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<document id="EB8D5C296C267938AC763A9D35F0F7D3" ID-CLB-Dataset="302088" ID-DOI="10.11646/phytotaxa.218.3.4" ID-GBIF-Dataset="ad6b764d-0345-45f9-8647-31b3b3ea7068" ID-ISSN="1179-3163" ID-Zenodo-Dep="13635632" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1725332013892" checkinUser="felipe" docAuthor="Bahls, Loren &amp; Potapova, Marina" docDate="2015" docId="400EA80ACA75FFC9FF6084C66DA83CAB" docLanguage="en" docName="phytotaxa.218.3.4.pdf" docOrigin="Phytotaxa 218 (3)" docSource="http://dx.doi.org/10.11646/phytotaxa.218.3.4" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Navicula volcanica Bahls &amp; Potapova 2015, sp. nov." docType="treatment" docVersion="3" lastPageNumber="258" masterDocId="BC37D072CA77FFCCFFE883526E653B6E" masterDocTitle="Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest" masterLastPageNumber="267" masterPageNumber="253" pageNumber="255" updateTime="1725338348313" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="EFC7D85B1DA06C80C494EAFD3FBDAC61">Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest</mods:title>
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<mods:namePart id="2E75D8C6DB6B58A5336A3D09BAC8D761">Bahls, Loren</mods:namePart>
<mods:affiliation id="F470B2506007EE8467BC25A2E387A401">The Montana Diatom Collection, 1032 12 Avenue, Helena, Montana 59601 USA.</mods:affiliation>
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<mods:namePart id="2B16F1FCB820E94842F37A9DC3F38B13">Potapova, Marina</mods:namePart>
<mods:affiliation id="F6EA0E9A68E8549C2B298456CA735D6B">Diatom Herbarium, The Academy of Natural Sciences, Drexel University, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania, 19103, USA.</mods:affiliation>
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<mods:title id="4B8A664B82F0C03A9363B144388904A2">Phytotaxa</mods:title>
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<treatment id="400EA80ACA75FFC9FF6084C66DA83CAB" ID-DOI="http://doi.org/10.5281/zenodo.13635630" ID-GBIF-Taxon="240097903" ID-Zenodo-Dep="13635630" LSID="urn:lsid:plazi:treatment:400EA80ACA75FFC9FF6084C66DA83CAB" httpUri="http://treatment.plazi.org/id/400EA80ACA75FFC9FF6084C66DA83CAB" lastPageId="5" lastPageNumber="258" pageId="2" pageNumber="255">
<subSubSection id="80BD4A97CA75FFCFFF6084C66D653A2B" lastPageId="3" lastPageNumber="256" pageId="2" pageNumber="255" type="nomenclature">
<paragraph id="C818191CCA75FFCEFF6084C66D503CC1" blockId="2.[136,821,1940,1967]" box="[136,821,1940,1967]" pageId="2" pageNumber="255">
<heading id="9350AE70CA75FFCEFF6084C66D503CC1" bold="true" box="[136,821,1940,1967]" fontSize="11" level="1" pageId="2" pageNumber="255" reason="1">
<emphasis id="FAD3C50ECA75FFCEFF6084C66D503CC1" bold="true" box="[136,821,1940,1967]" pageId="2" pageNumber="255">
<taxonomicName id="0FA7629FCA75FFCEFF6084C66C223CC1" authority="Bahls &amp; Potapova" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[136,583,1940,1967]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="2" pageNumber="255" phylum="Ochrophyta" rank="species" species="volcanica" status="sp. nov.">
<emphasis id="FAD3C50ECA75FFCEFF6084C66F003CC1" bold="true" box="[136,357,1940,1967]" italics="true" pageId="2" pageNumber="255">Navicula volcanica</emphasis>
Bahls &amp; Potapova
</taxonomicName>
,
<taxonomicNameLabel id="E1E07875CA75FFCEFDBB84C66CCE3CC1" box="[595,683,1940,1967]" pageId="2" pageNumber="255" rank="species">
<emphasis id="FAD3C50ECA75FFCEFDBB84C66C093CC0" bold="true" box="[595,620,1940,1966]" italics="true" pageId="2" pageNumber="255">sp</emphasis>
.
<emphasis id="FAD3C50ECA75FFCEFD9284C66CC13CC0" bold="true" box="[634,676,1940,1966]" italics="true" pageId="2" pageNumber="255">nov</emphasis>
.
</taxonomicNameLabel>
(
<figureCitation id="509C0599CA75FFCEFD5184C46D483CC1" box="[697,813,1942,1967]" captionStart-0="FIGURES 210" captionStart-1="FIGURES 1117" captionStartId-0="4.[136,243,1727,1748]" captionStartId-1="5.[136,243,1715,1736]" captionTargetBox-0="[225,1360,190,1685]" captionTargetBox-1="[189,1398,389,1687]" captionTargetId-0="figure-17@4.[189,1398,190,1702]" captionTargetId-1="figure-92@5.[189,1398,389,1690]" captionTargetPageId-0="4" captionTargetPageId-1="5" captionText-0="FIGURES 210. Navicula volcanica, LM.3. Preserved specimen with intact chloroplasts and four large oil droplets.5. Holotype specimen. 2, 4, 610. Clearwater River, Oregon. 3, 5. North Umpqua River, Oregon. Scale bars = 10 μm." captionText-1="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi-0="http://doi.org/10.5281/zenodo.13635638" figureDoi-1="http://doi.org/10.5281/zenodo.13635640" httpUri-0="https://zenodo.org/record/13635638/files/figure.png" httpUri-1="https://zenodo.org/record/13635640/files/figure.png" pageId="2" pageNumber="255">Figs 217</figureCitation>
)
</emphasis>
</heading>
</paragraph>
<paragraph id="C818191CCA75FFCFFF6084B26D653A2B" blockId="2.[136,1452,2016,2073]" lastBlockId="3.[136,1452,160,433]" lastPageId="3" lastPageNumber="256" pageId="2" pageNumber="255">
Valves broadly rhombic with rounded apices. Length 100176 μm, width 3037 μm. Axial and central areas moderately wide, one-third to one-half the valve width, together forming a narrow lanceolate shape with a tumid center. Central area rhombic, surrounded by alternately long and short striae. Raphe lateral and somewhat bowed, concave to the primary side of the valve. Proximal raphe ends inflated and tipped slightly to the secondary side. Terminal raphe fissures shaped like question marks. Striae curved, strongly radiate, structured internally as deep grooves,
<quantity id="0F5FB4F9CA74FFCFFDC483BA6C0C3B93" box="[556,617,232,253]" metricMagnitude="-1" metricUnit="m" metricValue="1.778" metricValueMax="2.032" metricValueMin="1.524" pageId="3" pageNumber="256" unit="in" value="7.0" valueMax="8.0" valueMin="6.0">68 in</quantity>
10 μm. Areolae about
<quantity id="0F5FB4F9CA74FFCFFCAE83BA6D123B93" box="[838,887,232,253]" metricMagnitude="-1" metricUnit="m" metricValue="7.112" pageId="3" pageNumber="256" unit="in" value="28.0">28 in</quantity>
10 μm. Internally, areolae apically elongated, occluded by hymens. External areolae openings small and fused into a narrow slit on external valve surface. Cells solitary with two plate-like chloroplasts lying along the girdle on each side of the valve.
</paragraph>
</subSubSection>
<subSubSection id="80BD4A97CA74FFCFFF6082066CE13ADF" pageId="3" pageNumber="256" type="materials_examined">
<paragraph id="C818191CCA74FFCFFF6082066CE13ADF" blockId="3.[136,1452,160,433]" pageId="3" pageNumber="256">
<emphasis id="FAD3C50ECA74FFCFFF6082066EDF3A07" bold="true" box="[136,186,340,361]" pageId="3" pageNumber="256">Type</emphasis>
:—
<collectingCountry id="B0B0598CCA74FFCFFF3082066F693A07" box="[216,268,340,361]" name="United States of America" pageId="3" pageNumber="256">USA</collectingCountry>
.
<collectingRegion id="0A63D7FECA74FFCFFEFC82066F3B3A07" box="[276,350,340,361]" country="United States of America" name="Oregon" pageId="3" pageNumber="256">Oregon</collectingRegion>
, Douglas County: North Umpqua River,
<geoCoordinate id="AD937FDBCA74FFCFFD0A82066D273A07" box="[738,834,340,361]" degrees="43.311" direction="north" orientation="latitude" pageId="3" pageNumber="256" precision="55" value="43.311">43.311º N</geoCoordinate>
,
<geoCoordinate id="AD937FDBCA74FFCFFCA382066DD93A07" box="[843,956,340,361]" degrees="122.155" direction="west" orientation="longitude" pageId="3" pageNumber="256" precision="55" value="-122.155">122.155º W</geoCoordinate>
,
<quantity id="0F5FB4F9CA74FFCFFC2D82066A683A07" box="[965,1037,340,361]" metricMagnitude="3" metricUnit="m" metricValue="1.262" pageId="3" pageNumber="256" unit="m" value="1262.0">1262 m</quantity>
a.s.l.,
<emphasis id="FAD3C50ECA74FFCFFBA182066A3D3A07" box="[1097,1112,340,361]" italics="true" pageId="3" pageNumber="256">
<collectionCode id="AEB681D9CA74FFCFFBA182066A3D3A07" box="[1097,1112,340,361]" country="USA" lsid="urn:lsid:biocol.org:col:15406" name="Harvard University - Arnold Arboretum" pageId="3" pageNumber="256" type="Herbarium">A</collectionCode>
</emphasis>
.
<taxonomicName id="0FA7629FCA74FFCFFB8B82066AD63A07" box="[1123,1203,340,361]" genus="Johnson" kingdom="Plantae" pageId="3" pageNumber="256" phylum="Chlorophyta" rank="genus">
<emphasis id="FAD3C50ECA74FFCFFB8B82066AD63A07" box="[1123,1203,340,361]" italics="true" pageId="3" pageNumber="256">Johnson</emphasis>
</taxonomicName>
,
<emphasis id="FAD3C50ECA74FFCFFB5582066B213A07" box="[1213,1348,340,361]" italics="true" pageId="3" pageNumber="256">
<date id="BC193FDCCA74FFCFFB5582066B213A07" box="[1213,1348,340,361]" pageId="3" pageNumber="256" value="2011-08-05">5 August 2011</date>
</emphasis>
(
<typeStatus id="171CA7BECA74FFCFFAA782066BCD3A07" box="[1359,1448,340,361]" pageId="3" pageNumber="256" type="holotype">holotype</typeStatus>
: circled specimen on
<collectionCode id="AEB681D9CA74FFCFFE66822A6FB53AE3" box="[398,464,376,397]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34784" lsid="urn:lsid:biocol.org:col:34784" name="Academy of Natural Sciences of Philadelphia" pageId="3" pageNumber="256">ANSP</collectionCode>
!
<collectionCode id="AEB681D9CA74FFCFFE36822A6C653AE3" box="[478,512,376,397]" country="0" name="Goucher College" pageId="3" pageNumber="256">GC</collectionCode>
65221, illustrated in
<figureCitation id="509C0599CA74FFCFFD3A822A6D753AE3" box="[722,784,376,397]" captionStart="FIGURES 210" captionStartId="4.[136,243,1727,1748]" captionTargetBox="[225,1360,190,1685]" captionTargetId="figure-17@4.[189,1398,190,1702]" captionTargetPageId="4" captionText="FIGURES 210. Navicula volcanica, LM.3. Preserved specimen with intact chloroplasts and four large oil droplets.5. Holotype specimen. 2, 4, 610. Clearwater River, Oregon. 3, 5. North Umpqua River, Oregon. Scale bars = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13635638" httpUri="https://zenodo.org/record/13635638/files/figure.png" pageId="3" pageNumber="256">Fig. 5</figureCitation>
.
<typeStatus id="171CA7BECA74FFCFFCF6822A6D173AE3" box="[798,882,376,397]" pageId="3" pageNumber="256" type="isotype">Isotypes</typeStatus>
: circled specimens on
<collectionCode id="AEB681D9CA74FFCFFBB2822A6AD23AE3" box="[1114,1207,376,397]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15655" lsid="urn:lsid:biocol.org:col:15655" name="University of Montana" pageId="3" pageNumber="256" type="Herbarium">MONTU</collectionCode>
! 41-100, MDC! 126-94.
<typeStatus id="171CA7BECA74FFCFFF5582CE6F7B3ADF" box="[189,286,412,433]" pageId="3" pageNumber="256" type="paratype">Paratypes</typeStatus>
:
<collectionCode id="AEB681D9CA74FFCFFECF82CE6FE13ADF" box="[295,388,412,433]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15655" lsid="urn:lsid:biocol.org:col:15655" name="University of Montana" pageId="3" pageNumber="256" type="Herbarium">MONTU</collectionCode>
! 11-51, MDC! T-3-14-18).
</paragraph>
</subSubSection>
<subSubSection id="80BD4A97CA74FFCFFF6082B36BF73A94" box="[136,1426,481,506]" pageId="3" pageNumber="256" type="etymology">
<paragraph id="C818191CCA74FFCFFF6082B36BF73A94" blockId="3.[136,1452,481,830]" box="[136,1426,481,506]" pageId="3" pageNumber="256">
<emphasis id="FAD3C50ECA74FFCFFF6082B36F763A94" bold="true" box="[136,275,481,506]" pageId="3" pageNumber="256">Etymology:</emphasis>
—The specific epithet
<taxonomicName id="0FA7629FCA74FFCFFDFA82B36CE93A94" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[530,652,481,506]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFDF782B36CE93A94" box="[543,652,481,506]" italics="true" pageId="3" pageNumber="256">volcanica</emphasis>
</taxonomicName>
” refers to the general environment of this species: among volcanoes.
</paragraph>
</subSubSection>
<subSubSection id="80BD4A97CA74FFC9FF5581576DA83CAB" lastPageId="5" lastPageNumber="258" pageId="3" pageNumber="256" type="distribution">
<paragraph id="C818191CCA74FFCFFF5581576DEC3970" blockId="3.[136,1452,481,830]" box="[189,905,517,542]" pageId="3" pageNumber="256">
<emphasis id="FAD3C50ECA74FFCFFF5581576F3C3970" bold="true" box="[189,345,517,542]" pageId="3" pageNumber="256">Distribution:</emphasis>
—Clearwater and North Umpqua Rivers,
<collectingRegion id="0A63D7FECA74FFCFFCC581576DE03970" box="[813,901,517,542]" country="United States of America" name="Oregon" pageId="3" pageNumber="256">Oregon</collectingRegion>
.
</paragraph>
<paragraph id="C818191CCA74FFCFFF55817B6C2A3850" blockId="3.[136,1452,481,830]" pageId="3" pageNumber="256">
<emphasis id="FAD3C50ECA74FFCFFF55817B6F39392C" bold="true" box="[189,348,553,578]" pageId="3" pageNumber="256">Observations</emphasis>
:—When observed under LM,
<taxonomicName id="0FA7629FCA74FFCFFD54817B6DF2392C" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[700,919,553,578]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFD54817B6DF2392C" box="[700,919,553,578]" italics="true" pageId="3" pageNumber="256">Navicula volcanica</emphasis>
</taxonomicName>
is most similar to
<taxonomicName id="0FA7629FCA74FFCFFB87817B6B6F392C" box="[1135,1290,553,578]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFB87817B6AE7392C" box="[1135,1154,553,578]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFB7A817B6B6F392C" box="[1170,1290,553,578]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
(
<figureCitation id="509C0599CA74FFCFFAF2817B6BFB392C" box="[1306,1438,553,578]" captionStart-0="FIGURES 1829" captionStart-1="FIGURES 3033" captionStartId-0="6.[136,243,1727,1748]" captionStartId-1="8.[136,243,1670,1691]" captionTargetBox-0="[189,1398,190,1702]" captionTargetBox-1="[189,1398,245,1570]" captionTargetId-0="figure-17@6.[189,1398,190,1702]" captionTargetId-1="figure-17@8.[189,1398,245,1573]" captionTargetPageId-0="6" captionTargetPageId-1="8" captionText-0="FIGURES 1829. Navicula ludloviana, LM. 18. Iconotype, A. Schmidt 1876. 1922. Specimens from fossil lacustrine population near Port Ludlow, Washington (ANSP! Boyer 1060). 23, 24. Specimens from fossil lacustrine populations near Pit River, California.23. ANSP! Boyer E-2-21. 24. ANSP! Febiger 5661. 2529. Specimens from extant riverine populations in Oregon. 2527, 29: Snow Creek, Oregon. 28: Lake Creek, Oregon. Scale bars = 10 μm for all images." captionText-1="FIGURES 3033. Navicula ludloviana, SEM. Specimens from fossil lacustrine population near Pit River, California (ANSP! Boyer 338). 30, 31. External valve views. 32, 33. Internal valve views. Scale bars: Figs 30, 32, 33 = 10 μm; Fig. 31 = 2 μm." figureDoi-0="http://doi.org/10.5281/zenodo.13635642" figureDoi-1="http://doi.org/10.5281/zenodo.13635644" httpUri-0="https://zenodo.org/record/13635642/files/figure.png" httpUri-1="https://zenodo.org/record/13635644/files/figure.png" pageId="3" pageNumber="256">Figs 1833</figureCitation>
), another large
<taxonomicName id="0FA7629FCA74FFCFFEC9811F6FE33908" box="[289,390,589,614]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="genus">
<emphasis id="FAD3C50ECA74FFCFFEC9811F6FE33908" box="[289,390,589,614]" italics="true" pageId="3" pageNumber="256">Navicula</emphasis>
</taxonomicName>
with a relatively wide axial area and strongly radiate striae, but with a much wider distribution (
<tableCitation id="85252CA7CA74FFCFFF6781236E8C39E4" box="[143,233,625,650]" captionStart="TABLE 2" captionStartId="3.[136,224,914,937]" captionText="TABLE 2. New (this paper) and published distribution records for Navicula volcanica, N. ludloviana, N. subwalkeri, and N. walkeri. *Navicula walkeri was also reported from the designated locations by Kociolek et al. (1998)." pageId="3" pageNumber="256">Table 2</tableCitation>
).
<bibRefCitation id="AC3664EDCA74FFCFFF1781236C7E39E4" author="Patrick, R. &amp; Reimer, C. W." box="[255,539,625,650]" pageId="3" pageNumber="256" pagination="1 - 688" refId="ref6447" refString="Patrick, R. &amp; Reimer, C. W. (1966) The diatoms of the United States exclusive of Alaska and Hawaii. Volume 1: Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13: 1 - 688." type="book chapter" year="1966">Patrick &amp; Reimer (1966)</bibRefCitation>
reported that valves of
<taxonomicName id="0FA7629FCA74FFCFFCC481236DA239E4" box="[812,967,625,650]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFCC481236D5A39E4" box="[812,831,625,650]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFCA781236DA239E4" box="[847,967,625,650]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
are 2333 μm wide and 90132 μm long. Valves of
<taxonomicName id="0FA7629FCA74FFCFFF1481C76FEE39C0" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[252,395,661,686]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFF1481C76F6A39C0" box="[252,271,661,686]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFEF681C76FEE39C0" box="[286,395,661,686]" italics="true" pageId="3" pageNumber="256">volcanica</emphasis>
</taxonomicName>
are larger than those of
<taxonomicName id="0FA7629FCA74FFCFFD4E81C76D2539C0" box="[678,832,661,686]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFD4E81C76CDC39C0" box="[678,697,661,686]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFD2081C76D2539C0" box="[712,832,661,686]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
, even considering the larger
<taxonomicName id="0FA7629FCA74FFCFFB6681C76B4D39C0" box="[1166,1320,661,686]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFB6681C76AC439C0" box="[1166,1185,661,686]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFB5881C76B4D39C0" box="[1200,1320,661,686]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
valves that we observed (
<tableCitation id="85252CA7CA74FFCFFECB81EB6F1F39BC" box="[291,378,697,722]" captionStart="TABLE 3" captionStartId="7.[136,224,159,182]" captionText="TABLE 3. Diagnostic features, habitat, ecology, and geographic and temporal distributions of N. volcanica and N. subwalkeri compared to similar species. Distinguishing diagnostic features are given in bold face type. Distribution key: CA = California, OR = Oregon, WA = Washington. Sources: Bahls (2011d); Kociolek et al. (1998); Lange-Bertalot (2001); Mahood (1981); Patrick &amp; Reimer (1966); A. Schmidt et al. (18741959); Sovereign (1958); VanLandingham (1990); and specimens presented in this paper." pageId="3" pageNumber="256">Table 3</tableCitation>
). Our images also show that valves of
<taxonomicName id="0FA7629FCA74FFCFFCC581EB6DA039BC" box="[813,965,697,722]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFCC581EB6D2539BC" box="[813,832,697,722]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFCA581EB6DA039BC" box="[845,965,697,722]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
near the upper size limit have very narrow, attenuated apices (
<figureCitation id="509C0599CA74FFCFFEB7818F6FDD3998" box="[351,440,733,758]" captionStart="FIGURES 1829" captionStartId="6.[136,243,1727,1748]" captionTargetBox="[189,1398,190,1702]" captionTargetId="figure-17@6.[189,1398,190,1702]" captionTargetPageId="6" captionText="FIGURES 1829. Navicula ludloviana, LM. 18. Iconotype, A. Schmidt 1876. 1922. Specimens from fossil lacustrine population near Port Ludlow, Washington (ANSP! Boyer 1060). 23, 24. Specimens from fossil lacustrine populations near Pit River, California.23. ANSP! Boyer E-2-21. 24. ANSP! Febiger 5661. 2529. Specimens from extant riverine populations in Oregon. 2527, 29: Snow Creek, Oregon. 28: Lake Creek, Oregon. Scale bars = 10 μm for all images." figureDoi="http://doi.org/10.5281/zenodo.13635642" httpUri="https://zenodo.org/record/13635642/files/figure.png" pageId="3" pageNumber="256">Fig. 22</figureCitation>
). In smaller specimens, valve apices in
<taxonomicName id="0FA7629FCA74FFCFFC67818F6A493998" box="[911,1068,733,758]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFC67818F6DC73998" box="[911,930,733,758]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFC5C818F6A493998" box="[948,1068,733,758]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
are subrostrate, but they are not protracted at all in
<taxonomicName id="0FA7629FCA74FFCFFEBF80536F813874" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[343,484,769,794]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFEBF80536F0F3874" box="[343,362,769,794]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFE9F80536F813874" box="[375,484,769,794]" italics="true" pageId="3" pageNumber="256">volcanica</emphasis>
</taxonomicName>
, even in the largest specimens (
<figureCitation id="509C0599CA74FFCFFCAA80536DE23874" box="[834,903,769,794]" captionStart="FIGURES 210" captionStartId="4.[136,243,1727,1748]" captionTargetBox="[225,1360,190,1685]" captionTargetId="figure-17@4.[189,1398,190,1702]" captionTargetPageId="4" captionText="FIGURES 210. Navicula volcanica, LM.3. Preserved specimen with intact chloroplasts and four large oil droplets.5. Holotype specimen. 2, 4, 610. Clearwater River, Oregon. 3, 5. North Umpqua River, Oregon. Scale bars = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13635638" httpUri="https://zenodo.org/record/13635638/files/figure.png" pageId="3" pageNumber="256">Fig. 2</figureCitation>
). Valves of
<taxonomicName id="0FA7629FCA74FFCFFBEF80536AF13874" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[1031,1172,769,794]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFBEF80536A7F3874" box="[1031,1050,769,794]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFBCF80536AF13874" box="[1063,1172,769,794]" italics="true" pageId="3" pageNumber="256">volcanica</emphasis>
</taxonomicName>
are rhombic, while those of
<taxonomicName id="0FA7629FCA74FFCFFF4E80776F5A3850" box="[166,319,805,830]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFF4E80776EDC3850" box="[166,185,805,830]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFF2F80776F5A3850" box="[199,319,805,830]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
are rhombic-lanceolate.
</paragraph>
<caption id="9CD84994CA74FFCFFF6080C06AA238A3" pageId="3" pageNumber="256" startId="3.[136,224,914,937]" targetType="table">
<paragraph id="C818191CCA74FFCFFF6080C06AA238A3" blockId="3.[136,1452,914,973]" pageId="3" pageNumber="256">
<emphasis id="FAD3C50ECA74FFCFFF6080C06E9F38C7" bold="true" box="[136,250,914,937]" pageId="3" pageNumber="256">TABLE 2.</emphasis>
New (this paper) and published distribution records for
<taxonomicName id="0FA7629FCA74FFCFFCA680C06A7938C7" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[846,1052,914,937]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFCA680C06A7938C7" box="[846,1052,914,937]" italics="true" pageId="3" pageNumber="256">Navicula volcanica</emphasis>
</taxonomicName>
,
<taxonomicName id="0FA7629FCA74FFCFFBC180C06ADC38C7" box="[1065,1209,914,937]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFBC180C06A5E38C7" box="[1065,1083,914,937]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFBAF80C06ADC38C7" box="[1095,1209,914,937]" italics="true" pageId="3" pageNumber="256">ludloviana</emphasis>
</taxonomicName>
,
<taxonomicName id="0FA7629FCA74FFCFFB2E80C06B3F38C7" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[1222,1370,914,937]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="subwalkeri">
<emphasis id="FAD3C50ECA74FFCFFB2E80C06ABD38C7" box="[1222,1240,914,937]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFB0D80C06B3F38C7" box="[1253,1370,914,937]" italics="true" pageId="3" pageNumber="256">subwalkeri</emphasis>
</taxonomicName>
, and
<taxonomicName id="0FA7629FCA74FFCFFA7B80C06EBD38A3" authorityName="Sovereign" authorityYear="1958" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="walkeri">
<emphasis id="FAD3C50ECA74FFCFFA7B80C06BC038C7" box="[1427,1445,914,937]" italics="true" pageId="3" pageNumber="256">N</emphasis>
.
<emphasis id="FAD3C50ECA74FFCFFF6080E46EBD38A3" box="[136,216,950,973]" italics="true" pageId="3" pageNumber="256">walkeri</emphasis>
</taxonomicName>
. *
<taxonomicName id="0FA7629FCA74FFCFFF1B80E46FCF38A3" authorityName="Sovereign" authorityYear="1958" box="[243,426,950,973]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="walkeri">
<emphasis id="FAD3C50ECA74FFCFFF1B80E46FCF38A3" box="[243,426,950,973]" italics="true" pageId="3" pageNumber="256">Navicula walkeri</emphasis>
</taxonomicName>
was also reported from the designated locations by
<bibRefCitation id="AC3664EDCA74FFCFFC3C80E46AA638A3" author="Kociolek, J. P. &amp; Spaulding, S. A. &amp; Kingston, J. C." box="[980,1219,950,973]" pageId="3" pageNumber="256" pagination="235 - 245" refId="ref6210" refString="Kociolek, J. P., Spaulding, S. A., &amp; Kingston, J. C. (1998) Valve morphology and systematic position of Navicula walkeri (Bacillariophyceae), a diatom endemic to Oregon and California (USA). Nova Hedwigia 67: 235 - 245." type="journal article" year="1998">
Kociolek
<emphasis id="FAD3C50ECA74FFCFFBD580E46A0938A3" box="[1085,1132,950,973]" italics="true" pageId="3" pageNumber="256">et al</emphasis>
. (1998)
</bibRefCitation>
.
</paragraph>
</caption>
<paragraph id="C818191CCA74FFCFFF7880896DD53CA7" pageId="3" pageNumber="256">
<table id="BAA7EBBCCA740033FF7880896BFC3CA7" box="[144,1433,987,1993]" gridcols="5" gridrows="32" pageId="3" pageNumber="256">
<tr id="76971B5ECA740033FF7880896BFC389E" box="[144,1433,987,1008]" gridrow="0" pageId="3" pageNumber="256">
<th id="35467222CA740033FF7880896F86389E" box="[144,483,987,1008]" gridcol="0" gridrow="0" pageId="3" pageNumber="256">Locality</th>
<th id="35467222CA740033FDD280896C91389E" box="[570,756,987,1008]" gridcol="1" gridrow="0" pageId="3" pageNumber="256">
<taxonomicName id="0FA7629FCA74FFCFFDD280896C91389E" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[570,756,987,1008]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA74FFCFFDD280896C91389E" box="[570,756,987,1008]" italics="true" pageId="3" pageNumber="256">Navicula volcanica</emphasis>
</taxonomicName>
</th>
<th id="35467222CA740033FCF180896DBB389E" box="[793,990,987,1008]" gridcol="2" gridrow="0" pageId="3" pageNumber="256">
<taxonomicName id="0FA7629FCA74FFCFFCF180896DB9389E" box="[793,988,987,1008]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA74FFCFFCF180896DB9389E" box="[793,988,987,1008]" italics="true" pageId="3" pageNumber="256">Navicula ludloviana</emphasis>
</taxonomicName>
</th>
<th id="35467222CA740033FC1F80896AD9389E" box="[1015,1212,987,1008]" gridcol="3" gridrow="0" pageId="3" pageNumber="256">
<taxonomicName id="0FA7629FCA74FFCFFC1F80896AD9389E" authorityName="Bahls &amp; Potapova" authorityYear="2015" box="[1015,1212,987,1008]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="subwalkeri">
<emphasis id="FAD3C50ECA74FFCFFC1F80896AD9389E" box="[1015,1212,987,1008]" italics="true" pageId="3" pageNumber="256">Navicula subwalkeri</emphasis>
</taxonomicName>
</th>
<th id="35467222CA740033FB3D80896BFC389E" box="[1237,1433,987,1008]" gridcol="4" gridrow="0" pageId="3" pageNumber="256">
<taxonomicName id="0FA7629FCA74FFCFFB3D80896B1F389E" authority="Fossil Chiloquin, OR ANSP" authorityName="Fossil Chiloquin, OR ANSP" box="[1237,1402,987,1008]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="3" pageNumber="256" phylum="Ochrophyta" rank="species" species="walkeri">
<emphasis id="FAD3C50ECA74FFCFFB3D80896B1F389E" box="[1237,1402,987,1008]" italics="true" pageId="3" pageNumber="256">Navicula walkeri</emphasis>
</taxonomicName>
</th>
</tr>
<tr id="76971B5ECA740033FF7880A96BFC3F7E" box="[144,1433,1019,1040]" gridrow="1" pageId="3" pageNumber="256">
<th id="35467222CA740033FF7880A96BFC3F7E" box="[144,1433,1019,1040]" colspan="5" colspanRight="4" gridcol="0" gridrow="1" pageId="3" pageNumber="256">Fossil</th>
</tr>
<tr id="76971B5ECA740033FF7887496BFC3F5E" box="[144,1433,1051,1072]" gridrow="2" pageId="3" pageNumber="256" rowspan-1="1">
<th id="35467222CA740033FF7887496F863F5E" box="[144,483,1051,1072]" gridcol="0" gridrow="2" pageId="3" pageNumber="256">Chiloquin, OR</th>
<td id="35467222CA740033FCF187496DBB3F5E" box="[793,990,1051,1072]" gridcol="2" gridrow="2" pageId="3" pageNumber="256">ANSP! GC63230</td>
<td id="35467222CA740033FC1F87496AD93F5E" box="[1015,1212,1051,1072]" gridcol="3" gridrow="2" pageId="3" pageNumber="256">ANSP! GC63230</td>
<td id="35467222CA740033FB3D87496BFC3F5E" box="[1237,1433,1051,1072]" gridcol="4" gridrow="2" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D87496BFC3F5E" author="Kociolek, J. P. &amp; Spaulding, S. A. &amp; Kingston, J. C." box="[1237,1433,1051,1072]" pageId="3" pageNumber="256" pagination="235 - 245" refId="ref6210" refString="Kociolek, J. P., Spaulding, S. A., &amp; Kingston, J. C. (1998) Valve morphology and systematic position of Navicula walkeri (Bacillariophyceae), a diatom endemic to Oregon and California (USA). Nova Hedwigia 67: 235 - 245." type="journal article" year="1998">
Kociolek
<emphasis id="FAD3C50ECA74FFCFFADB87496B383F5E" box="[1331,1373,1051,1072]" italics="true" pageId="3" pageNumber="256">et al</emphasis>
. 1998
</bibRefCitation>
</td>
</tr>
<tr id="76971B5ECA740033FF7887686BFC3F21" box="[144,1433,1082,1103]" gridrow="3" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7887686F863F21" box="[144,483,1082,1103]" gridcol="0" gridrow="3" pageId="3" pageNumber="256">Columbia River, OR/WA</th>
<td id="35467222CA740033FCF187686DBB3F21" box="[793,990,1082,1103]" gridcol="2" gridrow="3" pageId="3" pageNumber="256">ANSP! Boyer K-3-7</td>
</tr>
<tr id="76971B5ECA740033FF7887086BFC3F01" box="[144,1433,1114,1135]" gridrow="4" pageId="3" pageNumber="256">
<th id="35467222CA740033FF7887086BFC3F01" box="[144,1433,1114,1135]" colspan="5" colspanRight="4" gridcol="0" gridrow="4" pageId="3" pageNumber="256">Pit River, CA</th>
</tr>
<tr id="76971B5ECA740033FF7887286BFC3FE1" box="[144,1433,1146,1167]" gridrow="5" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7887286F863FE1" box="[144,483,1146,1167]" gridcol="0" gridrow="5" pageId="3" pageNumber="256">ANSP! Boyer 338</th>
<td id="35467222CA740033FCF187286DBB3FE1" box="[793,990,1146,1167]" gridcol="2" gridrow="5" pageId="3" pageNumber="256">X</td>
<td id="35467222CA740033FB3D87286BFC3FE1" box="[1237,1433,1146,1167]" gridcol="4" gridrow="5" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7887C86BFC3FC1" box="[144,1433,1178,1199]" gridrow="6" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7887C86F863FC1" box="[144,483,1178,1199]" gridcol="0" gridrow="6" pageId="3" pageNumber="256">ANSP! Boyer E-2-21</th>
<td id="35467222CA740033FCF187C86DBB3FC1" box="[793,990,1178,1199]" gridcol="2" gridrow="6" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7887EB6BFC3FA0" box="[144,1433,1209,1230]" gridrow="7" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7887EB6F863FA0" box="[144,483,1209,1230]" gridcol="0" gridrow="7" pageId="3" pageNumber="256">ANSP! Febiger 4435, 5660, 5661</th>
<td id="35467222CA740033FCF187EB6DBB3FA0" box="[793,990,1209,1230]" gridcol="2" gridrow="7" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF78878B6BFC3F80" box="[144,1433,1241,1262]" gridrow="8" pageId="3" pageNumber="256">
<th id="35467222CA740033FF78878B6BFC3F80" box="[144,1433,1241,1262]" colspan="5" colspanRight="4" gridcol="0" gridrow="8" pageId="3" pageNumber="256">Port Ludlow, WA</th>
</tr>
<tr id="76971B5ECA740033FF7887AB6BFC3E60" box="[144,1433,1273,1294]" gridrow="9" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7887AB6F863E60" box="[144,483,1273,1294]" gridcol="0" gridrow="9" pageId="3" pageNumber="256">ANSP! Boyer 1060</th>
<td id="35467222CA740033FCF187AB6DBB3E60" box="[793,990,1273,1294]" gridcol="2" gridrow="9" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF78864B6BFC3E40" box="[144,1433,1305,1326]" gridrow="10" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF78864B6F863E40" box="[144,483,1305,1326]" gridcol="0" gridrow="10" pageId="3" pageNumber="256">
Schmidt
<emphasis id="FAD3C50ECA74FFCFFF10864B6F473E40" box="[248,290,1305,1326]" italics="true" pageId="3" pageNumber="256">et al</emphasis>
. 1876
</th>
<td id="35467222CA740033FCF1864B6DBB3E40" box="[793,990,1305,1326]" gridcol="2" gridrow="10" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF78866A6BFC3E23" box="[144,1433,1336,1357]" gridrow="11" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF78866A6F863E23" box="[144,483,1336,1357]" gridcol="0" gridrow="11" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFF4A866A6F5C3E23" author="Sovereign, H. E." box="[162,313,1336,1357]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</th>
<td id="35467222CA740033FCF1866A6DBB3E23" box="[793,990,1336,1357]" gridcol="2" gridrow="11" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF78860A6BFC3E03" box="[144,1433,1368,1389]" gridrow="12" pageId="3" pageNumber="256">
<th id="35467222CA740033FF78860A6BFC3E03" box="[144,1433,1368,1389]" colspan="5" colspanRight="4" gridcol="0" gridrow="12" pageId="3" pageNumber="256">Terrebonne, OR</th>
</tr>
<tr id="76971B5ECA740033FF78862A6BFC3EE3" box="[144,1433,1400,1421]" gridrow="13" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF78862A6F863EE3" box="[144,483,1400,1421]" gridcol="0" gridrow="13" pageId="3" pageNumber="256">ANSP! GC6407</th>
<td id="35467222CA740033FB3D862A6BFC3EE3" box="[1237,1433,1400,1421]" gridcol="4" gridrow="13" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7886CA6BFC3EC3" box="[144,1433,1432,1453]" gridrow="14" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7886CA6F863EC3" box="[144,483,1432,1453]" gridcol="0" gridrow="14" pageId="3" pageNumber="256">ANSP! GC64503</th>
<td id="35467222CA740033FCF186CA6DBB3EC3" box="[793,990,1432,1453]" gridcol="2" gridrow="14" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7886EA6BFC3EA3" box="[144,1433,1464,1485]" gridrow="15" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7886EA6F863EA3" box="[144,483,1464,1485]" gridcol="0" gridrow="15" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFF4A86EA6F033EA3" author="Kociolek, J. P. &amp; Spaulding, S. A. &amp; Kingston, J. C." box="[162,358,1464,1485]" pageId="3" pageNumber="256" pagination="235 - 245" refId="ref6210" refString="Kociolek, J. P., Spaulding, S. A., &amp; Kingston, J. C. (1998) Valve morphology and systematic position of Navicula walkeri (Bacillariophyceae), a diatom endemic to Oregon and California (USA). Nova Hedwigia 67: 235 - 245." type="journal article" year="1998">
