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<document id="6BEA1973EF8E6933A4689D71640530CE" ID-DOI="10.11646/phytotaxa.312.2.5" ID-ISSN="1179-3163" ID-Zenodo-Dep="13701405" 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="1725576663657" checkinUser="felipe" docAuthor="Liu, Qi, Wu, Weiwei, Wang, Jie, Feng, Jia, Lv, Junping, Kociolek, John Patrick &amp; Xie, Shulian" docDate="2017" docId="F62787B5FFA9FF8751C1B50DFC53FA8E" docLanguage="en" docName="phytotaxa.312.2.5.pdf" docOrigin="Phytotaxa 312 (2)" docSource="http://dx.doi.org/10.11646/phytotaxa.312.2.5" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.13:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="13" docTitle="Nitzschia shanxiensis Q. Liu &amp; S. L. Xie 2017, nom. nov., stat. nov." docType="treatment" docVersion="2" lastPageNumber="230" masterDocId="0A1EFFCDFFA8FF855149B659FFE8FFBF" masterDocTitle="Valve ultrastructure of Nitzschia shanxiensis nom. nov., stat. nov. and N. tabellaria (Bacillariales, Bacillariophyceae), with comments on their systematic position" masterLastPageNumber="236" masterPageNumber="228" pageNumber="229" updateTime="1725587298812" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title id="1505C7431992D045D07BEDA68F63D112">Valve ultrastructure of Nitzschia shanxiensis nom. nov., stat. nov. and N. tabellaria (Bacillariales, Bacillariophyceae), with comments on their systematic position</mods:title>
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<mods:namePart id="503DBC8A93011A79D54E2C5A3FC44CBB">Lv, Junping</mods:namePart>
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<mods:namePart id="B50B130D8E9AEF08C795D0971B7E597D">Kociolek, John Patrick</mods:namePart>
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<mods:date id="B90E198936F980CC96AAA973D485CB13">2017</mods:date>
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<heading id="257981CFFFA9FF8451C1B50DFCD4FCD0" box="[136,828,852,879]" fontSize="11" level="2" pageId="1" pageNumber="229" reason="3">
<taxonomicName id="B98E4D20FFA9FF8451C1B50DFDBBFCD0" authority="Q. Liu &amp; S. L. Xie" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[136,595,852,879]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="species" species="shanxiensis" status="nom. nov., stat. nov.">
<emphasis id="4CFAEAB1FFA9FF8451C1B50DFE69FCD0" bold="true" box="[136,385,852,879]" italics="true" pageId="1" pageNumber="229">Nitzschia shanxiensis</emphasis>
Q. Liu &amp; S.L. Xie
</taxonomicName>
<taxonomicNameLabel id="57C957CAFFA9FF845312B50FFCD4FCD0" box="[603,828,854,879]" pageId="1" pageNumber="229">nom. nov., stat. nov.</taxonomicNameLabel>
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<subSubSection id="36946528FFA9FF8451C1B523FE41FA6C" pageId="1" pageNumber="229" type="description">
<paragraph id="7E3136A3FFA9FF8451C1B523FEB6FC2C" blockId="1.[136,1452,890,985]" box="[136,350,890,915]" pageId="1" pageNumber="229">
(
<figureCitation id="E6B52A26FFA9FF8451D9B523FEEAFC2C" box="[144,258,890,915]" captionStart="FIGURES 124" captionStartId="2.[136,243,1979,2000]" captionTargetBox="[152,1430,1353,1947]" captionTargetId="figure-538@2.[151,1436,1350,1950]" captionTargetPageId="2" captionText="FIGURES 124. LM micrographs of Nitzschia shanxiensis and Nitzschia tabellaria. 112: Nitzschia shanxiensis. 1324: Nitzschia tabellaria. Scale bar: 10 μm." figureDoi="http://doi.org/10.5281/zenodo.13701407" httpUri="https://zenodo.org/record/13701407/files/figure.png" pageId="1" pageNumber="229">Figs 112</figureCitation>
,
<figureCitation id="E6B52A26FFA9FF845046B523FEBFFC2C" box="[271,343,890,915]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">2530</figureCitation>
)
</paragraph>
<paragraph id="7E3136A3FFA9FF8451C1B5F9FA93FC66" blockId="1.[136,1452,890,985]" pageId="1" pageNumber="229">
Basionym:
<taxonomicName id="B98E4D20FFA9FF8451BFB5F9FD0AFC0A" authority="Chen &amp; Zhu 1989" authorityName="Chen &amp; Zhu" authorityYear="1989" box="[246,738,928,949]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="variety" species="sinuata" variety="constricta">
<emphasis id="4CFAEAB1FFA9FF8451BFB5F9FE74FC0A" box="[246,412,928,949]" italics="true" pageId="1" pageNumber="229">Nitzschia sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFA9FF845082B5F9FDC3FC0A" box="[459,555,928,949]" italics="true" pageId="1" pageNumber="229">constricta</emphasis>
Chen &amp;
<bibRefCitation id="1A1F4B52FFA9FF8453CAB5F9FD0AFC0A" author="Zhu, H. Z. &amp; Chen, J. Y." box="[643,738,928,949]" pageId="1" pageNumber="229" pagination="33 - 37" refId="ref6309" refString="Zhu, H. Z. &amp; Chen, J. Y. (1989 a) New Species and Varieties of the Diatoms from Suoxiyu, Hunan, China. In: The algal flora and aquatic fauna of the Wulingyuan Nature Reserve Area, Hunan, China. Science Press, Beijing, pp. 33 - 37." type="book chapter" year="1989">Zhu 1989</bibRefCitation>
</taxonomicName>
. New Species and arieties of the Diatoms from Suoxiyu,
<collectingRegion id="BC4AF841FFA9FF84544EB5F9FAA1FC0A" box="[1287,1353,928,949]" country="China" name="Hunan" pageId="1" pageNumber="229">Hunan</collectingRegion>
,
<collectingCountry id="06997633FFA9FF84541AB5F9FA67FC0A" box="[1363,1423,928,949]" name="China" pageId="1" pageNumber="229">China</collectingCountry>
, in
<bibRefCitation id="1A1F4B52FFA9FF8451F4B59DFE60FC66" author="Zhu, H. Z. &amp; Chen, J. Y." box="[189,392,964,985]" pageId="1" pageNumber="229" pagination="33 - 37" refId="ref6309" refString="Zhu, H. Z. &amp; Chen, J. Y. (1989 a) New Species and Varieties of the Diatoms from Suoxiyu, Hunan, China. In: The algal flora and aquatic fauna of the Wulingyuan Nature Reserve Area, Hunan, China. Science Press, Beijing, pp. 33 - 37." type="book chapter" year="1989">Zhu &amp; Chen (1989a)</bibRefCitation>
, The algal flora and aquatic fauna of the Wulingyuan Nature Reserve Area,
<collectingRegion id="BC4AF841FFA9FF845528B59DFB4BFC66" box="[1121,1187,964,985]" country="China" name="Hunan" pageId="1" pageNumber="229">Hunan</collectingRegion>
,
<collectingCountry id="06997633FFA9FF8455E4B59DFB01FC66" box="[1197,1257,964,985]" name="China" pageId="1" pageNumber="229">China</collectingCountry>
, p. 36, fig. I: 8.
</paragraph>
<paragraph id="7E3136A3FFA9FF8451C1B253FEB9FBD4" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
The name was presented in the text by Chen and
<bibRefCitation id="1A1F4B52FFA9FF8453FFB253FCDEFB9C" author="Zhu, H. Z. &amp; Chen, J. Y." box="[694,822,1034,1059]" pageId="1" pageNumber="229" pagination="33 - 37" refId="ref6309" refString="Zhu, H. Z. &amp; Chen, J. Y. (1989 a) New Species and Varieties of the Diatoms from Suoxiyu, Hunan, China. In: The algal flora and aquatic fauna of the Wulingyuan Nature Reserve Area, Hunan, China. Science Press, Beijing, pp. 33 - 37." type="book chapter" year="1989">Zhu (1989)</bibRefCitation>
as “
<taxonomicName id="B98E4D20FFA9FF845220B253FB35FB9C" box="[873,1245,1034,1059]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="variety" species="sinuata" variety="constriata">
<emphasis id="4CFAEAB1FFA9FF845220B253FBC3FB9C" box="[873,1067,1034,1059]" italics="true" pageId="1" pageNumber="229">Nitzschia sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFA9FF84552FB253FB35FB9C" box="[1126,1245,1034,1059]" italics="true" pageId="1" pageNumber="229">constriata</emphasis>
</taxonomicName>
<emphasis id="4CFAEAB1FFA9FF845595B253FB0EFB9C" box="[1244,1254,1034,1059]" italics="true" pageId="1" pageNumber="229"></emphasis>
, but in the figure legend it was listed as
<taxonomicName id="B98E4D20FFA9FF8450DDB277FD50FBF8" box="[404,696,1070,1095]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="variety" species="sinuata" variety="constricta">
<emphasis id="4CFAEAB1FFA9FF8450DDB277FE4FFBF8" box="[404,423,1070,1095]" italics="true" pageId="1" pageNumber="229">N</emphasis>
.
<emphasis id="4CFAEAB1FFA9FF8450F1B277FDE2FBF8" box="[440,522,1070,1095]" italics="true" pageId="1" pageNumber="229">sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFA9FF845301B277FD50FBF8" box="[584,696,1070,1095]" italics="true" pageId="1" pageNumber="229">constricta</emphasis>
</taxonomicName>
. Based on the description, we consider the name in the text as a typographic error.
</paragraph>
<paragraph id="7E3136A3FFA9FF8451F4B22FFE02FB44" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
To be recognized as a separate species, this diatom requires a new name, since
<taxonomicName id="B98E4D20FFA9FF84550AB22FFACBFB30" box="[1091,1315,1142,1167]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="species" species="constricta">
<emphasis id="4CFAEAB1FFA9FF84550AB22FFACBFB30" box="[1091,1315,1142,1167]" italics="true" pageId="1" pageNumber="229">Nitzschia constricta</emphasis>
</taxonomicName>
is occupied with both
<taxonomicName id="B98E4D20FFA9FF8451BEB2C3FD61FB0C" authority="(Kutzing) Ralfs" authorityName="Ralfs" baseAuthorityName="Kutzing" box="[247,649,1178,1203]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="species" species="constricta">
<emphasis id="4CFAEAB1FFA9FF8451BEB2C3FE3DFB0C" box="[247,469,1178,1203]" italics="true" pageId="1" pageNumber="229">Nitzschia constricta</emphasis>
(Kützing) Ralfs
</taxonomicName>
in
<bibRefCitation id="1A1F4B52FFA9FF8453E3B2C3FC89FB0C" author="Pritchard, A." box="[682,865,1178,1203]" pageId="1" pageNumber="229" refId="ref5664" refString="Pritchard, A. (1861). A history of infusoria, living and fossil. Edition IV, Whittaker &amp; Co., London, 968 pp." type="book" year="1861">Pritchard (1861)</bibRefCitation>
(Basionym:
<taxonomicName id="B98E4D20FFA9FF8452A6B2C3FA4FFB0C" authority="(Kutzing 1844: 64))" baseAuthorityName="Kutzing" baseAuthorityPageNumber="64" baseAuthorityYear="1844" box="[1007,1447,1178,1203]" class="Bacillariophyceae" family="Fragilariaceae" genus="Synedra" higherTaxonomySource="GBIF" kingdom="Chromista" order="Fragilariales" pageId="1" pageNumber="229" phylum="Ochrophyta" rank="species" species="constricta">
<emphasis id="4CFAEAB1FFA9FF8452A6B2C3FB29FB0C" box="[1007,1217,1178,1203]" italics="true" pageId="1" pageNumber="229">Synedra constricta</emphasis>
(
<bibRefCitation id="1A1F4B52FFA9FF845587B2C3FA7CFB0C" author="Kutzing, F. T." box="[1230,1428,1178,1203]" pageId="1" pageNumber="229" pagination="1 - 30" refId="ref5293" refString="Kutzing, F. T. (1844) Die Kieselschaligen Bacillarien oder Diatomeen. Nordhausen: zu finden bei W. Kohne, pp. 1 - 152, pls 1 - 30. https: // doi. org / 10.5962 / bhl. title. 64360" type="book chapter" year="1844">Kützing 1844: 64</bibRefCitation>
))
</taxonomicName>
, and the later homonym
<taxonomicName id="B98E4D20FFA9FF8450D5B2E7FCB5FB68" authority="(Gregory) Grunow" authorityName="Grunow" baseAuthorityName="Gregory" box="[412,861,1214,1239]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="species" species="constricta">
<emphasis id="4CFAEAB1FFA9FF8450D5B2E7FD96FB68" box="[412,638,1214,1239]" italics="true" pageId="1" pageNumber="229">Nitzschia constricta</emphasis>
(Gregory) Grunow
</taxonomicName>
in
<bibRefCitation id="1A1F4B52FFA9FF8452CCB2E7FB65FB68" author="Cleve, P. T. &amp; Grunow, A." box="[901,1165,1214,1239]" pageId="1" pageNumber="229" refId="ref4239" refString="Cleve, P. T. &amp; Grunow, A. (1880) Beitrage zur Kenntniss der Arctischen Diatomeen. Kongliaga Svenska-Vetenskaps Akademiens Handlingar 17 (2): 121 pp., 7 pls." type="book" year="1880">Cleve &amp; Grunow 1880</bibRefCitation>
(Basionym:
<taxonomicName id="B98E4D20FFA9FF84546BB2E7FE0EFB44" authority="(Gregory 1855: 40))" baseAuthorityName="Gregory" baseAuthorityPageNumber="40" baseAuthorityYear="1855" class="Bacillariophyceae" family="Bacillariaceae" genus="Tryblionella" higherTaxonomySource="GBIF" kingdom="Chromista" order="Bacillariales" pageId="1" pageNumber="229" phylum="Ochrophyta" rank="species" species="constricta">
<emphasis id="4CFAEAB1FFA9FF84546BB2E7FF10FB44" italics="true" pageId="1" pageNumber="229">Tryblionella constricta</emphasis>
(
<bibRefCitation id="1A1F4B52FFA9FF84504EB2BBFE3AFB44" author="Gregory, W." box="[263,466,1250,1275]" pageId="1" pageNumber="229" pagination="38 - 41" refId="ref4421" refString="Gregory, W. (1855) On some new species of British freshwater Diatomaceae, with remarks on the value of certain specific characters. Proceedings of the Botanical Society of Edinburgh 1855: 38 - 41." type="book chapter" year="1855">Gregory 1855: 40</bibRefCitation>
))
</taxonomicName>
.
