<document ID-DOI="10.11646/phytotaxa.567.3.1" ID-GBIF-Dataset="52e28e8a-d989-48c3-8a9f-189556756f59" ID-ISSN="1179-3163" ID-Zenodo-Dep="7156659" checkinTime="1665137904061" checkinUser="plazi" docAuthor="Mateusz, Rybak, Natalia, Kochman-Kędziora &amp; Muzaky, Luthfi Oktiyas" docDate="2022" docId="BF32D47FF964FFB4FF59625D8022FBFF" docLanguage="en" docName="phytotaxa.567.3.1.pdf" docOrigin="Phytotaxa 567 (3)" docSource="http://dx.doi.org/10.11646/phytotaxa.567.3.1" docStyle="DocumentStyle:96748F8F1B6C902996E134952A3A36B9.5:Phytotaxa.2014-.journal_article" docStyleId="96748F8F1B6C902996E134952A3A36B9" docStyleName="Phytotaxa.2014-.journal_article" docStyleVersion="5" docTitle="Hantzschia amphioxys Grunow" docType="treatment" docVersion="4" lastPageNumber="217" masterDocId="430BAC07F96EFFBEFFD1602F8215FF9F" masterDocTitle="Four novel species from the genus Hantzschia Grunow (Bacillariophyta: Bacillariaceae) from rural areas of Southeast Asia" masterLastPageNumber="221" masterPageNumber="207" pageNumber="217" updateTime="1665425723435" updateUser="ExternalLinkService" zenodo-license-figures="UNSPECIFIED" zenodo-license-treatments="UNSPECIFIED">
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<mods:title>Four novel species from the genus Hantzschia Grunow (Bacillariophyta: Bacillariaceae) from rural areas of Southeast Asia</mods:title>
</mods:titleInfo>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Mateusz, Rybak</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0001-8998-9537</mods:nameIdentifier>
<mods:affiliation>University of Rzeszów, Department of Agroecology and Forest Utilization, Ćwiklińskiej 1 a, 35 - 601, Rzeszów, Poland &amp; matrybak 91 @ gmail. com; https: // orcid. org / 0000 - 0001 - 8998 - 9537</mods:affiliation>
<mods:nameIdentifier type="email">matrybak91@gmail.com</mods:nameIdentifier>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Natalia, Kochman-Kędziora</mods:namePart>
<mods:nameIdentifier type="ORCID">0000-0003-1006-1715</mods:nameIdentifier>
<mods:affiliation>University of Rzeszów, Department of Ecology and Environmental Protection, Zelwerowicza 4, 35 - 601, Rzeszów, Poland &amp; nkochman @ ur. edu. pl; https: // orcid. org / 0000 - 0003 - 1006 - 1715</mods:affiliation>
<mods:nameIdentifier type="email">nkochman@ur.edu.pl</mods:nameIdentifier>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Muzaky, Luthfi Oktiyas</mods:namePart>
<mods:affiliation>University of Brawijaya, Department of Marine Science, Jl. Veteran Malang, East Java Indonesia &amp; University of Szczecin, Institute of Marine and Environmental Sciences, Mickiewicza 16 A, 70 - 383 Szczecin, Poland</mods:affiliation>
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<mods:title>Phytotaxa</mods:title>
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<mods:part>
<mods:date>2022</mods:date>
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<mods:number>2022-10-07</mods:number>
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<mods:detail type="volume">
<mods:number>567</mods:number>
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<mods:number>3</mods:number>
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<mods:url>http://dx.doi.org/10.11646/phytotaxa.567.3.1</mods:url>
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<mods:identifier type="DOI">10.11646/phytotaxa.567.3.1</mods:identifier>
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<taxonomicName authority="(Ehrenberg) Grunow" authorityName="Grunow" baseAuthorityName="Ehrenberg" baseAuthorityYear="1843" box="[136,639,626,653]" class="Bacillariophyceae" family="Bacillariaceae" genus="Hantzschia" kingdom="Fungi" order="Bacillariales" pageId="10" pageNumber="217" phylum="Bacillariophyta" rank="species" species="amphioxys">
<emphasis bold="true" box="[136,398,626,653]" italics="true" pageId="10" pageNumber="217">Hantzschia amphioxys</emphasis>
(Ehrenberg) Grunow
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(
<figureCitation box="[653,783,626,652]" captionStart="FIGURES 75–93" captionStartId="9.[136,243,2010,2032]" captionTargetBox="[151,1436,281,1985]" captionTargetId="figure-65@9.[151,1436,281,1985]" captionTargetPageId="9" captionText="FIGURES 75–93. LM microphotographs of Hantzschia amphioxys in size diminution series (75–87), scale bar = 10 μm. SEM microphotographs of H. amphioxys (88–93), scale bar = 10 μm (88, 89), 5 μm (92), 2,5 μm (90, 91, 93)." figureDoi="http://doi.org/10.5281/zenodo.7156675" httpUri="https://zenodo.org/record/7156675/files/figure.png" pageId="10" pageNumber="217">Figs 75–93</figureCitation>
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<emphasis bold="true" box="[136,264,698,724]" pageId="10" pageNumber="217">Basionym:</emphasis>
<taxonomicName authority="(Ehrenberg 1843: 413) Grunow" authorityName="Grunow" baseAuthorityName="Ehrenberg" baseAuthorityPageNumber="413" baseAuthorityYear="1843" box="[271,840,698,724]" class="Bacillariophyceae" family="Eunotiaceae" genus="Eunotia" higherTaxonomySource="GBIF" kingdom="Chromista" order="Eunotiales" pageId="10" pageNumber="217" phylum="Bacillariophyta" rank="species" species="amphioxys">
<emphasis box="[271,486,698,724]" italics="true" pageId="10" pageNumber="217">Eunotia amphioxys</emphasis>
(
<bibRefCitation author="Ehrenberg, C. G." box="[501,732,698,724]" pageId="10" pageNumber="217" pagination="291 - 445" refId="ref7038" refString="Ehrenberg, C. G. (1843) Verbreitung und Einfluss des mikroskopischen Lebens in Sud-und Nord-Amerika. Abhandlungen der Koniglichen Akademie der Wissenschaftenzu Berlin 1841: 291 - 445." type="journal article" year="1843">Ehrenberg1843: 413</bibRefCitation>
) Grunow
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(in 
<bibRefCitation author="Cleve, P. T. &amp; Grunow, A." box="[884,1198,698,724]" pageId="10" pageNumber="217" pagination="1 - 121" refId="ref7007" refString="Cleve, P. T. &amp; Grunow, A. (1880) Beitragezur Kenntnis der arktischen Diatomeen. Kungliga Svenska vetenskaps akademien shandlingar 17: 1 - 121." type="journal article" year="1880">Cleve &amp; Grunow 1880: 103</bibRefCitation>
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<emphasis bold="true" box="[189,688,734,760]" pageId="10" pageNumber="217">Morphology of the observed population:</emphasis>
Valves clearly dorsiventral with convex ventral side. Dorsal side distinctly concave in middle, but convex near the apices. Valve apices clearly protracted and sub-capitate. Valve dimensions (n=30): length 23.5–69.5 μm, width 4.5–5.8 μm. Width at widest part of the valve face: 4.6–5.9 μm. Unequally spaced fibulae, 
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10 μm. Each fibulae connected to 1–4 transapically costae (
<figureCitation box="[1204,1336,842,868]" captionStart="FIGURES 75–93" captionStartId="9.[136,243,2010,2032]" captionTargetBox="[151,1436,281,1985]" captionTargetId="figure-65@9.[151,1436,281,1985]" captionTargetPageId="9" captionText="FIGURES 75–93. LM microphotographs of Hantzschia amphioxys in size diminution series (75–87), scale bar = 10 μm. SEM microphotographs of H. amphioxys (88–93), scale bar = 10 μm (88, 89), 5 μm (92), 2,5 μm (90, 91, 93)." figureDoi="http://doi.org/10.5281/zenodo.7156675" httpUri="https://zenodo.org/record/7156675/files/figure.png" pageId="10" pageNumber="217">Figs 89, 92</figureCitation>
). Striae in middle part of the valve slightly radiate, becoming parallel toward the apices, 
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10 μm. Areolae not discernible in light microscope (
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10 μm). Distal raphe endings clearly hooked. Internally, fibulae not equidistant. Central raphe endings deflected to opposite directions.
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<emphasis bold="true" box="[189,442,986,1012]" pageId="10" pageNumber="217">Taxonomic remarks:</emphasis>
The observed population (Sample No. 2018/436) was characterized by longer valves comparing with other populations from the literature data (
<tableCitation box="[794,868,1022,1048]" captionStart="TABLE 2" captionStartId="10.[136,224,1446,1470]" captionTargetPageId="10" captionText="TABLE 2. Comparison of valve features between H. minima sp. nov. and similar taxa." httpUri="http://table.plazi.org/id/63E435E1F964FFB4FF5965898636FA22" pageId="10" pageNumber="217" tableUuid="63E435E1F964FFB4FF5965898636FA22">Tab. 2</tableCitation>
). Nevertheless other features including valve width, striae and areolae density as well as internal and external proximal raphe endings confirm compliance with the current morphological concept of this species.
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