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<document ID-DOI="10.11646/phytotaxa.593.1.1" ID-GBIF-Dataset="ef558f00-24a4-4671-bf56-df3c1d61ecd1" ID-ISSN="1179-3163" ID-Zenodo-Dep="7875089" IM.bibliography_approvedBy="tatiana" IM.illustrations_approvedBy="tatiana" IM.materialsCitations_approvedBy="tatiana" IM.metadata_approvedBy="tatiana" IM.tables_approvedBy="tatiana" IM.taxonomicNames_approvedBy="tatiana" IM.treatments_approvedBy="tatiana" checkinTime="1682061103176" checkinUser="plazi" docAuthor="Jovanovska, Elena, Wilson, Mallory C., Hamilton, Paul B. &amp; Stone, Jeffery" docDate="2023" docId="038487E2FFFE2662BCF1FF09BC2A75D4" docLanguage="en" docName="phytotaxa.593.1.1.pdf" docOrigin="Phytotaxa 593 (1)" docSource="http://dx.doi.org/10.11646/phytotaxa.593.1.1" docStyle="DocumentStyle:F08184CE06D8A97EA3E6DE35D99648B0.2:Phytotaxa.2014-.monograph" docStyleId="F08184CE06D8A97EA3E6DE35D99648B0" docStyleName="Phytotaxa.2014-.monograph" docStyleVersion="2" docTitle="Diploneis tessellata Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone 2023, sp. nov." docType="treatment" docVersion="4" lastPageNumber="33" masterDocId="FFBDFF9AFFDE2642BC79FF97B8647004" masterDocTitle="Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas" masterLastPageNumber="102" masterPageNumber="1" pageNumber="33" updateTime="1683016984500" updateUser="tatiana">
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<mods:title>Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas</mods:title>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Jovanovska, Elena</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0002-3413-3683</mods:nameIdentifier>
<mods:affiliation>Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany &amp; jovanovska. eci @ gmail. com; https: // orcid. org / 0000 - 0002 - 3413 - 3683</mods:affiliation>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Wilson, Mallory C.</mods:namePart>
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<mods:affiliation>Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany &amp; Indiana State University, Indiana State University, Terre Haute, IN, USA &amp; mwilson 108 @ sycamores. indstate. edu; https: // orcid. org / 0000 - 0002 - 2852 - 125 X</mods:affiliation>
<mods:nameIdentifier type="email">mwilson108@sycamores.indstate.edu</mods:nameIdentifier>
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<mods:namePart>Hamilton, Paul B.</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0001-6938-6341</mods:nameIdentifier>
<mods:affiliation>Phycology Section, Research and Collections Division, Canadian Museum of Nature, Ottawa, Canada &amp; phamilton @ nature. ca; https: // orcid. org / 0000 - 0001 - 6938 - 6341</mods:affiliation>
<mods:nameIdentifier type="email">phamilton@nature.ca</mods:nameIdentifier>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Stone, Jeffery</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0002-1313-0643</mods:nameIdentifier>
<mods:affiliation>Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany &amp; Indiana State University, Indiana State University, Terre Haute, IN, USA &amp; Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany &amp; jeffery. stone @ indstate. edu; https: // orcid. org / 0000 - 0002 - 1313 - 0643 * Corresponding author &amp; Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany</mods:affiliation>
<mods:nameIdentifier type="email">jeffery.stone@indstate.edu</mods:nameIdentifier>
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<mods:title>Phytotaxa</mods:title>
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<mods:date>2023</mods:date>
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<mods:number>2023-04-21</mods:number>
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<mods:number>593</mods:number>
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<mods:identifier type="DOI">10.11646/phytotaxa.593.1.1</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.7875133" ID-Zenodo-Dep="7875133" LSID="urn:lsid:plazi:treatment:038487E2FFFE2662BCF1FF09BC2A75D4" httpUri="http://treatment.plazi.org/id/038487E2FFFE2662BCF1FF09BC2A75D4" lastPageNumber="33" pageId="32" pageNumber="33">
<subSubSection pageId="32" pageNumber="33" type="nomenclature">
<paragraph blockId="32.[136,910,158,185]" box="[136,910,158,185]" pageId="32" pageNumber="33">
<heading box="[136,910,158,185]" fontSize="11" level="2" pageId="32" pageNumber="33" reason="5">
<emphasis box="[136,451,158,185]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[136,360,158,185]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="tessellata" status="sp. nov.">
<emphasis bold="true" box="[136,360,158,185]" italics="true" pageId="32" pageNumber="33">Diploneis tessellata</emphasis>
</taxonomicName>
<taxonomicNameLabel box="[366,451,159,184]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
(LM
<figureCitation box="[516,672,158,184]" captionStart="FIGURES 132141" captionStartId="33.[136,243,1953,1975]" captionTargetBox="[178,1409,190,1929]" captionTargetId="figure-19@33.[178,1409,190,1929]" captionTargetPageId="33" captionText="FIGURES 132141. Diploneis tessellata sp. nov., LM valve views, Lake Tanganyika. 132, 134141. Specimens from Kalambo Falls Lodge. 133. Specimen from Kalya Bay. Fig. 138. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875155" httpUri="https://zenodo.org/record/7875155/files/figure.png" pageId="32" pageNumber="33">Figs 132141</figureCitation>
, SEM
<figureCitation box="[748,902,158,185]" captionStart-0="FIGURES 142147" captionStart-1="FIGURES 148151" captionStartId-0="34.[136,243,1922,1944]" captionStartId-1="35.[136,243,1926,1948]" captionTargetBox-0="[178,1409,193,1895]" captionTargetBox-1="[151,1433,194,1901]" captionTargetId-0="figure-23@34.[177,1410,191,1896]" captionTargetId-1="figure-18@35.[150,1434,193,1902]" captionTargetPageId-0="34" captionTargetPageId-1="35" captionText-0="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." captionText-1="FIGURES 148151. Diploneis tessellata sp. nov., SEM internal valve views, Lake Tanganyika. 148. Specimen from Mutondwe Island. 149. Specimen from Kalambo Falls Lodge. 150. Specimen from Isanga Bay. 151. Specimen from Rukoma area. 148151. View of a whole valve, showing simple and slightly elevated raphe, alveoli covered by a thin silica layer, and closed longitudinal canal. Scale bar = 10 μm." figureDoi-0="http://doi.org/10.5281/zenodo.7875161" figureDoi-1="http://doi.org/10.5281/zenodo.7875165" httpUri-0="https://zenodo.org/record/7875161/files/figure.png" httpUri-1="https://zenodo.org/record/7875165/files/figure.png" pageId="32" pageNumber="33">Figs 142151</figureCitation>
)
</heading>
</paragraph>
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
Valves are weakly asymmetric, broadly elliptic with convex margins and bluntly round ends (
<figureCitation box="[1206,1368,229,256]" captionStart-0="FIGURES 132141" captionStart-1="FIGURES 142147" captionStartId-0="33.[136,243,1953,1975]" captionStartId-1="34.[136,243,1922,1944]" captionTargetBox-0="[178,1409,190,1929]" captionTargetBox-1="[178,1409,193,1895]" captionTargetId-0="figure-19@33.[178,1409,190,1929]" captionTargetId-1="figure-23@34.[177,1410,191,1896]" captionTargetPageId-0="33" captionTargetPageId-1="34" captionText-0="FIGURES 132141. Diploneis tessellata sp. nov., LM valve views, Lake Tanganyika. 132, 134141. Specimens from Kalambo Falls Lodge. 133. Specimen from Kalya Bay. Fig. 138. Holotype specimen. Scale bar = 10 μm." captionText-1="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi-0="http://doi.org/10.5281/zenodo.7875155" figureDoi-1="http://doi.org/10.5281/zenodo.7875161" httpUri-0="https://zenodo.org/record/7875155/files/figure.png" httpUri-1="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Figs 132143</figureCitation>
). Valve length is 29.560.5 μm and valve width is 18.533.5 μm. The axial area is narrow, lanceolate, widening at the center to form an elongate and weakly asymmetric central area (
<figureCitation box="[782,883,300,326]" captionStart="FIGURES 132141" captionStartId="33.[136,243,1953,1975]" captionTargetBox="[178,1409,190,1929]" captionTargetId="figure-19@33.[178,1409,190,1929]" captionTargetPageId="33" captionText="FIGURES 132141. Diploneis tessellata sp. nov., LM valve views, Lake Tanganyika. 132, 134141. Specimens from Kalambo Falls Lodge. 133. Specimen from Kalya Bay. Fig. 138. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875155" httpUri="https://zenodo.org/record/7875155/files/figure.png" pageId="32" pageNumber="33">Figs 133</figureCitation>
