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<document id="595FC03DC98BDA3548CCAA9B0D0D0C28" ID-CLB-Dataset="299716" ID-DOI="10.11646/zootaxa.5474.5.4" ID-GBIF-Dataset="ce52c1e1-a0fa-4124-8253-ce62e62ad02d" ID-ISSN="1175-5326" ID-Zenodo-Dep="12730823" ID-ZooBank="189347B3-7151-45FB-9240-8CF3B820766C" IM.bibliography_approvedBy="tatiana" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="tatiana" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="tatiana" IM.treatments_approvedBy="felipe" checkinTime="1720373796508" checkinUser="plazi" docAuthor="Sirenko, Boris" docDate="2024" docId="AB6287B3DE5BFF71FF0602A8FF3FFB96" docLanguage="en" docName="zootaxa.5474.5.4.pdf" docOrigin="Zootaxa 5474 (5)" docSource="http://dx.doi.org/10.11646/zootaxa.5474.5.4" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Leptochiton antarcticus Sirenko 2015" docType="treatment" docVersion="4" lastPageNumber="528" masterDocId="575BFFCBDE5DFF77FF91031EFFCFFFC5" masterDocTitle="The chitons of the family Leptochitonidae (Mollusca: Polyplacophora) from the Emperor Seamounts, Pacific Ocean" masterLastPageNumber="532" masterPageNumber="522" pageNumber="528" updateTime="1720773745017" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
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<mods:title id="E2C12C03D9540B44785A57B695F2B592">The chitons of the family Leptochitonidae (Mollusca: Polyplacophora) from the Emperor Seamounts, Pacific Ocean</mods:title>
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<mods:date id="09DD15AAFE6A942683107D097FC2F9F7">2024</mods:date>
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<mods:classification id="6CDD9A5614C09DDB2E79D0EF98E4F250">journal article</mods:classification>
<mods:identifier id="6919E97097B743BCAC56090575C7D7E3" type="CLB-Dataset">299716</mods:identifier>
<mods:identifier id="575E94B8A3E037F078197264F4362CE4" type="DOI">10.11646/zootaxa.5474.5.4</mods:identifier>
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<treatment id="AB6287B3DE5BFF71FF0602A8FF3FFB96" ID-DOI="http://doi.org/10.5281/zenodo.12730839" ID-GBIF-Taxon="235045957" ID-Zenodo-Dep="12730839" LSID="urn:lsid:plazi:treatment:AB6287B3DE5BFF71FF0602A8FF3FFB96" httpUri="http://treatment.plazi.org/id/AB6287B3DE5BFF71FF0602A8FF3FFB96" lastPageNumber="528" pageId="6" pageNumber="528">
<subSubSection id="6BD1652EDE5BFF71FF0602A8FDA6FE15" box="[151,617,438,465]" pageId="6" pageNumber="528" type="nomenclature">
<paragraph id="237436A5DE5BFF71FF0602A8FDA6FE15" blockId="6.[151,617,438,465]" box="[151,617,438,465]" pageId="6" pageNumber="528">
<heading id="783C81C9DE5BFF71FF0602A8FDA6FE15" bold="true" box="[151,617,438,465]" fontSize="11" level="1" pageId="6" pageNumber="528" reason="1">
<taxonomicName id="E4CB4D26DE5BFF71FF0602A8FDA6FE15" ID-CoL="3TLVS" authority="Sirenko, 2015" authorityName="Sirenko" authorityYear="2015" box="[151,617,438,465]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FF0602A8FDA6FE15" bold="true" box="[151,617,438,465]" pageId="6" pageNumber="528">
<emphasis id="11BFEAB7DE5BFF71FF0602A8FE78FE14" bold="true" box="[151,439,438,465]" italics="true" pageId="6" pageNumber="528">Leptochiton antarcticus</emphasis>
Sirenko, 2015
</emphasis>
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="6BD1652EDE5BFF71FF0602E5FC57FDD6" box="[151,920,507,531]" pageId="6" pageNumber="528" type="reference_group">
<paragraph id="237436A5DE5BFF71FF0602E5FC57FDD6" blockId="6.[151,920,507,531]" box="[151,920,507,531]" pageId="6" pageNumber="528">
<treatmentCitationGroup id="03DB118BDE5BFF71FF0602E5FC57FDD6" box="[151,920,507,531]" pageId="6" pageNumber="528">
<treatmentCitation id="A26A10B4DE5BFF71FF0602E5FD92FDD6" author="Sirenko, B. I." box="[151,605,507,531]" page="139" pageId="6" pageNumber="528" year="2015">
<taxonomicName id="E4CB4D26DE5BFF71FF0602E5FD92FDD6" ID-CoL="3TLVS" authority="Sirenko, 2015 a: 139" authorityName="Sirenko" authorityPageNumber="139" authorityYear="2015" box="[151,605,507,531]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FF0602E5FE47FDD6" box="[151,392,507,531]" italics="true" pageId="6" pageNumber="528">Leptochiton antarcticus</emphasis>
<bibRefCitation id="475A4B54DE5BFF71FE1F02E5FD92FDD6" author="Sirenko, B. I." box="[398,605,507,531]" pageId="6" pageNumber="528" pagination="139 - 146" refId="ref5000" refString="Sirenko, B. I. (2015 a) Leptochiton antarcticus (Mollusca, Polyplacophora) - a new species from the Southern Ocean. Ruthenica, 25 (4), 139 - 146." type="journal article" year="2015">Sirenko, 2015a: 139</bibRefCitation>
</taxonomicName>
</treatmentCitation>
, figs 1–7; 2019b: 71,
<figureCitation id="BBF02A20DE5BFF71FCAB02E5FC5BFDD6" box="[826,916,507,531]" captionStart-0="FIGURE 1" captionStart-1="FIGURE 2" captionStart-2="FIGURE 3" captionStartId-0="1.[151,250,848,872]" captionStartId-1="2.[151,250,1850,1874]" captionStartId-2="3.[151,250,1316,1340]" captionTargetBox-0="[151,1436,181,825]" captionTargetBox-1="[151,1436,345,1826]" captionTargetBox-2="[151,1436,181,1292]" captionTargetId-0="figure-23@1.[151,1436,181,825]" captionTargetId-1="figure-50@2.[151,1436,345,1826]" captionTargetId-2="figure-24@3.[151,1436,181,1292]" captionTargetPageId-0="1" captionTargetPageId-1="2" captionTargetPageId-2="3" captionText-0="FIGURE 1. Map with locations of the Emperor Seamounts explored during the 33rd cruise of the R/V Odyssey in 1984." captionText-1="FIGURE 2. Leptochiton milwaukensis n. sp., Pacific Ocean, Emperor Seamounts, Milwaukee Seamount, 675 m, holotype (ZIN 2473) BL 3.4 mm. A. Valve I, dorsal view. B. Valve V, dorsal view. C. Valve IV, dorsal view. D. Valve II, dorsal view. E. Valve V, detail of tegmentum in central area. F. Valve V, rostral view. G. Whole specimen, dorsal and lateral views." captionText-2="FIGURE 3. Leptochiton milwaukensis n. sp., Pacific Ocean, Emperor Seamounts, Milwaukee Seamount, 675 m, holotype (ZIN 2473) BL 3.4 mm. A. Dorsal scales, marginal needles. B. Dorsal scales, marginal needles and scales. C. Sutural needles. D. Dorsal and ventral scales." figureDoi-0="http://doi.org/10.5281/zenodo.12730827" figureDoi-1="http://doi.org/10.5281/zenodo.12730829" figureDoi-2="http://doi.org/10.5281/zenodo.12730831" httpUri-0="https://zenodo.org/record/12730827/files/figure.png" httpUri-1="https://zenodo.org/record/12730829/files/figure.png" httpUri-2="https://zenodo.org/record/12730831/files/figure.png" pageId="6" pageNumber="528">Figs 1–3</figureCitation>
.
</treatmentCitationGroup>
</paragraph>
</subSubSection>
<subSubSection id="6BD1652EDE5BFF71FF06015FFEEAFD66" pageId="6" pageNumber="528" type="materials_examined">
<paragraph id="237436A5DE5BFF71FF06015FFC7CFD99" blockId="6.[151,1436,577,1107]" box="[151,947,577,604]" pageId="6" pageNumber="528">
<emphasis id="11BFEAB7DE5BFF71FF06015FFE8AFD9E" bold="true" box="[151,325,577,603]" pageId="6" pageNumber="528">Type material.</emphasis>
<typeStatus id="FC708807DE5BFF71FEDD015FFE7BFD9E" box="[332,436,577,603]" pageId="6" pageNumber="528" type="holotype">Holotype</typeStatus>
(ZISP 2250);
<specimenCount id="35CDFD2CDE5BFF71FDC5015FFD1BFD99" box="[596,724,577,604]" count="2" pageId="6" pageNumber="528" type="generic" typeStatus="paratype">2 paratypes</specimenCount>
(ZISP 2251, 2252).
</paragraph>
<paragraph id="237436A5DE5BFF71FF56017BFEEAFD66" blockId="6.[151,1436,577,1107]" pageId="6" pageNumber="528">
<materialsCitation id="93A33CF8DE5BFF71FF56017BFEEFFD66" ID-GBIF-Occurrence="4905210305" country="South Georgia and the South Sandwich Islands" elevation="151" latitude="-59.7" location="Southern Ocean" longLatPrecision="103" longitude="-28.215" municipality="Scotia Sea" pageId="6" pageNumber="528" specimenCount="1" typeStatus="holotype">
<emphasis id="11BFEAB7DE5BFF71FF56017BFEA7FDBA" bold="true" box="[199,360,613,639]" pageId="6" pageNumber="528">
<typeStatus id="FC708807DE5BFF71FF56017BFECDFDBA" box="[199,258,613,639]" pageId="6" pageNumber="528">Type</typeStatus>
locality.
</emphasis>
<location id="2614607EDE5BFF71FEE0017BFDE6FDBA" LSID="urn:lsid:plazi:treatment:AB6287B3DE5BFF71FF0602A8FF3FFB96:2614607EDE5BFF71FEE0017BFDE6FDBA" box="[369,553,613,639]" country="South Georgia and the South Sandwich Islands" latitude="-59.7" longLatPrecision="103" longitude="-28.215" municipality="Scotia Sea" name="Southern Ocean" pageId="6" pageNumber="528">Southern Ocean</location>
,
<collectingMunicipality id="C310ACDFDE5BFF71FDA6017BFD7EFDBA" box="[567,689,613,639]" pageId="6" pageNumber="528">Scotia Sea</collectingMunicipality>
, off
<collectingCountry id="5BDC7635DE5BFF71FD79017BFC33FDBA" box="[744,1020,613,639]" name="South Georgia and the South Sandwich Islands" pageId="6" pageNumber="528">South Sandwich Islands</collectingCountry>
,
<geoCoordinate id="46FF5062DE5BFF71FB98017BFBB2FD45" box="[1033,1149,613,640]" degrees="59" direction="south" minutes="42.0" orientation="latitude" pageId="6" pageNumber="528" precision="92" value="-59.7">59°42.0’S</geoCoordinate>
,
<geoCoordinate id="46FF5062DE5BFF71FB1A017BFAC8FDBA" box="[1163,1287,613,639]" degrees="28" direction="west" minutes="12.9" orientation="longitude" pageId="6" pageNumber="528" precision="92" value="-28.215">28°12.9’W</geoCoordinate>
,
<quantity id="E4339B40DE5BFF71FA85017BFA58FD45" box="[1300,1431,613,640]" metricMagnitude="2" metricUnit="m" metricValue="1.51" metricValueMax="1.6" metricValueMin="1.42" pageId="6" pageNumber="528" unit="m" value="151.0" valueMax="160.0" valueMin="142.0">
<elevation id="A8E6D196DE5BFF71FA85017BFA58FD45" box="[1300,1431,613,640]" metricMagnitude="2" metricUnit="m" metricValue="1.51" metricValueMax="1.6" metricValueMin="1.42" pageId="6" pageNumber="528" unit="m" value="151.0" valueMax="160.0" valueMin="142.0">142–160 m</elevation>
</quantity>
, gravel, mud
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="6BD1652EDE5BFF71FF5601B3FF3FFB96" pageId="6" pageNumber="528" type="discussion">
<paragraph id="237436A5DE5BFF71FF5601B3FF06FCBE" blockId="6.[151,1436,577,1107]" pageId="6" pageNumber="528">
<emphasis id="11BFEAB7DE5BFF71FF5601B3FEF4FD02" bold="true" box="[199,315,685,711]" pageId="6" pageNumber="528">Remarks.</emphasis>
Besides the widespread specimens known from the slopes of
<collectingCountry id="5BDC7635DE5BFF71FC6A01B3FBBCFD02" box="[1019,1139,685,711]" name="Antarctica" pageId="6" pageNumber="528">Antarctica</collectingCountry>
, the only other report of a specimen of this species was found on the slope of Nintoku Seamount (
<bibRefCitation id="475A4B54DE5BFF71FC5101CFFBA3FD2E" author="Sirenko, B. I." box="[960,1132,721,747]" pageId="6" pageNumber="528" pagination="71 - 74" refId="ref5190" refString="Sirenko, B. I. (2019 b) First finding of a widely distributed Antarctic chiton species (Mollusca: Polyplacophora) in the North Pacific. Ruthenica, 29 (1), 71 - 74. https: // doi. org / 10.35885 / ruthenica. 2019.29 (1). 3" type="journal article" year="2019">Sirenko 2019b</bibRefCitation>
). Externally,
<taxonomicName id="E4CB4D26DE5BFF71FA9001CCFA53FD2E" authorityName="Sirenko" authorityYear="2015" box="[1281,1436,722,747]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FA9001CCFA53FD2E" box="[1281,1436,722,747]" italics="true" pageId="6" pageNumber="528">L. antarcticus</emphasis>
</taxonomicName>
differs little from the other two species of the Emperor Seamounts (
<taxonomicName id="E4CB4D26DE5BFF71FCFB01EBFB44FCCA" authorityName="Sirenko" authorityYear="2024" box="[874,1163,757,783]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="milwaukensis" status="sp. nov.">
<emphasis id="11BFEAB7DE5BFF71FCFB01EBFB44FCCA" box="[874,1163,757,783]" italics="true" pageId="6" pageNumber="528">Leptochiton milwaukensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="0A8C57CCDE5BFF71FB1F01EBFB05FCD5" box="[1166,1226,757,784]" pageId="6" pageNumber="528" rank="species">
<emphasis id="11BFEAB7DE5BFF71FB1F01EBFB0CFCCA" bold="true" box="[1166,1219,757,783]" pageId="6" pageNumber="528">n. sp</emphasis>
.
</taxonomicNameLabel>
and
<taxonomicName id="E4CB4D26DE5BFF71FB6B01EBFF38FCF6" baseAuthorityName="Dall" baseAuthorityYear="1878" class="Polyplacophora" family="Leptochitonidae" genus="Belknapchiton" higherTaxonomySource="CoL,GBIF" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="belknapi">
<emphasis id="11BFEAB7DE5BFF71FB6B01EBFF38FCF6" italics="true" pageId="6" pageNumber="528">Belknapchiton belknapi</emphasis>
</taxonomicName>
). Like these species,
<taxonomicName id="E4CB4D26DE5BFF71FE740004FDB0FCF6" authorityName="Sirenko" authorityYear="2015" box="[485,639,794,820]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FE740004FE3AFCF6" box="[485,501,794,819]" italics="true" pageId="6" pageNumber="528">L</emphasis>
.
<emphasis id="11BFEAB7DE5BFF71FD930004FDB0FCF6" box="[514,639,794,819]" italics="true" pageId="6" pageNumber="528">antarcticus</emphasis>
</taxonomicName>
also has tegmentum granules arranged quincuncially on the head valve, lateral areas of intermediate valves and postmucronal area of tail valve and the dorsal scales have longitudinal ribs.
</paragraph>
<paragraph id="237436A5DE5BFF71FF56009BFF3FFB96" blockId="6.[151,1436,577,1107]" pageId="6" pageNumber="528">
<taxonomicName id="E4CB4D26DE5BFF71FF56009BFE1EFC5A" authorityName="Sirenko" authorityYear="2015" box="[199,465,901,927]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FF56009BFE1EFC5A" box="[199,465,901,927]" italics="true" pageId="6" pageNumber="528">Leptochiton antarcticus</emphasis>
</taxonomicName>
differs from
<taxonomicName id="E4CB4D26DE5BFF71FDF50098FCD7FC5A" authorityName="Sirenko" authorityYear="2024" box="[612,792,901,927]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="milwaukensis" status="n. sp.">
<emphasis id="11BFEAB7DE5BFF71FDF50098FCD7FC5A" box="[612,792,901,927]" italics="true" pageId="6" pageNumber="528">L. milwaukensis</emphasis>
</taxonomicName>
<emphasis id="11BFEAB7DE5BFF71FC8F009BFC92FC5A" bold="true" box="[798,861,901,927]" pageId="6" pageNumber="528">
<taxonomicNameLabel id="0A8C57CCDE5BFF71FC8F009BFC92FC5A" box="[798,861,901,927]" pageId="6" pageNumber="528" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
by having 5 round pores of aesthetes in granules of the tegmentum (
<emphasis id="11BFEAB7DE5BFF71FEC000B4FEA0FC06" box="[337,367,938,963]" italics="true" pageId="6" pageNumber="528">vs.</emphasis>
3 pores, 2 of them slit-shaped in
<taxonomicName id="E4CB4D26DE5BFF71FD7C00B4FC6CFC06" authorityName="Sirenko" authorityYear="2024" box="[749,931,937,963]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="milwaukensis" status="n. sp.">
<emphasis id="11BFEAB7DE5BFF71FD7C00B4FC6CFC06" box="[749,931,937,963]" italics="true" pageId="6" pageNumber="528">L. milwaukensis</emphasis>
</taxonomicName>
<emphasis id="11BFEAB7DE5BFF71FC3A00B7FC24FC06" bold="true" box="[939,1003,937,963]" pageId="6" pageNumber="528">
<taxonomicNameLabel id="0A8C57CCDE5BFF71FC3A00B7FC24FC06" box="[939,1003,937,963]" pageId="6" pageNumber="528" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
). The shape of the central teeth of the radula is also very different in these two species.
<taxonomicName id="E4CB4D26DE5BFF71FD5A00D3FC19FC22" authorityName="Sirenko" authorityYear="2015" box="[715,982,973,999]" class="Polyplacophora" family="Leptochitonidae" genus="Leptochiton" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="antarcticus">
<emphasis id="11BFEAB7DE5BFF71FD5A00D3FC19FC22" box="[715,982,973,999]" italics="true" pageId="6" pageNumber="528">Leptochiton antarcticus</emphasis>
</taxonomicName>
differs from
<taxonomicName id="E4CB4D26DE5BFF71FBFC00D3FAB7FC22" baseAuthorityName="Dall" baseAuthorityYear="1878" box="[1133,1400,973,999]" class="Polyplacophora" family="Leptochitonidae" genus="Belknapchiton" higherTaxonomySource="CoL,GBIF" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="belknapi">
<emphasis id="11BFEAB7DE5BFF71FBFC00D3FAB7FC22" box="[1133,1400,973,999]" italics="true" pageId="6" pageNumber="528">Belknapchiton belknapi</emphasis>
</taxonomicName>
by having 5 aesthetes in granules of the tegmentum (
<emphasis id="11BFEAB7DE5BFF71FD5700ECFD12FBCE" box="[710,733,1010,1035]" italics="true" pageId="6" pageNumber="528">vs</emphasis>
. 3 aesthetes in
<taxonomicName id="E4CB4D26DE5BFF71FC1B00ECFBC6FBCE" baseAuthorityName="Dall" baseAuthorityYear="1878" box="[906,1033,1009,1035]" class="Polyplacophora" family="Leptochitonidae" genus="Belknapchiton" higherTaxonomySource="CoL,GBIF" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="belknapi">
<emphasis id="11BFEAB7DE5BFF71FC1B00ECFBC6FBCE" box="[906,1033,1009,1035]" italics="true" pageId="6" pageNumber="528">B. belknapi</emphasis>
</taxonomicName>
) and 12–16 longitudinal ribs on the dorsal scales (
<emphasis id="11BFEAB7DE5BFF71FEA70708FE82FBEA" box="[310,333,1046,1071]" italics="true" pageId="6" pageNumber="528">vs</emphasis>
. 1–3 ribs in
<taxonomicName id="E4CB4D26DE5BFF71FE4A0708FD94FBEA" baseAuthorityName="Dall" baseAuthorityYear="1878" box="[475,603,1045,1071]" class="Polyplacophora" family="Leptochitonidae" genus="Belknapchiton" higherTaxonomySource="CoL,GBIF" kingdom="Animalia" order="Lepidopleurida" pageId="6" pageNumber="528" phylum="Mollusca" rank="species" species="belknapi">
<emphasis id="11BFEAB7DE5BFF71FE4A0708FD94FBEA" box="[475,603,1045,1071]" italics="true" pageId="6" pageNumber="528">B. belknapi</emphasis>
</taxonomicName>
). The shape of the central teeth of the radula is very different in these two species.
</paragraph>
</subSubSection>
</treatment>
</document>
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