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<document id="9CB3A9CE337D104027CBF635F08630AF" ID-DOI="10.3897/phytokeys.246.128068" ID-publisher-id="128068" URI-arpha="000F47DC-5262-52E4-97EA-2DA889809C6B" article-type="research-article" checkinTime="1725546749906" checkinUser="pensoft" docAuthor="Li, Lang, Huang, Yu-Yang, Nong, Qun-Zhuan, Lai, Jun-Xiang &amp; Li, Yu-Hang" docDate="2024" docId="5819BBDCF6BA5C33B28D25D04681CE37" docLanguage="en" docName="PhytoKeys 246: 237-249" docOrigin="PhytoKeys 246" docSource="https://phytokeys.pensoft.net/article/128068/download/xml/" docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.phytokeys" docStyleName="PensoftTaxPub.0000.journal_article.phytokeys" docTitle="Planothidium pseudolinkei Lang Li, Yuhang Li &amp; Junxiang Lai 2024, sp. nov." docType="treatment" docVersion="1" dtd-version="3.0" lastPageNumber="249" masterDocId="000F47DC526252E497EA2DA889809C6B" masterDocTitle="Planothidium pseudolinkei sp. nov. (Bacillariophyta), a new marine monoraphid diatom species from the coast of Guangxi, China" masterLastPageNumber="249" masterPageNumber="237" pageNumber="237" updateTime="1725546811719" updateUser="pensoft">
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<mods:title id="F2C7D414D92DB233A1CEE7A3862674C9">Planothidium pseudolinkei sp. nov. (Bacillariophyta), a new marine monoraphid diatom species from the coast of Guangxi, China</mods:title>
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<mods:namePart id="51A0D9E99C543E09B6E73CF52EC89777">Li, Lang</mods:namePart>
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<mods:affiliation id="05F186B0CFFDEADB21096875BD467280">Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning 530007, China &amp; Beibu Gulf Marine Industry Research Institute, Fangchenggang 538000, China</mods:affiliation>
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<mods:namePart id="E937D76135B491620863F286E7D05C78">Huang, Yu-Yang</mods:namePart>
<mods:nameIdentifier id="F4F012742F8EA8FA35ACBEAC2547525B" type="ORCID">https://orcid.org/0009-0009-7327-1518</mods:nameIdentifier>
<mods:affiliation id="D68C5C8D351A05BD9B147477AA28D5B1">School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China</mods:affiliation>
</mods:name>
<mods:name id="B95ED74D516465D28E6B69E8AD7A239F" type="personal">
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<mods:namePart id="D0FDF98200EB28DAED2F77A003714EDB">Nong, Qun-Zhuan</mods:namePart>
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<mods:affiliation id="833C6C84E85FC6692AA69E2C757A4B45">School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China</mods:affiliation>
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<mods:namePart id="AB7CE29F7EA9FBB5F5407F1EB40EF28C">Lai, Jun-Xiang</mods:namePart>
<mods:nameIdentifier id="90B15002D84FAFAF4DE9AD4BA1E8E98E" type="ORCID">0000-0002-7139-1454</mods:nameIdentifier>
<mods:affiliation id="D31603C520C78BF6A0EC54F20589E6FC">Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning 530007, China &amp; Beibu Gulf Marine Industry Research Institute, Fangchenggang 538000, China</mods:affiliation>
</mods:name>
<mods:name id="7DD15B2389011F0E9A6DEA2110D4230E" type="personal">
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<mods:namePart id="C30B3732F19F7ACDCA202A1CD3172087">Li, Yu-Hang</mods:namePart>
<mods:nameIdentifier id="2BF4451924161FA95FB6506FC18E5F36" type="ORCID">0000-0002-5546-1774</mods:nameIdentifier>
<mods:affiliation id="CBC36FF260C048A6CCACBF5BAAD48E31">Laboratory of Marine Organism Taxonomy and Phylogeny, Qingdao Key Laboratory of Marine Biodiversity and Conservation, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China</mods:affiliation>
</mods:name>
<mods:typeOfResource id="C26AB42212DCD6F047C48F7E9C352176">text</mods:typeOfResource>
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<mods:title id="E14E4A758FE11B6B74EC745484300050">PhytoKeys</mods:title>
</mods:titleInfo>
<mods:part id="DE711E5CDA69C26C360F490D7D3A5596">
<mods:date id="1E28B76B8E9F34D9FC33B30B8EF1FF2A">2024</mods:date>
<mods:detail id="9B825FD6807C72CCAF8CB7DA70B3D0E2" type="pubDate">
<mods:number id="403AF1D987C50DDA50D883FC86535CDD">2024-09-05</mods:number>
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<mods:number id="8F32E323BA71D772911587EF9CB677FD">246</mods:number>
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<mods:identifier id="6ED00AEE27AE290F4D94CCF2EA969D4E" type="DOI">10.3897/phytokeys.246.128068</mods:identifier>
</mods:mods>
<treatment id="5819BBDCF6BA5C33B28D25D04681CE37" ID-arpha="5819BBDC-F6BA-5C33-B28D-25D04681CE37" LSID="urn:lsid:plazi:treatment:5819BBDCF6BA5C33B28D25D04681CE37" httpUri="http://treatment.plazi.org/id/5819BBDCF6BA5C33B28D25D04681CE37">
<subSubSection id="F8E315C766C4510D444DD4780E80610A" type="nomenclature">
<paragraph id="17C7D4A8B8137A83DD46AB04CC3EB1B3">
<taxonomicName id="47947719EF01F3E40CF088857A2AEBD6" authority="Lang Li, Yuhang Li &amp; Junxiang Lai" authorityName="Lang Li, Yuhang Li &amp; Junxiang Lai" authorityYear="2024" class="Bacillariophyceae" family="Achnanthaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Plantae" order="Mastogloiales" phylum="Ochrophyta" rank="species" species="pseudolinkei" status="sp. nov.">
<emphasis id="A512099AE3B30E6B4DD47DA6F7D85B1A" italics="true">Planothidium pseudolinkei</emphasis>
Lang Li, Yuhang Li &amp; Junxiang Lai
</taxonomicName>
<taxonomicNameLabel id="4837589112387DAF6F7B2E770F9A93E3" rank="species">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="25020A7DBA00D19F98707C19C7F0F8E1" type="description">
<paragraph id="05D7F661840C7F3936E796F85A7920D9">
<figureCitation id="AD8BC0C4EFC1F337C09ABE13A81E4653" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">Figs 2</figureCitation>
,
<figureCitation id="D4541BC82BA7E05682EDA9A6F5FCF53E" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3</figureCitation>
,
<figureCitation id="C7DCFB8D265782984E5A23007DE2A902" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4</figureCitation>
</paragraph>
</subSubSection>
<subSubSection id="SECID0EKAAE" type="Holotype">
<paragraph id="75D75C7706EC5CC4A2AC7502A5AF3D08">
<heading id="ED9A51D04EB86F9CA08B1DE0E6239161" reason="title">
<typeStatus id="F77A7645202137FAF21A2EEC2EB71A04" type="holotype">Holotype</typeStatus>
.
</heading>
</paragraph>
<paragraph id="5A2CF2D5875232CF51E2066F5A89570F">
<materialsCitation id="21E373D096EE00C4EBDC2C46AF12ED06" country="China" location="Chinese Academy of Sciences" specimenCount="1" typeStatus="holotype">
Slide MBMCAS 286907 deposited in the Marine Biological Museum,
<location id="E18B94E5A540EABE9781E08A698BAECB" LSID="urn:lsid:plazi:treatment:5819BBDCF6BA5C33B28D25D04681CE37:E18B94E5A540EABE9781E08A698BAECB" country="China" name="Chinese Academy of Sciences">Chinese Academy of Sciences</location>
(MBMCAS), Qingdao,
<collectingCountry id="FECBAB65F6382D43EE6EB688B7EABD36" name="China">China</collectingCountry>
, represented here by Fig.
<figureCitation id="264C7F7A2452C5765D5BC3D673B8F692" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">2 B</figureCitation>
(Rapheless valve) and Fig.
<figureCitation id="7526107A5E3B1F7B47AFD9AAC638B766" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">2 H</figureCitation>
(Raphe valve).
</materialsCitation>
</paragraph>
<caption id="B4F79D1B43290E9E190524988703D488" ID-DOI="10.3897/phytokeys.246.128068.figure2" ID-arpha="0A4F2328-9F2F-5323-AEF8-BEB8CE4A5C37" httpUri="https://binary.pensoft.net/fig/1128861" startId="F2">
<paragraph id="E9B22829BAF1AAD3B1D0DFF9752AFBA9">
<label id="6357F98CAB5D3D8B333A007DEC56E391">Figure 2.</label>
</paragraph>
<paragraph id="5FE93C3DFBDFCA0109398C7C35DCC621">
<taxonomicName id="1870B60CF7AE868E5860A1D963103CF7" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei" status="sp. nov.">
<emphasis id="909A3C95F9353D5B535068092ACBBCC8" italics="true">Planothidium pseudolinkei</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A44A5E9EE204F7C00AE6341B769CE27C" rank="species">sp. nov.</taxonomicNameLabel>
LM
<emphasis id="2C2FE82B5D21BDA52E6E08000DCC53A1" bold="true">A F</emphasis>
rapheless valves
<emphasis id="2F4D791EAD4C7090FB5522A81D4A65AA" bold="true">G L</emphasis>
raphe valves
<emphasis id="2522B0D4F60DB9F52CF2303575AF16FF" bold="true">B, H</emphasis>
holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm.
</paragraph>
</caption>
</subSubSection>
<subSubSection id="SECID0EWBAE" type="type locality">
<paragraph id="8DE370A435C56083449541713F29B9BF">
<heading id="D0FC31F0241ED3D70A2B732AF206605B" reason="title">Type locality.</heading>
</paragraph>
<paragraph id="16E7510E15EBEC771205D98D4B26CAA2">
Jin Beach, Wanwei Island,
<collectingRegion id="4942BF8330A1D22B2CC1C8891F943A72" country="China" name="Guangxi">Guangxi Province</collectingRegion>
,
<collectingCountry id="EFDD733E5B11600623BE15E3A3BAE4F7" name="China">China</collectingCountry>
,
<named-content content-type="dwc:verbatimCoordinates" id="NCID0E6BAE" specific-use="{&quot;type&quot;:&quot;Point&quot;,&quot;coordinates&quot;:[108.182500,21.530833]}">
<geoCoordinate id="175914A3716935943BE28A5EAAEA37D7" degrees="21" direction="north" minutes="31.85" orientation="latitude" precision="9" value="21.530834">21 ° 31.85 N</geoCoordinate>
,
<geoCoordinate id="FC03D63B6AB6D93CAEE0A63DAF6C0453" degrees="108" direction="east" minutes="10.95" orientation="longitude" precision="9" value="108.1825">108 ° 10.95 E</geoCoordinate>
</named-content>
, surface sand samples, collected by Lang Li on
<date id="6C098A4F7B4351E52E736FCD45E4F9DC" value="2021-01-10">10 January 2021</date>
.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EECAE" type="description">
<paragraph id="1BD838DC1F908DE54FC6E5F0AA463DCF">
<heading id="35DF41A3895A0F06A8240B081664A780" reason="title">Description.</heading>
</paragraph>
<paragraph id="C88A2AF8E49D588472DA93BF9FF80A06">
<emphasis id="22474F67E72BA502F04EC92E147B1B29" bold="true" italics="true">LM</emphasis>
(Fig.
<figureCitation id="268CB801E8F58E37095796C1DC704AB7" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">2 A L</figureCitation>
). Valves lanceolate to elliptic-lanceolate with convex margins and protracted, capitate to rostrate apices. Valve dimensions (n = 75): length 26.550.0 μm, width 10.013.0 μm. Rapheless valve (Fig.
<figureCitation id="16C45DC2B1C26A8F1E5E8EC18C8D5DAC" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">2 A F</figureCitation>
): Axial area linear and narrowly lanceolate, slightly expanded in the middle of the valve. Central area asymmetrical with a unilateral large hyaline area; on the opposite side, striae barely shortened near the axial area. Striae weakly radiate at the center and more strongly radiate towards the apices,
<quantity id="51CAB83515277C6671C9275DF81C0F5D" metricMagnitude="-1" metricUnit="m" metricValue="2.921" metricValueMax="3.048" metricValueMin="2.794" unit="in" value="11.5" valueMax="12.0" valueMin="11.0">1112 in</quantity>
10 μm. Raphe valve (Fig.
