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<document id="9F0B5FCB5C3FDB826FBA45F9206C7E57" ID-CLB-Dataset="299054" ID-DOI="10.5281/zenodo.12117576" ID-GBIF-Dataset="9ec266f5-1dc7-4272-9fbc-67c7f2b0f5aa" ID-ISSN="0026-279X" ID-Zenodo-Dep="12117576" IM.bibliography_approvedBy="valdenar" IM.illustrations_approvedBy="valdenar" IM.materialsCitations_approvedBy="valdenar" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="valdenar" checkinTime="1718741462746" checkinUser="felipe" docAuthor="Lobban, Christopher S." docDate="2015" docId="03826143FF968174FF34FE071591FB10" docLanguage="en" docName="Micronesica.2015.02.1-49.pdf" docOrigin="Micronesica 2015 (2)" docStyle="DocumentStyle:73477DD41873F4E732E2765E250AF97D.1:Micronesica.2013-.journal_article.type1" docStyleId="73477DD41873F4E732E2765E250AF97D" docStyleName="Micronesica.2013-.journal_article.type1" docStyleVersion="1" docTitle="Rhoiconeis pagoensis Lobban 2015, n. sp." docType="treatment" docVersion="5" lastPageNumber="14" masterDocId="FFBB193BFF9B8179FFDCFF9E1460FD3F" masterDocTitle="Benthic marine diatom flora of Guam: new records, redescription of Psammodictyon pustulatum n. comb., n. stat., and three new species (Colliculoamphora gabgabensis, Lauderia excentrica, and Rhoiconeis pagoensis)" masterLastPageNumber="49" masterPageNumber="1" pageNumber="14" updateTime="1719541204275" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-NC-ND-4.0">
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<mods:title id="623C47743BA86ABD0E4E7DFBFF06B2C5">Benthic marine diatom flora of Guam: new records, redescription of Psammodictyon pustulatum n. comb., n. stat., and three new species (Colliculoamphora gabgabensis, Lauderia excentrica, and Rhoiconeis pagoensis)</mods:title>
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<mods:name id="EE4FD571CE92EF99AC719378F838797E" type="personal">
<mods:role id="4C0ECF021CF60F43BA3D2DE968078A12">
<mods:roleTerm id="4AF081941A8E560FDA4C88D7FD6D7129">Author</mods:roleTerm>
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<mods:namePart id="EDC92A3D592F4990086C76A052B2AD63">Lobban, Christopher S.</mods:namePart>
<mods:affiliation id="4B5C1E53FEF064C9AE61BBEF30C609FD">Division of Natural Sciences, University of Guam, Mangilao, GU 83823, USA e-mail: clobban @ guam. net</mods:affiliation>
<mods:nameIdentifier id="7CCA446A3D72371E1911F5E987FA5B09" type="email">clobban@guam.net</mods:nameIdentifier>
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<mods:typeOfResource id="3E8D82BE24BD14805ADEC5B5ED92286A">text</mods:typeOfResource>
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<mods:title id="DB3C3CDB47BCF444FBB185CBF645CAE3">Micronesica</mods:title>
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<mods:part id="0769793E4359B1E418EF40A2ED8C9FAA">
<mods:date id="D6397A9A90248CEC0FB9EBD56951A042">2015</mods:date>
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<mods:number id="8ABC71F178DDC23C53FCD65B2BEA657D">2015</mods:number>
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<mods:identifier id="A17F04292D955B39D6010367348634C6" type="DOI">10.5281/zenodo.12117576</mods:identifier>
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<treatment id="03826143FF968174FF34FE071591FB10" ID-DOI="http://doi.org/10.5281/zenodo.12576027" ID-GBIF-Taxon="233814385" ID-Zenodo-Dep="12576027" LSID="urn:lsid:plazi:treatment:03826143FF968174FF34FE071591FB10" httpUri="http://treatment.plazi.org/id/03826143FF968174FF34FE071591FB10" lastPageNumber="14" pageId="13" pageNumber="14">
<subSubSection id="C33183DEFF968174FF34FE071114FC8D" box="[232,1396,409,434]" pageId="13" pageNumber="14" type="nomenclature">
<paragraph id="8B94D055FF968174FF34FE071114FC8D" blockId="13.[232,1403,409,1583]" box="[232,1396,409,434]" pageId="13" pageNumber="14">
<heading id="D0DC6739FF968174FF34FE071114FC8D" box="[232,1396,409,434]" centered="true" fontSize="11" level="2" pageId="13" pageNumber="14" reason="2">
<emphasis id="B95F0C47FF968174FF34FE0716C8FC8D" bold="true" box="[232,680,409,434]" pageId="13" pageNumber="14">
<taxonomicName id="4C2BABD6FF968174FF34FE07163EFC8D" authority="Lobban" authorityName="Lobban" authorityYear="2015" box="[232,606,409,434]" class="Bacillariophyceae" family="Naviculaceae" genus="Rhoiconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="pagoensis" status="sp. nov.">
<emphasis id="B95F0C47FF968174FF34FE07158EFC8D" bold="true" box="[232,494,409,434]" italics="true" pageId="13" pageNumber="14">Rhoiconeis pagoensis</emphasis>
Lobban
</taxonomicName>
<taxonomicNameLabel id="A26CB13CFF968174FDB9FE0716C8FC8D" box="[613,680,409,434]" pageId="13" pageNumber="14" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
<figureCitation id="1310CCD0FF968174FB0FFE071114FC8D" box="[1235,1396,409,434]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Figs 131–138</figureCitation>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C33183DEFF968174FF34FE24179FFF04" pageId="13" pageNumber="14" type="description">
<paragraph id="8B94D055FF968174FF34FE241742FCEC" blockId="13.[232,1403,409,1583]" box="[232,802,442,467]" pageId="13" pageNumber="14">
<taxonomicName id="4C2BABD6FF968174FF34FE241674FCEC" authority="Bessey" authorityName="Bessey" box="[232,532,442,467]" class="Bacillariophyceae" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="order">NAVICULALES Bessey</taxonomicName>
:
<taxonomicName id="4C2BABD6FF968174FDC3FE241742FCEC" authority="Kutzing" authorityName="Kutzing" box="[543,802,442,467]" class="Bacillariophyceae" family="Naviculaceae" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="family">Naviculaceae Kützing</taxonomicName>
</paragraph>
<paragraph id="8B94D055FF968174FF34FE421656FCCA" blockId="13.[232,1403,409,1583]" box="[232,566,476,501]" pageId="13" pageNumber="14">Samples: GU7X-2, GU7X-7</paragraph>
<paragraph id="8B94D055FF968174FF34FD9E1027FF26" blockId="13.[232,1403,409,1583]" box="[232,1095,512,538]" pageId="13" pageNumber="14">
Dimensions: Length 16–49 µm, width 6.7–7.9 µm; striae
<quantity id="4CD37DB0FF968174FC51FD9E1794FF26" box="[909,1012,512,537]" metricMagnitude="-1" metricUnit="m" metricValue="4.826" metricValueMax="5.588" metricValueMin="4.064" pageId="13" pageNumber="14" unit="in" value="19.0" valueMax="22.0" valueMin="16.0">16–22 in</quantity>
10 µm
</paragraph>
<paragraph id="8B94D055FF968174FF34FDBC179FFF04" blockId="13.[232,1403,409,1583]" box="[232,1023,546,571]" pageId="13" pageNumber="14">Diagnosis: Differing from the other two species in the stria density.</paragraph>
</subSubSection>
<subSubSection id="C33183DEFF968174FF34FDDD115CF983" pageId="13" pageNumber="14" type="materials_examined">
<paragraph id="8B94D055FF968174FF34FDDD16F1FF41" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
<materialsCitation id="3B43DA08FF968174FF34FDDD16F1FF41" ID-GBIF-Occurrence="4899899303" county="Slide" location="Academy of Sciences" municipality="Deposited" pageId="13" pageNumber="14" specimenCount="1" stateProvince="California" typeStatus="holotype">
<typeStatus id="54906EF7FF968174FF34FDDD1539FF63" box="[232,345,579,604]" pageId="13" pageNumber="14" type="holotype">Holotype</typeStatus>
:
<collectingCounty id="62F5A8D9FF968174FEB5FDDD15C5FF63" box="[361,421,579,604]" pageId="13" pageNumber="14">Slide</collectingCounty>
# 1319 from GU7X-7,
<figureCitation id="1310CCD0FF968174FD13FDDD1758FF63" box="[719,824,579,604]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Fig. 133</figureCitation>
.
<collectingMunicipality id="6BF04A2FFF968174FC94FDDD17DFFF63" box="[840,959,579,604]" pageId="13" pageNumber="14">Deposited</collectingMunicipality>
at
<collectingRegion id="49EF1EB7FF968174FC37FDDD1002FF63" box="[1003,1122,579,604]" country="United States of America" name="California" pageId="13" pageNumber="14">California</collectingRegion>
<location id="8EF4868EFF968174FBB1FDDD1116FF63" LSID="urn:lsid:plazi:treatment:03826143FF968174FF34FE071591FB10:8EF4868EFF968174FBB1FDDD1116FF63" box="[1133,1398,579,604]" county="Slide" municipality="Deposited" name="Academy of Sciences" pageId="13" pageNumber="14" stateProvince="California">Academy of Sciences</location>
, accession # 627426 slide # 220342.
</materialsCitation>
</paragraph>
<paragraph id="8B94D055FF968174FF34FD1910C2FFFD" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
<materialsCitation id="3B43DA08FF968174FF34FD1910FEFFFD" ID-GBIF-Occurrence="4899899304" collectingDate="2013-06-03" country="Guam" latitude="13.427778" location="Pago Bay" longLatPrecision="21" longitude="144.79918" pageId="13" pageNumber="14" specimenCount="1">
Type locality:
<location id="8EF4868EFF968174FE43FD191678FF9F" LSID="urn:lsid:plazi:treatment:03826143FF968174FF34FE071591FB10:8EF4868EFF968174FE43FD191678FF9F" box="[415,536,647,672]" country="Guam" latitude="13.427778" longLatPrecision="21" longitude="144.79918" name="Pago Bay" pageId="13" pageNumber="14">Pago Bay</location>
,
<collectingCountry id="F33C90C5FF968174FDF6FD191614FF9F" box="[554,628,647,672]" name="Guam" pageId="13" pageNumber="14">Guam</collectingCountry>
,
<geoCoordinate id="EE1FB692FF968174FD5AFD191740FF9F" box="[646,800,647,672]" degrees="13" direction="north" minutes="25" orientation="latitude" pageId="13" pageNumber="14" precision="15" seconds="40" value="13.427778">13°25'40&quot; N</geoCoordinate>
,
<geoCoordinate id="EE1FB692FF968174FCEEFD1917B7FF9F" box="[818,983,647,672]" degrees="144" direction="east" minutes="47" orientation="longitude" pageId="13" pageNumber="14" precision="15" seconds="57" value="144.79918">144°47'57&quot; E</geoCoordinate>
, on shore in
<collectorName id="26DEB583FF968174FB59FD191161FF9F" box="[1157,1281,647,672]" pageId="13" pageNumber="14">University</collectorName>
of Guam
<collectorName id="26DEB583FF968174FF34FD3715A6FFFD" box="[232,454,681,706]" pageId="13" pageNumber="14">Marine Laboratory</collectorName>
seawater outfall stream, collected by
<collectorName id="26DEB583FF968174FC5EFD371060FFFD" box="[898,1024,681,706]" pageId="13" pageNumber="14">C. Lobban</collectorName>
,
<date id="FF95F695FF968174FBD1FD3710FEFFFD" box="[1037,1182,681,706]" pageId="13" pageNumber="14" value="2013-06-03">
<collectingDate id="EFD10F7DFF968174FBD1FD3710FEFFFD" box="[1037,1182,681,706]" pageId="13" pageNumber="14" value="2013-06-03">3 June 2013</collectingDate>
</date>
</materialsCitation>
.
