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232 lines
17 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.131.36983" ID-GBIF-Dataset="3099cbb5-2a81-4b55-8401-69313f7a1532" ID-PMC="PMC6742673" ID-Pensoft-Pub="1314-2003-131-57" ID-Pensoft-UUID="18E94FF80CA35C42B45D1A53CD92065F" ID-PubMed="31565024" ID-Zenodo-Dep="3406907" ModsDocID="1314-2003-131-57" checkinTime="1567745833710" checkinUser="pensoft" docAuthor="Pereira, Jovani B. de S., Guimaraes, Jose Tasso F. & Watanabe, Mauricio T. C." docDate="2019" docId="41EDF34DE65C57B880ADBB40A6A0E227" docLanguage="en" docName="PhytoKeys 131: 57-67" docOrigin="PhytoKeys 131" docSource="http://dx.doi.org/10.3897/phytokeys.131.36983" docTitle="Isoetes dubsii J. B. S. Pereira 2019, sp. nov." docType="treatment" docVersion="6" id="18E94FF80CA35C42B45D1A53CD92065F" lastPageNumber="57" masterDocId="18E94FF80CA35C42B45D1A53CD92065F" masterDocTitle="Isoetes dubsii and Isoetes santacruzensis, two new species from lowland areas in South America" masterLastPageNumber="67" masterPageNumber="57" pageNumber="57" updateTime="1668139485232" updateUser="ExternalLinkService">
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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>Isoetes dubsii and Isoetes santacruzensis, two new species from lowland areas in South America</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>Pereira, Jovani B. de S.</mods:namePart>
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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>Guimaraes, Jose Tasso F.</mods:namePart>
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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>Watanabe, Mauricio T. C.</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>PhytoKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2019</mods:date>
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<mods:detail type="volume">
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<mods:number>131</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>57</mods:start>
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<mods:end>67</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/10.3897/phytokeys.131.36983</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">http://dx.doi.org/10.3897/phytokeys.131.36983</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-131-57</mods:identifier>
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<mods:identifier type="Pensoft-UUID">18E94FF80CA35C42B45D1A53CD92065F</mods:identifier>
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<mods:identifier type="Zenodo-Dep">3406907</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="159413382" LSID="urn:lsid:plazi:treatment:41EDF34DE65C57B880ADBB40A6A0E227" httpUri="http://treatment.plazi.org/id/41EDF34DE65C57B880ADBB40A6A0E227" lastPageNumber="57" pageId="0" pageNumber="57">
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<subSubSection pageId="0" pageNumber="57" type="nomenclature">
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<paragraph pageId="0" pageNumber="57">
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<taxonomicName LSID="41EDF34D-E65C-57B8-80AD-BB40A6A0E227" authority="J. B. S. Pereira" authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii" status="sp. nov.">Isoetes dubsii J.B.S.Pereira</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="57">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Type of Isoetes dubsii (image courtesy of the herbarium Z / ZT). Note that the name Isoetes flexuosa J. B. S. Pereira on the label sheet is a provisional, never published, name. Photographer: Franziska Schmid" figureDoi="10.3897/phytokeys.131.36983.figure1" httpUri="https://binary.pensoft.net/fig/331199" pageId="0" pageNumber="57" tableDoi="10.3897/phytokeys.131.36983.figure1">Figs 1</figureCitation>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. SEM images of the mega- and microspores of Isoetes dubsii (Dubs 829, Z / ZT), I. santacruzensis (Killeen et al. 7131, MO), I. pedersenii (Troels 8105, L) and I. panamensis (Balansa 3294, P)." figureDoi="10.3897/phytokeys.131.36983.figure2" httpUri="https://binary.pensoft.net/fig/331200" pageId="0" pageNumber="57" tableDoi="10.3897/phytokeys.131.36983.figure2">, 2</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="diagnosis">
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<paragraph pageId="0" pageNumber="57">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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is distinguished from other species from the Brazilian Pantanal wetlands by a set of characters that include leaves that are long (90-100 cm), flexuous and trigonal in the transverse section, tri-lobated stems, rudimentary velum, pustulate and small megaspores of 310-390
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<normalizedToken originalValue="µm">µm</normalizedToken>
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in diameter (average 350
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<normalizedToken originalValue="µm">µm</normalizedToken>
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) and laesurae of the megaspore at least four times wider than high.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="materials_examined">
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<paragraph pageId="0" pageNumber="57">Type.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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BRAZIL. Mato Grosso do Sul: Fazenda Salina, Pantanal do Rio Negro,
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<geoCoordinate degrees="19" direction="south" minutes="30" orientation="latitude" precision="925" value="-19.5">19°30'S</geoCoordinate>
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,
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<geoCoordinate degrees="56" direction="west" minutes="10" orientation="longitude" precision="925" value="-56.166668">56°10'W</geoCoordinate>
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, 3 Jun 1988,
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<emphasis italics="true" pageId="0" pageNumber="57">Dubs 829</emphasis>
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(holotype: Z!).
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</paragraph>
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<caption ID-Zenodo-Dep="3487967" doi="10.3897/phytokeys.131.36983.figure1" httpUri="https://binary.pensoft.net/fig/331199" pageId="0" pageNumber="57" start="Figure 1" startId="F1">
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<paragraph pageId="0" pageNumber="57">
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<emphasis bold="true" pageId="0" pageNumber="57">Figure 1.</emphasis>
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Type of
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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(image courtesy of the herbarium Z/ZT). Note that the name
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<taxonomicName class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes flexuosa" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="flexuosa">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes flexuosa</emphasis>
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</taxonomicName>
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J.B.S. Pereira on the label sheet is a provisional, never published, name. Photographer: Franziska Schmid
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</paragraph>
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</caption>
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<caption ID-Zenodo-Dep="3487969" doi="10.3897/phytokeys.131.36983.figure2" httpUri="https://binary.pensoft.net/fig/331200" pageId="0" pageNumber="57" start="Figure 2" startId="F2">
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<paragraph pageId="0" pageNumber="57">
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<emphasis bold="true" pageId="0" pageNumber="57">Figure 2.</emphasis>
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SEM images of the mega- and microspores of
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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(
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<emphasis italics="true" pageId="0" pageNumber="57">Dubs 829</emphasis>
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, Z/ZT),
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<taxonomicName lsidName="I. santacruzensis" pageId="0" pageNumber="57" rank="species" species="santacruzensis">
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<emphasis italics="true" pageId="0" pageNumber="57">I. santacruzensis</emphasis>
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</taxonomicName>
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(
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<emphasis italics="true" pageId="0" pageNumber="57">Killeen et al. 7131</emphasis>
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, MO),
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<taxonomicName lsidName="I. pedersenii" pageId="0" pageNumber="57" rank="species" species="pedersenii">
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<emphasis italics="true" pageId="0" pageNumber="57">I. pedersenii</emphasis>
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</taxonomicName>
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(
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<emphasis italics="true" pageId="0" pageNumber="57">Troels 8105</emphasis>
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, L) and
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<taxonomicName lsidName="I. panamensis" pageId="0" pageNumber="57" rank="species" species="panamensis">
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<emphasis italics="true" pageId="0" pageNumber="57">I. panamensis</emphasis>
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</taxonomicName>
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(
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<emphasis italics="true" pageId="0" pageNumber="57">Balansa 3294</emphasis>
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, P).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="description">
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<paragraph pageId="0" pageNumber="57">Description.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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Plants aquatic submerged, growing in fresh water ponds. Roots conspicuous, dichotomous. Stems globose, 3-lobate, ca. 2 cm wide. Leaves 90-100 cm long, 0.2-0.3 cm wide at mid length, 50-60 per individual, linear, flexuous, erect, apex attenuate; alae 12-13 cm long, extending from the base ca. 1/10 of total leaf length, red-brown, membranaceous, apex attenuate; subula olive-green, trigonal. Labium present, persistent, 1.5-2.0
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<normalizedToken originalValue="×">x</normalizedToken>
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2.0-2.5 mm, cordate. Ligula not observed in herbarium material. Velum rudimentary. Sclerified phyllopodia absent. Sporangium at the base of the leaf, 8-12
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<normalizedToken originalValue="×">x</normalizedToken>
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3-4 mm, oblong, light brown, concolorous. Megaspores 310-390
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<normalizedToken originalValue="µm">µm</normalizedToken>
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in diameter (average = 350
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<normalizedToken originalValue="µm">µm</normalizedToken>
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,
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<emphasis italics="true" pageId="0" pageNumber="57">n</emphasis>
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= 20), trilete, white, not lustrous; proximal and distal surfaces pustulate, macrosculpture 3-8
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<normalizedToken originalValue="×">x</normalizedToken>
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22-45
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<normalizedToken originalValue="µm">µm</normalizedToken>
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, wider than high; laesurae 8-10
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<normalizedToken originalValue="×">x</normalizedToken>
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45-55
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<normalizedToken originalValue="µm">µm</normalizedToken>
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, at least four times wider than high. Microspores 31-36
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<normalizedToken originalValue="µm">µm</normalizedToken>
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long (average = 34
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<normalizedToken originalValue="µm">µm</normalizedToken>
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,
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<emphasis italics="true" pageId="0" pageNumber="57">n</emphasis>
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= 20), light brown, monolete, proximal surface smooth, distal surface sparsely echinate.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="distribution">
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<paragraph pageId="0" pageNumber="57">Distribution and habitat.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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This species is only known from its type locality (state of Mato Grosso do Sul, Brazil;
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<figureCitation captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Map showing the type locations of Isoetes dubsii and I. santacruzensis." figureDoi="10.3897/phytokeys.131.36983.figure3" httpUri="https://binary.pensoft.net/fig/331201" pageId="0" pageNumber="57" tableDoi="10.3897/phytokeys.131.36983.figure3">Fig. 3</figureCitation>
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), where it grows in a fresh water pond at ca. 100 m a.s.l. Although we tried to re-collect
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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in the area indicated by Balthasar Dubs, no additional collections have been made.