<figureCitation id="8ADC92768C485197131768D6E25E2211" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Planothidium pseudolinkei sp. nov. LM A F rapheless valves G L raphe valves B, H holotype designated. “ = ” indicates the different valves of the same frustule. Scale bars: 10 μm." figureDoi="10.3897/phytokeys.246.128068.figure2" httpUri="https://binary.pensoft.net/fig/1128861">2 G L</figureCitation>
): Axial area very narrow, linear, slightly widened near the middle of the valve. Central area very small, slightly transapically expanded, bordered by 34 shortened striae on each side. Raphe straight, filiform with slightly enlarged central raphe endings. Terminal fissures not discernible in LM. Striae radiate throughout the entire valve,
<quantity id="FBE9838AE7640347262F82F5E366E0DF" metricMagnitude="-1" metricUnit="m" metricValue="3.048" unit="in" value="12.0">12 in</quantity>
10 μm. Areolae not discernible in LM.
</paragraph>
<paragraph id="A4BC00A0C28A27961FD38A751931A0B7">
<abbrev id="ABBRID0EADAE" xlink_title="scanning electron microscope">
<emphasis id="AEA8C5A1F726869D0DA7E0719B1820DA" bold="true" italics="true">SEM</emphasis>
</abbrev>
(Figs
<figureCitation id="99F9FC853D66BF254953755C8C052B9F" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 A F</figureCitation>
,
<figureCitation id="0C65D6658DC150E24FDBE0BA9DEAC5EC" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 A F</figureCitation>
). Rapheless valve (Fig.
<figureCitation id="6585743408B155614DF07D4E77308134" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 A F</figureCitation>
): Externally, valve face generally flat, with a slightly linear depression in the axial area (Fig.
<figureCitation id="032C8F475311B17F09689BD672D933CD" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 A</figureCitation>
). Central area large, unilateral (Fig.
<figureCitation id="B6BDA9500D99A2431EDE9EFF48F188F6" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 A, B</figureCitation>
). Striae multiseriate, composed of three rows of small, rounded areolae at the apices, varying from three rows near the valve face / mantle junction to biseriate towards the axial area (Fig.
<figureCitation id="8675EFB722E794FB950DC130E0D80011" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 B, C</figureCitation>
). Striae portion near the axial area often composed of one or two areolae (Fig.
<figureCitation id="6F451B335974F5B8913FD06309B9037A" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 B</figureCitation>
). Striae extending onto the valve mantle, but interrupted by the valve face-mantle junction (Fig.
<figureCitation id="E44F1EF12A7C739BF636A9C975058704" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 B, C</figureCitation>
). Internally, axial area elevated and striae sunken between the raised virgae (Fig.
<figureCitation id="BAF0F5CF219FE418984E5F293E511101" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 D F</figureCitation>
). A well-developed sinus distinctly present on one side of the central area, with the borders fusing with lateral virgae, forming a deep oblong depression (Fig.
<figureCitation id="BA4AD4B7D88FC4BE0682D7170257BD2D" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Planothidium pseudolinkei sp. nov. SEM A external view of an entire rapheless valve B external detail of the interruption of the striae on the rapheless valve C external detail of the valve apex D internal view of an entire rapheless valve E internal detail of the sinus depression F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure3" httpUri="https://binary.pensoft.net/fig/1128862">3 D, E</figureCitation>
). Raphe valve (Fig.
<figureCitation id="621FCD43A64BF65B31962752A2102E45" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 A F</figureCitation>
): Externally, valve face flat (Fig.
<figureCitation id="3E948F23B9886E064F6036A49A5B2776" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 A</figureCitation>
). Striae composed of one to four rows of small, rounded areolae, clearly broader than virgae at the apices (Fig.
<figureCitation id="8221B4D20F9FBE331CDC2A84690B4C79" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 B, C</figureCitation>
). Striae portion along the axial area composed of two larger areolae than other ones (Fig.
<figureCitation id="84B5088FF9C0CFA33414B387EBA7AF4C" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 B, C</figureCitation>
). Central raphe endings straight, simple, expanded and pore-like (Fig.
<figureCitation id="463570D329916D286416E61E0AA2A674" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 B</figureCitation>
). Terminal fissures bent, continuing shortly onto the valve mantle (Fig.
<figureCitation id="2F0907F47AB4A0AF7091FA930E001ED1" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 C</figureCitation>
). Internally, virgae poorly developed (Fig.
<figureCitation id="276B5214E84E2736F553516A311A7801" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 D F</figureCitation>
). Raphe hook-shaped, branches situated on a slightly elevated raphe-sternum (Fig.
<figureCitation id="18F9DD98D58BB9C2BC4B62678B9167AE" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 D</figureCitation>
). Terminal raphe endings terminated by small helictoglossae (Fig.
<figureCitation id="0891F1DD08107BE0D1AAD73F83B97264" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Planothidium pseudolinkei sp. nov. SEM A external view of an entire raphe valve B external detail of the central area of the raphe valve C external detail of the valve apex D internal view of an entire raphe valve E internal detail of the central area of the raphe valve F internal detail of the valve apex. Scale bars: 10 μm (A, D); 5 μm (B, C, E, F)." figureDoi="10.3897/phytokeys.246.128068.figure4" httpUri="https://binary.pensoft.net/fig/1128863">4 F</figureCitation>
).
</paragraph>
<caption id="34B72704871F2275985E815FB3EE2C76" ID-DOI="10.3897/phytokeys.246.128068.figure3" ID-arpha="8D9670E6-D8A3-5567-91CD-08DE5753392E" httpUri="https://binary.pensoft.net/fig/1128862" startId="F3">
<paragraph id="32A18B728588DAA5E6518A7F7D55A256">
<label id="A48A5B15E7C5A50C084CECDB01BE4364">Figure 3.</label>
</paragraph>
<paragraph id="DF60213BB07A363AB25AFDDC47BE8BE0">
<taxonomicName id="B9B1566AE06242D7721B61035BD7D876" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei" status="sp. nov.">
<emphasis id="B524685974A562E9DD4F93A28561F25D" italics="true">Planothidium pseudolinkei</emphasis>
</taxonomicName>
<taxonomicNameLabel id="3C7D269FA94D411FDC98E97B0FE42509" rank="species">sp. nov.</taxonomicNameLabel>
<abbrev id="ABBRID0EEGAE" xlink_title="scanning electron microscope">SEM</abbrev>
<emphasis id="DD7AFCF5BAC1F8A4B4A104AD1855AC98" bold="true">A</emphasis>
external view of an entire rapheless valve
<emphasis id="15FC20C451A8AD8CB8EAB83BF0794956" bold="true">B</emphasis>
external detail of the interruption of the striae on the rapheless valve
<emphasis id="31AC24F74647A9158E0D1BDC94F3FC29" bold="true">C</emphasis>
external detail of the valve apex
<emphasis id="76767E01EC2B230BF009B3E56237353D" bold="true">D</emphasis>
internal view of an entire rapheless valve
<emphasis id="DBDB1F85284965FFB812D8C135D99096" bold="true">E</emphasis>
internal detail of the sinus depression
<emphasis id="3ECDB63641A0104B7B369E2465F6BB9E" bold="true">F</emphasis>
internal detail of the valve apex. Scale bars: 10 μm (
<emphasis id="25AFE4FCF753C0B8BD69BA92A7168F38" bold="true">A, D</emphasis>
); 5 μm (
<emphasis id="0F234F522012F3ADC3ED7C080CB9621C" bold="true">B, C, E, F</emphasis>
).
</paragraph>
</caption>
<caption id="2DD334A7A58535F33DAEB124F7B13C33" ID-DOI="10.3897/phytokeys.246.128068.figure4" ID-arpha="46A63273-7BE9-5AA8-9790-41B1F3143BC6" httpUri="https://binary.pensoft.net/fig/1128863" startId="F4">
<paragraph id="65FCEF4042DCA2D0A0870652F51B597E">
<label id="7761E1DE8FA5C724B16F687766AB9783">Figure 4.</label>
</paragraph>
<paragraph id="C5DDC38E25D6370E506F14C2A0312788">
<taxonomicName id="AE48A4C69640B37299C39C2E8A0CFB66" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei" status="sp. nov.">
<emphasis id="9293D9ADEC19CC685E61EE5B66C15D3B" italics="true">Planothidium pseudolinkei</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A0F3AC735BA5E6FD3CB7DDAF91F582D1" rank="species">sp. nov.</taxonomicNameLabel>
<abbrev id="ABBRID0EQHAE" xlink_title="scanning electron microscope">SEM</abbrev>
<emphasis id="80AE6743ACC99B68872DCF7BFF079DA3" bold="true">A</emphasis>
external view of an entire raphe valve
<emphasis id="332C6DFDA3290BCB9B4105CAD5E902DD" bold="true">B</emphasis>
external detail of the central area of the raphe valve
<emphasis id="36825919561DA5BD05C4893BD6CD0C8A" bold="true">C</emphasis>
external detail of the valve apex
<emphasis id="E93B0CB50C0C39CF1A94A4E6DA220612" bold="true">D</emphasis>
internal view of an entire raphe valve
<emphasis id="CE5A13BED12C99B5996DAADDE45E4E81" bold="true">E</emphasis>
internal detail of the central area of the raphe valve
<emphasis id="AD61D69A27AFB815A0CD5F2D84366F0B" bold="true">F</emphasis>
internal detail of the valve apex. Scale bars: 10 μm (
<emphasis id="60875DF6634F8335A10E1F80FF41F6E5" bold="true">A, D</emphasis>
); 5 μm (
<emphasis id="3257E8B1E2F07AE3A3730D4BD6B51BA4" bold="true">B, C, E, F</emphasis>
).
</paragraph>
</caption>
</subSubSection>
<subSubSection id="SECID0EJIAE" type="etymology">
<paragraph id="CA300688F8E177B80B6820B76A3E4A9A">
<heading id="252D6F571B1AF9FE0CBDA1B160CACCEF" reason="title">Etymology.</heading>
</paragraph>
<paragraph id="8C2236293E86B1600F94C4FE9E69ED53">
The specific epithet,
<taxonomicName id="166372637FBFA901BFAA2A0E7068673C" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei">
<emphasis id="CAFB7AE75A5278998C3285E01ABFE059" italics="true">pseudolinkei</emphasis>
</taxonomicName>
, was referring to the morphological and habitat similarities with
<taxonomicName id="ADD24AE30A692F452D26738CE66C8D1E" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="linkei">
<emphasis id="BB0004CBC3D3130B084D1D5571238B67" italics="true">P. linkei</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EEJAE" type="PhycoBank registration">
<paragraph id="DB98EC733517B812D462CEDA83245271">
<heading id="6774691DE68B12179E0A35DC72E3AA88" reason="title">PhycoBank registration.</heading>
</paragraph>
<paragraph id="7566D7A191C43701C7B7E1FCA782DA2C">
<ext-link id="D697BCD14F9B3608BBE2FCE5161DD176" ext-link-type="uri" xlink_href="http://phycobank.org/104835" xlink_type="simple">http://phycobank.org/104835</ext-link>
.
</paragraph>
</subSubSection>
<subSubSection id="SECID0EPJAE" type="distribution">
<paragraph id="B3E4559D0B04A71C6CF0E549660959D9">
<heading id="94ECC673FD7B8E1ECA9A336D081E802B" reason="title">Distribution and ecology.</heading>
</paragraph>
<paragraph id="C66BDFB1203C9C3E45014C82AE3B610D">
In addition to the
<typeStatus id="F74085147DFD30CCDC5B4D3D6FA05E23">type</typeStatus>
locality,
<taxonomicName id="AE6C3C27E930C5A6363DD4CDFCA3B4C9" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei">
<emphasis id="14DAE47C0E64100180561E57A80010B2" italics="true">P. pseudolinkei</emphasis>
</taxonomicName>
also occurs in the surface sand sample from the Bailang Beach of Jiangshan Peninsula. This taxon is a marine epipsammic diatom. In the
<typeStatus id="E885807DB437B7F6BA8BFCCD0FA2DD47">type</typeStatus>
material,
<taxonomicName id="CFDC589BEED25BB940A8BDA7D0CF0266" authorityName="Li &amp; Huang &amp; Nong &amp; Lai &amp; Li" authorityYear="2024" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="pseudolinkei">
<emphasis id="F909A7F4EEE84D94CB3920CA374FF817" italics="true">P. pseudolinkei</emphasis>
</taxonomicName>
was very rare and only found in abundance of 0.14 %. The associated diatom flora is composed of
<taxonomicName id="10BED9C15975FB789A7AB02870CD538A" class="Bacillariophyceae" family="Naviculaceae" genus="Amphora" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="A853D60B463E9FBC2581B6D7C4D08820" italics="true">Amphora</emphasis>
spp.