</paragraph>
<paragraph id="8B94D055FF968174FF34FD541050FFDC" blockId="13.[232,1403,409,1583]" box="[232,1072,714,739]" pageId="13" pageNumber="14">
<typeStatus id="54906EF7FF968174FF34FD54153EFFDC" box="[232,350,714,739]" pageId="13" pageNumber="14" type="paratype">Paratypes</typeStatus>
: Slides #1265, 1266,
<quantity id="4CD37DB0FF968174FD86FD54169CFFDC" box="[602,764,714,739]" metricMagnitude="1" metricUnit="m" metricValue="3.22834" metricValueMax="3.23088" metricValueMin="3.2258" pageId="13" pageNumber="14" unit="in" value="1271.0" valueMax="1272.0" valueMin="1270.0">1270–1272 in</quantity>
UOG Diatom Herbarium.
</paragraph>
<paragraph id="8B94D055FF968174FF34FD7210C8FE18" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
Etymology: named for the
<typeStatus id="54906EF7FF968174FDF5FD72163BFE3A" box="[553,603,748,773]" pageId="13" pageNumber="14">type</typeStatus>
locality, Pago Bay, itself probably from
<emphasis id="B95F0C47FF968174FB99FD72101FFE3A" box="[1093,1151,748,773]" italics="true" pageId="13" pageNumber="14">pagu</emphasis>
, the Chamorro name for the tree
<taxonomicName id="4C2BABD6FF968174FEACFC901621FE18" box="[368,577,782,807]" class="Magnoliopsida" family="Malvaceae" genus="Hibiscus" kingdom="Plantae" order="Malvales" pageId="13" pageNumber="14" phylum="Tracheophyta" rank="species" species="tiliaceus">
<emphasis id="B95F0C47FF968174FEACFC901621FE18" box="[368,577,782,807]" italics="true" pageId="13" pageNumber="14">Hibiscus tiliaceus</emphasis>
</taxonomicName>
L., whose bark was traditionally used to make rope.
</paragraph>
<paragraph id="8B94D055FF968174FF34FCB1111BFE91" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
Description: Live cells motile, two plastids lying along the girdle faces as in
<taxonomicName id="4C2BABD6FF968174FB4DFCB1109BFE77" box="[1169,1275,815,840]" class="Bacillariophyceae" family="Naviculaceae" genus="Navicula" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FB4DFCB1109BFE77" box="[1169,1275,815,840]" italics="true" pageId="13" pageNumber="14">Navicula</emphasis>
</taxonomicName>
(
<figureCitation id="1310CCD0FF968174FAD2FCB11578FE55" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Fig. 131, 132</figureCitation>
). Frustules flexed in girdle view, the central areas of the two usually different, with the broader area on the concave side (
<figureCitation id="1310CCD0FF968174FDC7FCED16A3FEB3" box="[539,707,883,908]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Figs 136, 137</figureCitation>
). Striae lineate, radiate except for short ones bordering the central area (
<figureCitation id="1310CCD0FF968174FE5EFC0B164BFE91" box="[386,555,917,942]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Figs 135, 137</figureCitation>
). Valvocopula in two segments, with a sigmoid junction near one apex
</paragraph>
<paragraph id="8B94D055FF968174FF34FC281765F90B" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
(
<figureCitation id="1310CCD0FF968174FF2DFC28153BFEF0" box="[241,347,950,975]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Fig. 138</figureCitation>
); the smaller segment reminiscent of the end plate in
<taxonomicName id="4C2BABD6FF968174FC32FC281508FECE" authority="(Pocock &amp; Cox 1982)" baseAuthorityName="Pocock &amp; Cox" baseAuthorityYear="1982" class="Bacillariophyceae" family="Rhabdonemataceae" genus="Rhabdonema" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Rhabdonematales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="species" species="arcuata">