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</paragraph>
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<caption ID-Zenodo-Dep="3487971" doi="10.3897/phytokeys.131.36983.figure3" httpUri="https://binary.pensoft.net/fig/331201" pageId="0" pageNumber="57" start="Figure 3" startId="F3">
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<paragraph pageId="0" pageNumber="57">
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<emphasis bold="true" pageId="0" pageNumber="57">Figure 3.</emphasis>
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Map showing the type locations of
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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and
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<taxonomicName lsidName="I. santacruzensis" pageId="0" pageNumber="57" rank="species" species="santacruzensis">
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<emphasis italics="true" pageId="0" pageNumber="57">I. santacruzensis</emphasis>
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</taxonomicName>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="etymology">
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<paragraph pageId="0" pageNumber="57">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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The specific epithet honours the Swiss ornithologist and botanist B. Dubs, for his valuable contributions to the knowledge of the flora and fauna of the Pantanal wetlands of Brazil. He was also the first naturalist to collect
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<taxonomicName authorityName="J. B. S. Pereira" authorityYear="2019" class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes dubsii" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes dubsii</emphasis>
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</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="notes">
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<paragraph pageId="0" pageNumber="57">Notes.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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Amongst the species found in Brazilian Pantanal wetlands,
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<taxonomicName class="Lycopodiopsida" family="Isoetaceae" genus="Isoetes" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Isoetes panamensis" order="Isoetales" pageId="0" pageNumber="57" phylum="Tracheophyta" rank="species" species="panamensis">
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<emphasis italics="true" pageId="0" pageNumber="57">Isoetes panamensis</emphasis>
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</taxonomicName>
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Maxon C.V. Morton
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<emphasis italics="true" pageId="0" pageNumber="57">sensu lato</emphasis>
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is similar to
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<taxonomicName lsidName="I. dubsii" pageId="0" pageNumber="57" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">I. dubsii</emphasis>
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</taxonomicName>
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due to its long leaves up to 80 cm. However, the megaspores in
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<taxonomicName lsidName="I. panamensis" pageId="0" pageNumber="57" rank="species" species="panamensis">
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<emphasis italics="true" pageId="0" pageNumber="57">I. panamensis</emphasis>
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</taxonomicName>
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are 380-600
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<normalizedToken originalValue="µm">µm</normalizedToken>
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(vs. 310-390
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<normalizedToken originalValue="µm">µm</normalizedToken>
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) in diameter and baculate (vs. pustulate) (
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. SEM images of the mega- and microspores of Isoetes dubsii (Dubs 829, Z / ZT), I. santacruzensis (Killeen et al. 7131, MO), I. pedersenii (Troels 8105, L) and I. panamensis (Balansa 3294, P)." figureDoi="10.3897/phytokeys.131.36983.figure2" httpUri="https://binary.pensoft.net/fig/331200" pageId="0" pageNumber="57" tableDoi="10.3897/phytokeys.131.36983.figure2">Fig. 2</figureCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="57" type="conservation status">
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<paragraph pageId="0" pageNumber="57">Conservation status.</paragraph>
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<paragraph pageId="0" pageNumber="57">
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Since
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<taxonomicName lsidName="I. dubsii" pageId="0" pageNumber="57" rank="species" species="dubsii">
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<emphasis italics="true" pageId="0" pageNumber="57">I. dubsii</emphasis>
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</taxonomicName>
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is currently known from a single locality, it may deserve special attention concerning its conservation status. However, based on our current knowledge on this species and according to IUCN Red List criteria (
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<bibRefCitation author="IUCN" journalOrPublisher="IUCN, Gland, Switzerland and Cambridge, UK" pageId="0" pageNumber="57" publicationUrl="http://www.iucnredlist.org/technical-documents/categories-and-criteria" refId="B5" refString="IUCN, 2012. IUCN Red List Categories and Criteria: Version 3.1. Second edition. IUCN, Gland, Switzerland and Cambridge, UK, http://www.iucnredlist.org/technical-documents/categories-and-criteria" title="IUCN Red List Categories and Criteria: Version 3.1. Second edition." url="http://www.iucnredlist.org/technical-documents/categories-and-criteria" year="2012">IUCN 2012</bibRefCitation>
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), it is assessed here as data deficient (DD).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |