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<document id="99DD9D0BB9D0FA8AA51D5BD3489436AB" ID-CLB-Dataset="299703" ID-DOI="10.11646/zootaxa.5476.1.23" ID-GBIF-Dataset="f19cec98-eb1f-4305-8027-69ce085404c9" ID-ISSN="1175-5326" ID-Zenodo-Dep="12681748" ID-ZooBank="4250D709-E06C-4CFF-84D6-7A9E62427FE2" 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.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="valdenar" checkinTime="1720375291131" checkinUser="plazi" docAuthor="Mazancourt, Valentin De, Mazel, Virgile, Marquet, Gérard, Poupin, Joseph &amp; Keith, Philippe" docDate="2024" docId="03FF87F3E31DFFE51CBEF9D6FA35FE90" docLanguage="en" docName="zootaxa.5476.1.23.pdf" docOrigin="Zootaxa 5476 (1)" docSource="http://dx.doi.org/10.11646/zootaxa.5476.1.23" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Ptychognathus ngankeeae Mazancourt, Mazel, Marquet, Poupin &amp; Keith, 2024, sp. nov." docType="treatment" docVersion="6" lastPageNumber="289" masterDocId="FFC6FF8BE30EFFF31C29FFF2FFA1FFD1" masterDocTitle="Integrative taxonomy study of brackish water crabs of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from Polynesia, with description of two new species" masterLastPageNumber="297" masterPageNumber="267" pageNumber="286" updateTime="1720727319533" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
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<mods:title id="385FF93A719B3E955937A433328A5E30">Integrative taxonomy study of brackish water crabs of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from Polynesia, with description of two new species</mods:title>
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<mods:namePart id="406A347FEDE4E415BB12D5BB172C9BE4">Mazancourt, Valentin De</mods:namePart>
<mods:affiliation id="5FACF92585558BF09C1FEB7C67A710DE">Muséum national d’Histoire naturelle, UMR BOREA, CP 026, 57, rue Cuvier, F- 75231 Paris, Cedex 05, France.</mods:affiliation>
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<mods:namePart id="2579C6A31C84228681808282304FB8F5">Mazel, Virgile</mods:namePart>
<mods:affiliation id="9CA96D58E74A03178C2ADD92098B75F2">Ichtyo-Pacific, Virgile Mazel BP 381816 Punavai, 98718 Punaauia, Tahiti, Polynésie française.</mods:affiliation>
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<mods:namePart id="33A7E7CDEFBB733C08F686B5CFE0CF13">Marquet, Gérard</mods:namePart>
<mods:affiliation id="0A15515399C6B0C596E97F7A714D7A7D">96 rue de Richelieu, 75002, Paris.</mods:affiliation>
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<mods:affiliation id="AB8137BA185A72729330E2833053E8C7">Muséum national d’Histoire naturelle, UMR BOREA, CP 026, 57, rue Cuvier, F- 75231 Paris, Cedex 05, France.</mods:affiliation>
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<taxonomicName id="4C564D66E31DFFE01CBEF9D6FE74F9EE" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[151,469,1572,1599]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="19" pageNumber="286" phylum="Arthropoda" rank="species" species="ngankeeae" status="sp. nov.">
<emphasis id="B922EAF7E31DFFE01CBEF9D6FE74F9EE" bold="true" box="[151,469,1572,1599]" italics="true" pageId="19" pageNumber="286">Ptychognathus ngankeeae</emphasis>
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<taxonomicNameLabel id="A211578CE31DFFE01DF4F9D6FD9AF9EF" box="[477,571,1572,1598]" pageId="19" pageNumber="286" rank="species">sp. nov.</taxonomicNameLabel>
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<paragraph id="8BE936E5E31DFFE01CBEF9BAFECDF9B3" blockId="19.[151,571,1572,1634]" box="[151,364,1608,1634]" pageId="19" pageNumber="286">
(
<figureCitation id="136D2A60E31DFFE01CB6F9BAFEA4F9B3" box="[159,261,1608,1634]" captionStart="FIGURE 12" captionStartId="19.[151,250,1080,1104]" captionTargetBox="[151,1436,181,1057]" captionTargetId="figure-19@19.[151,1436,181,1057]" captionTargetPageId="19" captionText="FIGURE 12. Ptychognathus barbatus (A. Milne-Edwards, 1868): A, dorsal view of a living specimen from New Caledonia (MNHN-IU-2019-210); B, ventral view of the same; D, typical habitat of the species, Wadjana mouth of waterfall, New Caledonia. Ptychognathus ngankeeae sp. nov.: C, dorsal view of a living specimen from Futuna Island. Photo credits: V. de Mazancourt (A, B, D) and J. Poupin (C)." figureDoi="http://doi.org/10.5281/zenodo.12681774" httpUri="https://zenodo.org/record/12681774/files/figure.png" pageId="19" pageNumber="286">Fig. 12C</figureCitation>
