
Slide JIUDIA202313, specimen circled on slide, illustrated as Fig.
<figureCitation id="F9B9CEDF0B576A9D3B9BE1DE6298E0D0" captionStart="Figure 73" captionStartId="F73" captionText="Figure 73. Ulnaria xieriverensis sp. nov., x 1000, LM A-H eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (A-C) and parallel valve margins in smaller specimens (D-H). A Micrograph of holotype specimen. Scale bar: 10 μm." figureDoi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1">73A</figureCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="6ED2517578C88D0A8FB3E2F0AAA1E369" pageId="0" pageNumber="1" type="registration">
<paragraph id="207A660C023A2CF59FDA8BD69915A126" pageId="0" pageNumber="1">Registration.</paragraph>
<paragraph id="EB1FC7BBA003960996C0904078FA94EE" pageId="0" pageNumber="1">PhycoBank http://phycobank.org/103819.</paragraph>
</subSubSection>
<subSubSection id="478221E8B8E67BA38A341EB277FDF8A9" pageId="0" pageNumber="1" type="type locality">
<paragraph id="5D817E4654500BC9E846EA035EEB8222" pageId="0" pageNumber="1">Type locality.</paragraph>
<paragraph id="C34EF377A5AEF5E7E83066F99D78D3E4" pageId="0" pageNumber="1">
China. Hunan province: Huping Mountain National Nature Reserve, Xie River, a sampling location (
<geoCoordinate id="5AE2149A6228BF3A8FAF9213CC083393" degrees="30" direction="north" minutes="1" orientation="latitude" precision="15" seconds="9" value="30.019167">30°1'9&quot;N</geoCoordinate>
,
<geoCoordinate id="1F9D1AF3F8915479BB584D3640028486" degrees="110" direction="east" minutes="37" orientation="longitude" precision="15" seconds="46" value="110.62945">110°37'46&quot;E</geoCoordinate>
, 400 m a.s.l.), collected by Bing Liu, March 14, 2021.
</paragraph>
</subSubSection>
<subSubSection id="AB585D95DD754EEE9EE6F7E4DB71DC6A" pageId="0" pageNumber="1" type="description">
<paragraph id="24FF03E1131141D36D1E3A9AD2C66A0C" pageId="0" pageNumber="1">Description.</paragraph>
<paragraph id="699DE9AAEA9F0D4028E618C61196CC83" pageId="0" pageNumber="1">
<emphasis id="AA90ABC58270FA09427538D79243784F" bold="true" italics="true" pageId="0" pageNumber="1">LM</emphasis>
(Figs
<figureCitation id="166BAD9FD41D10A00EE78E49AE915A24" captionStart="Figure 73" captionStartId="F73" captionText="Figure 73. Ulnaria xieriverensis sp. nov., x 1000, LM A-H eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (A-C) and parallel valve margins in smaller specimens (D-H). A Micrograph of holotype specimen. Scale bar: 10 μm." figureDoi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1">73</figureCitation>
). Valves generally linear (i.e., valve margins almost parallel), slightly undulate in larger specimens (Fig.
<figureCitation id="AC69981999597F17679CDD42374F34C5" captionStart="Figure 73" captionStartId="F73" captionText="Figure 73. Ulnaria xieriverensis sp. nov., x 1000, LM A-H eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (A-C) and parallel valve margins in smaller specimens (D-H). A Micrograph of holotype specimen. Scale bar: 10 μm." figureDoi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1">73A-C</figureCitation>
, see also Fig.
<figureCitation id="748C948040ACE7ED3C3A1F5C4E088024" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76B, C</figureCitation>
), parallel in smaller specimens (Fig.
<figureCitation id="5520F80458AFEAFF7DAA01E8FBAF9741" captionStart="Figure 73" captionStartId="F73" captionText="Figure 73. Ulnaria xieriverensis sp. nov., x 1000, LM A-H eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (A-C) and parallel valve margins in smaller specimens (D-H). A Micrograph of holotype specimen. Scale bar: 10 μm." figureDoi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1">73D-H</figureCitation>
, see also Figs
<figureCitation id="6A7E5FC8269E545F50A224E89624770E" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">74A</figureCitation>
,
<figureCitation id="658FF4523459E1A6955A9C0F4F17A3E4" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">75A</figureCitation>
,
<figureCitation id="254E9A5B12116A8D20381AC4C06959AC" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76A</figureCitation>
). Valve tapers towards apex, then it is protracted to broadly rostrate poles. Valve dimensions (n = 33): length 64-120
<normalizedToken id="B916425E2FF5E3B36EE397C44EF7E4FF" originalValue="μm">μm</normalizedToken>
, width 6.0-8.6
<normalizedToken id="001341CC3744E35ADA06AC62305DFEB1" originalValue="μm">μm</normalizedToken>
at centre. Sternum distinct, extending length of valve. Central area completely absent. Striae parallel, radiate only approaching each pole, and mostly opposite one another across sternum. Stria density 10.5-12 (often 11) in 10
<normalizedToken id="EDE1EF615A857441DD2CF035D2DAC199" originalValue="μm">μm</normalizedToken>
.
</paragraph>
<caption id="E6FBF517599E2592923DB0C572ADCC4E" doi="10.3897/phytokeys.228.101080.figure73" httpUri="https://binary.pensoft.net/fig/867661" pageId="0" pageNumber="1" start="Figure 73" startId="F73">
<paragraph id="453CA91103D92CF1CA7C99D6306C6E6F" pageId="0" pageNumber="1">
<emphasis id="D17DDEC2BE56702AD95C6FD37C1D4D13" bold="true" pageId="0" pageNumber="1">Figure 73.</emphasis>
<taxonomicName id="031810EF7B05F938988B4B2D8B650EA7" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis">
<emphasis id="1C779970E150A2BF73194336FBC60EDF" italics="true" pageId="0" pageNumber="1">Ulnaria xieriverensis</emphasis>
</taxonomicName>
sp. nov.,
<normalizedToken id="5274FD8172288F288C58B5FA908CEEC0" originalValue="×">x</normalizedToken>
1000, LM
<emphasis id="34C0A103697CA76E7A2B1BE80D89BFCD" bold="true" pageId="0" pageNumber="1">A-H</emphasis>
eight valves exhibiting a size diminution series, note the almost parallel but slightly undulate valve margins in larger specimens (
<emphasis id="3F5532C9B12E6BDA90E38372A74C9220" bold="true" pageId="0" pageNumber="1">A-C</emphasis>
) and parallel valve margins in smaller specimens (
<emphasis id="F91890ACFA26DC8DFBCB419E74655A97" bold="true" pageId="0" pageNumber="1">D-H</emphasis>
).
<emphasis id="3155CE266E378B1E481C5764F8042015" bold="true" pageId="0" pageNumber="1">A</emphasis>
Micrograph of holotype specimen. Scale bar: 10
<normalizedToken id="DC40499B238793B205E218CEFA5DBAE1" originalValue="μm">μm</normalizedToken>
.
</paragraph>
</caption>
<paragraph id="EBE761840C4A0BBDB07597CBB68C3054" pageId="0" pageNumber="1">
<emphasis id="05C0E58433EB40DE582EE0943D41B919" bold="true" italics="true" pageId="0" pageNumber="1">SEM</emphasis>
(Figs
<figureCitation id="48260B774EAA1EB3DFCA384F1E0FA462" captionStart="Figure 69" captionStartId="F69" captionText="Figure 69. Ulnaria hupingensis sp. nov., girdle view, SEM A a frustule in girdle view B-E details from A, note three copulae (labelled B 1 to B 3) associated with the epivalve F apical detail from E, showing two horn-like projections (two arrows respectively). Scale bars: 20 μm (A); 2 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure69" httpUri="https://binary.pensoft.net/fig/867657" pageId="0" pageNumber="1">69</figureCitation>
-
<figureCitation id="6BA367A2F1537A172CC7BB37FC74BADE" captionStart="Figure 72" captionStartId="F72" captionText="Figure 72. Ulnaria hupingensis sp. nov., internal view, SEM A a complete valve B, C middle part details from A, note central area is completely absent D-F apical details from A. Scale bars: 20 μm (A); 2 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure72" httpUri="https://binary.pensoft.net/fig/867660" pageId="0" pageNumber="1">72</figureCitation>
). Valve characterized by relatively wide virgae, interconnected with vimines, closing plates affixed with a few struts to the areolar wall (Fig.
<figureCitation id="3282A60B30EFF8A6E5129DDCC075B9D0" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">74B-D</figureCitation>
). Ocellulimbus composed of ca. 16 pervalvar and 9 transverse rows of porelli. Two horn-like projections protruding over the ocellulimbus (Fig.
<figureCitation id="2D8FAD0EB92457E3ADF93560869E3424" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">74E, F</figureCitation>
, two arrows, respectively). Striae uniseriate. Stria situated opposite each other across sternum, equidistant until radiate at poles, areolae become elongated closer to the mantle (Fig.
<figureCitation id="61EC8C50BE36D53A343D423C5EEF57AB" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">75B-F</figureCitation>
). One rimoportula present at each pole, externally expressed as a simple hole (Fig.
