278 lines
48 KiB
XML
278 lines
48 KiB
XML
<document ID-DOI="10.11646/phytotaxa.561.3.5" ID-ISSN="1179-3163" ID-Zenodo-Dep="7069917" checkinTime="1662964213827" checkinUser="plazi" docAuthor="Guerrero, José M. & Vouilloud, Amelia A." docDate="2022" docId="2E1487FCF374EA3DFF01FF43FB656A9A" docLanguage="en" docName="phytotaxa.561.3.5.pdf" docOrigin="Phytotaxa 561 (3)" docSource="http://dx.doi.org/10.11646/phytotaxa.561.3.5" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.5:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="5" docTitle="Eunotia luna var. aequalis Hustedt sensu Frenguelli. Original 1933" docType="treatment" docVersion="1" lastPageNumber="294" masterDocId="D22DFF84F376EA39FF89FFDDFFBA6B2E" masterDocTitle="Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status" masterLastPageNumber="300" masterPageNumber="291" pageNumber="293" updateTime="1663075246779" updateUser="jonas" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Taxonomic revision of Eunotia luna var. aequalis f. paucistriata Frenguelli and E. luna var. aequalis f. major Frenguelli: analysis of type material, lectotypification and current taxonomic status</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Guerrero, José M.</mods:namePart>
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<mods:nameIdentifier type="ORCID">0000-0002-4733-2753</mods:nameIdentifier>
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<mods:affiliation>División Ficología “ Dr. Sebastián A. Guarrera ”, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s / n, B 1900 FWA, La Plata, Argentina. & guerrero @ fcnym. unlp. edu. ar; https: // orcid. org / 0000 - 0002 - 4733 - 2753</mods:affiliation>
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<mods:nameIdentifier type="email">guerrero@fcnym.unlp.edu.ar</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Vouilloud, Amelia A.</mods:namePart>
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<mods:nameIdentifier type="ORCID">0000-0002-9709-5127</mods:nameIdentifier>
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<mods:affiliation>División Ficología “ Dr. Sebastián A. Guarrera ”, Museo de La Plata, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s / n, B 1900 FWA, La Plata, Argentina. & avouilloud @ fcnym. unlp. edu. ar; https: // orcid. org / 0000 - 0002 - 9709 - 5127</mods:affiliation>
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<mods:nameIdentifier type="email">avouilloud@fcnym.unlp.edu.ar</mods:nameIdentifier>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
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<mods:title>Phytotaxa</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2022</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2022-09-12</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>561</mods:number>
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</mods:detail>
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<mods:detail type="issue">
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<mods:number>3</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>291</mods:start>
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<mods:end>300</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.11646/phytotaxa.561.3.5</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">10.11646/phytotaxa.561.3.5</mods:identifier>
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<mods:identifier type="ISSN">1179-3163</mods:identifier>
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<mods:identifier type="Zenodo-Dep">7069917</mods:identifier>
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</mods:mods>
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<treatment LSID="urn:lsid:plazi:treatment:2E1487FCF374EA3DFF01FF43FB656A9A" httpUri="http://treatment.plazi.org/id/2E1487FCF374EA3DFF01FF43FB656A9A" lastPageId="4" lastPageNumber="294" pageId="2" pageNumber="293">
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<subSubSection pageId="2" pageNumber="293" type="nomenclature">
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<paragraph blockId="2.[136,1452,157,220]" pageId="2" pageNumber="293">
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<heading bold="true" centered="true" fontSize="11" level="1" pageId="2" pageNumber="293" reason="1">
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<emphasis bold="true" pageId="2" pageNumber="293">
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<taxonomicName authority="Hustedt sensu Frenguelli" authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[136,764,157,184]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis bold="true" box="[136,292,157,184]" italics="true" pageId="2" pageNumber="293">Eunotia luna</emphasis>
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var.
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<emphasis bold="true" box="[356,452,157,184]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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Hustedt
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<emphasis bold="true" box="[567,632,158,184]" italics="true" pageId="2" pageNumber="293">sensu</emphasis>
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Frenguelli
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</taxonomicName>
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and
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<taxonomicName authority="Frenguelli" authorityName="Frenguelli" box="[829,1382,157,184]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis bold="true" box="[829,917,157,184]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis bold="true" box="[981,1077,157,184]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis bold="true" box="[1114,1251,158,184]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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Frenguelli
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</taxonomicName>
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(
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<figureCitation captionStart-0="FIGURES 1–15" captionStart-1="FIGURES 16–26" captionStartId-0="2.[136,243,1581,1603]" captionStartId-1="3.[136,243,1487,1509]" captionTargetBox-0="[151,1435,464,1528]" captionTargetBox-1="[152,1436,190,1463]" captionTargetId-0="figure-106@2.[151,1435,464,1528]" captionTargetId-1="figure-17@3.[151,1436,190,1463]" captionTargetPageId-0="2" captionTargetPageId-1="3" captionText-0="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." captionText-1="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi-0="http://doi.org/10.5281/zenodo.7069919" figureDoi-1="http://doi.org/10.5281/zenodo.7069925" httpUri-0="https://zenodo.org/record/7069919/files/figure.png" httpUri-1="https://zenodo.org/record/7069925/files/figure.png" pageId="2" pageNumber="293">Figs 1–26</figureCitation>
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)
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="293" type="diagnosis">
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<paragraph blockId="2.[136,1452,266,400]" pageId="2" pageNumber="293">
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<bibRefCitation author="Frenguelli, J." box="[136,335,266,292]" pageId="2" pageNumber="293" pagination="365 - 475" refId="ref6221" refString="Frenguelli, J. (1933) Contribuciones al conocimiento de las diatomeas Argentinas. VII. Diatomeas de la region de los Esteros del Ybera (en la Provincia de Corrientes). Anales del Museo Nacional de Historia Natural 37: 365 - 475." type="journal article" year="1933">Frenguelli (1933)</bibRefCitation>
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provided a brief description of
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<taxonomicName authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[702,940,266,292]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis box="[702,786,266,292]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[845,940,266,292]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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</taxonomicName>
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, pointing that specimens from Iberá showed a lower stria density than those originally described by Hustedt (
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<tableCitation box="[892,979,302,328]" captionStart="TABLE 1" captionStartId="4.[136,224,484,508]" captionTargetPageId="4" captionText="TABLE 1. Main morphometric parameters of the infraspecific taxa of Eunotia luna reported by Frenguelli (1933) for Esteros del Iberá. Comparison of measurements in the present study with those of the original descriptions and a close related" pageId="2" pageNumber="293">Table 1</tableCitation>
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). For describing
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<taxonomicName authority=", Frenguelli" authorityName="Frenguelli" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis box="[1183,1268,302,328]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[1330,1425,302,328]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis box="[136,271,339,364]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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, Frenguelli
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</taxonomicName>
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only mentioned that it differed from
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<taxonomicName authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[815,1045,338,364]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis box="[815,895,338,364]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[950,1045,338,364]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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</taxonomicName>
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by its more distantly and irregularly spaced striae.
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</paragraph>
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</subSubSection>
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||
<caption ID-DOI="http://doi.org/10.5281/zenodo.7069919" ID-Zenodo-Dep="7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="2" pageNumber="293" startId="2.[136,243,1581,1603]" targetBox="[151,1435,464,1528]" targetPageId="2">
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||
<paragraph blockId="2.[136,1452,1581,1783]" pageId="2" pageNumber="293">
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<emphasis bold="true" box="[136,297,1581,1603]" pageId="2" pageNumber="293">FIGURES 1–15</emphasis>
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.
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<taxonomicName authority="Hustedt sensu Frenguelli" authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[308,801,1581,1603]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis box="[308,433,1581,1602]" italics="true" pageId="2" pageNumber="293">Eunotia luna</emphasis>
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var
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<emphasis box="[475,556,1581,1602]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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Hustedt
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<emphasis box="[643,696,1582,1603]" italics="true" pageId="2" pageNumber="293">sensu</emphasis>
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Frenguelli
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</taxonomicName>
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and
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<taxonomicName authority="Frenguelli." authorityName="Frenguelli." box="[847,1298,1581,1603]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis box="[847,917,1581,1603]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[964,1045,1581,1602]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis box="[1071,1187,1581,1602]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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Frenguelli.
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</taxonomicName>
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1.
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<taxonomicName authority="Hustedt sensu Frenguelli. Original" authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis box="[1327,1452,1581,1602]" italics="true" pageId="2" pageNumber="293">Eunotia luna</emphasis>
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var
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<emphasis box="[172,253,1617,1638]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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Hustedt
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<emphasis box="[338,391,1618,1639]" italics="true" pageId="2" pageNumber="293">sensu</emphasis>
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Frenguelli. Original
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</taxonomicName>
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drawing of Frenguelli. 2.
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<taxonomicName authority="Frenguelli. Original" authorityName="Frenguelli. Original" box="[832,1362,1617,1639]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis box="[832,901,1617,1639]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[946,1027,1617,1638]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis box="[1051,1167,1617,1638]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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Frenguelli. Original
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</taxonomicName>
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drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching
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<taxonomicName authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[1186,1388,1653,1675]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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<emphasis box="[1186,1256,1653,1675]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[1304,1388,1653,1674]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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</taxonomicName>
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<emphasis box="[1388,1392,1653,1674]" italics="true" pageId="2" pageNumber="293">.</emphasis>
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5, 13, 15. Specimens matching to
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<taxonomicName box="[403,745,1689,1711]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis box="[403,473,1689,1711]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[521,602,1689,1710]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis box="[629,745,1689,1710]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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</taxonomicName>
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. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of
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<taxonomicName box="[922,1258,1725,1747]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
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<emphasis box="[922,991,1725,1747]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[1036,1117,1725,1746]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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f.
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<emphasis box="[1142,1258,1725,1746]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
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</taxonomicName>
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. 14. Specimen from Series 261. Scale bars = 10 µm.
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</paragraph>
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</caption>
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<subSubSection pageId="2" pageNumber="293" type="description">
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||
<paragraph blockId="2.[136,1452,1829,2072]" pageId="2" pageNumber="293">
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The valve of
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<taxonomicName authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[336,564,1829,1856]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
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||
<emphasis box="[336,416,1829,1855]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
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var.
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<emphasis box="[469,564,1829,1855]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
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</taxonomicName>
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illustrated by Frenguelli (here reproduced in
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<figureCitation box="[1068,1131,1829,1855]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="2" pageNumber="293">Fig. 1</figureCitation>
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) has a convex dorsal margin and a slightly concave to almost straight ventral margin, ends broadly cuneate and terminal nodules moderately distant from the poles. The striae are evenly spaced, alternate with very short striae at both dorsal and ventral margins, and become radiate and more densely arranged towards the poles. In comparison, the valve of
|
||
<taxonomicName class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="2" pageNumber="293" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
|
||
<emphasis box="[1186,1270,1937,1963]" italics="true" pageId="2" pageNumber="293">E. luna</emphasis>
|
||
var.
|
||
<emphasis box="[1330,1425,1937,1963]" italics="true" pageId="2" pageNumber="293">aequalis</emphasis>
|
||
f.
|
||
<emphasis box="[136,271,1974,1999]" italics="true" pageId="2" pageNumber="293">paucistriata</emphasis>
|
||
</taxonomicName>
|
||
depicted by Frenguelli (here reproduced in
|
||
<figureCitation box="[760,826,1973,1999]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="2" pageNumber="293">Fig. 2</figureCitation>
|
||
) is slightly more arcuate, with ends nose-like protracted and barely ventrally deflected. The striae are less dense and irregularly distributed, alternate with distinct short striae at both margins, and become abruptly denser at the apices.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<caption ID-DOI="http://doi.org/10.5281/zenodo.7069925" ID-Zenodo-Dep="7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294" startId="3.[136,243,1487,1509]" targetBox="[152,1436,190,1463]" targetPageId="3">
|
||
<paragraph blockId="3.[136,1452,1487,1725]" pageId="3" pageNumber="294">
|
||
<emphasis bold="true" box="[136,309,1487,1509]" pageId="3" pageNumber="294">FIGURES 16–26</emphasis>
|
||
.
|
||
<taxonomicName authority="Hustedt sensu Frenguelli" authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[321,817,1487,1509]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="3" pageNumber="294" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
|
||
<emphasis box="[321,447,1487,1509]" italics="true" pageId="3" pageNumber="294">Eunotia luna</emphasis>
|
||
var
|
||
<emphasis box="[490,571,1487,1508]" italics="true" pageId="3" pageNumber="294">aequalis</emphasis>
|
||
Hustedt
|
||
<emphasis box="[659,712,1488,1509]" italics="true" pageId="3" pageNumber="294">sensu</emphasis>
|
||
Frenguelli
|
||
</taxonomicName>
|
||
and
|
||
<taxonomicName authority="Frenguelli. SEM." authorityName="Frenguelli. SEM." box="[864,1380,1487,1509]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="3" pageNumber="294" phylum="Bacillariophyta" rank="form" species="luna" variety="aequalis">
|
||
<emphasis box="[864,934,1487,1509]" italics="true" pageId="3" pageNumber="294">E. luna</emphasis>
|
||
var.
|
||
<emphasis box="[982,1063,1487,1508]" italics="true" pageId="3" pageNumber="294">aequalis</emphasis>
|
||
f.
|
||
<emphasis box="[1090,1206,1488,1509]" italics="true" pageId="3" pageNumber="294">paucistriata</emphasis>
|
||
Frenguelli. SEM.
|
||
</taxonomicName>
|
||
16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25).
|
||
</paragraph>
|
||
</caption>
|
||
<subSubSection lastPageId="4" lastPageNumber="295" pageId="3" pageNumber="294" type="discussion">
|
||
<paragraph blockId="3.[136,1452,1772,2086]" lastBlockId="4.[136,1452,158,437]" lastPageId="4" lastPageNumber="295" pageId="3" pageNumber="294">
|
||
After examining with LM the slides corresponding to the series above mentioned, we found valves ranging from large and more arcuate to small and with the ventral margin almost straight (
|
||
<figureCitation box="[974,1089,1807,1834]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="3" pageNumber="294">Figs 3–15</figureCitation>
|
||
). Regarding the striation pattern, some of these specimens can be affiliated either to
|
||
<taxonomicName authorityName="Hustedt sensu Frenguelli. Original" authorityYear="1933" box="[711,943,1844,1870]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="3" pageNumber="294" phylum="Bacillariophyta" rank="variety" species="luna" variety="aequalis">
|
||
<emphasis box="[711,792,1844,1870]" italics="true" pageId="3" pageNumber="294">E. luna</emphasis>
|
||
var.
|
||
<emphasis box="[848,943,1844,1870]" italics="true" pageId="3" pageNumber="294">aequalis</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<figureCitation box="[958,1127,1844,1870]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="3" pageNumber="294">Figs 4, 8–9, 11</figureCitation>
|
||
) or to
|
||
<taxonomicName box="[1204,1451,1844,1870]" class="Bacillariophyceae" family="Eunotiaceae" form="paucistriata" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="3" pageNumber="294" phylum="Bacillariophyta" rank="form" species="luna">
|
||
<emphasis box="[1204,1285,1844,1870]" italics="true" pageId="3" pageNumber="294">E. luna</emphasis>
|
||
f.
|
||
<emphasis box="[1316,1451,1844,1869]" italics="true" pageId="3" pageNumber="294">paucistriata</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<figureCitation box="[144,305,1879,1906]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="3" pageNumber="294">Figs 5, 13, 15</figureCitation>
|
||
), but other ones exhibit intermediate morphologies and could not be undoubtedly assigned to one of them (
|
||
<figureCitation box="[207,462,1916,1942]" captionStart="FIGURES 1–15" captionStartId="2.[136,243,1581,1603]" captionTargetBox="[151,1435,464,1528]" captionTargetId="figure-106@2.[151,1435,464,1528]" captionTargetPageId="2" captionText="FIGURES 1–15. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. 1. Eunotia luna var aequalis Hustedt sensu Frenguelli. Original drawing of Frenguelli. 2. E. luna var. aequalis f. paucistriata Frenguelli. Original drawing. 3–15. LM. Size diminution series, note the variability in striae arrangement. 4, 8–9, 11. Specimens matching E. luna var. aequalis. 5, 13, 15. Specimens matching to E. luna var. aequalis f. paucistriata. 3, 6–7, 10, 12, 14. Specimens that could not be undoubtedly assigned to one of the mentioned taxa. 1–13, 15. Specimens from Series 268. 13. Lectotype of E. luna var. aequalis f. paucistriata. 14. Specimen from Series 261. Scale bars = 10 µm." figureDoi="http://doi.org/10.5281/zenodo.7069919" httpUri="https://zenodo.org/record/7069919/files/figure.png" pageId="3" pageNumber="294">Figs 3, 6–7, 10, 12, 14</figureCitation>
|
||
), thus hindering a clear differentiation of both taxa (see
|
||
<tableCitation box="[1091,1173,1916,1942]" captionStart="TABLE 1" captionStartId="4.[136,224,484,508]" captionTargetPageId="4" captionText="TABLE 1. Main morphometric parameters of the infraspecific taxa of Eunotia luna reported by Frenguelli (1933) for Esteros del Iberá. Comparison of measurements in the present study with those of the original descriptions and a close related" pageId="3" pageNumber="294">Table 1</tableCitation>
|
||
for morphometric data). Examined with SEM (
|
||
<figureCitation box="[385,515,1952,1978]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294">Figs 16–26</figureCitation>
|
||
), external valve face is smooth with uniseriate striae, parallel to slightly radial (
|
||
<figureCitation captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294">Figs 16–18</figureCitation>
|
||
). At the apices striae become strongly radial and surround the terminal raphe fissure (
|
||
<figureCitation box="[1199,1284,1988,2014]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294">Fig. 19</figureCitation>
|
||
). Dorsal valve mantle is perpendicular to valve face and shows striae more densely arranged (
|
||
<figureCitation box="[1019,1102,2024,2050]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294">Fig. 20</figureCitation>
|
||
), some of which extend a short way onto the valve face. Valve face is delimited from ventral mantle by a marginal, unornamented ridge (
|
||
<figureCitation box="[1309,1439,2060,2086]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="3" pageNumber="294">Figs 16–18</figureCitation>
|
||
). Areolae are round, small and located in shallow depressions with scalloped margins (
|
||
<figureCitation box="[1092,1175,158,184]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 19</figureCitation>
|
||
). Raphe sternum narrow with a filiform raphe positioned on the ventral mantle (
|
||
<figureCitation box="[746,828,194,220]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 26</figureCitation>
|
||
), with distal endings turned towards the valve face (
|
||
<figureCitation captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 19</figureCitation>
|
||
). The areolation pattern in the mantle between the raphe and the valve margin is denser and more disorganized than in the rest of the mantle (
|
||
<figureCitation box="[418,501,266,292]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 26</figureCitation>
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, arrows). No spines were observed. Internally areola openings are round and located in narrow troughs (
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||
<figureCitation box="[350,482,302,329]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Figs 21–25</figureCitation>
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). Raphe terminates in well-developed helictoglossae, positioned ventrally on the valve face and somewhat distant from the apices (
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||
<figureCitation box="[618,701,338,364]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 24</figureCitation>
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||
). One rimoportula apically positioned on the valve mantle (
|
||
<figureCitation box="[1356,1437,338,364]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 21</figureCitation>
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||
), opening internally through two parallel, sessile lips (
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||
<figureCitation box="[722,806,374,400]" captionStart="FIGURES 16–26" captionStartId="3.[136,243,1487,1509]" captionTargetBox="[152,1436,190,1463]" captionTargetId="figure-17@3.[151,1436,190,1463]" captionTargetPageId="3" captionText="FIGURES 16–26. Eunotia luna var aequalis Hustedt sensu Frenguelli and E. luna var. aequalis f. paucistriata Frenguelli. SEM. 16–20. Valves in external views. 16–18. General views 19. Detail of valve apex. 20. Valve slightly tilted showing the dorsal mantle with short striae. 21–25. Valves in internal view. 21–22. General views. 23. Detail of valve center showing the arrangement of striae. 24. Detail of the valve apex. 25. Detail of the striae in the valve center; note the areolae located in narrow troughs. 26. Tilted valve showing the raphe on the ventral mantle; note the different areolation pattern between the raphe and the valve margin (arrows). 16–20, 23–25. Specimens from Series 264. 21. Specimen from Series 261. 22. Specimen from Series 264. 26. Specimen from Series 268. Scale bars = 10 µm (Figs 16–18, 20–23, 26), 5 µm (Figs 19, 24), 2 µm (Fig. 25)." figureDoi="http://doi.org/10.5281/zenodo.7069925" httpUri="https://zenodo.org/record/7069925/files/figure.png" pageId="4" pageNumber="295">Fig. 24</figureCitation>
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); its external opening is indistinct. None of the specimens observed with SEM could be undoubtedly ascribed to either of the two taxa reported by Frenguelli.
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</paragraph>
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||
</subSubSection>
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||
</treatment>
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||
</document> |