</taxonomicName>
,
<taxonomicName id="C6659E3199D7A8117DE59987465B7558" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="5B7939E1151F905B38D7F90FAD415440" italics="true">Navicula</emphasis>
spp.
</taxonomicName>
,
<taxonomicName id="630E7DCC2F3B93250400181675611B7D" class="Bacillariophyceae" family="Diploneidaceae" genus="Diploneis" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="70762A9E33A2EE4C02085FDA24297CF0" italics="true">Diploneis</emphasis>
spp.
</taxonomicName>
,
<taxonomicName id="ED40BF36E967E3427F04655A19762E80" class="Insecta" family="Cerambycidae" genus="Fallacia" kingdom="Animalia" order="Coleoptera" phylum="Arthropoda" rank="species" species="undetermined">
<emphasis id="EE66AFAC3BFC01F906430F27761DFDF4" italics="true">Fallacia</emphasis>
spp.
</taxonomicName>
,
<taxonomicName id="60B6D1FB1A9141E370896A8756676A0C" class="Bacillariophyceae" family="Naviculaceae" genus="Cocconeiopsis" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="229E370C6BF8094D2FA937B226408B39" italics="true">Cocconeiopsis</emphasis>
spp.
</taxonomicName>
,
<taxonomicName id="DA066BBB27712943D0927208E832AB3B" class="Bacillariophyceae" family="Pleurosigmataceae" genus="Gyrosigma" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="19F58D223753D46018FE584396B0AB4C" italics="true">Gyrosigma</emphasis>
sp.
</taxonomicName>
,
<taxonomicName id="CA76DB6699811B8CF79084BD2C81ED6D" class="Bacillariophyceae" family="Achnanthidiaceae" genus="Planothidium" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="undetermined">
<emphasis id="B18D7EC86BC72A6E0534B82DA70748EF" italics="true">Planothidium</emphasis>
sp.
</taxonomicName>
,
<taxonomicName id="52A91F640136D31F77C8434C3E2A5385" authority="Hustedt" authorityName="Hustedt" authorityYear="1955" class="Bacillariophyceae" family="Cocconeidaceae" genus="Anorthoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Achnanthales" phylum="Ochrophyta" rank="species" species="hummii">
<emphasis id="DD43D1B37B4312837B714E88577D759F" italics="true">Anorthoneis hummii</emphasis>
Hustedt
</taxonomicName>
,
<taxonomicName id="4B79530A6DD490B617B87AD673A1B930" authority="(Cleve) D. G. Mann" authorityName="D. G. Mann" baseAuthorityName="Cleve" class="Polychaeta" family="Terebellidae" genus="Biremis" kingdom="Animalia" order="Terebellida" phylum="Annelida" rank="species" species="ambigua">
<emphasis id="F2196E3135CEA2CE03A9AF45F0914AFD" italics="true">Biremis ambigua</emphasis>
(Cleve) D. G. Mann
</taxonomicName>
,
<taxonomicName id="319F1719A2C88287D102AA954FE5E4D6" authority="A. Witkowski" authorityName="A. Witkowski" authorityYear="2000" class="Bacillariophyceae" family="Naviculaceae" genus="Cymatoneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="margarita">
<emphasis id="42ACF0B9AED8FAA089959C933751704A" italics="true">Cymatoneis margarita</emphasis>
A. Witkowski
</taxonomicName>
,
<taxonomicName id="57742FC50428E6A5133ACCB9FB5C4CAE" authority="J. Park et al." authorityName="J. Park" class="Bacillariophyceae" family="Lyrellaceae" genus="Moreneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Lyrellales" phylum="Ochrophyta" rank="species" species="coreana">
<emphasis id="7C0C81A40D3401E27A434808CA07787E" italics="true">Moreneis coreana</emphasis>
J. Park et al.
</taxonomicName>
and
<taxonomicName id="6BFE7D854AF8B876DEA6B9B39663605F" authority="(C. Agardh) Levkov." authorityName="Levkov." baseAuthorityName="C. Agardh" class="Bacillariophyceae" family="Amphipleuraceae" genus="Halamphora" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" phylum="Ochrophyta" rank="species" species="coffeiformis">
<emphasis id="B8887F046825F856AA58FB5BB5C98D72" italics="true">Halamphora coffeiformis</emphasis>
(C. Agardh) Levkov.
</taxonomicName>
</paragraph>
</subSubSection>
</treatment>
</document>