</paragraph>
<paragraph id="7E3136A3FFA9FF8451F4B35FFE41FA6C" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
Frustules solitary. Valves broadly lanceolate with constricted margins and protracted, round apices. Constriction slightly more pronounced on one side. Raphe eccentric, on a wide, low canal. Fibulae elongated and occupy about one-half the valve surface, somewhat irregularly distributed along the keel, numbering
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10 μm. Valve length 16.519.0 μm, breadth 5.06.0 μm (n=20). Uniseriate striae distinctly punctate, parallel around the center to nearly radiate towards the ends, often 34 striae between two fibulae,
<quantity id="B9769B46FFA9FF845223B3CFFC38FA10" box="[874,976,1430,1455]" metricMagnitude="-1" metricUnit="m" metricValue="5.715" metricValueMax="5.842" metricValueMin="5.588" pageId="1" pageNumber="229" unit="in" value="22.5" valueMax="23.0" valueMin="22.0">2223 in</quantity>
10 μm. Fibulate raphe system occurs on opposite sides of frustule.
</paragraph>
</subSubSection>
<subSubSection id="36946528FFA9FF8751F4B387FC53FA8E" lastPageId="2" lastPageNumber="230" pageId="1" pageNumber="229" type="distribution">
<paragraph id="7E3136A3FFA9FF8451F4B387FB29F9A4" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
<emphasis id="4CFAEAB1FFA9FF8451F4B387FDE1FA48" bold="true" box="[189,521,1502,1527]" pageId="1" pageNumber="229">Distribution and ecology:—</emphasis>
<collectingRegion id="BC4AF841FFA9FF845340B387FD2CFA48" box="[521,708,1502,1527]" country="China" name="Shanxi" pageId="1" pageNumber="229">Shanxi province</collectingRegion>
, Niangziguan spring basin,
<collectingCountry id="06997633FFA9FF8452B5B387FBAAFA48" box="[1020,1090,1502,1527]" name="China" pageId="1" pageNumber="229">China</collectingCountry>
, pH 8.2, temperature 17°C; also collected in Lake Pingyang, attached to a large stone. Zhangbu Geology Park,
<collectingRegion id="BC4AF841FFA9FF8452BEB05BFB29F9A4" box="[1015,1217,1538,1563]" country="China" name="Guizhou" pageId="1" pageNumber="229">Guizhou province</collectingRegion>
</paragraph>
<paragraph id="7E3136A3FFA9FF8451F4B07FFA68F914" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
<emphasis id="4CFAEAB1FFA9FF8451F4B07FFE69F980" bold="true" box="[189,385,1574,1599]" pageId="1" pageNumber="229">Observations:—</emphasis>
In SEM, valves are broad, with a distinct constricted center and tapering narrowly to rounded apices (
<figureCitation id="E6B52A26FFA9FF845194B013FED9F9DC" box="[221,305,1610,1635]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Fig. 25</figureCitation>
). Externally, striae are composed of individual, circular to elongate areolae with small occlusions (
<figureCitation id="E6B52A26FFA9FF845437B013FF40F938" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Fig. 26</figureCitation>
). The keel is a simple ridge extending marginally from apex to apex (
<figureCitation id="E6B52A26FFA9FF84528CB037FBF3F938" box="[965,1051,1646,1671]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Fig. 25</figureCitation>
). The raphe is filiform and without proximal raphe ends (
<figureCitation id="E6B52A26FFA9FF845035B0CBFE16F914" box="[380,510,1682,1707]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Figs 25, 26</figureCitation>
). The distal raphe ends hooked towards the same side of the valve (
<figureCitation id="E6B52A26FFA9FF8455B8B0CBFA9BF914" box="[1265,1395,1682,1707]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Figs 25, 27</figureCitation>
).
</paragraph>
<paragraph id="7E3136A3FFA9FF8451F4B0EFFDC5F8E0" blockId="1.[136,1452,1034,2067]" pageId="1" pageNumber="229">
Internally, the areolae are rounded to elongate pores (
<figureCitation id="E6B52A26FFA9FF84525BB0EFFC8EF970" box="[786,870,1718,1743]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Fig. 28</figureCitation>
). The canal raphe is subtended by fibulae extending about one-half the valve surface (
<figureCitation id="E6B52A26FFA9FF845348B083FD6DF94C" box="[513,645,1754,1779]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Figs 28, 29</figureCitation>
). Narrow fibulae connect to the valve face internally with a wider base, sometimes with two or three smaller sections. Fibulae also attached to the base of the valve mantle. The canal raphe has a series of elliptical portulae (
<figureCitation id="E6B52A26FFA9FF8450B6B17BFD69F884" box="[511,641,1826,1851]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Figs 29, 30</figureCitation>
). The distal raphe ends terminate as helictoglossae and are positioned on the mantle at the apices (
<figureCitation id="E6B52A26FFA9FF8450D7B11FFDC9F8E0" box="[414,545,1862,1887]" captionStart="FIGURES 2530" captionStartId="3.[136,243,1657,1678]" captionTargetBox="[151,1436,190,1632]" captionTargetId="figure-20@3.[151,1436,190,1632]" captionTargetPageId="3" captionText="FIGURES 2530. SEM micrographs of Nitzschia shanxiensis. 25. External view of the valve, showing the keel extending marginally from apex to apex. 26. Central area showing the raphe is without central raphe ending, areolae are circular to elongate. 27. Valve terminus showing the hooked raphe ends. 28. Internal view of the valve, showing the canal raphe subtended by fibulae. 29. Internal view of valve center showing the fibulae structures. 30. Distal raphe ends showing helictoglossae and are positioned on the mantle at the apices." figureDoi="http://doi.org/10.5281/zenodo.13701409" httpUri="https://zenodo.org/record/13701409/files/figure.png" pageId="1" pageNumber="229">Figs 28, 30</figureCitation>
).
</paragraph>
<paragraph id="7E3136A3FFA9FF8751F4B133FAA7FE2E" blockId="1.[136,1452,1034,2067]" lastBlockId="2.[136,1452,160,401]" lastPageId="2" lastPageNumber="230" pageId="1" pageNumber="229">
Discussion related to
<taxonomicName id="B98E4D20FFA9FF8450FDB133FD4EF83C" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[436,678,1898,1923]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="species" species="shanxiensis">
<emphasis id="4CFAEAB1FFA9FF8450FDB133FD4EF83C" box="[436,678,1898,1923]" italics="true" pageId="1" pageNumber="229">Nitzschia shanxiensis</emphasis>
</taxonomicName>
: There are several species to which this taxon should be compared. These species, considered by
<bibRefCitation id="1A1F4B52FFA9FF84509BB1D7FD25F818" author="Lange-Bertalot, H." box="[466,717,1934,1959]" pageId="1" pageNumber="229" pagination="41 - 77" refId="ref5342" refString="Lange-Bertalot, H. (1980) New species, combinations and synonyms in the genus Nitzschia. Bacillaria 3: 41 - 77." type="journal article" year="1980">Lange-Bertalot (1980)</bibRefCitation>
to be conspecific, are in our opinion divided into two groups. The first group includes several fossils described from
<collectingCountry id="06997633FFA9FF845389B1EBFCE7F874" box="[704,783,1970,1995]" name="France" pageId="1" pageNumber="229">France</collectingCountry>
, such as
<taxonomicName id="B98E4D20FFA9FF84523DB1EBFA87F874" authority="(Heribaud 1903: 33)" baseAuthorityName="Heribaud" baseAuthorityPageNumber="33" baseAuthorityYear="1903" box="[884,1391,1970,1995]" class="Bacillariophyceae" family="Bacillariaceae" genus="Grunowia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Bacillariales" pageId="1" pageNumber="229" phylum="Ochrophyta" rank="species" species="moissacensis">
<emphasis id="4CFAEAB1FFA9FF84523DB1EBFB97F874" box="[884,1151,1970,1995]" italics="true" pageId="1" pageNumber="229">Grunowia moissacensis</emphasis>
(
<bibRefCitation id="1A1F4B52FFA9FF8455C7B1EBFA8DF874" author="Heribaud, J." box="[1166,1381,1970,1995]" pageId="1" pageNumber="229" pagination="9 - 12" refId="ref4614" refString="Heribaud, J. (1903) Les Diatomees Fossiles d'Auvergne (Second Memoire). Paris: Librairie des Sciences Naturelles, pp. v - x, 1 - 166, pls. 9 - 12." type="book chapter" year="1903">Heribaud 1903: 33</bibRefCitation>
)
</taxonomicName>
. This diatom is, comparatively large (40 μm in length, 6 μm wide) and has 5.56.0 fibulae in 10 μm (
<tableCitation id="330C0318FFA9FF8455F5B18FFAF8F850" box="[1212,1296,2006,2031]" captionStart="TABLE 1" captionStartId="2.[136,224,449,472]" captionText="TABLE 1. Comparison between Nitzschia shanxiensis and similar species." pageId="1" pageNumber="229">Table 1</tableCitation>
). Striae of
<taxonomicName id="B98E4D20FFA9FF8454D9B18FFEF2F7AC" baseAuthorityName="Heribaud" baseAuthorityYear="1903" class="Bacillariophyceae" family="Bacillariaceae" genus="Grunowia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Bacillariales" pageId="1" pageNumber="229" phylum="Ochrophyta" rank="species" species="moissacensis">
<emphasis id="4CFAEAB1FFA9FF8454D9B18FFEF2F7AC" italics="true" pageId="1" pageNumber="229">G. moissacensis</emphasis>
</taxonomicName>
number
<quantity id="B9769B46FFA9FF845034B1A3FE5DF7AC" box="[381,437,2042,2067]" metricMagnitude="-1" metricUnit="m" metricValue="5.08" pageId="1" pageNumber="229" unit="in" value="20.0">20 in</quantity>
10 μm and the valve tapers gently to the apices.
<taxonomicName id="B98E4D20FFA9FF84529AB1A3FAD7F7AC" authorityName="Grunow" authorityYear="1881" box="[979,1343,2042,2067]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="1" pageNumber="229" phylum="Arthropoda" rank="variety" species="denticula" variety="delognei">
<emphasis id="4CFAEAB1FFA9FF84529AB1A3FB41F7AC" box="[979,1193,2042,2067]" italics="true" pageId="1" pageNumber="229">Nitzschia denticula</emphasis>
var.
<emphasis id="4CFAEAB1FFA9FF845596B1A3FAD7F7AC" box="[1247,1343,2042,2067]" italics="true" pageId="1" pageNumber="229">delognei</emphasis>
</taxonomicName>
(Grunow in Van Heurck 1881: 176; =
<taxonomicName id="B98E4D20FFAAFF875085B6F9FD35FF06" box="[460,733,160,185]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="sinuata" variety="delognei">
<emphasis id="4CFAEAB1FFAAFF875085B6F9FDA9FF06" box="[460,577,160,185]" italics="true" pageId="2" pageNumber="230">N. sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF875334B6F9FD35FF06" box="[637,733,160,185]" italics="true" pageId="2" pageNumber="230">delognei</emphasis>
</taxonomicName>
(Grunow in Van Heurck) Lange-Bertalot), described as extant from the Botanical Garden in
<collectingRegion id="BC4AF841FFAAFF8750ABB69DFDACFF62" box="[482,580,196,221]" country="Belgium" name="Region de Bruxelles-Capitale" pageId="2" pageNumber="230">Brussels</collectingRegion>
,
<collectingCountry id="06997633FFAAFF875318B69DFD5CFF62" box="[593,692,196,221]" name="Belgium" pageId="2" pageNumber="230">Belgium</collectingCountry>
, is much smaller (1020 μm long, 34 μm wide) and more finely ornamented, with 68 fibulae per 10 μm and 2226 striae per 10 μm (
<bibRefCitation id="1A1F4B52FFAAFF8752DBB6B1FB68FEBE" author="Lange-Bertalot, H." box="[914,1152,232,257]" pageId="2" pageNumber="230" pagination="41 - 77" refId="ref5342" refString="Lange-Bertalot, H. (1980) New species, combinations and synonyms in the genus Nitzschia. Bacillaria 3: 41 - 77." type="journal article" year="1980">Lange-Bertalot 1980</bibRefCitation>
; see figs 83, 84).
<taxonomicName id="B98E4D20FFAAFF87540AB6B1FD60FE9A" authority="(Biswas 1964: 511)" baseAuthorityName="Biswas" baseAuthorityPageNumber="511" baseAuthorityYear="1964" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="sinuata" variety="denticuloides">
<emphasis id="4CFAEAB1FFAAFF87540AB6B1FF32FE9A" italics="true" pageId="2" pageNumber="230">Nitzschia sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF875058B755FE4EFE9A" box="[273,422,268,293]" italics="true" pageId="2" pageNumber="230">denticuloides</emphasis>
(Biswas 1964: 511)
</taxonomicName>
may also belong to this group. Its morphometry in terms of size (length 1022 μm, breadth 34 μm) and density of ornamentation (fibulae
<quantity id="B9769B46FFAAFF8752C1B769FC38FEF6" box="[904,976,304,329]" metricMagnitude="-1" metricUnit="m" metricValue="1.778" metricValueMax="2.032" metricValueMin="1.524" pageId="2" pageNumber="230" unit="in" value="7.0" valueMax="8.0" valueMin="6.0">68 in</quantity>
10 μm; striae
<quantity id="B9769B46FFAAFF875530B769FB35FEF6" box="[1145,1245,304,329]" metricMagnitude="-1" metricUnit="m" metricValue="6.858" metricValueMax="8.128" metricValueMin="5.588" pageId="2" pageNumber="230" unit="in" value="27.0" valueMax="32.0" valueMin="22.0">2232 in</quantity>
10 μm) suggest a close relationship with Grunows taxon.
