170 lines
30 KiB
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170 lines
30 KiB
XML
<document ID-DOI="http://dx.doi.org/10.5091/plecevo.115801" ID-Pensoft-Pub="2032-3921-2-113" ID-Pensoft-UUID="061D60AFB70E58CBA7A4AB097AE0A543" ModsDocID="2032-3921-157-2-113" checkinTime="1710373867112" checkinUser="pensoft" docAuthor="Kochman-Kedziora, Natalia & Van de Vijver, Bart" docDate="2024" docId="CDE5571BE15B5BC8A8B2D3EE6ACB0124" docLanguage="en" docName="PlantEcolEvol 157(2): 113-124" docOrigin="Plant Ecology and Evolution 157 (2)" docPubDate="2024-03-13" docSource="http://dx.doi.org/10.5091/plecevo.115801" docTitle="Orthoseira tropica (Krasske) Metzeltin & Lange-Bert." docType="treatment" docVersion="1" id="061D60AFB70E58CBA7A4AB097AE0A543" lastPageNumber="113" masterDocId="061D60AFB70E58CBA7A4AB097AE0A543" masterDocTitle="The genus Orthoseira (Orthoseiraceae, Bacillariophyta) in Papua New Guinea with the description of two new species" masterLastPageNumber="124" masterPageNumber="113" pageNumber="113" updateTime="1710373867112" updateUser="pensoft">
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<mods:titleInfo id="7FCE5D6BCB490372F65FAC3E4D339CF7">
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<mods:title id="9EE1CE74852A5A1926C3C77A4CE24B38">The genus Orthoseira (Orthoseiraceae, Bacillariophyta) in Papua New Guinea with the description of two new species</mods:title>
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<mods:name id="8EE9C3553041FA6260BDFF785C873511" type="personal">
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<mods:roleTerm id="B8E4A267DCACF90E18A3D17E183406EF">Author</mods:roleTerm>
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<mods:namePart id="A946281F1128ED8DD393936FF1DC6D8C">Kochman-Kedziora, Natalia</mods:namePart>
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<mods:nameIdentifier id="2EBAE7DE3E51A9401F7967C292651551" type="ORCID">https://orcid.org/0000-0003-1006-1715</mods:nameIdentifier>
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<mods:affiliation id="208B455049F281BC4CB61A9A8EAAA380">Department of Ecology and Environmental Protection, University of Rzeszow, Rzeszow, Poland</mods:affiliation>
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</mods:name>
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<mods:name id="30702BE803F002383399D51DD3B5FB57" type="personal">
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<mods:roleTerm id="36321C10E38E0095094A807242104827">Author</mods:roleTerm>
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<mods:namePart id="02BEB1B82701AFDFAF33AAF7DC77DD66">Van de Vijver, Bart</mods:namePart>
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<mods:nameIdentifier id="CE6A9056C7606A0D050CCD3BB46B4FAA" type="ORCID">https://orcid.org/0000-0002-6244-1886</mods:nameIdentifier>
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<mods:affiliation id="5B6390CFB413E8F40247F06A16C72B27">Meise Botanic Garden Meise, Research Department, Meise, Belgium & University of Antwerp, Department of Biology - ECOSPHERE, Wilrijk, Belgium</mods:affiliation>
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<mods:nameIdentifier id="79E1600252613A05501A4B0D346EDD56" type="email">bart.vandevijver@meisebotanicgarden.be</mods:nameIdentifier>
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<mods:typeOfResource id="3B364B71B6BC0944D7FDE3892FD34657">text</mods:typeOfResource>
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<mods:title id="6C658DDCCE8C58884BCE2A8E1483162B">Plant Ecology and Evolution</mods:title>
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<mods:part id="377AC4B386797AA27E2649F7651DF7DA">
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<mods:date id="8635F22BA997BAE283253906AA86985E">2024</mods:date>
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<mods:number id="132575AAFE2F7246C818B1D48E9232F7">2024-03-13</mods:number>
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<mods:number id="663ED7D8311B65E77CE45B4DAC79B7FF">157</mods:number>
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<mods:start id="84869A923A4C115324F506167CFF5301">113</mods:start>
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<mods:url id="A380EFBCD20397247AB5A0572D8E7103">http://dx.doi.org/10.5091/plecevo.115801</mods:url>
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<mods:identifier id="CDC0D6D1C4E3D7D72AD254EE76747D8D" type="DOI">http://dx.doi.org/10.5091/plecevo.115801</mods:identifier>
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<treatment id="CDE5571BE15B5BC8A8B2D3EE6ACB0124" LSID="urn:lsid:plazi:treatment:CDE5571BE15B5BC8A8B2D3EE6ACB0124" httpUri="http://treatment.plazi.org/id/CDE5571BE15B5BC8A8B2D3EE6ACB0124" lastPageNumber="113" pageId="0" pageNumber="113">
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<subSubSection id="2E99F8B1C00A94DA8B126B722DD6ED80" pageId="0" pageNumber="113" type="nomenclature">
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<paragraph id="2C0E49DFE8932C8F45426D7482DE0BA2" pageId="0" pageNumber="113">
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<taxonomicName id="E4ADBD22E167AFE1857ECC43CD6096C1" LSID="CDE5571B-E15B-5BC8-A8B2-D3EE6ACB0124" authority="(Krasske) Metzeltin & Lange-Bert." authorityName="(Krasske) Metzeltin & Lange-Bert." class="Bacillariophyceae" family="Orthoseiraceae" genus="Orthoseira" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Orthoseira tropica" order="Melosirales" pageId="0" pageNumber="113" phylum="Bacillariophyta" rank="species" species="tropica">Orthoseira tropica (Krasske) Metzeltin & Lange-Bert.</taxonomicName>
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</paragraph>
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</subSubSection>
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<subSubSection id="AE42F14E50EA829C97BF4CF0D2DB55F7" pageId="0" pageNumber="113" type="description">
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<paragraph id="AB71C0F4DB88600CA6A5333373B4F40B" pageId="0" pageNumber="113">
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<figureCitation id="9C0530F8417167AF50883A119C1ECB17" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">Fig. 2</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="D99077B926BB49EAD563BB4BAD89C45D" pageId="0" pageNumber="113" type="reference_group">
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<paragraph id="E7EDCDE97413EFD983F07B3E5EE275D9" pageId="0" pageNumber="113">
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<taxonomicName id="C5D4EB23246189A02CB41911211F210F" authorityName="G.Krasske" authorityYear="1948" class="Coscinodiscophyceae" family="Orthoseiraceae" genus="Melosira" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Melosira roeseana subsp. var. var. tropica" order="Melosirales" pageId="0" pageNumber="113" phylum="Bacillariophyta" rank="variety" species="roeseana" subSpecies="var." variety="tropica">Melosira roeseana var. tropica</taxonomicName>
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Krasske, 1948 (
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<emphasis id="6E4C03505338331F494879A8AA48A96E" bold="true" pageId="0" pageNumber="113">basionym</emphasis>
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), Svensk Botanisk Tidskrift 42: 422, fig. 1: 1-2 (
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<bibRefCitation id="4D21168863EAC56291CE8CB4BC042A34" author="Krasske, G" journalOrPublisher="Svensk Botanisk Tidskrift" pageId="0" pageNumber="113" pagination="404 - 443" refId="B14" refString="Krasske, G, 1948. Diatomeen tropischer Moosrasen. Svensk Botanisk Tidskrift 42 (4): 404 - 443" title="Diatomeen tropischer Moosrasen." volume="42" year="1948">Krasske 1948</bibRefCitation>
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).
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</paragraph>
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<paragraph id="BFEAB4699530DD03EF2BBADA787336DC" pageId="0" pageNumber="113">
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<taxonomicName id="B32817C6B5687AF96B9D29837EAE4788" class="Bacillariophyceae" family="Orthoseiraceae" genus="Orthoseira" higherTaxonomySource="treatment-meta" kingdom="Animalia" lsidName="Orthoseira roeseana subsp. var. var. tropica" order="Melosirales" pageId="0" pageNumber="113" phylum="Bacillariophyta" rank="variety" species="roeseana" subSpecies="var." variety="tropica">Orthoseira roeseana var. tropica</taxonomicName>
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(Krasske) Lange-Bert. & Willmann in
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<bibRefCitation id="5BBC67580E9512607ED059378F24E74B" author="Lange-Bertalot, H" journalOrPublisher="Iconographia Diatomologica" pageId="0" pageNumber="113" pagination="1 - 358" refId="B16" refString="Lange-Bertalot, H, Kuelbs, K, Lauser, T, Noerpel-Schempp, M, Willmann, M, 1996. Dokumentation und Revision der von George Krasske beschriebenen Diatomeen-Taxa. Iconographia Diatomologica 3: 1 - 358" title="Dokumentation und Revision der von George Krasske beschriebenen Diatomeen-Taxa." volume="3" year="1996">Lange-Bertalot et al. (1996)</bibRefCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="4C94BAB71DF27FBC044E28A7398CAAF2" pageId="0" pageNumber="113" type="materials_examined">
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<paragraph id="659A4BB199749FF0323AA30C120E86C8" pageId="0" pageNumber="113">Material used.</paragraph>
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<paragraph id="4832F0D5E18571CD45C53DA53521AAF3" pageId="0" pageNumber="113">
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Sample 156 (Boisa Island,
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<collectingCountry id="0DDD8E14796A1DC2B1176899F0EB67E8" name="Papua New Guinea">Papua New Guinea</collectingCountry>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="0A6D73746772EA51C942FF5B5ED2EC64" pageId="0" pageNumber="113" type="description">
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<paragraph id="6BCC4EFF7BF49B51B501AD4010E1A49C" pageId="0" pageNumber="113">LM description.</paragraph>
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<paragraph id="7C9152B67530967ADFE80DC1839B1390" pageId="0" pageNumber="113">
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Frustules short, cylindrical in girdle view, connected to each other with spines forming short chains (Fig.