Kociolek
<emphasis id="FAD3C50ECA74FFCFFEE886EA6F4F3EA3" box="[256,298,1464,1485]" italics="true" pageId="3" pageNumber="256">et al</emphasis>
. 1998
</bibRefCitation>
</th>
<td id="35467222CA740033FB3D86EA6BFC3EA3" box="[1237,1433,1464,1485]" gridcol="4" gridrow="15" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7886856BFC3E82" box="[144,1433,1495,1516]" gridrow="16" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7886856F863E82" box="[144,483,1495,1516]" gridcol="0" gridrow="16" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFF4A86856F5C3E82" author="Sovereign, H. E." box="[162,313,1495,1516]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</th>
<td id="35467222CA740033FB3D86856BFC3E82" box="[1237,1433,1495,1516]" gridcol="4" gridrow="16" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7886A56BFC3D62" box="[144,1433,1527,1548]" gridrow="17" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7886A56F863D62" box="[144,483,1527,1548]" gridcol="0" gridrow="17" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFF4986A56F133D62" author="VanLandingham, S. L." box="[161,374,1527,1548]" pageId="3" pageNumber="256" pagination="182 - 196" refId="ref6625" refString="VanLandingham, S. L. (1990) Observations on the biostratigraphy of Pliocene and Pleistocene diatomites from the Terrebonne District, Deschutes County, Oregon. Micropaleontology 36 (2): 182 - 196. http: // dx. doi. org / 10.2307 / 1485503" type="journal article" year="1990">VanLandingham 1990</bibRefCitation>
</th>
<td id="35467222CA740033FCF186A56DBB3D62" box="[793,990,1527,1548]" gridcol="2" gridrow="17" pageId="3" pageNumber="256">X</td>
<td id="35467222CA740033FB3D86A56BFC3D62" box="[1237,1433,1527,1548]" gridcol="4" gridrow="17" pageId="3" pageNumber="256">X</td>
</tr>
<tr id="76971B5ECA740033FF7885456BFC3D42" box="[144,1433,1559,1580]" gridrow="18" pageId="3" pageNumber="256">
<th id="35467222CA740033FF7885456BFC3D42" box="[144,1433,1559,1580]" colspan="5" colspanRight="4" gridcol="0" gridrow="18" pageId="3" pageNumber="256">Recent</th>
</tr>
<tr id="76971B5ECA740033FF7885656BFC3D22" box="[144,1433,1591,1612]" gridrow="19" pageId="3" pageNumber="256" rowspan-2="1" rowspan-4="1">
<th id="35467222CA740033FF7885656F863D22" box="[144,483,1591,1612]" gridcol="0" gridrow="19" pageId="3" pageNumber="256">Clearwater River, OR</th>
<td id="35467222CA740033FDD285656C913D22" box="[570,756,1591,1612]" gridcol="1" gridrow="19" pageId="3" pageNumber="256">MONTU! 11-51</td>
<td id="35467222CA740033FC1F85656AD93D22" box="[1015,1212,1591,1612]" gridcol="3" gridrow="19" pageId="3" pageNumber="256">MONTU! 11-51</td>
</tr>
<tr id="76971B5ECA740033FF7885046BFC3D05" box="[144,1433,1622,1643]" gridrow="20" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7885046F863D05" box="[144,483,1622,1643]" gridcol="0" gridrow="20" pageId="3" pageNumber="256">Crater Lake, OR</th>
<td id="35467222CA740033FB3D85046BFC3D05" box="[1237,1433,1622,1643]" gridcol="4" gridrow="20" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D85046B0B3D05" author="Sovereign, H. E." box="[1237,1390,1622,1643]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
, *
</td>
</tr>
<tr id="76971B5ECA740033FF7885246BFC3DE5" box="[144,1433,1654,1675]" gridrow="21" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7885246F863DE5" box="[144,483,1654,1675]" gridcol="0" gridrow="21" pageId="3" pageNumber="256">Diamond Lake, OR</th>
<td id="35467222CA740033FCF185246DBB3DE5" box="[793,990,1654,1675]" gridcol="2" gridrow="21" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFCF185246DD53DE5" author="Sovereign, H. E." box="[793,944,1654,1675]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</td>
<td id="35467222CA740033FB3D85246BFC3DE5" box="[1237,1433,1654,1675]" gridcol="4" gridrow="21" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D85246B0B3DE5" author="Sovereign, H. E." box="[1237,1390,1654,1675]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
, *
</td>
</tr>
<tr id="76971B5ECA740033FF7885C46BFC3DC5" box="[144,1433,1686,1707]" gridrow="22" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7885C46F863DC5" box="[144,483,1686,1707]" gridcol="0" gridrow="22" pageId="3" pageNumber="256">Emerald Pool (Crater Lake), OR</th>
<td id="35467222CA740033FCF185C46DBB3DC5" box="[793,990,1686,1707]" gridcol="2" gridrow="22" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFCF185C46DD53DC5" author="Sovereign, H. E." box="[793,944,1686,1707]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</td>
<td id="35467222CA740033FB3D85C46BFC3DC5" box="[1237,1433,1686,1707]" gridcol="4" gridrow="22" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D85C46B0B3DC5" author="Sovereign, H. E." box="[1237,1390,1686,1707]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
, *
</td>
</tr>
<tr id="76971B5ECA740033FF7885E46BFC3DA5" box="[144,1433,1718,1739]" gridrow="23" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7885E46F863DA5" box="[144,483,1718,1739]" gridcol="0" gridrow="23" pageId="3" pageNumber="256">Jackson Creek, OR</th>
<td id="35467222CA740033FB3D85E46BFC3DA5" box="[1237,1433,1718,1739]" gridcol="4" gridrow="23" pageId="3" pageNumber="256">MONTU! 11-29</td>
</tr>
<tr id="76971B5ECA740033FF7885876BFC3D84" box="[144,1433,1749,1770]" gridrow="24" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7885876F863D84" box="[144,483,1749,1770]" gridcol="0" gridrow="24" pageId="3" pageNumber="256">Lake Creek, OR</th>
<td id="35467222CA740033FCF185876DBB3D84" box="[793,990,1749,1770]" gridcol="2" gridrow="24" pageId="3" pageNumber="256">MONTU! 42-1</td>
<td id="35467222CA740033FB3D85876BFC3D84" box="[1237,1433,1749,1770]" gridcol="4" gridrow="24" pageId="3" pageNumber="256">MONTU! 42-1</td>
</tr>
<tr id="76971B5ECA740033FF7885A76BFC3C64" box="[144,1433,1781,1802]" gridrow="25" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7885A76F863C64" box="[144,483,1781,1802]" gridcol="0" gridrow="25" pageId="3" pageNumber="256">Lake Washington, WA</th>
<td id="35467222CA740033FCF185A76DBB3C64" box="[793,990,1781,1802]" gridcol="2" gridrow="25" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFCF185A76DD53C64" author="Sovereign, H. E." box="[793,944,1781,1802]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</td>
<td id="35467222CA740033FB3D85A76BFC3C64" box="[1237,1433,1781,1802]" gridcol="4" gridrow="25" pageId="3" pageNumber="256">MONTU! 48-76</td>
</tr>
<tr id="76971B5ECA740033FF7884476BFC3C44" box="[144,1433,1813,1834]" gridrow="26" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7884476F863C44" box="[144,483,1813,1834]" gridcol="0" gridrow="26" pageId="3" pageNumber="256">Merced River, CA</th>
<td id="35467222CA740033FB3D84476BFC3C44" box="[1237,1433,1813,1834]" gridcol="4" gridrow="26" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D84476BFC3C44" author="Kociolek, J. P. &amp; Spaulding, S. A. &amp; Kingston, J. C." box="[1237,1433,1813,1834]" pageId="3" pageNumber="256" pagination="235 - 245" refId="ref6210" refString="Kociolek, J. P., Spaulding, S. A., &amp; Kingston, J. C. (1998) Valve morphology and systematic position of Navicula walkeri (Bacillariophyceae), a diatom endemic to Oregon and California (USA). Nova Hedwigia 67: 235 - 245." type="journal article" year="1998">
Kociolek
<emphasis id="FAD3C50ECA74FFCFFADB84476B383C44" box="[1331,1373,1813,1834]" italics="true" pageId="3" pageNumber="256">et al</emphasis>
. 1998
</bibRefCitation>
</td>
</tr>
<tr id="76971B5ECA740033FF7884676BFC3C24" box="[144,1433,1845,1866]" gridrow="27" pageId="3" pageNumber="256" rowspan-2="1">
<th id="35467222CA740033FF7884676F863C24" box="[144,483,1845,1866]" gridcol="0" gridrow="27" pageId="3" pageNumber="256">North Umpqua River, OR</th>
<td id="35467222CA740033FDD284676C913C24" box="[570,756,1845,1866]" gridcol="1" gridrow="27" pageId="3" pageNumber="256">ANSP! GC65221</td>
<td id="35467222CA740033FC1F84676AD93C24" box="[1015,1212,1845,1866]" gridcol="3" gridrow="27" pageId="3" pageNumber="256">ANSP! GC65222</td>
<td id="35467222CA740033FB3D84676BFC3C24" box="[1237,1433,1845,1866]" gridcol="4" gridrow="27" pageId="3" pageNumber="256">MONTU! 41-100</td>
</tr>
<tr id="76971B5ECA740033FF7884066BFC3C07" box="[144,1433,1876,1897]" gridrow="28" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7884066F863C07" box="[144,483,1876,1897]" gridcol="0" gridrow="28" pageId="3" pageNumber="256">Quartzville Creek, OR</th>
<td id="35467222CA740033FB3D84066BFC3C07" box="[1237,1433,1876,1897]" gridcol="4" gridrow="28" pageId="3" pageNumber="256">MONTU! 17-53</td>
</tr>
<tr id="76971B5ECA740033FF7884266BFC3CE7" box="[144,1433,1908,1929]" gridrow="29" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1">
<th id="35467222CA740033FF7884266F863CE7" box="[144,483,1908,1929]" gridcol="0" gridrow="29" pageId="3" pageNumber="256">Snow Creek, OR</th>
<td id="35467222CA740033FCF184266DBB3CE7" box="[793,990,1908,1929]" gridcol="2" gridrow="29" pageId="3" pageNumber="256">MONTU! 17-66</td>
<td id="35467222CA740033FB3D84266BFC3CE7" box="[1237,1433,1908,1929]" gridcol="4" gridrow="29" pageId="3" pageNumber="256">MONTU! 17-66</td>
</tr>
<tr id="76971B5ECA740033FF7884C66BFC3CC7" box="[144,1433,1940,1961]" gridrow="30" pageId="3" pageNumber="256" rowspan-1="1" rowspan-2="1" rowspan-3="1">
<th id="35467222CA740033FF7884C66F863CC7" box="[144,483,1940,1961]" gridcol="0" gridrow="30" pageId="3" pageNumber="256">Spring Creek, OR</th>
<td id="35467222CA740033FB3D84C66BFC3CC7" box="[1237,1433,1940,1961]" gridcol="4" gridrow="30" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFB3D84C66B0B3CC7" author="Sovereign, H. E." box="[1237,1390,1940,1961]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
, *
</td>
</tr>
<tr id="76971B5ECA740033FF7884E66BFC3CA7" box="[144,1433,1972,1993]" gridrow="31" pageId="3" pageNumber="256" rowspan-1="1" rowspan-3="1" rowspan-4="1">
<th id="35467222CA740033FF7884E66F863CA7" box="[144,483,1972,1993]" gridcol="0" gridrow="31" pageId="3" pageNumber="256">Upper Klamath Lake, OR</th>
<td id="35467222CA740033FCF184E66DBB3CA7" box="[793,990,1972,1993]" gridcol="2" gridrow="31" pageId="3" pageNumber="256">
<bibRefCitation id="AC3664EDCA74FFCFFCF184E66DD53CA7" author="Sovereign, H. E." box="[793,944,1972,1993]" pageId="3" pageNumber="256" pagination="96 - 134" refId="ref6547" refString="Sovereign, H. E. (1958) The diatoms of Crater Lake, Oregon. Transactions of the American Microscopical Society 77: 96 - 134. http: // dx. doi. org / 10.2307 / 3224112" type="journal article" year="1958">Sovereign 1958</bibRefCitation>
</td>
</tr>
</table>
</paragraph>
<caption id="9CD84994CA73FFC8FF6085ED6A763D96" ID-DOI="http://doi.org/10.5281/zenodo.13635638" ID-Zenodo-Dep="13635638" httpUri="https://zenodo.org/record/13635638/files/figure.png" pageId="4" pageNumber="257" startId="4.[136,243,1727,1748]" targetBox="[225,1360,190,1685]" targetPageId="4" targetType="figure">
<paragraph id="C818191CCA73FFC8FF6085ED6A763D96" blockId="4.[136,1453,1727,1784]" pageId="4" pageNumber="257">
<emphasis id="FAD3C50ECA73FFC8FF6085ED6F483DBA" bold="true" box="[136,301,1727,1748]" pageId="4" pageNumber="257">FIGURES 210.</emphasis>
<taxonomicName id="0FA7629FCA73FFC8FED985ED6C7A3DBA" authority=", LM." authorityName="LM." box="[305,543,1727,1748]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA73FFC8FED985ED6F8C3DBA" box="[305,489,1727,1748]" italics="true" pageId="4" pageNumber="257">Navicula volcanica</emphasis>
, LM.
</taxonomicName>
3. Preserved specimen with intact chloroplasts and four large oil droplets. 5. Holotype specimen. 2, 4, 610. Clearwater River, Oregon. 3, 5. North Umpqua River, Oregon. Scale bars = 10 μm.
</paragraph>
</caption>
<paragraph id="C818191CCA73FFC9FF55841E6F393A27" blockId="4.[136,1452,1868,2073]" lastBlockId="5.[136,1452,160,329]" lastPageId="5" lastPageNumber="258" pageId="4" pageNumber="257">
The similarity of these two species is superficial, however, as the ultrastructure of
<taxonomicName id="0FA7629FCA73FFC8FBB1841E6A823C0B" box="[1113,1255,1868,1893]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA73FFC8FBB1841E6A093C0B" box="[1113,1132,1868,1893]" italics="true" pageId="4" pageNumber="257">N</emphasis>
.
<emphasis id="FAD3C50ECA73FFC8FB92841E6A823C0B" box="[1146,1255,1868,1893]" italics="true" pageId="4" pageNumber="257">volcanica</emphasis>
</taxonomicName>
sets it apart from other known
<taxonomicName id="0FA7629FCA73FFC8FEC984226FE33CE7" box="[289,390,1904,1929]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="genus">
<emphasis id="FAD3C50ECA73FFC8FEC984226FE33CE7" box="[289,390,1904,1929]" italics="true" pageId="4" pageNumber="257">Navicula</emphasis>
</taxonomicName>
taxa. Our SEM images of
<taxonomicName id="0FA7629FCA73FFC8FD2984226D393CE7" box="[705,860,1904,1929]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="species" species="ludloviana">
<emphasis id="FAD3C50ECA73FFC8FD2984226CB13CE7" box="[705,724,1904,1929]" italics="true" pageId="4" pageNumber="257">N</emphasis>
.
<emphasis id="FAD3C50ECA73FFC8FD0C84226D393CE7" box="[740,860,1904,1929]" italics="true" pageId="4" pageNumber="257">ludloviana</emphasis>
</taxonomicName>
(
<figureCitation id="509C0599CA73FFC8FC8584226D953CE7" box="[877,1008,1904,1929]" captionStart="FIGURES 3033" captionStartId="8.[136,243,1670,1691]" captionTargetBox="[189,1398,245,1570]" captionTargetId="figure-17@8.[189,1398,245,1573]" captionTargetPageId="8" captionText="FIGURES 3033. Navicula ludloviana, SEM. Specimens from fossil lacustrine population near Pit River, California (ANSP! Boyer 338). 30, 31. External valve views. 32, 33. Internal valve views. Scale bars: Figs 30, 32, 33 = 10 μm; Fig. 31 = 2 μm." figureDoi="http://doi.org/10.5281/zenodo.13635644" httpUri="https://zenodo.org/record/13635644/files/figure.png" pageId="4" pageNumber="257">Figs 3033</figureCitation>
) show that its frustular morphology is typical of
<taxonomicName id="0FA7629FCA73FFC8FF1584C66F073CC3" box="[253,354,1940,1965]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="genus" sensu="stricto">
<emphasis id="FAD3C50ECA73FFC8FF1584C66F073CC3" box="[253,354,1940,1965]" italics="true" pageId="4" pageNumber="257">Navicula</emphasis>
</taxonomicName>
<taxonomicNameLabel id="E1E07875CA73FFC8FE8384C66F9D3CC3" box="[363,504,1940,1965]" pageId="4" pageNumber="257" sensu="stricto">sensu stricto</taxonomicNameLabel>
in that external and internal areolae openings are approximately the same size and shape and striae internally are rather shallow troughs. Internally, striae of
<taxonomicName id="0FA7629FCA73FFC8FC3384EA6A0E3CBF" box="[987,1131,1976,2001]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="4" pageNumber="257" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA73FFC8FC3384EA6D8B3CBF" box="[987,1006,1976,2001]" italics="true" pageId="4" pageNumber="257">N</emphasis>
.
<emphasis id="FAD3C50ECA73FFC8FC1684EA6A0E3CBF" box="[1022,1131,1976,2001]" italics="true" pageId="4" pageNumber="257">volcanica</emphasis>
</taxonomicName>
are extremely deep troughs and the virgae between them are inflated, so that the internal openings of areolae are partially obscured (
<figureCitation id="509C0599CA73FFC8FAF4848E6BFA3C9B" box="[1308,1439,2012,2037]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="4" pageNumber="257">Figs 1517</figureCitation>
). The internal openings of areolae are apically elongated and constricted in the middle. The median constriction of each areola corresponds to a median thickening of adjacent intercostal ribs (
<figureCitation id="509C0599CA72FFC9FC4E83F26D9F3BD7" box="[934,1018,160,185]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Fig. 17</figureCitation>
). The hymens that occlude the areolae internally bulge out slightly above the internal surface of the striae (
<figureCitation id="509C0599CA72FFC9FC7083966A7B3BB3" box="[920,1054,196,221]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Figs 15, 17</figureCitation>
). The external openings of areolae merge into a narrow slit (
<figureCitation id="509C0599CA72FFC9FE4A83BA6C443A6F" box="[418,545,232,257]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Figs 11, 12</figureCitation>
) running the length of each stria. The slit is often interrupted, especially near the central and axial areas, creating what appear to be individual transapically elongated to isodiametric external areolae openings (
<figureCitation id="509C0599CA72FFC9FF1482626F2B3A27" box="[252,334,304,329]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Fig. 11</figureCitation>
).
</paragraph>
<caption id="9CD84994CA72FFC9FF6085E16D093D82" ID-DOI="http://doi.org/10.5281/zenodo.13635640" ID-Zenodo-Dep="13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258" startId="5.[136,243,1715,1736]" targetBox="[189,1398,389,1687]" targetPageId="5" targetType="figure">
<paragraph id="C818191CCA72FFC9FF6085E16D093D82" blockId="5.[136,1452,1715,1772]" pageId="5" pageNumber="258">
<emphasis id="FAD3C50ECA72FFC9FF6085E16F5F3DA6" bold="true" box="[136,314,1715,1736]" pageId="5" pageNumber="258">FIGURES 1117.</emphasis>
<taxonomicName id="0FA7629FCA72FFC9FEA985E16C583DA6" authority=", SEM" authorityName="SEM" box="[321,573,1715,1736]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="5" pageNumber="258" phylum="Ochrophyta" rank="species" species="volcanica">
<emphasis id="FAD3C50ECA72FFC9FEA985E16F993DA6" box="[321,508,1715,1736]" italics="true" pageId="5" pageNumber="258">Navicula volcanica</emphasis>
, SEM
</taxonomicName>
, North Umpqua River, Oregon. 11, 12. External valve views. 13
<emphasis id="FAD3C50ECA72FFC9FB5885E16AD93DA6" bold="true" box="[1200,1212,1715,1736]" pageId="5" pageNumber="258"></emphasis>
17. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm.
</paragraph>
</caption>
<paragraph id="C818191CCA72FFC9FF5584126DA83CAB" blockId="5.[136,1452,1856,1989]" pageId="5" pageNumber="258">
Internally, the raphe slit runs uninterrupted through an elevated central nodule (
<figureCitation id="509C0599CA72FFC9FBF284126A0F3C37" box="[1050,1130,1856,1881]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Fig. 16</figureCitation>
). The elevated rib subtending the raphe is positioned inside a longitudinal groove in the middle of the axial area and appears to be fused with the inflated part of the axial area on the primary side of the valve (
<figureCitation id="509C0599CA72FFC9FCAB84DA6DF03CCF" box="[835,917,1928,1953]" captionStart="FIGURES 1117" captionStartId="5.[136,243,1715,1736]" captionTargetBox="[189,1398,389,1687]" captionTargetId="figure-92@5.[189,1398,389,1690]" captionTargetPageId="5" captionText="FIGURES 1117. Navicula volcanica, SEM, North Umpqua River, Oregon. 11, 12. External valve views. 1317. Internal valve views. Scale bars: Figs 11, 13 = 10 μm; Figs 12, 14, 16 = 5 μm; Figs 15, 17 = 1 μm." figureDoi="http://doi.org/10.5281/zenodo.13635640" httpUri="https://zenodo.org/record/13635640/files/figure.png" pageId="5" pageNumber="258">Fig. 13</figureCitation>
), except in the middle part of the valve where it is positioned centrally. The axial area is slightly wider on the primary side.
</paragraph>
</subSubSection>
</treatment>
</document>