<taxonomicName id="B98E4D20FFAAFF875319B70DFC78FED2" baseAuthorityName="Biswas" baseAuthorityYear="1964" box="[592,912,340,365]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="sinuata" variety="denticuloides">
<emphasis id="4CFAEAB1FFAAFF875319B70DFD2BFED2" box="[592,707,340,365]" italics="true" pageId="2" pageNumber="230">N. sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF8753B2B70DFC78FED2" box="[763,912,340,365]" italics="true" pageId="2" pageNumber="230">denticuloides</emphasis>
</taxonomicName>
was described from northern
<collectingCountry id="06997633FFAAFF8755A8B70DFAC0FED2" box="[1249,1320,340,365]" name="United Kingdom" pageId="2" pageNumber="230">Wales</collectingCountry>
. These taxa are more lanceolate in shape, and lack the undulate margins of
<taxonomicName id="B98E4D20FFAAFF875200B721FC54FE2E" box="[841,956,376,401]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="sinuata">
<emphasis id="4CFAEAB1FFAAFF875200B721FCB4FE2E" box="[841,860,376,401]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF875223B721FC54FE2E" box="[874,956,376,401]" italics="true" pageId="2" pageNumber="230">sinuata</emphasis>
</taxonomicName>
and inflated center of
<taxonomicName id="B98E4D20FFAAFF8755F0B721FAA0FE2E" box="[1209,1352,376,401]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="tabellaria">
<emphasis id="4CFAEAB1FFAAFF8755F0B721FB24FE2E" box="[1209,1228,376,401]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF875593B721FAA0FE2E" box="[1242,1352,376,401]" italics="true" pageId="2" pageNumber="230">tabellaria</emphasis>
</taxonomicName>
.
</paragraph>
<caption id="2AF1662BFFAAFF8751C1B798FC59FE67" box="[136,945,448,472]" pageId="2" pageNumber="230" startId="2.[136,224,449,472]" targetType="table">
<paragraph id="7E3136A3FFAAFF8751C1B798FC59FE67" blockId="2.[136,945,448,472]" box="[136,945,448,472]" pageId="2" pageNumber="230">
<emphasis id="4CFAEAB1FFAAFF8751C1B798FF13FE67" bold="true" box="[136,251,449,472]" pageId="2" pageNumber="230">TABLE 1.</emphasis>
Comparison between
<taxonomicName id="B98E4D20FFAAFF8750A3B799FD30FE67" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[490,728,448,472]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="shanxiensis">
<emphasis id="4CFAEAB1FFAAFF8750A3B799FD30FE67" bold="true" box="[490,728,448,472]" italics="true" pageId="2" pageNumber="230">Nitzschia shanxiensis</emphasis>
</taxonomicName>
and similar species.
</paragraph>
</caption>
<paragraph id="7E3136A3FFAAFF87502AB7BFFA77FD4D" pageId="2" pageNumber="230">
<table id="0C8EC403FFAA007A51D9B7BFFA77FD4D" box="[144,1439,486,754]" gridcols="7" gridrows="6" pageId="2" pageNumber="230">
<tr id="C0BE34E1FFAA007A51D9B7BFFA77FDA7" box="[144,1439,486,536]" gridrow="0" pageId="2" pageNumber="230" rowspan-0="1">
<th id="836F5D9DFFAA007A502AB7BFFE06FDA7" box="[355,494,486,536]" gridcol="1" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF87502AB7BFFE06FE44" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[355,494,486,507]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="shanxiensis">
<emphasis id="4CFAEAB1FFAAFF87502AB7BFFE06FE44" box="[355,494,486,507]" italics="true" pageId="2" pageNumber="230">N. shanxiensis</emphasis>
</taxonomicName>
</th>
<th id="836F5D9DFFAA007A5352B7BFFD52FDA7" box="[539,698,486,536]" gridcol="2" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF875352B7BFFD5DFE44" baseAuthorityName="Heribaud" baseAuthorityYear="1903" box="[539,693,486,507]" class="Bacillariophyceae" family="Bacillariaceae" genus="Grunowia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Bacillariales" pageId="2" pageNumber="230" phylum="Ochrophyta" rank="species" species="moissacensis">
<emphasis id="4CFAEAB1FFAAFF875352B7BFFD5DFE44" box="[539,693,486,507]" italics="true" pageId="2" pageNumber="230">G. moissacensis</emphasis>
</taxonomicName>
</th>
<th id="836F5D9DFFAA007A5390B7BFFC79FDA7" box="[729,913,486,536]" gridcol="3" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF875390B7BFFCC4FDA7" authorityName="Grunow" authorityYear="1881" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="denticula" variety="delognei">
<emphasis id="4CFAEAB1FFAAFF875390B7BFFCA6FE44" box="[729,846,486,507]" italics="true" pageId="2" pageNumber="230">N. denticula</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF875390B45AFCC4FDA7" box="[729,812,515,536]" italics="true" pageId="2" pageNumber="230">delognei</emphasis>
</taxonomicName>
</th>
<th id="836F5D9DFFAA007A52F9B7BFFBD5FDA7" box="[944,1085,486,536]" gridcol="4" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF8752F9B7BFFBD8FDA7" baseAuthorityName="Biswas" baseAuthorityYear="1964" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="sinuata" variety="denticuloides">
<emphasis id="4CFAEAB1FFAAFF8752F9B7BFFBFBFE44" box="[944,1043,486,507]" italics="true" pageId="2" pageNumber="230">N. sinuata</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF8752F9B45AFBD8FDA7" box="[944,1072,515,536]" italics="true" pageId="2" pageNumber="230">denticuloides</emphasis>
</taxonomicName>
</th>
<th id="836F5D9DFFAA007A552AB7BFFB1AFDA7" box="[1123,1266,486,536]" gridcol="5" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF87552AB7BFFB24FE44" box="[1123,1228,486,507]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="heidenii">
<emphasis id="4CFAEAB1FFAAFF87552AB7BFFB24FE44" box="[1123,1228,486,507]" italics="true" pageId="2" pageNumber="230">N. heidenii</emphasis>
</taxonomicName>
</th>
<th id="836F5D9DFFAA007A544FB7BFFA77FDA7" box="[1286,1439,486,536]" gridcol="6" gridrow="0" pageId="2" pageNumber="230">
<taxonomicName id="B98E4D20FFAAFF87544FB7BFFA86FDA7" baseAuthorityName="Peterson" baseAuthorityYear="1939" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="pamirensis">
<emphasis id="4CFAEAB1FFAAFF87544FB7BFFAFEFE44" box="[1286,1302,486,507]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87546BB7BFFA87FE44" box="[1314,1391,486,507]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF87544FB45AFA86FDA7" box="[1286,1390,515,536]" italics="true" pageId="2" pageNumber="230">pamirensis</emphasis>
</taxonomicName>
</th>
</tr>
<tr id="C0BE34E1FFAA007A51D9B47AFA77FD87" box="[144,1439,547,568]" gridrow="1" pageId="2" pageNumber="230">
<th id="836F5D9DFFAA007A51D9B47AFEA3FD87" box="[144,331,547,568]" gridcol="0" gridrow="1" pageId="2" pageNumber="230">Valve length (μm)</th>
<td id="836F5D9DFFAA007A502AB47AFE06FD87" box="[355,494,547,568]" gridcol="1" gridrow="1" pageId="2" pageNumber="230">16.519.0</td>
<td id="836F5D9DFFAA007A5352B47AFD52FD87" box="[539,698,547,568]" gridcol="2" gridrow="1" pageId="2" pageNumber="230">40</td>
<td id="836F5D9DFFAA007A5390B47AFC79FD87" box="[729,913,547,568]" gridcol="3" gridrow="1" pageId="2" pageNumber="230">1020</td>
<td id="836F5D9DFFAA007A52F9B47AFBD5FD87" box="[944,1085,547,568]" gridcol="4" gridrow="1" pageId="2" pageNumber="230">1022</td>
<td id="836F5D9DFFAA007A552AB47AFB1AFD87" box="[1123,1266,547,568]" gridcol="5" gridrow="1" pageId="2" pageNumber="230">2840</td>
<td id="836F5D9DFFAA007A544FB47AFA77FD87" box="[1286,1439,547,568]" gridcol="6" gridrow="1" pageId="2" pageNumber="230">3.54.2</td>
</tr>
<tr id="C0BE34E1FFAA007A51D9B41AFA77FDE7" box="[144,1439,579,600]" gridrow="2" pageId="2" pageNumber="230">
<th id="836F5D9DFFAA007A51D9B41AFEA3FDE7" box="[144,331,579,600]" gridcol="0" gridrow="2" pageId="2" pageNumber="230">Valve width (μm)</th>
<td id="836F5D9DFFAA007A502AB41AFE06FDE7" box="[355,494,579,600]" gridcol="1" gridrow="2" pageId="2" pageNumber="230">5.06.0</td>
<td id="836F5D9DFFAA007A5352B41AFD52FDE7" box="[539,698,579,600]" gridcol="2" gridrow="2" pageId="2" pageNumber="230">6</td>
<td id="836F5D9DFFAA007A5390B41AFC79FDE7" box="[729,913,579,600]" gridcol="3" gridrow="2" pageId="2" pageNumber="230">34</td>
<td id="836F5D9DFFAA007A52F9B41AFBD5FDE7" box="[944,1085,579,600]" gridcol="4" gridrow="2" pageId="2" pageNumber="230">34</td>
<td id="836F5D9DFFAA007A552AB41AFB1AFDE7" box="[1123,1266,579,600]" gridcol="5" gridrow="2" pageId="2" pageNumber="230">78</td>
<td id="836F5D9DFFAA007A544FB41AFA77FDE7" box="[1286,1439,579,600]" gridcol="6" gridrow="2" pageId="2" pageNumber="230">56</td>
</tr>
<tr id="C0BE34E1FFAA007A51D9B43AFA77FD2A" box="[144,1439,611,661]" gridrow="3" pageId="2" pageNumber="230">
<th id="836F5D9DFFAA007A51D9B43AFEA3FD2A" box="[144,331,611,661]" gridcol="0" gridrow="3" pageId="2" pageNumber="230">Number of fibulae in 10 μm</th>
<td id="836F5D9DFFAA007A502AB43AFE06FD2A" box="[355,494,611,661]" gridcol="1" gridrow="3" pageId="2" pageNumber="230">57</td>
<td id="836F5D9DFFAA007A5352B43AFD52FD2A" box="[539,698,611,661]" gridcol="2" gridrow="3" pageId="2" pageNumber="230">5.56.0</td>
<td id="836F5D9DFFAA007A5390B43AFC79FD2A" box="[729,913,611,661]" gridcol="3" gridrow="3" pageId="2" pageNumber="230">68</td>
<td id="836F5D9DFFAA007A52F9B43AFBD5FD2A" box="[944,1085,611,661]" gridcol="4" gridrow="3" pageId="2" pageNumber="230">68</td>
<td id="836F5D9DFFAA007A552AB43AFB1AFD2A" box="[1123,1266,611,661]" gridcol="5" gridrow="3" pageId="2" pageNumber="230">56</td>
<td id="836F5D9DFFAA007A544FB43AFA77FD2A" box="[1286,1439,611,661]" gridcol="6" gridrow="3" pageId="2" pageNumber="230">6.06.5</td>
</tr>
<tr id="C0BE34E1FFAA007A51D9B4F9FA77FD6D" box="[144,1439,672,722]" gridrow="4" pageId="2" pageNumber="230">
<th id="836F5D9DFFAA007A51D9B4F9FEA3FD6D" box="[144,331,672,722]" gridcol="0" gridrow="4" pageId="2" pageNumber="230">Number of striae in 10 μm</th>
<td id="836F5D9DFFAA007A502AB4F9FE06FD6D" box="[355,494,672,722]" gridcol="1" gridrow="4" pageId="2" pageNumber="230">2223</td>
<td id="836F5D9DFFAA007A5352B4F9FD52FD6D" box="[539,698,672,722]" gridcol="2" gridrow="4" pageId="2" pageNumber="230">20</td>
<td id="836F5D9DFFAA007A5390B4F9FC79FD6D" box="[729,913,672,722]" gridcol="3" gridrow="4" pageId="2" pageNumber="230">2226</td>
<td id="836F5D9DFFAA007A52F9B4F9FBD5FD6D" box="[944,1085,672,722]" gridcol="4" gridrow="4" pageId="2" pageNumber="230">2232</td>
<td id="836F5D9DFFAA007A552AB4F9FB1AFD6D" box="[1123,1266,672,722]" gridcol="5" gridrow="4" pageId="2" pageNumber="230">1820</td>
<td id="836F5D9DFFAA007A544FB4F9FA77FD6D" box="[1286,1439,672,722]" gridcol="6" gridrow="4" pageId="2" pageNumber="230">27</td>
</tr>
<tr id="C0BE34E1FFAA007A51D9B484FA77FD4D" box="[144,1439,733,754]" gridrow="5" pageId="2" pageNumber="230">
<th id="836F5D9DFFAA007A51D9B484FEA3FD4D" box="[144,331,733,754]" gridcol="0" gridrow="5" pageId="2" pageNumber="230">References</th>
<td id="836F5D9DFFAA007A502AB484FE06FD4D" box="[355,494,733,754]" gridcol="1" gridrow="5" pageId="2" pageNumber="230">this study</td>
<td id="836F5D9DFFAA007A5352B484FD52FD4D" box="[539,698,733,754]" gridcol="2" gridrow="5" pageId="2" pageNumber="230">
<bibRefCitation id="1A1F4B52FFAAFF875352B484FD52FD4D" author="Heribaud, J." box="[539,698,733,754]" pageId="2" pageNumber="230" pagination="9 - 12" refId="ref4614" refString="Heribaud, J. (1903) Les Diatomees Fossiles d'Auvergne (Second Memoire). Paris: Librairie des Sciences Naturelles, pp. v - x, 1 - 166, pls. 9 - 12." type="book chapter" year="1903">Heribaud (1903)</bibRefCitation>
</td>
<td id="836F5D9DFFAA007A5390B484FC79FD4D" box="[729,913,733,754]" gridcol="3" gridrow="5" pageId="2" pageNumber="230">Van Heurck (1881)</td>
<td id="836F5D9DFFAA007A52F9B484FBD5FD4D" box="[944,1085,733,754]" gridcol="4" gridrow="5" pageId="2" pageNumber="230">Biswas (1964)</td>
<td id="836F5D9DFFAA007A552AB484FB1AFD4D" box="[1123,1266,733,754]" gridcol="5" gridrow="5" pageId="2" pageNumber="230">
<bibRefCitation id="1A1F4B52FFAAFF87552AB484FB1AFD4D" author="Meister, F." box="[1123,1266,733,754]" pageId="2" pageNumber="230" pagination="226 - 231" refId="ref5534" refString="Meister, F. (1914) Beitrage zur Bacillariaceenflora Japans. II. Archiv fur Hydrobiologie und Planktonkunde 9: 226 - 231." type="journal article" year="1914">Meister (1914)</bibRefCitation>
</td>
<td id="836F5D9DFFAA007A544FB484FA77FD4D" box="[1286,1439,733,754]" gridcol="6" gridrow="5" pageId="2" pageNumber="230">
<bibRefCitation id="1A1F4B52FFAAFF87544FB484FA77FD4D" author="Peterson, J. B." box="[1286,1439,733,754]" pageId="2" pageNumber="230" pagination="1 - 59" refId="ref5633" refString="Peterson, J. B. (1930) Algae from O. Olufsen's Second Danish Pamir Expedition 1898 - 99. Dansk Botnisk Archiv 6: 1 - 59." type="journal article" year="1930">Peterson (1930)</bibRefCitation>
</td>
</tr>
</table>
</paragraph>
<paragraph id="7E3136A3FFAAFF8751F4B579FE01FB56" blockId="2.[136,1452,800,1329]" pageId="2" pageNumber="230">
A second section of this first group of species was described as extant from Asia. These include
<taxonomicName id="B98E4D20FFAAFF875464B579FEB8FCE2" authority="(Meister) Hustedt" authorityName="Hustedt" baseAuthorityName="Meister" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="heidenii">
<emphasis id="4CFAEAB1FFAAFF875464B579FA43FC86" box="[1325,1451,800,825]" italics="true" pageId="2" pageNumber="230">N. heidenii</emphasis>
(Meister) Hustedt
</taxonomicName>
, first described from
<collectingCountry id="06997633FFAAFF875373B51DFD92FCE2" box="[570,634,836,861]" name="Japan" pageId="2" pageNumber="230">Japan</collectingCountry>
(
<bibRefCitation id="1A1F4B52FFAAFF8753CFB51DFCBDFCE2" author="Meister, F." box="[646,853,836,861]" pageId="2" pageNumber="230" pagination="226 - 231" refId="ref5534" refString="Meister, F. (1914) Beitrage zur Bacillariaceenflora Japans. II. Archiv fur Hydrobiologie und Planktonkunde 9: 226 - 231." type="journal article" year="1914">Meister 1914: 229</bibRefCitation>
) and later reported by Hustedt (in
<bibRefCitation id="1A1F4B52FFAAFF875587B51DFA84FCE2" author="Schmidt, A." box="[1230,1388,836,861]" pageId="2" pageNumber="230" pagination="349 - 352" refId="ref5969" refString="Schmidt, A. (1924) Atlas der Diatomaceen-kunde. Leipzig. O. R. Reisland Series VIII, Heft 88, pls. 349 - 352." type="journal article" year="1924">Schmidt 1924</bibRefCitation>
, plate 351, figs 9-13) from that country. This diatom was originally described by Meister as being relatively large (2840 μm long, 78 μm wide) and more coarsely ornamented with 56 fibulae in 10 μm and 1820 striae in 10 μm. Lange- Bertalots illustrations (1980, figs 77, 78) show large valves tapering gently to small capitate apices. Varieties of this species were described from elsewhere in Asia, including
<taxonomicName id="B98E4D20FFAAFF875258B58DFA43FC52" authority="(Skvortzow &amp; Meyer 1928: 39)" baseAuthorityName="Skvortzow &amp; Meyer" baseAuthorityPageNumber="39" baseAuthorityYear="1928" box="[785,1451,980,1005]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="baicalensis">
<emphasis id="4CFAEAB1FFAAFF875258B58DFCCCFC52" box="[785,804,980,1005]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87527BB58DFC64FC52" box="[818,908,980,1005]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF87528DB58DFBAAFC52" box="[964,1090,980,1005]" italics="true" pageId="2" pageNumber="230">baicalensis</emphasis>
(
<bibRefCitation id="1A1F4B52FFAAFF875519B58DFA4BFC52" author="Skvortzow, B. W. &amp; Meyer, C. I." box="[1104,1443,980,1005]" pageId="2" pageNumber="230" pagination="1 - 55" refId="ref6140" refString="Skvortzow, B. W. &amp; Meyer, C. I. (1928) A contribution to the Diatoms of Baikal Lake. Proceedings of the Sungaree River Biological Station 1 (5): 1 - 55, 3 pls." type="journal article" year="1928">Skvortzow &amp; Meyer 1928: 39</bibRefCitation>
)
</taxonomicName>
from Lake Baikal and
<taxonomicName id="B98E4D20FFAAFF8750CFB5A1FC45FBAE" authority="(Kobayashi 1960: 76)" baseAuthorityName="Kobayashi" baseAuthorityPageNumber="76" baseAuthorityYear="1960" box="[390,941,1016,1041]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="lanceolata">
<emphasis id="4CFAEAB1FFAAFF8750CFB5A1FE71FBAE" box="[390,409,1016,1041]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF8750EEB5A1FDE9FBAE" box="[423,513,1016,1041]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF875373B5A1FD58FBAE" box="[570,688,1016,1041]" italics="true" pageId="2" pageNumber="230">lanceolata</emphasis>
(Kobayashi 1960: 76)
</taxonomicName>
and
<taxonomicName id="B98E4D20FFAAFF8752ACB5A1FF45FB8A" authority="(Kobayashi 1960: 76)" baseAuthorityName="Kobayashi" baseAuthorityPageNumber="76" baseAuthorityYear="1960" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="minor">
<emphasis id="4CFAEAB1FFAAFF8752ACB5A1FC10FBAE" box="[997,1016,1016,1041]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87554FB5A1FB88FBAE" box="[1030,1120,1016,1041]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF8755D1B5A1FB33FBAE" box="[1176,1243,1016,1041]" italics="true" pageId="2" pageNumber="230">minor</emphasis>
(Kobayashi 1960: 76)
</taxonomicName>
from
<collectingCountry id="06997633FFAAFF8751BAB245FEDEFB8A" box="[243,310,1052,1077]" name="Japan" pageId="2" pageNumber="230">Japan</collectingCountry>
. Peterson described
<taxonomicName id="B98E4D20FFAAFF875355B245FBC6FB8A" authority="(Peterson 1939: 52)" baseAuthorityName="Peterson" baseAuthorityPageNumber="52" baseAuthorityYear="1939" box="[540,1070,1052,1077]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="pamirensis">