,
<figureCitation box="[895,997,300,327]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">145, 146</figureCitation>
), 3.56.5 μm wide. Externally, the canal is linear to lanceolate, slightly expanded in the middle of the valve with three rows of cribrate (&lt;9 poroids) areolae narrowing into one at the valve apices (
<figureCitation box="[586,745,370,396]" captionStart="FIGURES 132141" captionStartId="33.[136,243,1953,1975]" captionTargetBox="[178,1409,190,1929]" captionTargetId="figure-19@33.[178,1409,190,1929]" captionTargetPageId="33" captionText="FIGURES 132141. Diploneis tessellata sp. nov., LM valve views, Lake Tanganyika. 132, 134141. Specimens from Kalambo Falls Lodge. 133. Specimen from Kalya Bay. Fig. 138. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875155" httpUri="https://zenodo.org/record/7875155/files/figure.png" pageId="32" pageNumber="33">Figs 132141</figureCitation>
,
<figureCitation box="[758,861,370,396]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">146, 147</figureCitation>
). Internally, a thick non-porous slightly raised silica plate encloses the longitudinal canal (
<figureCitation box="[566,727,405,432]" captionStart="FIGURES 148151" captionStartId="35.[136,243,1926,1948]" captionTargetBox="[151,1433,194,1901]" captionTargetId="figure-18@35.[150,1434,193,1902]" captionTargetPageId="35" captionText="FIGURES 148151. Diploneis tessellata sp. nov., SEM internal valve views, Lake Tanganyika. 148. Specimen from Mutondwe Island. 149. Specimen from Kalambo Falls Lodge. 150. Specimen from Isanga Bay. 151. Specimen from Rukoma area. 148151. View of a whole valve, showing simple and slightly elevated raphe, alveoli covered by a thin silica layer, and closed longitudinal canal. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875165" httpUri="https://zenodo.org/record/7875165/files/figure.png" pageId="32" pageNumber="33">Figs 148151</figureCitation>
). Externally, the raphe is filiform, curved with simple proximal ends deflected to one side; the proximal raphe ends are positioned within expanded teardrop depressions (
<figureCitation captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Figs 145, 146</figureCitation>
). The distal raphe ends are unilaterally bent to the same side and terminate at the valve face mantle junction (
<figureCitation box="[144,308,511,537]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Figs 142, 144</figureCitation>
). Internally, the raphe is curved with simple proximal and distal ends that are slightly elevated in a depression formed by the longitudinal canal (
<figureCitation box="[659,820,546,573]" captionStart="FIGURES 148151" captionStartId="35.[136,243,1926,1948]" captionTargetBox="[151,1433,194,1901]" captionTargetId="figure-18@35.[150,1434,193,1902]" captionTargetPageId="35" captionText="FIGURES 148151. Diploneis tessellata sp. nov., SEM internal valve views, Lake Tanganyika. 148. Specimen from Mutondwe Island. 149. Specimen from Kalambo Falls Lodge. 150. Specimen from Isanga Bay. 151. Specimen from Rukoma area. 148151. View of a whole valve, showing simple and slightly elevated raphe, alveoli covered by a thin silica layer, and closed longitudinal canal. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875165" httpUri="https://zenodo.org/record/7875165/files/figure.png" pageId="32" pageNumber="33">Figs 148151</figureCitation>
). The striae are parallel at mid-valve becoming radiate towards the valve apices, 89 (mostly 8) in 10 μm. Striae are uniseriate throughout (white arrow in
<figureCitation box="[1287,1387,581,608]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Fig. 142</figureCitation>
). The striae are composed of round to rectangular areolae covered externally with fine pored cribra (2545 poroids),
<quantity box="[1367,1452,617,643]" metricMagnitude="-1" metricUnit="m" metricValue="2.286" metricValueMax="2.54" metricValueMin="2.032" pageId="32" pageNumber="33" unit="in" value="9.0" valueMax="10.0" valueMin="8.0">810 in</quantity>
10 μm. The inter-areolar thickenings have fin-like silica ridges that are serrated with ca. 57 notched edges (
<figureCitation box="[1341,1439,652,678]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Fig. 146</figureCitation>
). The areolae increase in size towards the valve margins (
<figureCitation box="[772,990,687,713]" captionStart="FIGURES 142147" captionStartId="34.[136,243,1922,1944]" captionTargetBox="[178,1409,193,1895]" captionTargetId="figure-23@34.[177,1410,191,1896]" captionTargetPageId="34" captionText="FIGURES 142147. Diploneis tessellata sp. nov., SEM external valve views, Lake Tanganyika. 142, 144, 145. Specimen from Kiganza Bay. 143, 146, 147. Specimens from Isanga Bay. 142, 143. View of a whole valve; white arrowed uniseriate striae pattern. 144. Distal raphe ends with deflected terminal fissures. 145. Detail semi-circular shaped interalveolar fin ornamentations on the canal. 146. Central area with bent teardrop depression with proximal raphe ends. 147. Half-valve showing the raphe branch. Scale bars = 10 μm (Fig. 143), 5 μm (Figs 142, 147), 2 μm (Figs 144146)." figureDoi="http://doi.org/10.5281/zenodo.7875161" httpUri="https://zenodo.org/record/7875161/files/figure.png" pageId="32" pageNumber="33">Figs 142, 143, 147</figureCitation>
). Internally, the alveoli open via a single elongated opening covered with a thin silica layer (
<figureCitation box="[708,867,722,748]" captionStart="FIGURES 148151" captionStartId="35.[136,243,1926,1948]" captionTargetBox="[151,1433,194,1901]" captionTargetId="figure-18@35.[150,1434,193,1902]" captionTargetPageId="35" captionText="FIGURES 148151. Diploneis tessellata sp. nov., SEM internal valve views, Lake Tanganyika. 148. Specimen from Mutondwe Island. 149. Specimen from Kalambo Falls Lodge. 150. Specimen from Isanga Bay. 151. Specimen from Rukoma area. 148151. View of a whole valve, showing simple and slightly elevated raphe, alveoli covered by a thin silica layer, and closed longitudinal canal. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875165" httpUri="https://zenodo.org/record/7875165/files/figure.png" pageId="32" pageNumber="33">Figs 148, 149</figureCitation>
). The valvocopula has serrated advalvar edges (
<figureCitation captionStart="FIGURES 148151" captionStartId="35.[136,243,1926,1948]" captionTargetBox="[151,1433,194,1901]" captionTargetId="figure-18@35.[150,1434,193,1902]" captionTargetPageId="35" captionText="FIGURES 148151. Diploneis tessellata sp. nov., SEM internal valve views, Lake Tanganyika. 148. Specimen from Mutondwe Island. 149. Specimen from Kalambo Falls Lodge. 150. Specimen from Isanga Bay. 151. Specimen from Rukoma area. 148151. View of a whole valve, showing simple and slightly elevated raphe, alveoli covered by a thin silica layer, and closed longitudinal canal. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875165" httpUri="https://zenodo.org/record/7875165/files/figure.png" pageId="32" pageNumber="33">Figs 148, 150</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection pageId="32" pageNumber="33" type="materials_examined">
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,286,793,819]" pageId="32" pageNumber="33">Type:—</emphasis>
<materialsCitation collectingDate="2018-09-01" collectionCode="BM" collectorName="H. Buscher" country="Zambia" county="Kalambo Falls" elevation="770" latitude="-8.623778" location="Lake Tanganyika" longLatPrecision="1" longitude="31.199915" municipality="Kalambo Falls Lodge" pageId="32" pageNumber="33" specimenCode="BM-108996" specimenCount="1" typeStatus="holotype">
<collectingCountry box="[285,581,793,819]" name="Zambia" pageId="32" pageNumber="33">REPUBLIC OF ZAMBIA</collectingCountry>
,
<location LSID="urn:lsid:plazi:treatment:038487E2FFFE2662BCF1FF09BC2A75D4:8EF2602FFFFE2662BE36FC8EBB757337" box="[591,785,793,819]" country="Zambia" county="Kalambo Falls" latitude="-8.623778" longLatPrecision="1" longitude="31.199915" municipality="Kalambo Falls Lodge" name="Lake Tanganyika" pageId="32" pageNumber="33">Lake Tanganyika</location>
,
<collectingMunicipality box="[795,1038,793,819]" pageId="32" pageNumber="33">
<collectingCounty box="[795,958,793,819]" pageId="32" pageNumber="33">Kalambo Falls</collectingCounty>
Lodge
</collectingMunicipality>
, at
<quantity box="[1074,1144,793,819]" metricMagnitude="2" metricUnit="m" metricValue="7.7" pageId="32" pageNumber="33" unit="m" value="770.0">
<elevation box="[1074,1144,793,819]" metricMagnitude="2" metricUnit="m" metricValue="7.7" pageId="32" pageNumber="33" unit="m" value="770.0">770 m</elevation>
</quantity>
elevation; mud,
<quantity box="[1328,1384,793,819]" metricMagnitude="1" metricUnit="m" metricValue="1.8" pageId="32" pageNumber="33" unit="m" value="18.0">
<elevation box="[1328,1384,793,819]" metricMagnitude="1" metricUnit="m" metricValue="1.8" pageId="32" pageNumber="33" unit="m" value="18.0">18 m</elevation>
</quantity>
water depth, collected
<collectionCode box="[324,416,828,854]" pageId="32" pageNumber="33">SCUBA</collectionCode>
diving,
<geoCoordinate box="[512,660,828,855]" degrees="8" direction="south" minutes="37" orientation="latitude" pageId="32" pageNumber="33" precision="1" seconds="25.6" value="-8.623778">8°3725.6” S</geoCoordinate>
<geoCoordinate box="[668,833,828,855]" degrees="31" direction="east" minutes="11" orientation="longitude" pageId="32" pageNumber="33" precision="1" seconds="59.7" value="31.199915">31°1159.7” E</geoCoordinate>
,
<emphasis box="[847,975,828,854]" italics="true" pageId="32" pageNumber="33">
<collectorName box="[847,975,828,854]" pageId="32" pageNumber="33">H. Büscher</collectorName>
</emphasis>
,
<emphasis box="[990,1207,828,854]" italics="true" pageId="32" pageNumber="33">
<date box="[990,1207,828,854]" pageId="32" pageNumber="33" value="2018-09-01">
<collectingDate box="[990,1207,828,854]" pageId="32" pageNumber="33" value="2018-09-01">
1
<superScript attach="left" box="[1004,1015,828,842]" fontSize="6" pageId="32" pageNumber="33">st</superScript>
September 2018
</collectingDate>
</date>
</emphasis>
(
<typeStatus box="[1223,1323,828,854]" pageId="32" pageNumber="33">holotype</typeStatus>
designated here, circled specimen BM-108986! =
<figureCitation box="[574,670,863,889]" captionStart="FIGURES 132141" captionStartId="33.[136,243,1953,1975]" captionTargetBox="[178,1409,190,1929]" captionTargetId="figure-19@33.[178,1409,190,1929]" captionTargetPageId="33" captionText="FIGURES 132141. Diploneis tessellata sp. nov., LM valve views, Lake Tanganyika. 132, 134141. Specimens from Kalambo Falls Lodge. 133. Specimen from Kalya Bay. Fig. 138. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875155" httpUri="https://zenodo.org/record/7875155/files/figure.png" pageId="32" pageNumber="33">Fig. 138</figureCitation>
,
</materialsCitation>
<materialsCitation collectingDate="2018-09-01" collectionCode="SCUBA" collectorName="H. Buscher" country="Zambia" county="Kalambo Falls" elevation="770" latitude="-8.623778" location="Lake Tanganyika" longLatPrecision="1" longitude="31.199915" municipality="Kalambo Falls Lodge" pageId="32" pageNumber="33" specimenCode="ANSP-GC17215" specimenCount="1" typeStatus="isotype">
isotypes
<specimenCode box="[781,979,863,890]" collectionCode="ANSP-GC" pageId="32" pageNumber="33">ANSP-GC17215</specimenCode>
!, CANA-129336!). Type material CANA-129315. Registration: http://phycobank.org/103720
</materialsCitation>
</paragraph>
<paragraph blockId="32.[136,1452,229,1488]" box="[189,1191,933,960]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,615,933,960]" pageId="32" pageNumber="33">Pictures of the isolated specimen:—</emphasis>
LM micrograph on 1000× magnification (
<figureCitation box="[1085,1178,933,960]" captionStart="FIGURES 211" captionStartId="8.[136,243,1955,1977]" captionTargetBox="[203,1382,194,1930]" captionTargetId="figure-23@8.[201,1383,193,1932]" captionTargetPageId="8" captionText="FIGURES 211. Diploneis salzburgeri sp. nov., LM valve views, Lake Tanganyika. 2, 3, 5, 6, 9. Specimens from southern parts of Lake Tanganyika, Kalambo Falls Lodge. 4. Specimen from Kalya Bay. 7. Specimen from Ndole Bay. 8. Specimen from Jakobsen Beach, near Kigoma. 10, 11. Specimens from Buhingu Island. Fig. 7. Holotype specimen. Scale bar = 10 μm." figureDoi="http://doi.org/10.5281/zenodo.7875095" httpUri="https://zenodo.org/record/7875095/files/figure.png" pageId="32" pageNumber="33">
Fig. S
<quantity box="[1154,1178,934,960]" metricMagnitude="3" metricUnit="kg" metricValue="3.0" pageId="32" pageNumber="33" unit="t" value="3.0">3t</quantity>
</figureCitation>
).
</paragraph>
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,399,968,995]" pageId="32" pageNumber="33">Sequence data:—</emphasis>
Plastid gene
<emphasis box="[543,580,969,995]" italics="true" pageId="32" pageNumber="33">rbc</emphasis>
L sequence (GenBank accession:
<collectionCode box="[960,1001,968,994]" pageId="32" pageNumber="33">OQ</collectionCode>
660296) and nuclear encoded 18S (
<collectionCode box="[1398,1451,969,995]" country="0" httpUri="http://grbio.org/cool/fye2-vfes" name="Saratov State University" pageId="32" pageNumber="33">SSU</collectionCode>
rDNA) sequence (GenBank accession:
<collectionCode box="[576,618,1004,1031]" pageId="32" pageNumber="33">OQ</collectionCode>
629557).
</paragraph>
</subSubSection>
<subSubSection pageId="32" pageNumber="33" type="etymology">
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,356,1039,1065]" pageId="32" pageNumber="33">Etymology:—</emphasis>
The specific epithet
<taxonomicName authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[612,718,1039,1065]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="tessellata">
<emphasis box="[612,718,1039,1065]" italics="true" pageId="32" pageNumber="33">tessellata</emphasis>
</taxonomicName>
refers to the blocky, tiled appearance of the areolae of this species.
</paragraph>
</subSubSection>
<subSubSection pageId="32" pageNumber="33" type="biology_ecology">
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,521,1109,1136]" pageId="32" pageNumber="33">Ecology and distribution:—</emphasis>
This species has only been observed in Lake Tanganyika along the coasts of
<collectingCountry box="[1366,1452,1109,1135]" name="Zambia" pageId="32" pageNumber="33">Zambia</collectingCountry>
and
<collectingCountry box="[184,285,1145,1171]" name="Tanzania" pageId="32" pageNumber="33">Tanzania</collectingCountry>
in the three sub-basins, especially in Kalambo Falls Lodge, Isanga Bay, Mutondwe Island, Kalya Bay, Rukoma area, and Kiganza Bay (see
<figureCitation box="[551,657,1180,1206]" captionStart="FIGURE 1" captionStartId="3.[136,229,1594,1616]" captionTargetBox="[171,1421,879,1532]" captionTargetId="figure-263@3.[151,1436,844,1567]" captionTargetPageId="3" captionText="FIGURE 1. Maps ofAfrica with major drainage systems. a) Map of Africa indicating the general location of the East African Rift (framed in bold grey lines). b) Map of East African Rift with sample (purple circles) and type (green circles) localities for all twenty-five new Diploneis species. c) Bathymetric map of the three sub-basins of Lake Tanganyika with close-up of sampling sites in the lake. d) Key sampling sites in the northern Kigoma sub-basin of Lake Tanganyika. e) Key sampling sites in the central Kundwe sub-basin of Lake Tanganyika. f) Key sampling sites in the southern Kipili sub-basin of Lake Tanganyika. Location details for each species are given in the descriptions." figureDoi="http://doi.org/10.5281/zenodo.7875093" httpUri="https://zenodo.org/record/7875093/files/figure.png" pageId="32" pageNumber="33">Fig. 1cf</figureCitation>
). The species is not very abundant in the alkaline, moderately mineral-rich and highly transparent waters and occurs in sandy and muddy substrates (sometimes with mollusk shells) between 10 and
<quantity box="[217,274,1250,1277]" metricMagnitude="1" metricUnit="m" metricValue="3.3" pageId="32" pageNumber="33" unit="m" value="33.0">33 m</quantity>
water depth. It can also be found on submerged rocks in the littoral areas at Jakobsen Beach, at
<quantity box="[1340,1383,1250,1277]" metricMagnitude="0" metricUnit="m" metricValue="5.0" pageId="32" pageNumber="33" unit="m" value="5.0">5 m</quantity>
depth on Buhingu Island, and at
<quantity box="[435,492,1286,1312]" metricMagnitude="1" metricUnit="m" metricValue="2.0" pageId="32" pageNumber="33" unit="m" value="20.0">20 m</quantity>
depth in Isanga Bay, probably due to upwelling, currents, and/or turbidity.
<emphasis italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="tessellata" status="sp. nov.">Diploneis tessellata</taxonomicName>
<taxonomicNameLabel box="[250,335,1321,1346]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
occurs together with
<emphasis box="[581,836,1321,1347]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[581,743,1321,1347]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="salzburgeri" status="sp. nov.">D. salzburgeri</taxonomicName>
<taxonomicNameLabel box="[750,836,1321,1346]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[850,1064,1321,1346]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[850,971,1321,1346]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="cristata" status="sp. nov.">D. cristata</taxonomicName>
<taxonomicNameLabel box="[978,1064,1321,1346]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[1078,1305,1321,1346]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[1078,1211,1321,1346]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="gigantea" status="sp. nov.">D. gigantea</taxonomicName>
<taxonomicNameLabel box="[1219,1305,1321,1346]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[1319,1412,1321,1347]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="fossa" status="sp. nov.">D. fossa</taxonomicName>
<taxonomicNameLabel pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[195,458,1357,1382]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[195,367,1357,1382]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="cocquytiana" status="sp. nov.">D. cocquytiana</taxonomicName>
<taxonomicNameLabel box="[373,458,1357,1382]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[472,724,1356,1382]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[472,632,1356,1382]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="kilhamiana" status="sp. nov.">D. kilhamiana</taxonomicName>
<taxonomicNameLabel box="[639,724,1357,1382]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[737,1000,1356,1382]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[737,908,1356,1382]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="tanganyikae" status="sp. nov.">D. tanganyikae</taxonomicName>
<taxonomicNameLabel box="[915,1000,1357,1382]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, and
<emphasis box="[1061,1290,1356,1382]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[1061,1198,1356,1382]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="serrulata" status="sp. nov.">D. serrulata</taxonomicName>
<taxonomicNameLabel box="[1205,1290,1357,1382]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</paragraph>
<paragraph blockId="32.[136,1452,229,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,559,1391,1417]" pageId="32" pageNumber="33">Main differential characters:—</emphasis>
Valve shape, striae density, areolae density, external thick fin-like ornamentations evenly distributed across the valve, and poroids 2545 per areola.
</paragraph>
<paragraph blockId="32.[136,1452,229,1488]" box="[189,1102,1461,1488]" pageId="32" pageNumber="33">
<emphasis bold="true" box="[189,404,1461,1487]" pageId="32" pageNumber="33">Similar species:—</emphasis>
<emphasis box="[404,684,1461,1487]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[404,592,1461,1487]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="tenera" status="sp. nov.">Diploneis tenera</taxonomicName>
<taxonomicNameLabel box="[599,684,1462,1487]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
,
<emphasis box="[697,909,1462,1487]" italics="true" pageId="32" pageNumber="33">
<taxonomicName authority="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone, 2023" authorityName="Jovanovska &amp; Wilson &amp; Hamilton &amp; Stone" authorityYear="2023" box="[697,817,1462,1487]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="cristata" status="sp. nov.">D. cristata</taxonomicName>
<taxonomicNameLabel box="[824,909,1462,1487]" pageId="32" pageNumber="33" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
, and
<taxonomicName authorityName="Cleve" authorityYear="1894" baseAuthorityName="Kutzing" box="[969,1096,1461,1487]" class="Bacillariophyceae" family="Naviculaceae" genus="Diploneis" higherTaxonomySource="GBIF" kingdom="Chromista" order="Naviculales" pageId="32" pageNumber="33" phylum="Bacillariophyta" rank="species" species="elliptica">
<emphasis box="[969,1096,1461,1487]" italics="true" pageId="32" pageNumber="33">D. elliptica</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>