,
<figureCitation id="136D2A60E31DFFE01D38F9BAFEC5F9B3" box="[273,356,1608,1634]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="19" pageNumber="286">13A–H</figureCitation>
)
</paragraph>
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<treatmentCitationGroup id="AB4611CBE31DFFE01CBEF97EFCE9F912" pageId="19" pageNumber="286">
<emphasis id="B922EAF7E31DFFE01CBEF97EFE0DF975" box="[151,428,1676,1700]" italics="true" pageId="19" pageNumber="286">
<taxonomicName id="4C564D66E31DFFE01CBEF97EFE2FF975" ID-CoL="6WNLM" baseAuthorityName="A. Milne-Edwards" baseAuthorityYear="1868" box="[151,398,1676,1700]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="19" pageNumber="286" phylum="Arthropoda" rank="species" species="barbatus">Ptychognathus barbatus</taxonomicName>
.—
</emphasis>
<treatmentCitation id="0AF710F4E31DFFE01D85F97EFD63F975" author="Poupin, J. &amp; Juncker, M." box="[428,706,1676,1701]" page="36" pageId="19" pageNumber="286" year="2008">
<bibRefCitation id="EFC74B14E31DFFE01D85F97EFD63F975" author="Poupin, J. &amp; Juncker, M." box="[428,706,1676,1701]" pageId="19" pageNumber="286" refId="ref19175" refString="Poupin, J. &amp; Juncker, M. (2008) Crustaces des iles Wallis &amp; Futuna: Inventaire illustre, especes commercialisables et capture des formes larvaires. Rapport Technique du CRISP, janvier 2008, 43 pp. [http: // poupin. joseph. free. fr / pdf / poupin-juncker- 2008 - crustacea-wallis. pdf]" type="book" year="2008">Poupin &amp; Juncker, 2008:36</bibRefCitation>
</treatmentCitation>
.—
<treatmentCitation id="0AF710F4E31DFFE01EC9F97EFB80F975" author="Keith, P. &amp; Marquet, G." box="[736,1057,1676,1701]" page="62" pageId="19" pageNumber="286" year="2011">
<bibRefCitation id="EFC74B14E31DFFE01EC9F97EFB80F975" author="Keith, P. &amp; Marquet, G." box="[736,1057,1676,1701]" pageId="19" pageNumber="286" refId="ref17968" refString="Keith, P. &amp; Marquet, G. (2011) Poissons et crustaces d'eau douce de Wallis et Futuna. Societe Francaise d'Ichtyologie, 119 pp." type="book" year="2011">Keith &amp; Marquet, 2011: 62–63</bibRefCitation>
</treatmentCitation>
(partim: picture on page 62 only).—
<treatmentCitation id="0AF710F4E31DFFE01CEEF959FE7FF912" author="Keith, P. &amp; Marquet, G. &amp; Gerbeaux, P. &amp; Vigneux, E. &amp; Lord, C." box="[199,478,1707,1731]" page="120" pageId="19" pageNumber="286" year="2013">
<bibRefCitation id="EFC74B14E31DFFE01CEEF959FE7FF912" author="Keith, P. &amp; Marquet, G. &amp; Gerbeaux, P. &amp; Vigneux, E. &amp; Lord, C." box="[199,478,1707,1731]" pageId="19" pageNumber="286" refId="ref17997" refString="Keith, P., Marquet, G., Gerbeaux, P., Vigneux, E. &amp; Lord, C. (2013) Poissons et crustaces d'eau douce de Polynesie. Taxonomie, ecologie, biologie et gestion. Societe francaise d'Ichtyologie, Paris, 282 pp." type="book" year="2013">
Keith
<emphasis id="B922EAF7E31DFFE01D2FF95EFE98F912" box="[262,313,1707,1731]" italics="true" pageId="19" pageNumber="286">et al.</emphasis>
, 2013: 120–121
</bibRefCitation>
</treatmentCitation>
(partim: picture on page 120 only).
</treatmentCitationGroup>
</paragraph>
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<emphasis id="B922EAF7E31DFFE01CBEF900FE9EF8DA" bold="true" box="[151,319,1777,1804]" pageId="19" pageNumber="286">Type material</emphasis>
.
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<typeStatus id="54ED8847E31DFFE01D67F903FE14F8DA" box="[334,437,1777,1803]" pageId="19" pageNumber="286" type="holotype">Holotype</typeStatus>
</emphasis>
: MNHN-IU-2019-411,
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, 6.7 mm × 5.8 mm, DNA voucher
<specimenCode id="DBF09E9EE31DFFE01845F903FB6CF8DD" box="[1132,1229,1777,1804]" collectionCode="CA" country="USA" name="Chicago Academy of Sciences" pageId="19" pageNumber="286" type="Museum">CA2653</specimenCode>
,
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,
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Territory,
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13,
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, coll.
<collectorName id="26A35333E31DFFE01FEDF8E4FB8DF8FE" box="[964,1068,1813,1840]" pageId="19" pageNumber="286">J. Poupin</collectorName>
&amp;
<collectorName id="26A35333E31DFFE01866F8E4FB6EF8FE" box="[1103,1231,1813,1840]" pageId="19" pageNumber="286">M. Juncker</collectorName>
,
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<collectingDate id="EFACE9CDE31DFFE018F3F8E4FA38F8E1" box="[1242,1433,1813,1840]" pageId="19" pageNumber="286" value="2007-10-14">14 October 2007</collectingDate>
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.
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<emphasis id="B922EAF7E31DFFE01CBEF8C8FF5FF882" box="[151,254,1850,1875]" italics="true" pageId="19" pageNumber="286">Paratype</emphasis>
: MNHN-IU-2019-412,
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, 5.5 mm × 4.7 mm, DNA voucher
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,
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,
<collectorName id="26A35333E31DFFE018A3F8CBFB78F882" box="[1162,1241,1849,1875]" pageId="19" pageNumber="286">Station</collectorName>
15,
<geoCoordinate id="EE625022E31DFFE01925F8CBFA39F885" box="[1292,1432,1849,1876]" degrees="14" direction="south" minutes="17.593" orientation="latitude" pageId="19" pageNumber="286" precision="1" value="-14.293217">14°17.593'S</geoCoordinate>
,
<geoCoordinate id="EE625022E31DFFE01CBEF8AFFE8AF8A9" box="[151,299,1885,1912]" degrees="178" direction="west" minutes="9.531" orientation="longitude" pageId="19" pageNumber="286" precision="1" value="-178.15884">178°9.531'W</geoCoordinate>
, coll.
<collectorName id="26A35333E31DFFE01D47F8ACFE77F8A6" box="[366,470,1885,1912]" pageId="19" pageNumber="286">J. Poupin</collectorName>
&amp;
<collectorName id="26A35333E31DFFE01DD3F8ACFDDBF8A6" box="[506,634,1885,1912]" pageId="19" pageNumber="286">M. Juncker</collectorName>
,
<date id="FFE81025E31DFFE01EACF8AFFCE4F8A9" box="[645,837,1885,1912]" pageId="19" pageNumber="286" value="2007-10-15">
<collectingDate id="EFACE9CDE31DFFE01EACF8AFFCE4F8A9" box="[645,837,1885,1912]" pageId="19" pageNumber="286" value="2007-10-15">15 October 2007</collectingDate>
</date>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="C34C656EE31DFFE71CEEF873FF5EFF04" lastPageId="20" lastPageNumber="287" pageId="19" pageNumber="286" type="diagnosis">
<paragraph id="8BE936E5E31DFFE71CEEF873FF5EFF04" blockId="19.[151,1437,1777,2020]" lastBlockId="20.[151,1437,151,2013]" lastPageId="20" lastPageNumber="287" pageId="19" pageNumber="286">
<emphasis id="B922EAF7E31DFFE01CEEF873FEE3F84A" bold="true" box="[199,322,1921,1947]" pageId="19" pageNumber="286">Diagnosis.</emphasis>
Carapace subquadrate, dorsal surface smooth and flat; front broad, anterior margin slightly concave medially; anterolateral margin with 3 teeth including orbital tooth. Merus of third maxilliped with antero-external angle broad; exopod, 1.1–1.3 times broader than ischium. Chelipeds large, symmetrical in males, fingers with a small tuft of setae at tips of pollex; without pulvinus at base of fingers. Merus and carpus of ambulatory legs glabrous.
</paragraph>
</subSubSection>
<subSubSection id="C34C656EE31AFFE71CEEFF2CFB86F96C" pageId="20" pageNumber="287" type="description">
<paragraph id="8BE936E5E31AFFE71CEEFF2CFAB2FE24" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEFF2CFEF8FF29" bold="true" box="[199,345,222,248]" pageId="20" pageNumber="287">Description.</emphasis>
Carapace (
<figureCitation id="136D2A60E31AFFE71DF3FF2DFDE0FF28" box="[474,577,223,249]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13A</figureCitation>
) subquadrate, slightly broader than long,
<quantity id="4CAE9B00E31AFFE71837FF2DFBC1FF28" box="[1054,1120,223,249]" metricMagnitude="-2" metricUnit="m" metricValue="3.048" pageId="20" pageNumber="287" unit="in" value="1.2">1.2 in</quantity>
haplotype (
<quantity id="4CAE9B00E31AFFE718CEFF2DFA8BFF28" box="[1255,1322,223,249]" metricMagnitude="-2" metricUnit="m" metricValue="3.048" pageId="20" pageNumber="287" unit="in" value="1.2">1.2 in</quantity>
<typeStatus id="54ED8847E31AFFE7191BFF2DFA35FF28" box="[1330,1428,223,249]" pageId="20" pageNumber="287" type="paratype">paratype</typeStatus>
) times as broad, flat, dorsal surface smooth, glabrous, regions poorly defined, central H-shaped grooves distinct; with noticeable epigastric cristae. Front broad, anterior margin divided into two lobes, slightly concave medially. Frontal width 0.50 (0.47) times CW, fronto-orbital width 0.89 (0.88) times CW. Upper margin of orbit not sinuous. Anterolateral margins and supraorbital margins lined with small granules. Anterolateral margins each with 3 teeth including orbital tooth; first tooth largest and more distinct, second and third blunt, third tooth indistinct or notch. Posterolateral margins divergent posteriorly, moderately sloping outwards; lateral and posterolateral margins regularly furnished with short, soft setae. Infraorbital ridge consisting of 17 (14) small round granules.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFE0DFB8FFDC8" blockId="20.[151,1437,151,2013]" box="[199,1070,511,537]" pageId="20" pageNumber="287">
Epistome broad, median part triangular, margin with tiny granules (
<figureCitation id="136D2A60E31AFFE71F92FE0DFB80FDC8" box="[955,1057,511,537]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13B</figureCitation>
).
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFDD1FABDFD54" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
Third maxillipeds (
<figureCitation id="136D2A60E31AFFE71D8CFDD1FDADFDEC" box="[421,524,547,573]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13C</figureCitation>
) with ischium subequal in proximal and distal widths, lateral margin concave, ventral surface with longitudinal median ridge. Merus with antero-lateral angle broad; ventral surface with oblique ridge on mesial part. Exopod broad, inflated, greatest width 1.1–1.3, times of median width of ischium.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFD7DFF4CFC74" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
Chelipeds (
<figureCitation id="136D2A60E31AFFE71D64FD7DFE19FD78" box="[333,440,655,681]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13D</figureCitation>
) symmetrical in male, not granular at all. Merus without spines longer than broad
<quantity id="4CAE9B00E31AFFE71CBEFD41FF7DFD1C" box="[151,220,691,717]" metricMagnitude="-2" metricUnit="m" metricValue="5.334" pageId="20" pageNumber="287" unit="in" value="2.1">2.1 in</quantity>
<typeStatus id="54ED8847E31AFFE71CCEFD41FEE8FD1C" box="[231,329,691,717]" pageId="20" pageNumber="287" type="holotype">holotype</typeStatus>
(
<quantity id="4CAE9B00E31AFFE71D74FD41FE03FD1C" box="[349,418,691,717]" metricMagnitude="-2" metricUnit="m" metricValue="4.318" pageId="20" pageNumber="287" unit="in" value="1.7">1.7 in</quantity>
<typeStatus id="54ED8847E31AFFE71D87FD41FDB1FD1C" box="[430,528,691,717]" pageId="20" pageNumber="287" type="paratype">paratype</typeStatus>
) times as long as wide, outer lower margin bluntly carinate, smooth. Carpus unarmed, strongly inflated, slightly shorter than wide 1.0 (0.8) times as long as wide; surface of carpus smooth. Outer surface of palm in male smooth, without distinct granules or horizontal ridge, inner surface glabrous, middle part convex. Dactylus distinctly shorter than palm 1.0 (0.7) times as long as palm; inner surface glabrous, terminating in small, hoof-shaped corneous claw, bearing 10 (7) small blunt teeth, pollex, with 4 larger blunt teeth (the two middle teeth are bigger). Proximal half of fingers with long dense soft setae in male. Without pulvinus at base of fingers.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFC5DFC33FADC" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
Ambulatory legs (P2–5) comparatively long, slender, somewhat compressed laterally; P4 longest (male: length 1.4 times as long as CW): P5 shortest. Merus elongated, subrectangular in lateral view, unarmed. Anterior and posterior margins of merus of P2–5 glabrous. Anterior and posterior margins of carpus glabrous. Propodus with dense short setae on anterior margins. Ventral surface without rows of short setae. Dactylus terminating in subacute corneous claw, with dense short setae on anterior margins, short and long setae on posterior margins, dorsal and ventral surface with no rows of short setae. P3 (
<figureCitation id="136D2A60E31AFFE71E81FB91FCABFBAC" box="[680,778,1123,1149]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13E</figureCitation>
) with merus
<quantity id="4CAE9B00E31AFFE71FB5FB90FC7DFBAC" box="[924,988,1122,1149]" metricMagnitude="-2" metricUnit="m" metricValue="6.35" pageId="20" pageNumber="287" unit="in" value="2.5">2.5 in</quantity>
<typeStatus id="54ED8847E31AFFE71FCBFB91FBE5FBAC" box="[994,1092,1123,1149]" pageId="20" pageNumber="287" type="holotype">holotype</typeStatus>
(
<quantity id="4CAE9B00E31AFFE7187BFB91FB32FBAC" box="[1106,1171,1123,1149]" metricMagnitude="-2" metricUnit="m" metricValue="6.604" pageId="20" pageNumber="287" unit="in" value="2.6">2.6 in</quantity>
<typeStatus id="54ED8847E31AFFE718B0FB91FB5AFBAC" box="[1177,1275,1123,1149]" pageId="20" pageNumber="287" type="paratype">paratype</typeStatus>
) times as long as wide, carpus 2.4 (1.6) times as long as wide, propodus 2.0 (1.5) times as long as wide, dactylus 3.7 (3.3) times as long as wide), dactylus 1.0 (1.3) times as long as propodus. P5 (
<figureCitation id="136D2A60E31AFFE71F52FB59FC7DFB14" box="[891,988,1195,1221]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13F</figureCitation>
) merus
<quantity id="4CAE9B00E31AFFE7181CFB58FBD4FB14" box="[1077,1141,1194,1221]" metricMagnitude="-2" metricUnit="m" metricValue="6.35" pageId="20" pageNumber="287" unit="in" value="2.5">2.5 in</quantity>
<typeStatus id="54ED8847E31AFFE71852FB59FB7CFB14" box="[1147,1245,1195,1221]" pageId="20" pageNumber="287" type="holotype">holotype</typeStatus>
(
<quantity id="4CAE9B00E31AFFE718C5FB59FA8DFB14" box="[1260,1324,1195,1221]" metricMagnitude="-2" metricUnit="m" metricValue="5.334" pageId="20" pageNumber="287" unit="in" value="2.1">2.1 in</quantity>
<typeStatus id="54ED8847E31AFFE7191BFB59FA35FB14" box="[1330,1428,1195,1221]" pageId="20" pageNumber="287" type="paratype">paratype</typeStatus>
) times as long as wide, carpus 1.9 (1.5) times as long as wide, propodus 1.3 (1.4) times as long as wide, dactylus 2.5 (2.6) times as long as wide), dactylus 0.8 times as long as propodus.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFAE5FF4AFA10" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
Male pleon (
<figureCitation id="136D2A60E31AFFE71D7FFAE5FE1DFAE0" box="[342,444,1303,1329]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13G</figureCitation>
) narrow, broadly triangular, nearly smooth, distinctly narrowed at base of telson; lateral margins of first to fifth somites nearly straight; margins covered with short setae, distal margin of telson without tuft of setae. Telson linguiform, terminal margin broadly rounded; length 1.2 times basal width,
<quantity id="4CAE9B00E31AFFE718EBFAADFAA0FAA8" box="[1218,1281,1375,1401]" metricMagnitude="-2" metricUnit="m" metricValue="2.794" pageId="20" pageNumber="287" unit="in" value="1.1">1.1 in</quantity>
<typeStatus id="54ED8847E31AFFE7192EFAADFAC8FAA8" box="[1287,1385,1375,1401]" pageId="20" pageNumber="287" type="holotype">holotype</typeStatus>
(
<quantity id="4CAE9B00E31AFFE71951FAADFF0CFA4C" metricMagnitude="-2" metricUnit="m" metricValue="3.048" pageId="20" pageNumber="287" unit="in" value="1.2">1.2 in</quantity>
<typeStatus id="54ED8847E31AFFE71C9DFA71FEB7FA4C" box="[180,278,1411,1437]" pageId="20" pageNumber="287" type="paratype">paratype</typeStatus>
) times longer than sixth somite, sixth somite 1.3 (1.1) times longer than fifth somite. Female pleon not known.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEFA39FEABF9FC" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
Male G1 (
<figureCitation id="136D2A60E31AFFE71D68FA39FE0BFA34" box="[321,426,1483,1509]" captionStart="FIGURE 13" captionStartId="21.[151,250,1943,1967]" captionTargetBox="[245,1347,186,1911]" captionTargetId="figure-19@21.[239,1349,181,1919]" captionTargetPageId="21" captionText="FIGURE 13. Ptychognathus ngankeeae sp. nov.: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod.All from the holotype (MNHN-IU-2019-411)." figureDoi="http://doi.org/10.5281/zenodo.12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="20" pageNumber="287">Fig. 13H</figureCitation>
) slender, 7.6 times as long as wide, slightly curving dorsally reaching suture between thoracic sternite 4 and 5; tip rounded, forming short chitinous structure; subdistal lobe obtuse, partially obscured by stiff setae.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEF9C4FEA0F9A4" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF9C4FE8BF981" bold="true" box="[199,298,1590,1616]" pageId="20" pageNumber="287">Habitat.</emphasis>
In
<collectingCountry id="F3417675E31AFFE71D70F9C5FE5BF980" box="[345,506,1591,1617]" name="Futuna Island" pageId="20" pageNumber="287">Futuna Island</collectingCountry>
, this species is found with
<taxonomicName id="4C564D66E31AFFE71F6CF9C5FC0EF980" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[837,943,1591,1617]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="20" pageNumber="287" phylum="Arthropoda" rank="species" species="similis" status="sp. nov.">
<emphasis id="B922EAF7E31AFFE71F6CF9C5FC0EF980" box="[837,943,1591,1617]" italics="true" pageId="20" pageNumber="287">P. similis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A211578CE31AFFE71F92F9C5FBB6F980" box="[955,1047,1591,1617]" pageId="20" pageNumber="287" rank="species">sp. nov.</taxonomicNameLabel>
in rivers in brackish water, near estuaries.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEF98CFACAF948" blockId="20.[151,1437,151,2013]" box="[199,1387,1662,1689]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF98CFE0BF949" bold="true" box="[199,426,1662,1688]" pageId="20" pageNumber="287">Colouration in life.</emphasis>
Body (
<figureCitation id="136D2A60E31AFFE71DD4F98DFDC0F948" box="[509,609,1663,1689]" captionStart="FIGURE 12" captionStartId="19.[151,250,1080,1104]" captionTargetBox="[151,1436,181,1057]" captionTargetId="figure-19@19.[151,1436,181,1057]" captionTargetPageId="19" captionText="FIGURE 12. Ptychognathus barbatus (A. Milne-Edwards, 1868): A, dorsal view of a living specimen from New Caledonia (MNHN-IU-2019-210); B, ventral view of the same; D, typical habitat of the species, Wadjana mouth of waterfall, New Caledonia. Ptychognathus ngankeeae sp. nov.: C, dorsal view of a living specimen from Futuna Island. Photo credits: V. de Mazancourt (A, B, D) and J. Poupin (C)." figureDoi="http://doi.org/10.5281/zenodo.12681774" httpUri="https://zenodo.org/record/12681774/files/figure.png" pageId="20" pageNumber="287">Fig. 12C</figureCitation>
) and chelipeds yellowish to brownish; inner surface of chela whitish.
</paragraph>
<paragraph id="8BE936E5E31AFFE71CEEF950FB86F96C" blockId="20.[151,1437,151,2013]" box="[199,1063,1698,1725]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF950FF5FF96D" bold="true" box="[199,254,1698,1724]" pageId="20" pageNumber="287">Size.</emphasis>
Small-sized. The largest male specimen examined is
<quantity id="4CAE9B00E31AFFE71F7FF951FC0DF96C" box="[854,940,1699,1725]" metricMagnitude="-3" metricUnit="m" metricValue="6.7" pageId="20" pageNumber="287" unit="mm" value="6.7">6.7 mm</quantity>
×
<quantity id="4CAE9B00E31AFFE71FE3F950FB82F96C" box="[970,1059,1698,1725]" metricMagnitude="-3" metricUnit="m" metricValue="5.8" pageId="20" pageNumber="287" unit="mm" value="5.8">5.8 mm</quantity>
.
</paragraph>
</subSubSection>
<subSubSection id="C34C656EE31AFFE71CEEF934FEAAF8D4" pageId="20" pageNumber="287" type="distribution">
<paragraph id="8BE936E5E31AFFE71CEEF934FEAAF8D4" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF934FEC0F931" bold="true" box="[199,353,1734,1760]" pageId="20" pageNumber="287">Distribution.</emphasis>
<taxonomicName id="4C564D66E31AFFE71D43F935FD30F930" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[362,657,1735,1761]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="20" pageNumber="287" phylum="Arthropoda" rank="species" species="ngankeeae" status="sp. nov.">
<emphasis id="B922EAF7E31AFFE71D43F935FD30F930" box="[362,657,1735,1761]" italics="true" pageId="20" pageNumber="287">Ptychognathus ngankeeae</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A211578CE31AFFE71EB3F935FD52F930" box="[666,755,1735,1761]" pageId="20" pageNumber="287" rank="species">sp. nov.</taxonomicNameLabel>
is apparently endemic to
<collectingCountry id="F3417675E31AFFE71836F935FB1BF930" box="[1055,1210,1735,1761]" name="Futuna Island" pageId="20" pageNumber="287">Futuna Island</collectingCountry>
(
<collectingCountry id="F3417675E31AFFE718E2F935FA3DF930" box="[1227,1436,1735,1761]" name="Wallis and Futuna" pageId="20" pageNumber="287">
Wallis and
<taxonomicName id="4C564D66E31AFFE71967F935FA3DF930" authority="Territory" authorityName="Territory" box="[1358,1436,1735,1761]" family="Gobiidae" genus="Akihito" kingdom="Animalia" order="Perciformes" pageId="20" pageNumber="287" phylum="Chordata" rank="species" species="futuna">Futuna</taxonomicName>
</collectingCountry>
Territory).
</paragraph>
</subSubSection>
<subSubSection id="C34C656EE31AFFE71CEEF8FDFA38F8F8" box="[199,1433,1807,1833]" pageId="20" pageNumber="287" type="etymology">
<paragraph id="8BE936E5E31AFFE71CEEF8FDFA38F8F8" blockId="20.[151,1437,151,2013]" box="[199,1433,1807,1833]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF8FDFEEFF8F8" bold="true" box="[199,334,1807,1833]" pageId="20" pageNumber="287">Etymology.</emphasis>
Named after our late colleague, Ngan Kee Ng, who devoted her life to the study of varunid crabs.
</paragraph>
</subSubSection>
<subSubSection id="C34C656EE31AFFE51CEEF8C1FA35FE90" lastPageId="22" lastPageNumber="289" pageId="20" pageNumber="287" type="discussion">
<paragraph id="8BE936E5E31AFFE71CEEF8C1FD45F80C" blockId="20.[151,1437,151,2013]" pageId="20" pageNumber="287">
<emphasis id="B922EAF7E31AFFE71CEEF8C1FE9AF89C" bold="true" box="[199,315,1843,1869]" pageId="20" pageNumber="287">Remarks.</emphasis>
<taxonomicName id="4C564D66E31AFFE71D6EF8C1FDD0F89C" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[327,625,1843,1869]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="20" pageNumber="287" phylum="Arthropoda" rank="species" species="ngankeeae" status="sp. nov.">
<emphasis id="B922EAF7E31AFFE71D6EF8C1FDD0F89C" box="[327,625,1843,1869]" italics="true" pageId="20" pageNumber="287">Ptychognathus ngankeeae</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A211578CE31AFFE71E55F8C1FD76F89C" box="[636,727,1843,1869]" pageId="20" pageNumber="287" rank="species">sp. nov.</taxonomicNameLabel>
is very similar to
<taxonomicName id="4C564D66E31AFFE71F90F8C1FADAF89C" authority="(A. Milne-Edwards, 1873)" baseAuthorityName="A. Milne-Edwards" baseAuthorityYear="1873" box="[953,1403,1843,1869]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="20" pageNumber="287" phylum="Arthropoda" rank="species" species="barbatus">
<emphasis id="B922EAF7E31AFFE71F90F8C1FB9CF89C" box="[953,1085,1843,1869]" italics="true" pageId="20" pageNumber="287">P. barbatus</emphasis>
(A.
<bibRefCitation id="EFC74B14E31AFFE71850F8C1FAD3F89C" author="Milne-Edwards, A." box="[1145,1394,1843,1869]" pageId="20" pageNumber="287" pagination="155 - 332" refId="ref18704" refString="Milne-Edwards, A. (1873) Recherches sur la faune carcinologique de la Nouvelle-Caledonie. Nouvelles Archives du Museum, 1 ere serie, 9, 155 - 332. https: // doi. org / 10.5962 / bhl. title. 10410" type="journal article" year="1873">Milne-Edwards, 1873</bibRefCitation>
)
</taxonomicName>
in morphology (see previously, under that species) but it can be distinguished by the absence of a pulvinus at base of fingers of the chelipeds and setae on ambulatory legs (dactylus with short and long setae on posterior margins, dorsal and ventral surface with no rows of short setae (vs dactylus with only dense short setae on posterior margins, dorsal and ventral surface with rows of short setae)).
</paragraph>
<caption id="DF29666DE31BFFE61CBEF865FAB0F805" ID-DOI="http://doi.org/10.5281/zenodo.12681776" ID-Zenodo-Dep="12681776" httpUri="https://zenodo.org/record/12681776/files/figure.png" pageId="21" pageNumber="288" startId="21.[151,250,1943,1967]" targetBox="[245,1347,186,1911]" targetPageId="21" targetType="figure">
<paragraph id="8BE936E5E31BFFE61CBEF865FAB0F805" blockId="21.[151,1436,1943,2004]" pageId="21" pageNumber="288">
<emphasis id="B922EAF7E31BFFE61CBEF865FE81F87E" bold="true" box="[151,288,1943,1967]" pageId="21" pageNumber="288">FIGURE 13.</emphasis>
<taxonomicName id="4C564D66E31BFFE61D0FF86AFD8EF861" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[294,559,1944,1968]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="21" pageNumber="288" phylum="Arthropoda" rank="species" species="ngankeeae" status="sp. nov.">
<emphasis id="B922EAF7E31BFFE61D0FF86AFD8EF861" box="[294,559,1944,1968]" italics="true" pageId="21" pageNumber="288">Ptychognathus ngankeeae</emphasis>
</taxonomicName>
<emphasis id="B922EAF7E31BFFE61E1FF86AFD26F861" bold="true" box="[566,647,1944,1968]" pageId="21" pageNumber="288">
<taxonomicNameLabel id="A211578CE31BFFE61E1FF86AFD26F861" box="[566,647,1944,1968]" pageId="21" pageNumber="288" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
: A, carapace; B, epistome; C, left third maxilliped; D, male cheliped; E, third pereiopod; F, fifth pereiopod; G, male pleon; H, left first gonopod. All from the holotype (MNHN-IU-2019-411).
</paragraph>
</caption>
<paragraph id="8BE936E5E318FFE51CEEFF65FD9CFECC" blockId="22.[151,1436,151,321]" pageId="22" pageNumber="289">
This new species is also similar to
<taxonomicName id="4C564D66E318FFE51E62FF65FC05FF60" authority="Hsu &amp; Shih, 2020" authorityName="Hsu &amp; Shih" authorityYear="2020" box="[587,932,151,177]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="22" pageNumber="289" phylum="Arthropoda" rank="species" species="stimpsoni">
<emphasis id="B922EAF7E318FFE51E62FF65FD70FF61" box="[587,721,151,176]" italics="true" pageId="22" pageNumber="289">P. stimpsoni</emphasis>
<bibRefCitation id="EFC74B14E318FFE51EF1FF65FC05FF60" author="Hsu, J. - W. &amp; Shih, H. - T." box="[728,932,151,177]" pageId="22" pageNumber="289" pagination="1 - 13" refId="ref17713" refString="Hsu, J. - W. &amp; Shih, H. - T. (2020) Diversity of Taiwanese brackish crabs Genus Ptychognathus Stimpson, 1958 (Crustacea: Brachyura: Varunidae) based on DNA barcode, with descriptions of two new species. Zoological Studies, 59, 1 - 13." type="journal article" year="2020">Hsu &amp; Shih, 2020</bibRefCitation>
</taxonomicName>
, in morphology, but they can be separated by the absence of a pulvinus at base of fingers of chelipeds (vs pulvinus present;
<bibRefCitation id="EFC74B14E318FFE5182DFF49FB6DFF04" author="Hsu, J. - W. &amp; Shih, H. - T." box="[1028,1228,187,213]" pageId="22" pageNumber="289" pagination="1 - 13" refId="ref17713" refString="Hsu, J. - W. &amp; Shih, H. - T. (2020) Diversity of Taiwanese brackish crabs Genus Ptychognathus Stimpson, 1958 (Crustacea: Brachyura: Varunidae) based on DNA barcode, with descriptions of two new species. Zoological Studies, 59, 1 - 13." type="journal article" year="2020">Hsu &amp; Shih 2020</bibRefCitation>
: fig. 4E) and setae on ambulatory legs (carpus of ambulatory legs glabrous on anterior margins (vs carpus covered with dense short setae;
<bibRefCitation id="EFC74B14E318FFE51CF7FEF1FE04FECC" author="Hsu, J. - W. &amp; Shih, H. - T." box="[222,421,259,285]" pageId="22" pageNumber="289" pagination="1 - 13" refId="ref17713" refString="Hsu, J. - W. &amp; Shih, H. - T. (2020) Diversity of Taiwanese brackish crabs Genus Ptychognathus Stimpson, 1958 (Crustacea: Brachyura: Varunidae) based on DNA barcode, with descriptions of two new species. Zoological Studies, 59, 1 - 13." type="journal article" year="2020">Hsu &amp; Shih 2020</bibRefCitation>
: figs. 4G, H).
</paragraph>
<paragraph id="8BE936E5E318FFE51CEEFED5FA35FE90" blockId="22.[151,1436,151,321]" box="[199,1428,295,321]" pageId="22" pageNumber="289">
<taxonomicName id="4C564D66E318FFE51CEEFED5FE4CFE90" authorityName="Mazancourt &amp; Mazel &amp; Marquet &amp; Poupin &amp; Keith" authorityYear="2024" box="[199,493,295,321]" class="Malacostraca" family="Varunidae" genus="Ptychognathus" kingdom="Animalia" order="Decapoda" pageId="22" pageNumber="289" phylum="Arthropoda" rank="species" species="ngankeeae" status="sp. nov.">
<emphasis id="B922EAF7E318FFE51CEEFED5FE4CFE90" box="[199,493,295,321]" italics="true" pageId="22" pageNumber="289">Ptychognathus ngankeeae</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A211578CE318FFE51DDAFED5FDEBFE90" box="[499,586,295,321]" pageId="22" pageNumber="289" rank="species">sp. nov.</taxonomicNameLabel>
seems to be less common in
<collectingCountry id="F3417675E318FFE51FB8FED5FC7EFE90" box="[913,991,295,321]" name="Wallis and Futuna" pageId="22" pageNumber="289">Futuna</collectingCountry>
than the next new species (see below).
</paragraph>
</subSubSection>
</treatment>
</document>
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