<emphasis id="4CFAEAB1FFAAFF875355B245FDC7FB8A" box="[540,559,1052,1077]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF875374B245FD7FFB8A" box="[573,663,1052,1077]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF875386B245FCA1FB8A" box="[719,841,1052,1077]" italics="true" pageId="2" pageNumber="230">pamirensis</emphasis>
(Peterson 1939: 52)
</taxonomicName>
from Central Asia, and this taxon was reported by
<bibRefCitation id="1A1F4B52FFAAFF875075B219FE3AFBE6" author="Foged, N." box="[316,466,1088,1113]" pageId="2" pageNumber="230" pagination="1 - 95" refId="ref4315" refString="Foged, N. (1959) Diatoms from Afghanistan. Det Kongelige Danske Videnskabernes Selskab, Biologiske Shrifter 11: 1 - 95." type="journal article" year="1959">Foged (1959)</bibRefCitation>
from
<collectingCountry id="06997633FFAAFF875358B219FD76FBE6" box="[529,670,1088,1113]" name="Afghanistan" pageId="2" pageNumber="230">Afghanistan</collectingCountry>
.While Petersons taxon has protracted apices similar to
<taxonomicName id="B98E4D20FFAAFF87544DB219FA4CFBE6" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[1284,1444,1088,1113]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="shanxiensis">
<emphasis id="4CFAEAB1FFAAFF87544DB219FA4CFBE6" box="[1284,1444,1088,1113]" italics="true" pageId="2" pageNumber="230">N. shanxiensis</emphasis>
</taxonomicName>
, it is much more narrow (3.54.2 μm for
<taxonomicName id="B98E4D20FFAAFF875305B23DFC90FBC2" baseAuthorityName="Peterson" baseAuthorityYear="1939" box="[588,888,1124,1149]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="variety" species="heidenii" variety="pamirensis">
<emphasis id="4CFAEAB1FFAAFF875305B23DFDB7FBC2" box="[588,607,1124,1149]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF875324B23DFD2FFBC2" box="[621,711,1124,1149]" italics="true" pageId="2" pageNumber="230">heidenii</emphasis>
var.
<emphasis id="4CFAEAB1FFAAFF8753B7B23DFC90FBC2" box="[766,888,1124,1149]" italics="true" pageId="2" pageNumber="230">pamirensis</emphasis>
</taxonomicName>
versus 56 μm wide in
<taxonomicName id="B98E4D20FFAAFF8755CCB23DFACEFBC2" authorityName="Q. Liu &amp; S. L. Xie" authorityYear="2017" box="[1157,1318,1124,1149]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="shanxiensis">
<emphasis id="4CFAEAB1FFAAFF8755CCB23DFB70FBC2" box="[1157,1176,1124,1149]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF8755ECB23DFACEFBC2" box="[1189,1318,1124,1149]" italics="true" pageId="2" pageNumber="230">shanxiensis</emphasis>
</taxonomicName>
), with finer fibulae (6.0
<quantity id="B9769B46FFAAFF87505EB2D1FEBFFB1E" box="[279,343,1160,1185]" metricMagnitude="-1" metricUnit="m" metricValue="1.651" pageId="2" pageNumber="230" unit="in" value="6.5">6.5 in</quantity>
10 μm versus
<quantity id="B9769B46FFAAFF8750B2B2D1FDAAFB1E" box="[507,578,1160,1185]" metricMagnitude="-1" metricUnit="m" metricValue="1.524" metricValueMax="1.778" metricValueMin="1.27" pageId="2" pageNumber="230" unit="in" value="6.0" valueMax="7.0" valueMin="5.0">57 in</quantity>
10 μm) and striae (
<quantity id="B9769B46FFAAFF875255B2D1FCBEFB1E" box="[796,854,1160,1185]" metricMagnitude="-1" metricUnit="m" metricValue="6.858" pageId="2" pageNumber="230" unit="in" value="27.0">27 in</quantity>
10 μm versus
<quantity id="B9769B46FFAAFF8752B2B2D1FBB5FB1E" box="[1019,1117,1160,1185]" metricMagnitude="-1" metricUnit="m" metricValue="5.715" metricValueMax="5.842" metricValueMin="5.588" pageId="2" pageNumber="230" unit="in" value="22.5" valueMax="23.0" valueMin="22.0">2223 in</quantity>
10 μm). These Asian species, like the fossil extant taxa from Europe, have lanceolate outlines and lack the undulate outlines of
<taxonomicName id="B98E4D20FFAAFF87544BB2F5FA90FB7A" box="[1282,1400,1196,1221]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="sinuata">
<emphasis id="4CFAEAB1FFAAFF87544BB2F5FAFDFB7A" box="[1282,1301,1196,1221]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87546FB2F5FA90FB7A" box="[1318,1400,1196,1221]" italics="true" pageId="2" pageNumber="230">sinuata</emphasis>
</taxonomicName>
and inflation found in
<taxonomicName id="B98E4D20FFAAFF87501AB289FE0AFB56" box="[339,482,1232,1257]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="tabellaria">
<emphasis id="4CFAEAB1FFAAFF87501AB289FE8EFB56" box="[339,358,1232,1257]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87503DB289FE0AFB56" box="[372,482,1232,1257]" italics="true" pageId="2" pageNumber="230">tabellaria</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="7E3136A3FFAAFF8751F4B2ADFC53FA8E" blockId="2.[136,1452,800,1329]" pageId="2" pageNumber="230">
The second group of species includes those with undulate margins, and is comprised of
<taxonomicName id="B98E4D20FFAAFF87553CB2ADFB0DFAB2" box="[1141,1253,1268,1293]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="sinuata">
<emphasis id="4CFAEAB1FFAAFF87553CB2ADFB60FAB2" box="[1141,1160,1268,1293]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF8755DAB2ADFB0DFAB2" box="[1171,1253,1268,1293]" italics="true" pageId="2" pageNumber="230">sinuata</emphasis>
</taxonomicName>
and
<taxonomicName id="B98E4D20FFAAFF87545EB2ADFA4CFAB2" box="[1303,1444,1268,1293]" class="Insecta" family="Menoponidae" genus="Nitzschia" kingdom="Animalia" order="Psocodea" pageId="2" pageNumber="230" phylum="Arthropoda" rank="species" species="tabellaria">
<emphasis id="4CFAEAB1FFAAFF87545EB2ADFAC2FAB2" box="[1303,1322,1268,1293]" italics="true" pageId="2" pageNumber="230">N</emphasis>
.
<emphasis id="4CFAEAB1FFAAFF87547FB2ADFA4CFAB2" box="[1334,1444,1268,1293]" italics="true" pageId="2" pageNumber="230">tabellaria</emphasis>
</taxonomicName>
. We include observations of the latter species from
<collectingCountry id="06997633FFAAFF8753F6B341FCEAFA8E" box="[703,770,1304,1329]" name="China" pageId="2" pageNumber="230">China</collectingCountry>
for comparison.
</paragraph>
</subSubSection>
</treatment>
</document>