<emphasis id="B95F0C47FF968174FC32FC28108FFEF0" box="[1006,1263,950,975]" italics="true" pageId="13" pageNumber="14">Rhabdonema arcuata</emphasis>
(
<bibRefCitation id="EFBAADA4FF968174FADDFC28153FFECE" author="Pocock, K. L. &amp; E. J. Cox" pageId="13" pageNumber="14" pagination="621 - 641" refId="ref16980" refString="Pocock, K. L. &amp; E. J. Cox. 1982. Frustule structure in the diatom Rhabdonema arcuatum (Lyngb.) Kutz. with particular reference to the cingulum as seen with the scanning electron microscope. Nova Hedwigia 36: 621 - 641." type="journal article" year="1982">Pocock &amp; Cox 1982</bibRefCitation>
)
</taxonomicName>
. There were slight differences in stria count common between apices and center, the two apices and the two valves. Frustules did not come apart even after double acid cleaning and I was not able to get
<collectionCode id="ED3A4890FF968174FE4AFB8515B2F90B" box="[406,466,1051,1076]" pageId="13" pageNumber="14">SEM</collectionCode>
of the internal valve face.
</paragraph>
<paragraph id="8B94D055FF968174FF34FBA3115CF983" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
Comments: Samples were collected over several days from a diatom bloom in an outfall stream from the U.
<collectingCountry id="F33C90C5FF968174FE50FBC115B4F947" box="[396,468,1119,1144]" name="Guam" pageId="13" pageNumber="14">Guam</collectingCountry>
Marine Laboratory seawater system. The bloom developed soon after the seawater flow was restarted, epiphytic on a population of the siphonous green alga
<taxonomicName id="4C2BABD6FF968174FB62FB1F1115F9A5" box="[1214,1397,1153,1178]" class="Ulvophyceae" family="Bryopsidaceae" genus="Trichosolen" kingdom="Plantae" order="Bryopsidales" pageId="13" pageNumber="14" phylum="Chlorophyta" rank="species" species="undetermined">
<emphasis id="B95F0C47FF968174FB62FB1F112AF9A5" box="[1214,1354,1153,1178]" italics="true" pageId="13" pageNumber="14">Trichosolen</emphasis>
sp.
</taxonomicName>
, itself known to be rare except for blooming after a major disturbance (
<bibRefCitation id="EFBAADA4FF968174FBFCFB3D114FF983" author="Lobban, C. S. &amp; R. T. Tsuda" box="[1056,1327,1187,1212]" pageId="13" pageNumber="14" pagination="54 - 99" refId="ref16029" refString="Lobban, C. S. &amp; R. T. Tsuda. 2003. Revised checklist of benthic marine macroalgae and seagrasses of Guam and Micronesia. Micronesica 35 - 36: 54 - 99." type="book chapter" year="2003">Lobban &amp; Tsuda 2003</bibRefCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C33183DEFF968174FE94FB5A1591FB10" pageId="13" pageNumber="14" type="reference_group">
<paragraph id="8B94D055FF968174FE94FB5A1591FB10" blockId="13.[232,1403,409,1583]" pageId="13" pageNumber="14">
<taxonomicName id="4C2BABD6FF968174FE94FB5A1654F9E2" authority="Grunow" authorityName="Grunow" box="[328,564,1220,1245]" class="Bacillariophyceae" family="Naviculaceae" genus="Rhoiconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FE94FB5A15AAF9E2" box="[328,458,1220,1245]" italics="true" pageId="13" pageNumber="14">Rhoiconeis</emphasis>
Grunow
</taxonomicName>
was resurrected by
<bibRefCitation id="EFBAADA4FF968174FCF4FB5A17B5F9E2" author="Medlin, L. K." box="[808,981,1220,1245]" pageId="13" pageNumber="14" pagination="313 - 328" refId="ref16381" refString="Medlin, L. K. 1985. A reappraisal of the diatom genus Rhoiconeis and the description of Campylopyxis, gen. nov. British Phycological Journal 20: 313 - 328." type="journal article" year="1985">Medlin (1985)</bibRefCitation>
and currently includes two species (
<tableCitation id="C6A9E5EEFF968174FF2CFB78152FF9C0" box="[240,335,1254,1279]" captionStart="Table 1" captionStartId="14.[232,292,239,262]" captionTargetPageId="14" captionText="Table 1. Comparison of Rhoiconeis species." httpUri="http://table.plazi.org/id/DF5480DDFF958177FF34FF7116DDFC39" pageId="13" pageNumber="14" tableUuid="DF5480DDFF958177FF34FF7116DDFC39">Table 1</tableCitation>
). The genus is characterized by naviculoid frustules flexed in girdle view and having lineate striae and internal siliceous sheets joining the outer parts of the interstriae. There is a distinctive pattern in the girdle bands, with a segmented valvocopula and two pleural bands, as shown in
<bibRefCitation id="EFBAADA4FF968174FE80FAD21660F85A" author="Medlin, L. K." box="[348,512,1356,1381]" pageId="13" pageNumber="14" pagination="313 - 328" refId="ref16381" refString="Medlin, L. K. 1985. A reappraisal of the diatom genus Rhoiconeis and the description of Campylopyxis, gen. nov. British Phycological Journal 20: 313 - 328." type="journal article" year="1985">Medlin (1985</bibRefCitation>
, fig. 38; compare with my
<figureCitation id="1310CCD0FF968174FC98FAD217CBF85A" box="[836,939,1356,1381]" captionStart="Figures 127–138" captionStartId="45.[292,372,821,844]" captionTargetId="figure-14@46.[232,1402,232,1852]" captionTargetPageId="46" captionText="Figures 127–138. Figs 125–126. Psammodictyon pustulatum (GU66A-3) (SEM). Fig. 127. Oblique view of frustule showing linear pores on the dorsal valve face (arrow). In both Figs 127 and 128 the transition from the ventral to dorsal parts of the valvocopula is visible (arrowheads). Fig. 128. Apical view of frustule showing the distinctive topography of the ventral side of the raphe-keel, along with the linear pores on the dorsal side of the other valve (arrow) (two stacked images). Figs 129, 130. Pteroncola inane (SEM). Fig. 129. Frustule in girdle view (GU41D-1A). Fig. 130. Broken frustule showing internal and external valve faces, with the single row of internal pores (arrows) (Jordan collection, image by Misaki Ishizawa) (SEM). Figs. 131–138. Rhoiconeis pagoensis. Figs 131, 132. Same live cell in valve and girdle view showing plastids (GU7X-8) (DIC). Figs 133, 134. Holotype (valve view) and a girdle view from the same slide (GU7X-7) (DIC). Fig. 135. Frustule in valve view (GU7X-7) (SEM). Fig. 136. Frustule in girdle view; note the very short striae at the central area on the concave valve (GU7X-2) (SEM). Fig. 137. Detail of a pair of frustules showing difference in striae lengths at central area on convex and concave valves (GU7X-2) (SEM). Fig. 138. Apex of a frustule in girdle view showing the segmented valvocopula (S1 and S2) and two pleural bands (P1 and P2) (GU7X-5) (SEM). Scale bars: Fig. 136 = 10 µm, Figs 127–128, 131–135 = 5 µm, Figs 129, 130, 137, 138 = 2 µm." figureDoi="http://doi.org/10.5281/zenodo.12575981" httpUri="https://zenodo.org/record/12575981/files/figure.png" pageId="13" pageNumber="14">Fig. 138</figureCitation>
). In
<taxonomicName id="4C2BABD6FF968174FC3EFAD21004F85A" box="[994,1124,1356,1381]" class="Bacillariophyceae" family="Naviculaceae" genus="Rhoiconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FC3EFAD21004F85A" box="[994,1124,1356,1381]" italics="true" pageId="13" pageNumber="14">Rhoiconeis</emphasis>
</taxonomicName>
both valves are raphid, in contrast to
<taxonomicName id="4C2BABD6FF968174FE77FAF31654F8B9" ID-CoL="C8ZF4" authorityName="Bory" authorityYear="1822" box="[427,564,1389,1414]" class="Bacillariophyceae" family="Achnanthaceae" genus="Achnanthes" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Achnanthales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FE77FAF31654F8B9" box="[427,564,1389,1414]" italics="true" pageId="13" pageNumber="14">Achnanthes</emphasis>
</taxonomicName>
; isopolar, in contrast to
<taxonomicName id="4C2BABD6FF968174FC50FAF3105AF8B9" ID-CoL="CBZTM" authorityName="A.Grunow" authorityYear="1860" box="[908,1082,1389,1414]" class="Bacillariophyceae" family="Rhoicospheniaceae" genus="Rhoicosphenia" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Cymbellales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FC50FAF3105AF8B9" box="[908,1082,1389,1414]" italics="true" pageId="13" pageNumber="14">Rhoicosphenia</emphasis>
</taxonomicName>
; and distinguished from
<taxonomicName id="4C2BABD6FF968174FF34FA1115EEF897" ID-CoL="C94VG" authorityName="L.K.Medlin" authorityYear="1985" box="[232,398,1423,1448]" class="Bacillariophyceae" family="Rhoicospheniaceae" genus="Campylopyxis" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Cymbellales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FF34FA1115EEF897" box="[232,398,1423,1448]" italics="true" pageId="13" pageNumber="14">Campylopyxis</emphasis>
</taxonomicName>
by the pores, girdle bands, and internal valve features. Both known species of
<taxonomicName id="4C2BABD6FF968174FF34FA2F150AF8F5" box="[232,362,1457,1482]" class="Bacillariophyceae" family="Naviculaceae" genus="Rhoiconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FF34FA2F150AF8F5" box="[232,362,1457,1482]" italics="true" pageId="13" pageNumber="14">Rhoiconeis</emphasis>
</taxonomicName>
have radiate, lineate striae and slightly different central areas on the convex and concave valves. Thus, the present material can be positively identified as
<taxonomicName id="4C2BABD6FF968174FB8AFA4C10B8F8D4" box="[1110,1240,1490,1515]" class="Bacillariophyceae" family="Naviculaceae" genus="Rhoiconeis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="13" pageNumber="14" phylum="Ochrophyta" rank="genus">
<emphasis id="B95F0C47FF968174FB8AFA4C10B8F8D4" box="[1110,1240,1490,1515]" italics="true" pageId="13" pageNumber="14">Rhoiconeis</emphasis>
</taxonomicName>
even without good internal views, and can be distinguished from the other species on the basis of valve size and stria density (
<tableCitation id="C6A9E5EEFF968174FE5AF9881580FB10" box="[390,480,1558,1583]" captionStart="Table 1" captionStartId="14.[232,292,239,262]" captionTargetPageId="14" captionText="Table 1. Comparison of Rhoiconeis species." httpUri="http://table.plazi.org/id/DF5480DDFF958177FF34FF7116DDFC39" pageId="13" pageNumber="14" tableUuid="DF5480DDFF958177FF34FF7116DDFC39">Table 1</tableCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>
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