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<figureCitation id="E16FD37DDA920BC66D66BB8C4C8152EA" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2F</figureCitation>
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). Valves disc-shaped. Valve dimensions (n = 15): diameter 9.5-39.0
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<normalizedToken id="C1D5F4D8BB1512DAEDAC08D13C81930F" originalValue="μm">μm</normalizedToken>
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, mantle height 5-14
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<normalizedToken id="7FDB2191AAFE78817E438369B5BD0CA9" originalValue="µm">µm</normalizedToken>
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. Valve surface flat, sloping abruptly at the valve face/mantle junction, visible in LM as a darker circular edge. Spiraling to straight thick, siliceous ridges extending from the valve edge to almost 2/3 onto the valve face, leaving only a small central area. Central area small, maximum 1/4 to 1/5 of the total valve diameter, irregular in shape, hyaline in the middle, surrounded by short series of scattered areolae. Three large, rounded carinoportulae present, number constant irrespective of the valve diameter. Striae on the mantle short, uniseriate, composed of rather large areola, located between the ridges, 16-18 in 10
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<normalizedToken id="5022CB9928C2273C80DFB81A5C1B47AD" originalValue="μm">μm</normalizedToken>
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. Valve face areolae rather small, arranged in irregular uniseriate striae, ca 22 in 10
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<normalizedToken id="DCD640B8FEFA396F272C1034CD1C2DE0" originalValue="µm">µm</normalizedToken>
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. Caverns, internal undulations or internal valves not observed. Copulae number variable. Figure
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<figureCitation id="7EBB43F8E82624CE5B576D4B3CF7D02F" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2A-F</figureCitation>
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.
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</paragraph>
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<caption id="1DB89A22C6D505AD0CE4EB6DBA0C7F46" doi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113" start="Figure 2" startId="F2">
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<paragraph id="DF73F9268672A8942FF24BAB3A9EB18C" pageId="0" pageNumber="113">
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<emphasis id="6B8E39DA0FF97AEC1A22C55B13F4EA0F" bold="true" pageId="0" pageNumber="113">Figure 2.</emphasis>
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<taxonomicName id="362D64C7BCDF8117266FC690804116A4" class="Bacillariophyceae" family="Orthoseiraceae" genus="Orthoseira" kingdom="Animalia" lsidName="Orthoseira tropica" order="Orthoseirales" pageId="0" pageNumber="113" phylum="Bacillariophyta" rank="species" species="tropica">
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<emphasis id="9C0761BD68EF38EA501F9272240E8CD4" italics="true" pageId="0" pageNumber="113">Orthoseira tropica</emphasis>
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</taxonomicName>
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(Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea).
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<emphasis id="574471D9FCE33421E701AFF6B0D47D59" bold="true" pageId="0" pageNumber="113">A</emphasis>
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-
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<emphasis id="94C9383E6F8BB2E90E1E2C133130983F" bold="true" pageId="0" pageNumber="113">E</emphasis>
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. LM pictures of valves in valve face view.
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<emphasis id="2B6B8870D8F2D0B132A91AA85BE8F3CE" bold="true" pageId="0" pageNumber="113">F</emphasis>
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. Frustule in girdle view connected to each other with spines forming short chains.
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<emphasis id="6E29FA7C6FD983967DCFB5E5946CF0F5" bold="true" pageId="0" pageNumber="113">G</emphasis>
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-
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<emphasis id="914909F604DB03F969AFE02D39D15F66" bold="true" pageId="0" pageNumber="113">I</emphasis>
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. Frustule in girdle view showing the structure of the cingulum and linking spines.
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<emphasis id="C1DD613385CA9C730C3C198DE18B3230" bold="true" pageId="0" pageNumber="113">J</emphasis>
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. SEM external view of a valve in oblique view showing valve face structure.
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<emphasis id="637D41F8C51A363AFF955900738518A2" bold="true" pageId="0" pageNumber="113">K</emphasis>
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. SEM external detail of central part of the valve face with carinoportulae.
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<emphasis id="71F8FD7727C60527A944C67E469E2EA0" bold="true" pageId="0" pageNumber="113">L</emphasis>
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. Internal view of a complete valve.
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<emphasis id="263015A3FF5E38A997223F0D73E05E06" bold="true" pageId="0" pageNumber="113">M</emphasis>
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. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10
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<normalizedToken id="022A14BDE890A97C9D039FC72A2EAFF3" originalValue="µm">µm</normalizedToken>
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; K, M = 2
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<normalizedToken id="EB4326A71BFF9F6680F1AB6948B8E3A8" originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="06611231A122215C05CEC03D55EEF8CA" pageId="0" pageNumber="113" type="description">
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<paragraph id="7B804BDCBE59CD1F6A0854C1917B89E8" pageId="0" pageNumber="113">SEM description.</paragraph>
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<paragraph id="DE83F0B71D4CB5C0034FE01E12D4D951" pageId="0" pageNumber="113">
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Cingulum composed of several broad, open copulae. One complete and one incomplete rows of small poroids present on the copulae (Fig.
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<figureCitation id="B1AE4CA2958CC0B41393339E23BDA56B" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2 G-I</figureCitation>
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). All copulae open bearing a long ligula and fimbriate edge (Fig.
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<figureCitation id="6344F1321D73786E54E52AF51C3FA2DC" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2G-I</figureCitation>
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). Mantle rarely shallow (Fig.
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<figureCitation id="882AB0A8CA031A39AB6C2B56381AE99D" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2J</figureCitation>
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), usually deep (Fig.
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<figureCitation id="F6607FB8DD98CDBDDF0943D7C9F414A7" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2H</figureCitation>
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), occasionally with a clear step halfway the valve mantle (Fig.
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<figureCitation id="886E3A3F65061D925D775A6B5C8DFFB0" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2H</figureCitation>
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). Advalvar mantle edge with several irregular series of small areolae (Fig.
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<figureCitation id="9C0BF7386E209272A2D144D4517A3CB6" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2G, J</figureCitation>
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). Abvalvar edge broad, hyaline. Marginal pore fields absent. Platelike ridges extending from the valve face onto the advalvar edge of the mantle. Areolae visible between the ridges (Fig.
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<figureCitation id="8FB1107B95C02503EBBF694A343E1167" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2G, H</figureCitation>
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). Valve face flat in the central part surrounded by a ring of spiralling to straight, platelike linking structures, radially arranged on the valve face/mantle junction (Fig.
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<figureCitation id="9BE9432286CE144F41C886BE47BF0AA5" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2J</figureCitation>
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). Between the plates, up to three series of areolae present. Central area hyaline surrounded by scattered areolae. Three carinoportulae visible, each surrounded by a low, cylindrical collar (Fig.
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<figureCitation id="666A55A006D8914CC77890F7CB66FA98" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2J-K</figureCitation>
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). Areolae covered in the valve interior by individual hymenate vela (Fig.
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<figureCitation id="966780D9583B9A15675C20F11474842A" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2L, M</figureCitation>
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). Carinoportulae pit-like, visible as large, rounded depressions, filled with siliceous plug (Fig.
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<figureCitation id="82AA71D50CFC51BEAE13D634DF5B2CD9" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2M</figureCitation>
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). Between the carinoportulae, three long slits present (Fig.
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<figureCitation id="CB5119DFE0B91BDBA4DC2A1B2C164C2E" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2M</figureCitation>
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), arranged in a star-shaped manner. Internal caverns not observed. Figure
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<figureCitation id="5247AB17D365C522F76DA22E8FDC1652" captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Orthoseira tropica (Krasske) Metzeltin & Lange-Bert. LM (A-E) and SEM (F-M) micrographs taken from sample 156 (Boisa Island, Papua New Guinea). A - E. LM pictures of valves in valve face view. F. Frustule in girdle view connected to each other with spines forming short chains. G - I. Frustule in girdle view showing the structure of the cingulum and linking spines. J. SEM external view of a valve in oblique view showing valve face structure. K. SEM external detail of central part of the valve face with carinoportulae. L. Internal view of a complete valve. M. SEM internal detail of the carinoportulae showing the slits between the carinoportulae, arranged in a star-shaped manner. Scale bars: A-J, L = 10 µm; K, M = 2 µm." figureDoi="10.5091/plecevo.115801.figure2" httpUri="https://binary.pensoft.net/fig/998829" pageId="0" pageNumber="113">2G-M</figureCitation>
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.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |