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<document id="0178F5AF162C4D8C3EA837307A7BCB33" ID-CLB-Dataset="299061" ID-DOI="10.5281/zenodo.12118784" ID-GBIF-Dataset="2b921c3c-8618-439e-96da-1de9c66a90f9" ID-ISSN="0026-279X" ID-Zenodo-Dep="12118784" IM.bibliography_approvedBy="julia" IM.illustrations_approvedBy="julia" IM.materialsCitations_approvedBy="julia" IM.metadata_approvedBy="julia" IM.tables_approvedBy="julia" IM.taxonomicNames_approvedBy="julia" IM.treatments_approvedBy="julia" checkinTime="1718742264011" checkinUser="felipe" docAuthor="Lobban, Christopher S. &amp; Witkowski, Andrzej" docDate="2023" docId="03C287AAFFF50B0DFF357BE2FDDEFB53" docLanguage="en" docName="Micronesica.2023.02.1-75.pdf" docOrigin="Micronesica 2023 (2)" docStyle="DocumentStyle:73477DD41873F4E732E2765E250AF97D.1:Micronesica.2013-.journal_article.type1" docStyleId="73477DD41873F4E732E2765E250AF97D" docStyleName="Micronesica.2013-.journal_article.type1" docStyleVersion="1" docTitle="Mastogloia pisciculus Cleve 1893" docType="treatment" docVersion="5" lastPageNumber="11" masterDocId="FFFBFFD2FFFC0B07FFD37D20FF9BFFCC" masterDocTitle="Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist" masterLastPageNumber="75" masterPageNumber="1" pageNumber="10" updateTime="1719584991735" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-NC-ND-4.0">
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<mods:title id="D835B21C4C92C3254233025E0C8F325D">Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist</mods:title>
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<mods:namePart id="EE31A3FEC7FF7738715FEF80A0A606CC">Lobban, Christopher S.</mods:namePart>
<mods:affiliation id="CD95849FC8CE1EDE44A63A5BD9B33D83">Division of Natural Sciences, University of Guam, Mangilao, GU 96923, USA clobban @ triton. uog. edu</mods:affiliation>
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<mods:namePart id="63BA8DFCE33628AD039A82A07B7E5D35">Witkowski, Andrzej</mods:namePart>
<mods:affiliation id="D08EBA9B5FCAB9755EF833ED657BB543">University of Szczecin, Institute of Marine and Environmental Sciences Mickiewicza 16 a, PL 70 - 383 Szczecin, Poland</mods:affiliation>
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<treatment id="03C287AAFFF50B0DFF357BE2FDDEFB53" ID-DOI="http://doi.org/10.5281/zenodo.12581867" ID-GBIF-Taxon="233850918" ID-Zenodo-Dep="12581867" LSID="urn:lsid:plazi:treatment:03C287AAFFF50B0DFF357BE2FDDEFB53" httpUri="http://treatment.plazi.org/id/03C287AAFFF50B0DFF357BE2FDDEFB53" lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10">
<subSubSection id="C3716537FFF50B0EFF357BE2FAE2F910" box="[230,1401,1730,1756]" pageId="9" pageNumber="10" type="nomenclature">
<paragraph id="8BD436BCFFF50B0EFF357BE2FAE2F910" blockId="9.[230,1402,1730,1831]" box="[230,1401,1730,1756]" pageId="9" pageNumber="10">
<heading id="D09C81D0FFF50B0EFF357BE2FAE2F910" box="[230,1401,1730,1756]" centered="true" fontSize="11" level="2" pageId="9" pageNumber="10" reason="2">
<taxonomicName id="4C6B4D3FFFF50B0EFF357BE2FDC2F910" authority="Cleve" authorityName="Cleve" authorityYear="1893" box="[230,601,1730,1756]" class="Bacillariophyceae" family="Mastogloiaceae" genus="Mastogloia" higherTaxonomySource="GBIF,CoL" isUncertain="true" kingdom="Chromista" order="Mastogloiales" pageId="9" pageNumber="10" phylum="Ochrophyta" rank="species" species="pisciculus">
<emphasis id="B91FEAAEFFF50B0EFF357BE2FEF7F910" box="[230,364,1730,1756]" italics="true" pageId="9" pageNumber="10">Mastogloia</emphasis>
cf.
<emphasis id="B91FEAAEFFF50B0EFE4A7BE2FD95F910" box="[409,526,1730,1756]" italics="true" pageId="9" pageNumber="10">pisciculus</emphasis>
Cleve
</taxonomicName>
<figureCitation id="13502A39FFF50B0EFB257BE2FAE2F910" box="[1270,1401,1730,1756]" captionStart="Figures 65–70" captionStartId="59.[290,370,959,983]" captionTargetId="figure-17@60.[231,1383,485,1666]" captionTargetPageId="60" captionText="Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm." figureDoi="http://doi.org/10.5281/zenodo.12581771" httpUri="https://zenodo.org/record/12581771/files/figure.png" pageId="9" pageNumber="10">Figs 68–70</figureCitation>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C3716537FFF50B0EFF357BCBFB56F8EB" pageId="9" pageNumber="10" type="reference_group">
<paragraph id="8BD436BCFFF50B0EFF357BCBFB56F8EB" blockId="9.[230,1402,1730,1831]" pageId="9" pageNumber="10">
Ref. illus.:
<bibRefCitation id="EFFA4B4DFFF50B0EFEB97BCBFE6FF8C9" author="Cleve, P. T." box="[362,500,1771,1797]" pageId="9" pageNumber="10" pagination="55 - 58" refId="ref13893" refString="Cleve, P. T. 1893. Sur quelques especes nouvelles ou peu connues (suite). Le Diatomiste 2 (15): 55 - 58, plate 3." type="journal article" year="1893">Cleve 1893</bibRefCitation>
;
<bibRefCitation id="EFFA4B4DFFF50B0EFDD27BCBFD04F8C9" author="Hustedt, F." box="[513,671,1771,1797]" pageId="9" pageNumber="10" refId="ref14962" refString="Hustedt, F. 1931 - 1959. Die Kieselalgen Deutschlands, Osterreichs und der Schweiz. In: Rabenhorst's Kryptogamenflora, Band 7, Teil 2." type="journal volume" year="1931">Hustedt 1931</bibRefCitation>
–1959, p. 473, fig. 990;
<bibRefCitation id="EFFA4B4DFFF50B0EFC6E7BCBFB7CF8C9" author="Stephens, F. C. &amp; R. A. Gibson" box="[957,1255,1771,1797]" pageId="9" pageNumber="10" pagination="219 - 248" refId="ref19905" refString="Stephens, F. C. &amp; R. A. Gibson. 1980. Ultrastructural studies on some Mastogloia (Bacillariophyceae) species belonging to the group Sulcatae. Nova Hedwigia 33: 219 - 248." type="journal article" year="1980">Stephens &amp; Gibson 1980</bibRefCitation>
, p. 228, figs 31–36;
<bibRefCitation id="EFFA4B4DFFF50B0EFEEC7A2DFDBBF8EB" author="Pennesi, C. &amp; M. Poulin &amp; M. De Stefano &amp; T. Romagnoli &amp; C. Totti" box="[319,544,1805,1831]" pageId="9" pageNumber="10" pagination="1248 - 1264" refId="ref18276" refString="Pennesi, C., M. Poulin, M. De Stefano, T. Romagnoli &amp; C. Totti. 2012. Morphological studies of some marine Mastogloia (Bacillariophyceae) belonging to section Sulcatae, including the description of new species. Journal of Phycology 48: 1248 - 1264." type="journal article" year="2012">Pennesi et al. 2012</bibRefCitation>
. p. 1254, figs 7A–H;
<bibRefCitation id="EFFA4B4DFFF50B0EFCCE7A2DFBB2F8EB" author="Loir, M. &amp; G. Novarino" box="[797,1065,1805,1831]" pageId="9" pageNumber="10" pagination="1 - 133" refId="ref17347" refString="Loir, M. &amp; G. Novarino. 2013. Marine Mastogloia Thwaites ex W. Sm. and Stigmaphora Wallich species from the French Lesser Antilles. Diatom Monographs 16: 1 - 133." type="journal article" year="2013">Loir &amp; Novarino 2013</bibRefCitation>
, p. 42, pl. 18c
</paragraph>
</subSubSection>
<subSubSection id="C3716537FFF50B0EFF357A17FBA5F8B7" pageId="9" pageNumber="10" type="description">
<paragraph id="8BD436BCFFF50B0EFF357A17FE54F89D" blockId="9.[230,463,1847,1873]" box="[230,463,1847,1873]" pageId="9" pageNumber="10">Samples: GU52X-5</paragraph>
<paragraph id="8BD436BCFFF50B0EFF357A41FBA5F8B7" blockId="9.[230,1086,1889,1915]" box="[230,1086,1889,1915]" pageId="9" pageNumber="10">
Dimensions: Length 30–35 µm, width 14 µm, striae radiate,
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10 µm
</paragraph>
</subSubSection>
<subSubSection id="C3716537FFF60B0DFF357DCEFE34FDDA" pageId="10" pageNumber="11" type="diagnosis">
<paragraph id="8BD436BCFFF60B0DFF357DCEFE34FDDA" blockId="10.[230,1402,238,534]" pageId="10" pageNumber="11">
Diagnostics: Broadly lanceolate, rostrate, depressed area not strongly differentiated but a longitudinal line visible in the middle of it (
<figureCitation id="13502A39FFF60B0DFD317C30FCFEFEE6" box="[738,869,272,298]" captionStart="Figures 65–70" captionStartId="59.[290,370,959,983]" captionTargetId="figure-17@60.[231,1383,485,1666]" captionTargetPageId="60" captionText="Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm." figureDoi="http://doi.org/10.5281/zenodo.12581771" httpUri="https://zenodo.org/record/12581771/files/figure.png" pageId="10" pageNumber="11">Figs 68, 69</figureCitation>
arrows). Chambers quadrate to elongate with convex inner edges, not reaching apices. In
<collectionCode id="ED7AAE79FFF60B0DFD317C12FC85FE80" box="[738,798,306,332]" pageId="10" pageNumber="11">SEM</collectionCode>
external view (
<figureCitation id="13502A39FFF60B0DFC017C12FBBCFE80" box="[978,1063,306,332]" captionStart="Figures 65–70" captionStartId="59.[290,370,959,983]" captionTargetId="figure-17@60.[231,1383,485,1666]" captionTargetPageId="60" captionText="Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm." figureDoi="http://doi.org/10.5281/zenodo.12581771" httpUri="https://zenodo.org/record/12581771/files/figure.png" pageId="10" pageNumber="11">Fig. 69</figureCitation>
) uniform areolae in the outer zone, transapically elongated areolae in the depressed zone, irregular rib between them; raphe thickened. Internally, outer zone with transapical costae, inner zone smooth. Areolae opening internally, by quadrate set of small pores; outer zone of striae with costate virgae, inner zone with areolae in irregular longitudinal line, sporadically two lines (
<figureCitation id="13502A39FFF60B0DFC617C99FB9DFE1F" box="[946,1030,441,467]" captionStart="Figures 65–70" captionStartId="59.[290,370,959,983]" captionTargetId="figure-17@60.[231,1383,485,1666]" captionTargetPageId="60" captionText="Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm." figureDoi="http://doi.org/10.5281/zenodo.12581771" httpUri="https://zenodo.org/record/12581771/files/figure.png" pageId="10" pageNumber="11">Fig. 70</figureCitation>
arrow). Partecta
<quantity id="4C939B59FFF60B0DFB017C99FA9BFE1F" box="[1234,1280,441,467]" metricMagnitude="-2" metricUnit="m" metricValue="7.62" pageId="10" pageNumber="11" unit="in" value="3.0">3 in</quantity>
10 µm, in middle portion only, apically elongated with convex inner margins and scattered pores on the abvalvar surface.
</paragraph>
</subSubSection>
<subSubSection id="C3716537FFF60B0DFF357F06FDDEFB53" pageId="10" pageNumber="11" type="discussion">
<paragraph id="8BD436BCFFF60B0DFF357F06FDDEFB53" blockId="10.[230,1403,550,1183]" pageId="10" pageNumber="11">
Comments: Uncommon in this biofilm sample. Specimens were smaller than Cleve’s and at low end of range in Hustedt.
<bibRefCitation id="EFFA4B4DFFF60B0DFE097F67FD19FDAD" author="Hustedt, F." box="[474,642,583,609]" pageId="10" pageNumber="11" refId="ref14962" refString="Hustedt, F. 1931 - 1959. Die Kieselalgen Deutschlands, Osterreichs und der Schweiz. In: Rabenhorst's Kryptogamenflora, Band 7, Teil 2." type="journal volume" year="1931">Hustedt (1931</bibRefCitation>
–1959),
<bibRefCitation id="EFFA4B4DFFF60B0DFD377F67FBBBFDAD" author="Stephens, F. C. &amp; R. A. Gibson" box="[740,1056,583,609]" pageId="10" pageNumber="11" pagination="219 - 248" refId="ref19905" refString="Stephens, F. C. &amp; R. A. Gibson. 1980. Ultrastructural studies on some Mastogloia (Bacillariophyceae) species belonging to the group Sulcatae. Nova Hedwigia 33: 219 - 248." type="journal article" year="1980">Stephens &amp; Gibson (1980)</bibRefCitation>
and
<bibRefCitation id="EFFA4B4DFFF60B0DFB887F67FAE1FDAD" author="Loir, M. &amp; G. Novarino" box="[1115,1402,583,609]" pageId="10" pageNumber="11" pagination="1 - 133" refId="ref17347" refString="Loir, M. &amp; G. Novarino. 2013. Marine Mastogloia Thwaites ex W. Sm. and Stigmaphora Wallich species from the French Lesser Antilles. Diatom Monographs 16: 1 - 133." type="journal article" year="2013">Loir &amp; Novarino (2013)</bibRefCitation>
all show much variation. Moreover, there are considerable discrepancies between the various descriptions, leading us to qualify our identification with “cf.” First,
<bibRefCitation id="EFFA4B4DFFF60B0DFBDE7FABFB2EFD69" author="Hustedt, F." box="[1037,1205,651,677]" pageId="10" pageNumber="11" refId="ref14962" refString="Hustedt, F. 1931 - 1959. Die Kieselalgen Deutschlands, Osterreichs und der Schweiz. In: Rabenhorst's Kryptogamenflora, Band 7, Teil 2." type="journal volume" year="1931">Hustedt (1931</bibRefCitation>
–1959: 558) said that although the forms he found (only near
<collectingCountry id="F37C762CFFF60B0DFCD27F8CFC1BFD0A" box="[769,896,684,710]" name="Seychelles" pageId="10" pageNumber="11">Seychelles</collectingCountry>
) differed from
<bibRefCitation id="EFFA4B4DFFF60B0DFBE87F8CFB76FD0A" author="Cleve, P. T." box="[1083,1261,684,710]" pageId="10" pageNumber="11" pagination="55 - 58" refId="ref13893" refString="Cleve, P. T. 1893. Sur quelques especes nouvelles ou peu connues (suite). Le Diatomiste 2 (15): 55 - 58, plate 3." type="journal article" year="1893">Cleve’s (1893)</bibRefCitation>
description (specimens from Florida), e.g. in stria density, he decided not to separate them. Stephens &amp; Gibson reported stria densities in line with
<typeStatus id="54D0881EFFF60B0DFD5D7FD0FD5AFCC6" box="[654,705,752,778]" pageId="10" pageNumber="11">type</typeStatus>
material in
<bibRefCitation id="EFFA4B4DFFF60B0DFC807FD0FC74FCC6" author="Cleve, P. T." box="[851,1007,752,778]" pageId="10" pageNumber="11" pagination="55 - 58" refId="ref13893" refString="Cleve, P. T. 1893. Sur quelques especes nouvelles ou peu connues (suite). Le Diatomiste 2 (15): 55 - 58, plate 3." type="journal article" year="1893">Cleve (1893)</bibRefCitation>
and
<bibRefCitation id="EFFA4B4DFFF60B0DFBF87FD0FB56FCC6" author="Boyer, C. S." box="[1067,1229,752,778]" pageId="10" pageNumber="11" pagination="229 - 583" refId="ref13748" refString="Boyer, C. S. 1927. Synopsis of North American Diatomaceae, Supplement, Part 2. Naviculatae, Surirellatae. Proceedings of the Academy of Natural Sciences of Philadelphia 79: 229 - 583." type="journal article" year="1927">Boyer (1927)</bibRefCitation>
. Specimens in Pennesi et al. were from Suluwesi,
<collectingCountry id="F37C762CFFF60B0DFD5F7E32FC99FCE0" box="[652,770,786,812]" name="Indonesia" pageId="10" pageNumber="11">Indonesia</collectingCountry>
. The
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studies by
<bibRefCitation id="EFFA4B4DFFF60B0DFBDA7E32FADDFCE0" author="Stephens, F. C. &amp; R. A. Gibson" box="[1033,1350,786,812]" pageId="10" pageNumber="11" pagination="219 - 248" refId="ref19905" refString="Stephens, F. C. &amp; R. A. Gibson. 1980. Ultrastructural studies on some Mastogloia (Bacillariophyceae) species belonging to the group Sulcatae. Nova Hedwigia 33: 219 - 248." type="journal article" year="1980">Stephens &amp; Gibson (1980)</bibRefCitation>
and
<bibRefCitation id="EFFA4B4DFFF60B0DFF357E13FE44FC81" author="Pennesi, C. &amp; M. Poulin &amp; M. De Stefano &amp; T. Romagnoli &amp; C. Totti" box="[230,479,819,845]" pageId="10" pageNumber="11" pagination="1248 - 1264" refId="ref18276" refString="Pennesi, C., M. Poulin, M. De Stefano, T. Romagnoli &amp; C. Totti. 2012. Morphological studies of some marine Mastogloia (Bacillariophyceae) belonging to section Sulcatae, including the description of new species. Journal of Phycology 48: 1248 - 1264." type="journal article" year="2012">Pennesi et al. (2012)</bibRefCitation>
are not completely comparable because partecta found by the latter were all broken. The partecta are square to apically lengthened with convex inner margins. Stephens &amp; Gibson showed them to have delicate silica plaques with perforations; partecta in our specimens seem longer than in these other reports and we saw pores but no plaques (
<figureCitation id="13502A39FFF60B0DFBFC7EB9FB1DFC7F" box="[1071,1158,921,947]" captionStart="Figures 65–70" captionStartId="59.[290,370,959,983]" captionTargetId="figure-17@60.[231,1383,485,1666]" captionTargetPageId="60" captionText="Figures 65–70. Mastogloia. Figs 65, 66. Mastogloia ovata exterior and interior valve faces. Fig. 67. Mastogloia pseudolatecostata (Bikar Atoll, Marshall Is.), external valve face with part of valvocopula showing partecta. Figs. 68–70. Mastogloia cf. pisciculus. Fig.68. LM (DIC) with foci on valve face and partecta Arrows on this and next image point to longitudinal rib bisecting the inner zone. Fig. 69. External surface, SEM. Fig. 70. Internal valve face and partecta, also showing partly double row of areolae (arrow). Scale bars: Figs 67, 68 = 10 µm, Figs 65, 66, 69, 70 = 5 µm." figureDoi="http://doi.org/10.5281/zenodo.12581771" httpUri="https://zenodo.org/record/12581771/files/figure.png" pageId="10" pageNumber="11">Fig. 70</figureCitation>
). Stephens &amp; Gibson did not observe the edge of the mantle, where we and Pennesi et al. saw biseriate striae. Internally, there is a single line of quadripunctate foramina under the depressed area shown in both Stephens &amp; Gibson and Pennesi et al. but in our specimens, there was a much looser row, sometimes double.
<bibRefCitation id="EFFA4B4DFFF60B0DFF357900FDB8FBF6" author="Stephens, F. C. &amp; R. A. Gibson" box="[230,547,1056,1082]" pageId="10" pageNumber="11" pagination="219 - 248" refId="ref19905" refString="Stephens, F. C. &amp; R. A. Gibson. 1980. Ultrastructural studies on some Mastogloia (Bacillariophyceae) species belonging to the group Sulcatae. Nova Hedwigia 33: 219 - 248." type="journal article" year="1980">Stephens &amp; Gibson (1980</bibRefCitation>
; Florida) considered whether their specimens might match
<taxonomicName id="4C6B4D3FFFF60B0DFB277900FEDFFB97" authority="Hendey" authorityName="Hendey" authorityYear="1970" class="Bacillariophyceae" family="Mastogloiaceae" genus="Mastogloia" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Mastogloiales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="arabica">
<emphasis id="B91FEAAEFFF60B0DFB277900FAE2FBF6" box="[1268,1401,1056,1082]" italics="true" pageId="10" pageNumber="11">M. arabica</emphasis>
Hendey
</taxonomicName>
, or if that might be synonymous with
<taxonomicName id="4C6B4D3FFFF60B0DFCE77961FC4CFB97" authorityName="Cleve" authorityYear="1893" box="[820,983,1089,1115]" class="Bacillariophyceae" family="Mastogloiaceae" genus="Mastogloia" higherTaxonomySource="GBIF,CoL" kingdom="Chromista" order="Mastogloiales" pageId="10" pageNumber="11" phylum="Ochrophyta" rank="species" species="pisciculus">
<emphasis id="B91FEAAEFFF60B0DFCE77961FC4CFB97" box="[820,983,1089,1115]" italics="true" pageId="10" pageNumber="11">M. pisciculus</emphasis>
</taxonomicName>
. Establishing boundaries in these disparate populations of rare taxa will require more work; for now, we present our
<collectionCode id="ED7AAE79FFF60B0DFB707943FB44FBB1" box="[1187,1247,1123,1149]" pageId="10" pageNumber="11">SEM</collectionCode>
observations to define what we found here.
</paragraph>
</subSubSection>
</treatment>
</document>
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