<figureCitation id="F39AA44AEE59E45378CC5A90141A281A" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">74C-F</figureCitation>
), internally bilabiate, situated close to sternum (Fig.
<figureCitation id="68575696648D314A6778BDD672CA9581" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">75C, E, F</figureCitation>
), sometimes displaced, against mantle (Fig.
<figureCitation id="CE102F326896614043DBFD01D2916C27" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">75D</figureCitation>
). Central area completely lacking (Figs
<figureCitation id="844D765CF5C234B9F113951F746B2114" captionStart="Figure 74" captionStartId="F74" captionText="Figure 74. Ulnaria xieriverensis sp. nov., external view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A. E, F Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1">74A, B</figureCitation>
,
<figureCitation id="244AC1BDB886C8C4591D75F724EAEBB4" captionStart="Figure 75" captionStartId="F75" captionText="Figure 75. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve B middle part detail from A, note central area is completely absent C, D two apical details from A, note one rimoportula located against the mantle (D, arrow) E, F two other apical details. Scale bars: 10 μm (A); 1 μm (B-F)." figureDoi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1">75A, B</figureCitation>
,
<figureCitation id="07B86AF6713BB4F440E771367275725A" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76A-D</figureCitation>
). Valvocopula a closed hoop (Fig.
<figureCitation id="3A50C8DC7066AD85A659BA37B2408C96" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76A-C</figureCitation>
). Valvocopula bearing a mostly continuous row of poroids dividing pars interior from pars exterior, located at the midline (Fig.
<figureCitation id="36A7A7E42F7122505E0CF16C00D14395" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76D-F</figureCitation>
), lacking ornamentation at both poles (Fig.
<figureCitation id="AB04C58EDEAF0C5D0653B1ED65444610" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76E, F</figureCitation>
). On its advalvar edge, valvocopula has a row of serrated projections, each corresponding internally to a virga (Fig.
<figureCitation id="A71701DE200FBD348DCE3AC940A27A79" captionStart="Figure 76" captionStartId="F76" captionText="Figure 76. Ulnaria xieriverensis sp. nov., internal view, SEM A a complete valve with valvocopula B, C two complete valves with valvocopula, note undulate valve margins D middle detail from A, note the central area is completely absent and a row of serrated projections over virgae (three arrows) E, F two apical details from A, note serrated projections over virgae (E, three arrows). Scale bars: 10 μm (A-C); 1 μm (D-F)." figureDoi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1">76D, E</figureCitation>
, three arrows, respectively).
</paragraph>
<caption id="6AC6B7980BAFB018E0E0AA800213EF70" doi="10.3897/phytokeys.228.101080.figure74" httpUri="https://binary.pensoft.net/fig/867662" pageId="0" pageNumber="1" start="Figure 74" startId="F74">
<paragraph id="FFD091230BE80C4A7BC599063CFA3766" pageId="0" pageNumber="1">
<emphasis id="CED87FB70C96E9C257186D020FE0CB05" bold="true" pageId="0" pageNumber="1">Figure 74.</emphasis>
<taxonomicName id="08AE55E2F85A8A497FE6AD35A276333E" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis">
<emphasis id="8C076B300A47EB5FBFDE50594113BFE5" italics="true" pageId="0" pageNumber="1">Ulnaria xieriverensis</emphasis>
</taxonomicName>
sp. nov., external view, SEM
<emphasis id="A5779B402BC875E8C956B89DB2C4A586" bold="true" pageId="0" pageNumber="1">A</emphasis>
a complete valve
<emphasis id="EA136E4915B02FF707922375D5B839AD" bold="true" pageId="0" pageNumber="1">B</emphasis>
middle part detail from
<emphasis id="EED2A009A9E3DB8816A2F88AE7021299" bold="true" pageId="0" pageNumber="1">A</emphasis>
, note central area is completely absent
<emphasis id="7F89801351CF36AFE7B84A0853BC30AF" bold="true" pageId="0" pageNumber="1">C, D</emphasis>
two apical details from
<emphasis id="86DC0B26DEA00ABA5956A61DA18F4D24" bold="true" pageId="0" pageNumber="1">A</emphasis>
.
<emphasis id="53A49A5E904B1521B5404F8E50EE6A66" bold="true" pageId="0" pageNumber="1">E, F</emphasis>
Two other apical details, note two horn-like projections protruding over the ocellulimbus (two arrows respectively). Scale bars: 10
<normalizedToken id="95C797CED39BAB4B7B9A9825B0F587C2" originalValue="μm">μm</normalizedToken>
(
<emphasis id="F2B8B446771420DB29286E8DBB087031" bold="true" pageId="0" pageNumber="1">A</emphasis>
); 1
<normalizedToken id="4D988E64BA39AA666CA3AA1D5F59D73F" originalValue="μm">μm</normalizedToken>
(
<emphasis id="DDCF777BAC9755F693E22453F6911CD7" bold="true" pageId="0" pageNumber="1">B-F</emphasis>
).
</paragraph>
</caption>
<caption id="1FFA6F9013C14983DE92178A7253E377" doi="10.3897/phytokeys.228.101080.figure75" httpUri="https://binary.pensoft.net/fig/867663" pageId="0" pageNumber="1" start="Figure 75" startId="F75">
<paragraph id="E4698603BF87E690A9348F2050C88A5B" pageId="0" pageNumber="1">
<emphasis id="F8BC5844E6522468CB59D344D9DFA9AE" bold="true" pageId="0" pageNumber="1">Figure 75.</emphasis>
<taxonomicName id="103F634DFB66A1515ACC82939EE5DA9A" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis">
<emphasis id="BCE900B51B8CDFBBA75964C7F0961AF3" italics="true" pageId="0" pageNumber="1">Ulnaria xieriverensis</emphasis>
</taxonomicName>
sp. nov., internal view, SEM
<emphasis id="69DC6839C6EF9CB4792EC82D9DF613FD" bold="true" pageId="0" pageNumber="1">A</emphasis>
a complete valve
<emphasis id="F89DAE1885D22F6AE7D039F8E21DE218" bold="true" pageId="0" pageNumber="1">B</emphasis>
middle part detail from
<emphasis id="EBADFC35CF2CFD2EB31BFC87F133B315" bold="true" pageId="0" pageNumber="1">A</emphasis>
, note central area is completely absent
<emphasis id="EC1C09D463B90601B3D35FDB7C3B4F0F" bold="true" pageId="0" pageNumber="1">C, D</emphasis>
two apical details from
<emphasis id="8E1B301C8478FEE6BFED2855EC7BB5BA" bold="true" pageId="0" pageNumber="1">A</emphasis>
, note one rimoportula located against the mantle (
<emphasis id="2716B961B8929829221E6849BE0BEDD4" bold="true" pageId="0" pageNumber="1">D</emphasis>
, arrow)
<emphasis id="D8EC90562123470AC9B09B55215F9D9E" bold="true" pageId="0" pageNumber="1">E, F</emphasis>
two other apical details. Scale bars: 10
<normalizedToken id="E96128EB52C2360C29D8EE7FA264817A" originalValue="μm">μm</normalizedToken>
(
<emphasis id="3AA933B3A593B37C702C66AFD89EBCAC" bold="true" pageId="0" pageNumber="1">A</emphasis>
); 1
<normalizedToken id="490449F8459F14BF66CAD0372A7E2CEB" originalValue="μm">μm</normalizedToken>
(
<emphasis id="E3781A1D199CA3C452B4DCC33FF8BC7B" bold="true" pageId="0" pageNumber="1">B-F</emphasis>
).
</paragraph>
</caption>
<caption id="8C973B03547F1977D4CB3AF185E22BEC" doi="10.3897/phytokeys.228.101080.figure76" httpUri="https://binary.pensoft.net/fig/867664" pageId="0" pageNumber="1" start="Figure 76" startId="F76">
<paragraph id="40BEA157DC23E1134510C5E7724FFA8A" pageId="0" pageNumber="1">
<emphasis id="6E17C87E21DC34C6EAF2D1EEEED2B795" bold="true" pageId="0" pageNumber="1">Figure 76.</emphasis>
<taxonomicName id="876239A61933AE4217CB59852231C0B0" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis">
<emphasis id="C915FEABC6CBEB44DB3FB8582FA6A1D1" italics="true" pageId="0" pageNumber="1">Ulnaria xieriverensis</emphasis>
</taxonomicName>
sp. nov., internal view, SEM
<emphasis id="395BF0F09BB523FBF90223FE9C873049" bold="true" pageId="0" pageNumber="1">A</emphasis>
a complete valve with valvocopula
<emphasis id="DBB4E8BF532C17BDA0997E0D9542456D" bold="true" pageId="0" pageNumber="1">B, C</emphasis>
two complete valves with valvocopula, note undulate valve margins
<emphasis id="B5A953933C06DA6052C931CF454D0DB7" bold="true" pageId="0" pageNumber="1">D</emphasis>
middle detail from
<emphasis id="6B9EBB7B8DC309921BE6E8C1A5CA91D7" bold="true" pageId="0" pageNumber="1">A</emphasis>
, note the central area is completely absent and a row of serrated projections over virgae (three arrows)
<emphasis id="A0E32FE0148ACC375532D64CA0C77C29" bold="true" pageId="0" pageNumber="1">E, F</emphasis>
two apical details from
<emphasis id="C081F0256BAD33D3E932258CF1007096" bold="true" pageId="0" pageNumber="1">A</emphasis>
, note serrated projections over virgae (
<emphasis id="4043A4DB602380FEC75F216F64A8E72B" bold="true" pageId="0" pageNumber="1">E</emphasis>
, three arrows). Scale bars: 10
<normalizedToken id="4AF729DC4BF79B1909AFAE09EF296454" originalValue="μm">μm</normalizedToken>
(
<emphasis id="4A5C4005E9C4BF8988DBEE6CDC306D9A" bold="true" pageId="0" pageNumber="1">A-C</emphasis>
); 1
<normalizedToken id="B7421FD57D6B15BEA4CA16D1DE4A6BC2" originalValue="μm">μm</normalizedToken>
(
<emphasis id="1671643A803F681A27E0A839D822C124" bold="true" pageId="0" pageNumber="1">D-F</emphasis>
).
</paragraph>
</caption>
</subSubSection>
<subSubSection id="DEE2A1B56F14D6745413D921EB7627A7" pageId="0" pageNumber="1" type="etymology">
<paragraph id="4B95EF8E320D6CAA5E068BEDF204CBC6" pageId="0" pageNumber="1">Etymology.</paragraph>
<paragraph id="5FAC86BED1FE2CEBEC70AC867CF1A56D" pageId="0" pageNumber="1">Named after Xie River, where the species was found.</paragraph>
</subSubSection>
<subSubSection id="73E2AB9BAFCC6CB4AE0206BE8140A519" pageId="0" pageNumber="1" type="ecology">
<paragraph id="8B6D01F029FB058D02D0F5DDF6DD6DBC" pageId="0" pageNumber="1">Ecology and distribution.</paragraph>
<paragraph id="5DB2BEE90F4710A228C0C2F5C0D6E614" pageId="0" pageNumber="1">
Epilithic in a mountain stream with oligotrophic waters.
<taxonomicName id="D01DF0826E6FC019108C8184F81C5FCC" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria hupingensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="hupingensis">
<emphasis id="C3276B66DF09CBD2CE73C307E98C4FCB" italics="true" pageId="0" pageNumber="1">Ulnaria hupingensis</emphasis>
</taxonomicName>
was found in the same sampling site with
<taxonomicName id="DA060F5B42F14E803C80F68F0964479F" lsidName="U. xieriverensis" pageId="0" pageNumber="1" rank="species" species="xieriverensis">
<emphasis id="D98CF43066E1823EA7216B9C0C033226" italics="true" pageId="0" pageNumber="1">U. xieriverensis</emphasis>
</taxonomicName>
and the environmental parameters see above. So far, its distribution is known only from the type locality.
</paragraph>
</subSubSection>
<subSubSection id="8C78F48B48E14AE99FFC3F15A0FBDD64" pageId="0" pageNumber="1" type="discussion">
<paragraph id="9473488DF9E6345C2BFFDAE29EDB434B" pageId="0" pageNumber="1">Discussion.</paragraph>
<paragraph id="49641B68A8F25DFE68F47C82CC1FA123" pageId="0" pageNumber="1">
<taxonomicName id="4313DCF1E2CA5323259AF7CA3AE28F55" authorityName="Bing Liu" authorityYear="2023" class="Bacillariophyceae" family="Ulnariaceae" genus="Ulnaria" kingdom="Plantae" lsidName="Ulnaria xieriverensis" order="Licmophorales" pageId="0" pageNumber="1" phylum="Bacillariophyta" rank="species" species="xieriverensis">
<emphasis id="7F22AA3B503C3FB3965D4F610B38B75A" italics="true" pageId="0" pageNumber="1">Ulnaria xieriverensis</emphasis>
</taxonomicName>
is characterized by its linear valve outline, absence of central area, and rostrate apices. It differs from
<taxonomicName id="1BC437A8AEC20DB0CA78B10B7E0E592D" lsidName="U. hupingensis" pageId="0" pageNumber="1" rank="species" species="hupingensis">
<emphasis id="EAB65B53C1D7006979F5919814673CD2" italics="true" pageId="0" pageNumber="1">U. hupingensis</emphasis>
</taxonomicName>
by its linear valve outline.
</paragraph>
</subSubSection>
</treatment>
</document>