208 lines
28 KiB
XML
208 lines
28 KiB
XML
<document id="20E8238FFBC0971D64E6E5105E5317EB" ID-CLB-Dataset="7722" ID-DOI="10.5252/g2011n1a4" ID-GBIF-Dataset="bf362508-4a23-4fb9-ad93-d75fe2d5cd7d" ID-ISSN="1638-9395" ID-Zenodo-Dep="4596948" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1615470150520" checkinUser="felipe" docAuthor="Galtier, Jean, Ronchi, Ausonio & Broutin, Jean" docDate="2011" docId="5328C915CD690D18B73002ADAC27B1F1" docLanguage="en" docName="Geodiversitas.33.1.43-69.pdf" docOrigin="Geodiversitas 33 (1)" docSource="http://dx.doi.org/10.5252/g2011n1a4" docStyle="DocumentStyle:DF8BFA78045876A77BB343B212438C9A.3:Geodiversitas.2011-2012.journal_article.type1" docStyleId="DF8BFA78045876A77BB343B212438C9A" docStyleName="Geodiversitas.2011-2012.journal_article.type1" docStyleVersion="3" docTitle="Arthropitys bistriata Goeppert 1864" docType="treatment" docVersion="9" lastPageNumber="52" masterDocId="AF11B16DCD6E0D11B471027AAE20B31F" masterDocTitle="Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France)" masterLastPageNumber="69" masterPageNumber="43" pageNumber="50" updateTime="1698933071233" updateUser="ExternalLinkService" zenodo-license-document="CC0-1.0" zenodo-license-figures="CC0-1.0">
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<mods:title id="E4B6848129A99C79C3FBA5F220D4689D">Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France)</mods:title>
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<mods:name id="6C2B6E7DF6516F2C081FE944DEBD01DD" type="personal">
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<mods:namePart id="EF7BDB9541596430B13B57E7CDBE387F">Galtier, Jean</mods:namePart>
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<mods:namePart id="C72469CCD0D6B11913728E3F4D3E23DA">Ronchi, Ausonio</mods:namePart>
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<mods:namePart id="B7A7C02DC1A26FAE893BF226E03D9BCC">Broutin, Jean</mods:namePart>
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<mods:title id="7289999EB536F2F13CB70AB790DD09F7">Geodiversitas</mods:title>
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<mods:date id="D317F1C901F02E6062CA38B8901465ED">2011</mods:date>
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<mods:number id="5B29D265335B8CBD6A70EAA3AC755BF4">2011-03-31</mods:number>
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<treatment id="5328C915CD690D18B73002ADAC27B1F1" ID-DOI="http://doi.org/10.5281/zenodo.4607877" ID-GBIF-Taxon="180584117" ID-Zenodo-Dep="4607877" LSID="urn:lsid:plazi:treatment:5328C915CD690D18B73002ADAC27B1F1" httpUri="http://treatment.plazi.org/id/5328C915CD690D18B73002ADAC27B1F1" lastPageId="9" lastPageNumber="52" pageId="7" pageNumber="50">
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<subSubSection id="939B2B88CD690D16B73002ADAA11B20C" pageId="7" pageNumber="50" type="nomenclature">
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<paragraph id="DB3E7803CD690D16B73002ADAA11B20C" blockId="7.[813,1073,215,306]" pageId="7" pageNumber="50">
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<heading id="8076CF6FCD690D16B73002ADAA11B20C" centered="true" fontSize="11" level="2" pageId="7" pageNumber="50" reason="2">
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<taxonomicName id="1C810380CD690D16B73002ADAA11B20C" authority="(Cotta) Goeppert, 1864" authorityName="Goeppert" authorityYear="1864" baseAuthorityName="Cotta" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="7" pageNumber="50" phylum="Tracheophyta" rank="species" species="bistriata">
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<emphasis id="E9F5A411CD690D16B73002ADAA3DB3ED" bold="true" box="[833,1053,215,242]" italics="true" pageId="7" pageNumber="50">Arthropitys bistriata</emphasis>
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(Cotta) Goeppert, 1864
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</taxonomicName>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="939B2B88CD690D18B720036DAC27B1F1" lastPageId="9" lastPageNumber="52" pageId="7" pageNumber="50" type="description">
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<paragraph id="DB3E7803CD690D16B720036DAA2DB22D" blockId="7.[813,1073,215,306]" box="[849,1037,279,306]" pageId="7" pageNumber="50">
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<heading id="8076CF6FCD690D16B720036DAA2DB22D" box="[849,1037,279,306]" centered="true" fontSize="11" level="2" pageId="7" pageNumber="50" reason="2">
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(
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<figureCitation id="43BA6486CD690D16B728036DADB8B22D" box="[857,920,279,306]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4</figureCitation>
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B-D, F, G)
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</heading>
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</paragraph>
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<paragraph id="DB3E7803CD690D16B6D4032DAA18B093" blockId="7.[674,1212,343,1573]" pageId="7" pageNumber="50">
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We attribute a number of stems showing a wide range of sizes and of secondary xylem thickness to this species. The small stem (
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<figureCitation id="43BA6486CD690D16B7BA03ECAA39B2AE" box="[971,1049,406,433]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4B</figureCitation>
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) has a diameter of 19 ×
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including the cortex; it shows a small development of secondary xylem (
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<quantity id="1C79D5E6CD690D16B07103AFAA73B2EF" box="[1024,1107,469,496]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="7" pageNumber="50" unit="mm" value="0.5">0.5 mm</quantity>
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thick, i.e. about 15 tracheids); 62 primary xylem strands with carinal canals (
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<quantity id="1C79D5E6CD690D16B74D006FADA2B12F" box="[828,898,533,560]" metricMagnitude="-2" metricUnit="m" metricValue="8.0" pageId="7" pageNumber="50" unit="mm" value="80.0">80 µm</quantity>
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in diameter) are surrounding the pith at
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<quantity id="1C79D5E6CD690D16B76A004EAD51B150" box="[795,881,564,591]" metricMagnitude="-4" metricUnit="m" metricValue="7.0" pageId="7" pageNumber="50" unit="mm" value="0.7">0.7 mm</quantity>
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intervals (
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<figureCitation id="43BA6486CD690D16B793004EAA15B150" box="[994,1077,564,591]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4F</figureCitation>
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). Secondary xylem wedges are separated by interfascicular rays that are 5-6 cells wide. The outer sclerenchymatous cortex is well preserved as well as groups of large cells in the inner cortex (arrow,
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<figureCitation id="43BA6486CD690D16B05D00C9AA5CB1D1" box="[1068,1148,691,718]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4F</figureCitation>
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). This young stem shows the beginning of development of secondary xylem. In its general organization, small amount of secondary xylem and cortex anatomy, it is very similar to specimens of
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<taxonomicName id="1C810380CD690D16B0620148AD6BB074" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="7" pageNumber="50" phylum="Tracheophyta" rank="variety" species="bistriata" variety="augustodunensis">
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<emphasis id="E9F5A411CD690D16B0620148AAABB053" box="[1043,1163,818,844]" italics="true" pageId="7" pageNumber="50">A. bistriata</emphasis>
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var.
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<emphasis id="E9F5A411CD690D16B6D7012BAD6BB074" box="[678,843,849,875]" italics="true" pageId="7" pageNumber="50">augustodunensis</emphasis>
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</taxonomicName>
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from Autun illustrated by
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<bibRefCitation id="BF1005F2CD690D16B014012BACC9B093" author="RENAULT B." pageId="7" pageNumber="50" refId="ref13859" refString="RENAULT B. 1893 - 1896. - Bassin houiller et permien d'Autun et d'Epinac. IV. Flore fossile: Atlas (1893); Texte (1896). Etude des Gites mineraux de la France. Imprimerie Nationale, Paris, 578 p." type="book" year="1893">Renault (1893</bibRefCitation>
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: pl. 46, fig. 7; pl. 47, figs 1, 2).
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</paragraph>
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<paragraph id="DB3E7803CD690D16B6CA01EBAA99B53A" blockId="7.[674,1212,343,1573]" pageId="7" pageNumber="50">
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Other observed specimens belonged to older parts of plants, with a wood thickness ranging from
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<quantity id="1C79D5E6CD690D16B0D801CAAD35B0F4" metricMagnitude="-2" metricUnit="m" metricValue="3.05" metricValueMax="6.0" metricValueMin="0.1" pageId="7" pageNumber="50" unit="mm" value="30.5" valueMax="60.0" valueMin="1.0">1 to 60 mm</quantity>
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, but generally the cortex is missing. For example the stem (
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<figureCitation id="43BA6486CD690D16B71D018AAD9EB714" box="[876,958,1008,1035]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4C</figureCitation>
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) has a wood of
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<quantity id="1C79D5E6CD690D16B01B018AAA9AB714" box="[1130,1210,1008,1035]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="7" pageNumber="50" unit="mm" value="10.0">10 mm</quantity>
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thick; it represents probably one third of the original woody cylinder.About 30 primary xylem strands are visible; carinal canals are
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<quantity id="1C79D5E6CD690D16B7EF0635AA18B775" box="[926,1080,1103,1130]" metricMagnitude="-1" metricUnit="m" metricValue="1.75" metricValueMax="2.5" metricValueMin="1.0" pageId="7" pageNumber="50" unit="mm" value="175.0" valueMax="250.0" valueMin="100.0">100 to 250 µm</quantity>
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in diameter, their preservation may be excellent (
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<figureCitation id="43BA6486CD690D16B05B0615AA5FB795" box="[1066,1151,1135,1162]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4G</figureCitation>
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) and sometimes there is no lacuna (arrow,
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<figureCitation id="43BA6486CD690D16B05D06F4AA5FB7B6" box="[1068,1151,1166,1193]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Fig. 4C</figureCitation>
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). The average distance between carinal canals is
|
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<quantity id="1C79D5E6CD690D16B00106D4AA95B7D6" box="[1136,1205,1198,1225]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="7" pageNumber="50" unit="mm" value="1.0">1 mm</quantity>
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, it may be up to
|
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<quantity id="1C79D5E6CD690D16B72506B4ADB6B7F6" box="[852,918,1230,1257]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="7" pageNumber="50" unit="mm" value="2.0">2 mm</quantity>
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in stems with wood several centimetres thick. In transverse section, interfascicular rays are less than
|
||
<quantity id="1C79D5E6CD690D16B7D10777ADFFB637" box="[928,991,1293,1320]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="7" pageNumber="50" unit="mm" value="1.0">1 mm</quantity>
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wide, made of 5 to 8 parenchymatous cells, and they are generally visible through the whole secondary xylem. The secondary xylem wedges consist of rays and tracheids showing an initial quick increase of their diameter from
|
||
<quantity id="1C79D5E6CD690D16B0EC07F6AD27B6D9" metricMagnitude="-2" metricUnit="m" metricValue="5.0" metricValueMax="7.0" metricValueMin="3.0" pageId="7" pageNumber="50" unit="mm" value="50.0" valueMax="70.0" valueMin="30.0">30 to 70 µm</quantity>
|
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(
|
||
<figureCitation id="43BA6486CD690D16B76507D1ADA2B6D9" box="[788,898,1451,1478]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50">Figs 4F, G</figureCitation>
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||
). Some specimens consist of a single fragment of wood including a portion of the pith and a few primary xylem strands. The observed maximum wood thickness of
|
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<quantity id="1C79D5E6CD690D16B7990470AA19B53A" box="[1000,1081,1546,1573]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="7" pageNumber="50" unit="mm" value="60.0">60 mm</quantity>
|
||
suggests an
|
||
</paragraph>
|
||
<caption id="8FFE288BCD690D16B4030419AA9AB5BE" ID-DOI="http://doi.org/10.5281/zenodo.4607875" ID-Zenodo-Dep="4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="7" pageNumber="50" targetBox="[178,1145,216,1501]" targetPageId="8">
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<paragraph id="DB3E7803CD690D16B4030419AA9AB5BE" blockId="7.[113,1210,1635,1697]" pageId="7" pageNumber="50">
|
||
FIG. 4. — Silicified plants from the Permian of Sardinia:
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<emphasis id="E9F5A411CD690D16B6300419AC6EB56B" bold="true" box="[577,590,1635,1652]" pageId="7" pageNumber="50">A</emphasis>
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,
|
||
<emphasis id="E9F5A411CD690D16B6280419AC45B56B" bold="true" box="[601,613,1635,1652]" pageId="7" pageNumber="50">E</emphasis>
|
||
,
|
||
<taxonomicName id="1C810380CD690D16B6010419AD5AB56B" authority="Boureau" authorityName="Boureau" authorityYear="1964" box="[624,890,1635,1652]" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="7" pageNumber="50" phylum="Tracheophyta" rank="species" species="renaultii">
|
||
<emphasis id="E9F5A411CD690D16B6010419ACEBB56B" box="[624,715,1635,1652]" italics="true" pageId="7" pageNumber="50">Arthropitys</emphasis>
|
||
cf.
|
||
<emphasis id="E9F5A411CD690D16B69B0419AD0BB56B" box="[746,811,1635,1652]" italics="true" pageId="7" pageNumber="50">renaultii</emphasis>
|
||
Boureau
|
||
</taxonomicName>
|
||
;
|
||
<emphasis id="E9F5A411CD690D16B7F30419ADAFB56B" bold="true" box="[898,911,1635,1652]" pageId="7" pageNumber="50">A</emphasis>
|
||
, transverse section of a young twig (SAR01B1B01);
|
||
<emphasis id="E9F5A411CD690D16B4860403AF23B595" bold="true" box="[247,259,1657,1674]" pageId="7" pageNumber="50">E</emphasis>
|
||
, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (
|
||
<emphasis id="E9F5A411CD690D16B4D104EAAE8EB5BE" bold="true" box="[160,174,1680,1697]" pageId="7" pageNumber="50">C</emphasis>
|
||
) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow);
|
||
<emphasis id="E9F5A411CD690D16B7B004EAADC3B5BE" bold="true" box="[961,995,1680,1697]" pageId="7" pageNumber="50">B -D</emphasis>
|
||
,
|
||
<emphasis id="E9F5A411CD690D16B79C04EAADD8B5BE" bold="true" box="[1005,1016,1680,1697]" pageId="7" pageNumber="50">F</emphasis>
|
||
,
|
||
<emphasis id="E9F5A411CD690D16B07004EAAA2FB5BE" bold="true" box="[1025,1039,1680,1697]" pageId="7" pageNumber="50">G</emphasis>
|
||
,
|
||
<taxonomicName id="1C810380CD690D16B06804EAAA9AB5BE" authorityName="Goeppert" authorityYear="1864" baseAuthorityName="Cotta" box="[1049,1210,1680,1697]" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="7" pageNumber="50" phylum="Tracheophyta" rank="species" species="bistriata">Arthropitys bistriata</taxonomicName>
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="DB3E7803CD660D19B4000464AA69B5BE" blockId="8.[113,1211,1566,1697]" pageId="8" pageNumber="51">
|
||
(Cotta) Goeppert;
|
||
<emphasis id="E9F5A411CD660D19B5770464AF33B530" bold="true" box="[262,275,1566,1583]" pageId="8" pageNumber="51">B</emphasis>
|
||
, incomplete transverse section of a young stem showing a little development of secondary xylem (SAR40C1T03);
|
||
<emphasis id="E9F5A411CD660D19B400044FAE5FB559" bold="true" box="[113,127,1589,1606]" pageId="8" pageNumber="51">C</emphasis>
|
||
, partial transverse section of an older stem with thick secondary xylem and well-marked interfasciculary rays (SAR58C1B01);
|
||
<emphasis id="E9F5A411CD660D19B0FB044FAAB8B559" bold="true" box="[1162,1176,1589,1606]" pageId="8" pageNumber="51">D</emphasis>
|
||
, radial longitudinal section in the secondary xylem showing scalariform pitting of tracheids and high ray cells on the left (SAR51BL01);
|
||
<emphasis id="E9F5A411CD660D19B4000418AE5CB56C" bold="true" box="[113,124,1634,1651]" pageId="8" pageNumber="51">F</emphasis>
|
||
, detail of the stem (
|
||
<emphasis id="E9F5A411CD660D19B5510418AF0DB56C" bold="true" box="[288,301,1634,1651]" pageId="8" pageNumber="51">B</emphasis>
|
||
) showing two primary xylem strands with circular carinal canals, one interfascicular ray, small development of secondary xylem, cluster of large cells (arrow) in inner cortex and sclerenchymatous outer cortex;
|
||
<emphasis id="E9F5A411CD660D19B7FC0403ADBBB595" bold="true" box="[909,923,1657,1674]" pageId="8" pageNumber="51">G</emphasis>
|
||
, detail of one primary xylem strand and secondary xylem wedge of a stem with thick wood (SAR51A01). Scale bars: A-C,
|
||
<quantity id="1C79D5E6CD660D19B74F04EAAD50B5BE" box="[830,880,1680,1697]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="8" pageNumber="51" unit="mm" value="1.0">1 mm</quantity>
|
||
; E-G,
|
||
<quantity id="1C79D5E6CD660D19B7D204EAADC4B5BE" box="[931,996,1680,1697]" metricMagnitude="-4" metricUnit="m" metricValue="5.0" pageId="8" pageNumber="51" unit="mm" value="0.5">0.5 mm</quantity>
|
||
; D, 100 μm.
|
||
</paragraph>
|
||
<paragraph id="DB3E7803CD670D18B40002A2AC27B1F1" blockId="9.[111,648,216,750]" pageId="9" pageNumber="52">
|
||
original stem diameter of at least
|
||
<quantity id="1C79D5E6CD670D18B5CE02A2AC20B3EC" box="[447,512,216,243]" metricMagnitude="-1" metricUnit="m" metricValue="1.5" pageId="9" pageNumber="52" unit="cm" value="15.0">15 cm</quantity>
|
||
if we include the pith and cortex. This corresponds to some specimens of
|
||
<taxonomicName id="1C810380CD670D18B4B80362AF18B22E" authorityName="Goeppert" authorityYear="1864" baseAuthorityName="Cotta" box="[201,312,279,306]" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="9" pageNumber="52" phylum="Tracheophyta" rank="species" species="bistriata">
|
||
<emphasis id="E9F5A411CD670D18B4B80362AF18B22E" box="[201,312,279,306]" italics="true" pageId="9" pageNumber="52">A. bistriata</emphasis>
|
||
</taxonomicName>
|
||
illustrated by
|
||
<bibRefCitation id="BF1005F2CD670D18B5B8036DAC42B22D" author="RENAULT B." box="[457,610,279,306]" pageId="9" pageNumber="52" refId="ref13859" refString="RENAULT B. 1893 - 1896. - Bassin houiller et permien d'Autun et d'Epinac. IV. Flore fossile: Atlas (1893); Texte (1896). Etude des Gites mineraux de la France. Imprimerie Nationale, Paris, 578 p." type="book" year="1893">Renault (1893</bibRefCitation>
|
||
: pl. 44, figs 1, 2) as well as original specimens of the species described by
|
||
<bibRefCitation id="BF1005F2CD670D18B558032DAF98B26D" author="COTTA B." box="[297,440,343,370]" pageId="9" pageNumber="52" refId="ref12729" refString="COTTA B. 1832. - Die Dendrolithen in Beziehung auf ihren inneren Bau. Arnoldische Buchhandlung, Leipzig and Dresden, 89 p." type="book" year="1832">Cotta (1832)</bibRefCitation>
|
||
. In all the observed stems the secondary xylem tracheids show scalariform thickening to pitting on their radial walls (
|
||
<figureCitation id="43BA6486CD670D18B65203ECAC58B2AE" box="[547,632,406,433]" captionStart="FIG" captionStartId="7.[114,124,1635,1652]" captionTargetId="figure-150@8.[178,788,574,995]" captionTargetPageId="8" captionText="FIG. 4. — Silicified plants from the Permian of Sardinia: A, E, Arthropitys cf. renaultii Boureau; A, transverse section of a young twig (SAR01B1B01); E, detail of the same showing the pith, primary xylem strands with carinal canals and well preserved cortex with large cells (C) in inner cortex and alternating bands of sclerenchyma and parenchyma in outer cortex (arrow); B-D, F, G, Arthropitys bistriata" figureDoi="http://doi.org/10.5281/zenodo.4607875" httpUri="https://zenodo.org/record/4607875/files/figure.png" pageId="9" pageNumber="52">Fig. 4D</figureCitation>
|
||
). All the features recognized in these specimens suggest that they belong to
|
||
<taxonomicName id="1C810380CD670D18B54203AFAFD4B2F0" authorityName="Goeppert" authorityYear="1864" baseAuthorityName="Cotta" box="[307,500,469,495]" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="9" pageNumber="52" phylum="Tracheophyta" rank="species" species="bistriata">
|
||
<emphasis id="E9F5A411CD670D18B54203AFAFD4B2F0" box="[307,500,469,495]" italics="true" pageId="9" pageNumber="52">Arthropitys bistriata</emphasis>
|
||
</taxonomicName>
|
||
. However,the original material of this species was decorticated and Cotta’s diagnosis did not include cortical features or information on young stems such as that presented by
|
||
<bibRefCitation id="BF1005F2CD670D18B4E1002EAF06B170" author="RENAULT B." box="[144,294,596,623]" pageId="9" pageNumber="52" refId="ref13859" refString="RENAULT B. 1893 - 1896. - Bassin houiller et permien d'Autun et d'Epinac. IV. Flore fossile: Atlas (1893); Texte (1896). Etude des Gites mineraux de la France. Imprimerie Nationale, Paris, 578 p." type="book" year="1893">Renault (1893</bibRefCitation>
|
||
-1896) for
|
||
<taxonomicName id="1C810380CD670D18B5E4002EAEE5B191" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="9" pageNumber="52" phylum="Tracheophyta" rank="variety" species="bistriata" variety="augustodunensis">
|
||
<emphasis id="E9F5A411CD670D18B5E4002EAC24B171" box="[405,516,596,622]" italics="true" pageId="9" pageNumber="52">A. bistriata</emphasis>
|
||
var.
|
||
<emphasis id="E9F5A411CD670D18B642002FAEE5B191" italics="true" pageId="9" pageNumber="52">augustodunensis</emphasis>
|
||
</taxonomicName>
|
||
. There is also a strong presumption that the very small stems attributed to
|
||
<taxonomicName id="1C810380CD670D18B5DB00EEAC3DB1B2" authorityName="Boureau" authorityYear="1964" box="[426,541,659,686]" class="Polypodiopsida" family="Calamitaceae" genus="Arthropitys" higherTaxonomySource="GBIF" kingdom="Plantae" order="Equisetales" pageId="9" pageNumber="52" phylum="Tracheophyta" rank="species" species="renaultii">
|
||
<emphasis id="E9F5A411CD670D18B5DB00EEAC3DB1B2" box="[426,541,659,686]" italics="true" pageId="9" pageNumber="52">A. renaultii</emphasis>
|
||
</taxonomicName>
|
||
belong to the same plant.Detailed comparison of this material is out of the scope of the present paper.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |