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<document ID-CLB-Dataset="97248" ID-DOI="http://dx.doi.org/10.3897/zse.98.83749" ID-GBIF-Dataset="0da5adb7-7e36-4f09-b681-b321476e83e9" ID-Pensoft-Pub="1860-0743-2-285" ID-Pensoft-UUID="54D98B2061E55F288C8BDEDCCA6EF32F" ID-ZooBank="5B12CCFC34744FBE8D4DCDB971D36085" ModsDocID="1860-0743-98-2-285" checkinTime="1657940650171" checkinUser="pensoft" docAuthor="Suklom, Anotai, Keetapithchayakul, Tosaphol Saetung, Abdul Rahim, Azman &amp; Wongkamhaeng, Koraon" docDate="2022" docId="025080BB8FAD556FBC7B83B30F78D9DB" docLanguage="en" docName="ZoosystEvol 98(2): 285-303" docOrigin="Zoosystematics and Evolution 98 (2)" docPubDate="2022-07-15" docSource="http://dx.doi.org/10.3897/zse.98.83749" docTitle="Floresorchestia amphawaensis Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng 2022, sp. nov." docType="treatment" docUuid="37893B87-E408-4CDE-A8FA-B1CA22047C1F" docUuidSource="ZooBank" docVersion="5" id="54D98B2061E55F288C8BDEDCCA6EF32F" lastPageNumber="285" masterDocId="54D98B2061E55F288C8BDEDCCA6EF32F" masterDocTitle="Two new species of the genus Floresorchestia (Crustacea, Amphipoda, Talitridae) from Amphawa Estuary, Samut Songkhram Province, Thailand" masterLastPageNumber="303" masterPageNumber="285" pageNumber="285" updateTime="1732938907823" updateUser="ExternalLinkService">
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<mods:title id="598BB4B726487D54EBB28F66B349C66A">Two new species of the genus Floresorchestia (Crustacea, Amphipoda, Talitridae) from Amphawa Estuary, Samut Songkhram Province, Thailand</mods:title>
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<mods:name id="C24E4DDCC3F1BE6190E010FF11BEA259" type="personal">
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<mods:namePart id="D7358E97EB04777E020E50144959D699">Suklom, Anotai</mods:namePart>
<mods:affiliation id="2C641792F4CADBE679EF49A00699927B">Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand</mods:affiliation>
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<mods:namePart id="36A8250892AA36C4974704761E1E8977">Keetapithchayakul, Tosaphol Saetung</mods:namePart>
<mods:nameIdentifier id="F8C6110FA6111867D159D0A74FE28507" type="ORCID">https://orcid.org/0000-0001-7565-4701</mods:nameIdentifier>
<mods:affiliation id="6CA48DC0BF3FB6110EE090F7FDD57ECB">Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand</mods:affiliation>
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<mods:namePart id="774CB9DD783027B5D761126F07483831">Abdul Rahim, Azman</mods:namePart>
<mods:nameIdentifier id="7D943E87707A7104FF034DAC094E747B" type="ORCID">https://orcid.org/0000-0002-8964-6638</mods:nameIdentifier>
<mods:affiliation id="0D48B8F2A9A328295FEF09660152F767">Marine Ecosystem Research Centre, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia</mods:affiliation>
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<mods:namePart id="81D5C0FAFFA4CEB3F5A4874FB58C4935">Wongkamhaeng, Koraon</mods:namePart>
<mods:nameIdentifier id="5384D3FE77035D9A12A6F5F5CAA66965" type="ORCID">https://orcid.org/0000-0001-7671-8869</mods:nameIdentifier>
<mods:affiliation id="06606F2A8F4A6675454D95129C6B9A2C">Department of Zoology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand</mods:affiliation>
<mods:nameIdentifier id="2CD0F1217F3F64FB1191E0DE2EE9E97F" type="email">koraon@gmail.com</mods:nameIdentifier>
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<mods:title id="CE13CE0FB1C9E83360E03B0F05F3194F">Zoosystematics and Evolution</mods:title>
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<mods:date id="EC282BEC7EFF8DD4DDE379C2CB54B0F2">2022</mods:date>
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<mods:number id="2703EBCE622445F9A4D6DE370B0A2E8C">98</mods:number>
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<treatment id="025080BB8FAD556FBC7B83B30F78D9DB" ID-GBIF-Taxon="197659184" LSID="urn:lsid:zoobank.org:act:37893B87-E408-4CDE-A8FA-B1CA22047C1F" httpUri="http://treatment.plazi.org/id/025080BB8FAD556FBC7B83B30F78D9DB" lastPageNumber="285" pageId="0" pageNumber="285" scope_family="Talitridae" scope_order="Amphipoda" scope_superFamily="Talitroidea">
<subSubSection id="C44C2DE894D7DF89FC99078FDBFA2272" pageId="0" pageNumber="285" type="nomenclature">
<paragraph id="0A7CB9A1B2444C1B6058FFE86190495B" pageId="0" pageNumber="285">
<taxonomicName id="6F454C079EBCBC8E877296DEC1AFED77" ID-CoL="9GDL7" LSID="https://zoobank.org/37893B87-E408-4CDE-A8FA-B1CA22047C1F" authority="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng, 2022" authorityName="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng" authorityYear="2022" class="Malacostraca" family="Talitridae" genus="Floresorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Floresorchestia amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis" status="sp. nov.">Floresorchestia amphawaensis</taxonomicName>
<taxonomicNameLabel id="2F3040D2702203887A62107CB2CB3DB8" pageId="0" pageNumber="285">sp. nov.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection id="783CCB4BCF1F6A665F9555FA680517E4" pageId="0" pageNumber="285" type="type material">
<paragraph id="075E6F0236C12537795CF3C2D7CEE9BB" pageId="0" pageNumber="285">Type material.</paragraph>
<paragraph id="0DC23C81663429C3EAD72629F1B729BC" pageId="0" pageNumber="285">
<emphasis id="619711E32741F4B92FE0A9DFECBB44CF" bold="true" pageId="0" pageNumber="285">
<emphasis id="EC83655F1DEF1AAAE7CDF531EF86597F" italics="true" pageId="0" pageNumber="285">Holotype</emphasis>
.
</emphasis>
♂, 7.8 mm, THNHM-lv-18763, THAILAND, Amphawa District, Samut Songkhram, Thailand (
<geoCoordinate id="37D2308C1124A9F46702296A0254146B" degrees="13" direction="north" minutes="26" orientation="latitude" precision="1" seconds="27.8" value="13.441055">13°26'27.8&quot;N</geoCoordinate>
,
<geoCoordinate id="B46AC6122FAA47E688288A50F8E87E56" degrees="99" direction="east" minutes="57" orientation="longitude" precision="1" seconds="41.3" value="99.96147">99°57'41.3&quot;E</geoCoordinate>
), 21 February 2021, Piyangkun Lueangjaroenkit; THNHM-lv-18764. Allotypes, ♀ collected with holotype; THNHM-lv-18764;
<emphasis id="8C9D33FB2170F61CD44FA93A86E0598C" bold="true" italics="true" pageId="0" pageNumber="285">Paratypes</emphasis>
5 ♂ and 10 ♀ collected with holotype; THNHM-lv-18765.
</paragraph>
</subSubSection>
<subSubSection id="63542714DF317942EF292908054FA040" pageId="0" pageNumber="285" type="type locality">
<paragraph id="1C9E36EE38BCA4C11E35FD2725E16D31" pageId="0" pageNumber="285">Type locality.</paragraph>
<paragraph id="C35E3193E19D8955F9E8296240FEC018" pageId="0" pageNumber="285">
man-made ditch in coconut plantation, Amphawa District, Samut Songkhram, Thailand (
<geoCoordinate id="65A0D047D0A4E5AC2782529A0698B4D7" degrees="13" direction="north" minutes="26" orientation="latitude" precision="1" seconds="27.8" value="13.441055">13°26'27.8&quot;N</geoCoordinate>
,
<geoCoordinate id="6007150665BD43ADE11E4DEACBDF5246" degrees="99" direction="east" minutes="57" orientation="longitude" precision="1" seconds="41.3" value="99.96147">99°57'41.3&quot;E</geoCoordinate>
).
</paragraph>
</subSubSection>
<subSubSection id="A191B4973CAE623D414D66505A7941BC" pageId="0" pageNumber="285" type="habitat">
<paragraph id="6175FF627702A0C7CCD292080BC6E66F" pageId="0" pageNumber="285">Habitat.</paragraph>
<paragraph id="1EF35D1AD98BE4DCDD55E52BB8BA650A" pageId="0" pageNumber="285">Riparian-hoppers living near agricultural and urban areas in Amphawa District.</paragraph>
</subSubSection>
<subSubSection id="DC7C82FA9522A8C45A4D4ED5C3855552" pageId="0" pageNumber="285" type="etymology">
<paragraph id="F92CF22A292B5A1959F81C8358726E0A" pageId="0" pageNumber="285">Etymology.</paragraph>
<paragraph id="9820350A5D95E44769308EBC8C5D471C" pageId="0" pageNumber="285">Named for the District of Samut Songkhram, Thailand where the species occurs.</paragraph>
</subSubSection>
<subSubSection id="426460B306FF3F9439801ED6C79B62E1" pageId="0" pageNumber="285" type="ecological type">
<paragraph id="8C506EE6CDBC1498EA79D3C94F2D80E0" pageId="0" pageNumber="285">Ecological type.</paragraph>
<paragraph id="017F91E1D499F3120186251D664C5FAE" pageId="0" pageNumber="285">Riparian-hoppers (edges of lakes under stones or in very wet vegetation, near (or in) streams, rivers, creeks, cascades and waterfalls).</paragraph>
</subSubSection>
<subSubSection id="1CC598D908A5B27189C1F449F2A55EEA" pageId="0" pageNumber="285" type="description">
<paragraph id="9BBAD911176251A0C394162FC5D2E562" pageId="0" pageNumber="285">Description.</paragraph>
<paragraph id="0FC1D4C1851A12D24212BF76AEE30AED" pageId="0" pageNumber="285">Based on holotype, male, 7.8 mm, THNHM-lv-18763.</paragraph>
<paragraph id="28B5065A21469F65526DE7F43F0DC886" pageId="0" pageNumber="285">
<emphasis id="D798CBC22337B7170FDF6272BCCCDCA6" bold="true" italics="true" pageId="0" pageNumber="285">Head</emphasis>
(Fig.
<figureCitation id="B0388C0D1284FD35511E4AA2DA3669F4" captionStart="Figure 3" captionStartId="F3" captionText="Figure 3. Male habitus of Floresorchestia spp. FA. F. amphawaensis sp. nov. holotype, male, 7.8 mm (THNHM-lv- 18763), Amphawa District, Samut Songkhram, Thailand; FP. F. pongrati sp. nov. holotype, male, 10 mm (THNHM-lv- 19369), Amphawa District, Samut Songkhram, Thailand. Scale bars: 1 mm (FA, FP)." figureDoi="10.3897/zse.98.83749.figure3" httpUri="https://binary.pensoft.net/fig/715690" pageId="0" pageNumber="285">3FA</figureCitation>
)
<emphasis id="9E2C5A769A10709EA7C5B494D904FBAF" bold="true" italics="true" pageId="0" pageNumber="285">Eye</emphasis>
large (greater than 1/2 the length of the head).
<emphasis id="4B71FBFAA7FC0436BE4F3F0994555F37" bold="true" italics="true" pageId="0" pageNumber="285">Antenna 1</emphasis>
(Fig.
<figureCitation id="15D26E15699643E2F4C6D09A5E1A5474" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (A 1, A 2, G 2); 0.5 mm (G 1)." figureDoi="10.3897/zse.98.83749.figure4" httpUri="https://binary.pensoft.net/fig/715691" pageId="0" pageNumber="285">4A1</figureCitation>
) short, rarely longer than article 4 of antenna 2 peduncle.
<emphasis id="C1B28591FCB3E270BE30C5DD23DF6C9E" bold="true" italics="true" pageId="0" pageNumber="285">Antenna 2</emphasis>
(Fig.
<figureCitation id="A9EC782BC6DA2014E6EF6D3E9BAAD620" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (A 1, A 2, G 2); 0.5 mm (G 1)." figureDoi="10.3897/zse.98.83749.figure4" httpUri="https://binary.pensoft.net/fig/715691" pageId="0" pageNumber="285">4A2</figureCitation>
) shorter than half body length; peduncular article slender; article 3 shortest; article 5 longer than article 4; flagellum with 13 articles, final article cone-shaped with an apical cluster of setae.
</paragraph>
<paragraph id="E48C17D2D26CDB3A054CBB0AB5265A35" pageId="0" pageNumber="285">
<emphasis id="9461442B1EC1BFB9AF65FCADEE49AF70" bold="true" italics="true" pageId="0" pageNumber="285">Upper lip</emphasis>
(Fig.
<figureCitation id="B96FB1A03B70E1C716D2642CE6D42C7F" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5UL</figureCitation>
) broad, deep, apex rounded, without robust setae.
<emphasis id="F595ABB5A84B63D9275824AF1C392150" bold="true" italics="true" pageId="0" pageNumber="285">Lower lip</emphasis>
(Fig.
<figureCitation id="D87D5FC753552544F89E09925466ADF8" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5LL</figureCitation>
) present; without inner plates.
<emphasis id="71CAADBE9C47CD229FE92CCB2CD532A0" bold="true" italics="true" pageId="0" pageNumber="285">Left mandible</emphasis>
(Fig.
<figureCitation id="918AA56417B364834743A48727D1D02F" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5LMD</figureCitation>
) incisor 6-dentate; lacinia mobilis 4-dentate and four plumose setae in one row; molar strong with 16 striations and one plumose seta.
<emphasis id="C69926BCE6957D6B8AAB4B6009ECEE3F" bold="true" italics="true" pageId="0" pageNumber="285">Right mandible</emphasis>
(Fig.
<figureCitation id="2A8640B79DF136553ACFF6A7DBE6F690" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5RMD</figureCitation>
) incisor 5-dentate; lacinia mobilis with numerous cusps, group of three robust setae and cluster of fine setae; molar strong with 18 striations and one plumose seta.
<emphasis id="F6E0301AF6AE18E1E2C867BA3E02B6BD" bold="true" italics="true" pageId="0" pageNumber="285">Maxilla 1</emphasis>
(Fig.
<figureCitation id="64BEAB9FE787C3096AFA5F6761404024" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5MX1</figureCitation>
) inner plate slender with two terminal plumose setae; outer plate with seven robust serrated setae; with small 1-articulate palp.
<emphasis id="930A9FB08BAAA113068A5A88BFBEACAC" bold="true" italics="true" pageId="0" pageNumber="285">Maxilla 2</emphasis>
(Fig.
<figureCitation id="68B35C35725FB2BCF7F17E3437AF60D0" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5MX2</figureCitation>
) plates narrow, inner plate slightly shorter than outer; with 14 subapical robust setae, one plumose seta and 9 facial setae; outer plate with 18 apical robust setae in two rows and five simple setae in outer corner.
<emphasis id="A2F29A032AC2707B8F9A8E2BE45FF1CA" bold="true" italics="true" pageId="0" pageNumber="285">Maxilliped</emphasis>
(Fig.
<figureCitation id="4271A74A574453632B0320B9C67E8DF1" captionStart="Figure 5" captionStartId="F5" captionText="Figure 5. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (LL, LMD, MP, MX 1 - 2, RMD, UL)." figureDoi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285">5MP</figureCitation>
) inner plate apical and subapical margins with plumose setae, robust setae and two large conical robust setae; outer plate with two rows subapical setae and plumose setae; palp article 2 distomedial lobe well developed with numerous setae; article 4 reduced, button-shaped.
</paragraph>
<paragraph id="642252D928FE294C122094478640B899" pageId="0" pageNumber="285">
<emphasis id="787AB4458EC920746A3C3363D8E7D80D" bold="true" pageId="0" pageNumber="285">
<emphasis id="3AAA3BC6546E30C9A8D526374E016D51" italics="true" pageId="0" pageNumber="285">Pereon</emphasis>
.
</emphasis>
(Figs
<figureCitation id="396194D304EDA9603913571D44B4A338" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (A 1, A 2, G 2); 0.5 mm (G 1)." figureDoi="10.3897/zse.98.83749.figure4" httpUri="https://binary.pensoft.net/fig/715691" pageId="0" pageNumber="285">4</figureCitation>
,
<figureCitation id="C391C263D9041DC49180DE0B48BD421B" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6</figureCitation>
)
<emphasis id="92FF7B2486B187DEECDEE2083547D8D1" bold="true" italics="true" pageId="0" pageNumber="285">Gnathopod 1</emphasis>
(Fig.
<figureCitation id="C21D6CFC485EC7BFAF48E50074F7C42A" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (A 1, A 2, G 2); 0.5 mm (G 1)." figureDoi="10.3897/zse.98.83749.figure4" httpUri="https://binary.pensoft.net/fig/715691" pageId="0" pageNumber="285">4G1</figureCitation>
) sexually dimorphic; subchelate, coxa smaller than coxa 2, ventral margin lined with five robust setae, anterior margin straight; basis expanded posteriorly, anterior margin with four setae, posterodistal margin with two setae; posterior of merus, carpus and propodus each with lobe covered in palmate setae; carpus 1.5
<normalizedToken id="6733F244BA2E66A391CAD13B21C7BB9F" originalValue="×">x</normalizedToken>
longer than propodus, anterior margin with two robust setae, posterior margin with four robust setae; propodus subtriangular with well-developed posterior lobe, anterior side with three groups of coupled robust setae, posterior margin with five robust setae, palm slightly serrated, lined with nine robust setae; dactylus cuspidactylate, shorter than palm.
</paragraph>
<paragraph id="7E357889CFD22616FC5620A436EBA44C" pageId="0" pageNumber="285">
<emphasis id="AFBDCD0337F1954A6B38E280D281F1B0" bold="true" italics="true" pageId="0" pageNumber="285">Gnathopod 2</emphasis>
(Fig.
<figureCitation id="974A2536FD0764BA0CE343D708456689" captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (A 1, A 2, G 2); 0.5 mm (G 1)." figureDoi="10.3897/zse.98.83749.figure4" httpUri="https://binary.pensoft.net/fig/715691" pageId="0" pageNumber="285">4G2</figureCitation>
) sexually dimorphic; subchelate; coxa anterior margin with two setae and ventral margin with seven setae; basis anterior margin smooth, slightly expanded, posterior margin with three robust setae; ischium with rounded lobe on anterior margin; posterior of merus, carpus and propodus glabrous; carpus triangular, reduced, enclosed by merus and propodus, posterior lobe absent; propodus subovate, 1.4
<normalizedToken id="36F155504D9E4F8CEA5E8F0022D1B8EF" originalValue="×">x</normalizedToken>
as long as wide, palm reaching about 34%, posteromedial surface of propodus with groove, anterior side naked, palm lined with 11 robust setae; dactylus longer than palm fitted with facial groove, attenuated distally.
</paragraph>
<paragraph id="EEDDBE4A90C79CE85D3C7AF91B159A5C" pageId="0" pageNumber="285">
<emphasis id="D6A99F600F5047FD25FFC9B51E37359F" bold="true" italics="true" pageId="0" pageNumber="285">Pereopod 3</emphasis>
(Fig.
<figureCitation id="2933D8AB8C8367A1471D75097FA8B727" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6P3</figureCitation>
) coxa longer than broad with posterior process, anterior margin with seven robust setae; basis slightly expanded, anterior margin with three robust setae, posterior margin with three robust setae; ischium shortest; merus longer than ischium, anterior and posterior margin of merus lined with clusters of robust setae; carpus and propodus slightly expanded; carpus posterior margin with cluster of robust setae; dactylus without notch on posterior margin.
</paragraph>
<paragraph id="ADCD292206F0B6649921D0942CDB4B20" pageId="0" pageNumber="285">
<emphasis id="CE8FFD4CB6D9D3F69F25A5313DBFE799" bold="true" italics="true" pageId="0" pageNumber="285">Pereopod 4</emphasis>
(Fig.
<figureCitation id="5E6F593745092364B1F4688737C6B315" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6P4</figureCitation>
) slightly shorter than pereopod 3; coxa longer than broad, anterior margin with five robust setae and with small posterior process; basis longest, posterior margin with three robust setae; ischium shortest, posterodistal with two robust setae; merus and carpus shorter than those of pereopod 3; merus distally expanded, longer than carpus and propodus, anterior and posterior margin with five robust setae; carpus shorter than propodus posterior margin with three clusters of robust setae; propodus slender, with three clusters of robust setae in posterior side; dactylus slender and longer than that of pereopod 3, thickened proximally with a notch along posterior margin.
</paragraph>
<paragraph id="03A4914677BAC200EE4DA9793D089D7A" pageId="0" pageNumber="285">
<emphasis id="4A37CAEDECCB92F937213C372233324C" bold="true" italics="true" pageId="0" pageNumber="285">Pereopod 5</emphasis>
(Fig.
<figureCitation id="4D7FC561D0DD9E2171E5B86CA5741DC9" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6P5</figureCitation>
) coxa bilobed, anterior lobe distinctly large than posterior lobe; basis anterior margin with five robust setae, posterior margin with row of tiny setae; merus and carpus distally expanded; carpus shorter than propodus; propodus slender, longer than merus and carpus.
</paragraph>
<paragraph id="753FACE0B6A619461C640700326109C7" pageId="0" pageNumber="285">
<emphasis id="4E83CDEEBB8D429D9329E5DB0D86FCC1" bold="true" italics="true" pageId="0" pageNumber="285">Pereopod 6</emphasis>
(Fig.
<figureCitation id="6F71A35B4EC565A8F6B239904347D449" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6P6</figureCitation>
) coxa bilobed, posterior lobe larger than anterior; basis expanded, anterior margin with 10 robust setae, posterior margin with row of tiny setae; ischium shortest; merus distally expanded, anterior side with four clusters of robust setae; carpus expanded less than merus, anterior margin lined with four clusters of robust setae; propodus slender, longer than merus and carpus; dactylus slender with subapical robust setae.
</paragraph>
<paragraph id="E896D04619F93BA0B563ADB057776846" pageId="0" pageNumber="285">
<emphasis id="51987B01929F0F514C7A742008945C06" bold="true" italics="true" pageId="0" pageNumber="285">Pereopod 7</emphasis>
(Fig.
<figureCitation id="CB8400F58B797109FF23E125B026FD55" captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.25 mm (P 3 - P 7)." figureDoi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285">6P7</figureCitation>
) coxa reduced; posterior margin of basis with distinct minute serration (each serrate with small seta), anterior margin with 10 robust setae; merus and carpus slightly expanded; propodus longer than each merus and carpus; dactylus slender with subapical robust setae.
</paragraph>
<paragraph id="E2A35337B06F972117A96419F97D3C82" pageId="0" pageNumber="285">
<emphasis id="92F70854C08EEC686897B411CA3621D9" bold="true" pageId="0" pageNumber="285">
<emphasis id="90E54E8E86139839791C2CDA961BA4CC" italics="true" pageId="0" pageNumber="285">Pleon</emphasis>
.
</emphasis>
(Fig.
<figureCitation id="9BC71899DC148F1EA5C77F547EDF9691" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7</figureCitation>
) Pleopods all well developed.
<emphasis id="5E431B1037ED7E5090F3A6ADD814FDBE" bold="true" italics="true" pageId="0" pageNumber="285">Pleopod 1</emphasis>
(Fig.
<figureCitation id="9F7F7469E0DCDE3E5D67A65ED57D60D9" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7PL1</figureCitation>
) peduncle without marginal setae; biramous, outer ramus subequal in length to peduncle; inner ramus with 11 articles; outer ramus with seven articles.
<emphasis id="EAC0FB49198AE212F6B7CED136B3DEB2" bold="true" italics="true" pageId="0" pageNumber="285">Pleopod 2</emphasis>
(Fig.
<figureCitation id="5D50B5C83911B2BC4D3177DC63E6FA84" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7PL2</figureCitation>
) peduncle without marginal setae; biramous, inner ramus subequal to outer ramus, shorter than peduncle; inner ramus with seven articles; outer ramus with six articles.
<emphasis id="D21260B8FB0B90FC3C22819BCAE9B945" bold="true" italics="true" pageId="0" pageNumber="285">Pleopod 3</emphasis>
(Fig.
<figureCitation id="4B5F137F8C8DADD19D79B9A6DB9E844A" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7PL3</figureCitation>
) peduncle without marginal setae; biramous, inner ramus subequal to outer ramus, shorter than peduncle; inner ramus with nine articles; outer ramus more than six articles.
</paragraph>
<paragraph id="8B6576051377B36D766A23D65D31FA3C" pageId="0" pageNumber="285">
<emphasis id="855CC17A4D4757BD42B56B6453E17EBB" bold="true" italics="true" pageId="0" pageNumber="285">Epimera</emphasis>
(Fig.
<figureCitation id="EBEFB5027B862B8CF225C906186D5C6A" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7EP</figureCitation>
),
<emphasis id="81405EAFFF40BE7E3368E4F244A82297" bold="true" italics="true" pageId="0" pageNumber="285">Epimeron 1</emphasis>
posterodistal corner slightly protruding, without slit.
<emphasis id="9A1E1FD9CE62DE0FCC4D8224D85CF4AB" bold="true" italics="true" pageId="0" pageNumber="285">Epimera 2</emphasis>
and
<emphasis id="6245F1910E5E594C2DF14FE2341C47B3" bold="true" italics="true" pageId="0" pageNumber="285">3</emphasis>
each with slits above ventral margin, with 21 and 10 slits, respectively.
<emphasis id="9B3EF1871E0798918FB9EF1562725C30" bold="true" italics="true" pageId="0" pageNumber="285">Epimeron 3</emphasis>
posteroventral corner and ventral margin smooth.
</paragraph>
<paragraph id="D90489CE02793153CA9A2DFCA2C2B35C" pageId="0" pageNumber="285">
<emphasis id="02EF93CEBFEC72158140127621786992" bold="true" italics="true" pageId="0" pageNumber="285">Uropod 1</emphasis>
(Fig.
<figureCitation id="6EDD2A9D0FDF05DA92F6A4BA8754DED7" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7U1</figureCitation>
) peduncle with four robust setae in one row; inner ramus subequal in length to outer ramus, inner ramus with five marginal robust setae, apical with three robust setae; outer ramus without marginal robust setae, apical with three robust setae.
<emphasis id="FE5E515D6DE58F3C20101055634D7EB0" bold="true" italics="true" pageId="0" pageNumber="285">Uropod 2</emphasis>
(Fig.
<figureCitation id="98A1A0B962CEB86404FF424C8B96FB91" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7U2</figureCitation>
) peduncle with three robust setae; inner ramus subequal in length to outer ramus; inner ramus with two marginal robust setae, apical with four robust setae; outer ramus with one marginal robust seta, apical with two robust setae.
<emphasis id="F7208DC3190091206F65B62278F81B33" bold="true" italics="true" pageId="0" pageNumber="285">Uropod 3</emphasis>
(Fig.
<figureCitation id="3F4376A2237B69593D4FA2CEE70A5FCD" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7U3</figureCitation>
) uniramous, peduncle with four robust setae; ramus subequal to peduncle, without marginal robust setae and three apical robust setae.
</paragraph>
<paragraph id="97CBCAA7E8875EAEA930FFAE8B1F2C96" pageId="0" pageNumber="285">
<emphasis id="5F91C8AC117A9537BD44EB5390935802" bold="true" italics="true" pageId="0" pageNumber="285">Telson</emphasis>
(Fig.
<figureCitation id="4EB4AFACDD735A811596B7359606BB9A" captionStart="Figure 7" captionStartId="F7" captionText="Figure 7. Floresorchestia amphawaensis sp. nov. holotype. Scale bars: 0.1 mm (PL 1 - PL 3, U 1, U 2); 0.2 mm (EP, TL, U 3)." figureDoi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285">7TL</figureCitation>
) as long as broad, weakly cleft, dorsal mid-line at least halfway, with one marginal, three apical robust setae and two plumose setae.
</paragraph>
<paragraph id="97FC93C0143CAD921CCC22327CF4CDC4" pageId="0" pageNumber="285">
<emphasis id="AABA609421EC2237490FAC0870ABE993" bold="true" pageId="0" pageNumber="285">Female (Sexually dimorphic characters)</emphasis>
(Fig.
<figureCitation id="27283512BD0496070B908CC95ABCC6DF" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Floresorchestia amphawaensis sp. nov. allotype, female 8.9 mm (THNHM-Iv- 18764) Amphawa District, Samut Songkhram, Thailand. Scale bars: 0.25 mm (G 1, G 2, TL); 1 mm for habitus." figureDoi="10.3897/zse.98.83749.figure8" httpUri="https://binary.pensoft.net/fig/715695" pageId="0" pageNumber="285">8</figureCitation>
).
<emphasis id="EB3D4C35CA07C76113C83A553658B55C" bold="true" pageId="0" pageNumber="285">
<emphasis id="AA41323259734D6709E0AA9FAF2C01AF" italics="true" pageId="0" pageNumber="285">Type</emphasis>
.
</emphasis>
Allotype, female, 8.9 mm, THNHM-lv-18764.
</paragraph>
<paragraph id="94DAC19D3C10718FFBB53F6373684712" pageId="0" pageNumber="285">
<emphasis id="AF702DD2C338939DD6917A2E37ABD904" bold="true" pageId="0" pageNumber="285">
<emphasis id="8F1D0CF88712500EC5C0D8C4B3FAB3A3" italics="true" pageId="0" pageNumber="285">Pereon</emphasis>
.
<emphasis id="5771698298FAD83E5496634BF10ACCA0" italics="true" pageId="0" pageNumber="285">Gnathopod 1</emphasis>
</emphasis>
(Fig.
<figureCitation id="FDC7600B5C6FCAD0C09D86C6156E31F0" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Floresorchestia amphawaensis sp. nov. allotype, female 8.9 mm (THNHM-Iv- 18764) Amphawa District, Samut Songkhram, Thailand. Scale bars: 0.25 mm (G 1, G 2, TL); 1 mm for habitus." figureDoi="10.3897/zse.98.83749.figure8" httpUri="https://binary.pensoft.net/fig/715695" pageId="0" pageNumber="285">8G1</figureCitation>
) merus lacking tumescent lobe, posterior margin with three robust setae; propodus without tumescent protuberance, anterior margin with three clusters of robust setae, posterior margin with six robust setae; palm slightly transverse, dactylus inner lateral posterior margin with four robust setae.
</paragraph>
<paragraph id="08F2B3D15D58622AFEF8CFD482851EB0" pageId="0" pageNumber="285">
<emphasis id="3E7C114ADE79FE069630FAA8792A11D9" bold="true" italics="true" pageId="0" pageNumber="285">Gnathopod 2</emphasis>
(Fig.
<figureCitation id="EBD4FE778D13957694A52DAF31A6DA4A" captionStart="Figure 8" captionStartId="F8" captionText="Figure 8. Floresorchestia amphawaensis sp. nov. allotype, female 8.9 mm (THNHM-Iv- 18764) Amphawa District, Samut Songkhram, Thailand. Scale bars: 0.25 mm (G 1, G 2, TL); 1 mm for habitus." figureDoi="10.3897/zse.98.83749.figure8" httpUri="https://binary.pensoft.net/fig/715695" pageId="0" pageNumber="285">8G2</figureCitation>
) mitten-shaped; posterior margin of carpus and propodus each with lobe covered in palmate setae; carpus well developed, posterior lobe projecting between merus and propodus; nearly twice as long as wide; palm obtuse, lined with 10 robust setae, posterodistal corner with two robust setae; dactylus not modified distally, blunt.
</paragraph>
<caption id="06CF1FDAD9575C77A0239E0C42B4332C" doi="10.3897/zse.98.83749.figure5" httpUri="https://binary.pensoft.net/fig/715692" pageId="0" pageNumber="285" start="Figure 5" startId="F5">
<paragraph id="502F0500ED8935230856765EC24B3FF2" pageId="0" pageNumber="285">
<emphasis id="D99EBE7134541BFC13B41B383CFDF521" bold="true" pageId="0" pageNumber="285">Figure 5.</emphasis>
<taxonomicName id="9DE4707A29366C6CE7236FE327F953D8" authorityName="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng" authorityYear="2022" class="Malacostraca" family="Talitridae" genus="Floresorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Floresorchestia amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis">
<emphasis id="A7AF9910293A17B23E26CE908E158058" italics="true" pageId="0" pageNumber="285">Floresorchestia amphawaensis</emphasis>
</taxonomicName>
sp. nov. holotype. Scale bars: 0.1 mm (
<emphasis id="714275D2E20362372DF58CA839AE12D4" bold="true" pageId="0" pageNumber="285">LL, LMD, MP, MX1-2, RMD, UL</emphasis>
).
</paragraph>
</caption>
<caption id="31DD3276943E6CA8128A6026E3D48F2C" doi="10.3897/zse.98.83749.figure6" httpUri="https://binary.pensoft.net/fig/715693" pageId="0" pageNumber="285" start="Figure 6" startId="F6">
<paragraph id="B63073FC42046F633FF8130814942212" pageId="0" pageNumber="285">
<emphasis id="09D89BCEE47801105399C400D2DB3CA6" bold="true" pageId="0" pageNumber="285">Figure 6.</emphasis>
<taxonomicName id="F0AE1E636FC3D4EC6FD7DB17103C81A0" authorityName="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng" authorityYear="2022" class="Malacostraca" family="Talitridae" genus="Floresorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Floresorchestia amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis">
<emphasis id="4D9BD9C00429E8FF0966A2E03B234A65" italics="true" pageId="0" pageNumber="285">Floresorchestia amphawaensis</emphasis>
</taxonomicName>
sp. nov. holotype. Scale bars: 0.25 mm (
<emphasis id="6DC7E31E7EAB49175D4C67A410B5C208" bold="true" pageId="0" pageNumber="285">P3-P7</emphasis>
).
</paragraph>
</caption>
<caption id="854E3391099E69D4F899B9E9A45A4E19" doi="10.3897/zse.98.83749.figure7" httpUri="https://binary.pensoft.net/fig/715694" pageId="0" pageNumber="285" start="Figure 7" startId="F7">
<paragraph id="D9A037215B5F5877DD6B4D1DB23D547D" pageId="0" pageNumber="285">
<emphasis id="A06F26E780BC15AB88199F4903D9C631" bold="true" pageId="0" pageNumber="285">Figure 7.</emphasis>
<taxonomicName id="0C09AABEEAD61C0C13487200FA26A045" authorityName="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng" authorityYear="2022" class="Malacostraca" family="Talitridae" genus="Floresorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Floresorchestia amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis">
<emphasis id="AEB808AC2A85BB6BF9FF45BC810B8C7C" italics="true" pageId="0" pageNumber="285">Floresorchestia amphawaensis</emphasis>
</taxonomicName>
sp. nov. holotype. Scale bars: 0.1 mm (
<emphasis id="B228BDDFD361B48E78592A263CFEC6A9" bold="true" pageId="0" pageNumber="285">PL1-PL3, U1, U2</emphasis>
); 0.2 mm (
<emphasis id="C4D5BC4AEE24B7552332659D99D343E3" bold="true" pageId="0" pageNumber="285">EP, TL, U3</emphasis>
).
</paragraph>
</caption>
</subSubSection>
<subSubSection id="4B5AFDD8F36DF2B5FC090322F6E93520" pageId="0" pageNumber="285" type="remarks">
<paragraph id="46F0905817D88F30C7A35999029457A6" pageId="0" pageNumber="285">Remarks.</paragraph>
<paragraph id="1076BC1C8145318667BCE6F1D26FA70D" pageId="0" pageNumber="285">
<taxonomicName id="63FBE5FAB1BB8E0D69C9EE2B7696AB67" authorityName="Suklom &amp; Keetapithchayakul &amp; Abdul Rahim &amp; Wongkamhaeng" authorityYear="2022" class="Malacostraca" family="Talitridae" genus="Floresorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Floresorchestia amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis">
<emphasis id="AEF87BDD2D3A93AAD2587ADFB088CA38" italics="true" pageId="0" pageNumber="285">Floresorchestia amphawaensis</emphasis>
</taxonomicName>
sp. nov. is similar to
<taxonomicName id="BFAADF1B89FA54CC34EA0BD7EE02956D" class="Malacostraca" kingdom="Animalia" lsidName="F. malayensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="malayensis">
<emphasis id="6890020D56EE15160E9E74DB76FCD9C5" italics="true" pageId="0" pageNumber="285">F. malayensis</emphasis>
</taxonomicName>
with which they share characteristics such as: (1) left mandible lacinia mobilis with 4-dentate; (2) gnathopod 1 carpus longer by 1.5
<normalizedToken id="4FE130D49A9378C3852BDDECF874DA1B" originalValue="×">x</normalizedToken>
than propodus; (3) gnathopod 2 dactylus posterior margin smooth; (4) gnathopod 2 propodus 1.4
<normalizedToken id="1AA9260A8F14EB9D1CEBE8C5AB5ABF43" originalValue="×">x</normalizedToken>
as long as wide; (5) uropod 1 peduncle with 4-6 robust setae; (6) uropod 3 ramus without marginal setae; (7) telson with four robust setae per lobe; (8) epimera 2-3 with slits. However,
<taxonomicName id="80BAF3A14319675606752A27C888C065" class="Malacostraca" kingdom="Animalia" lsidName="F. amphawaensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="amphawaensis">
<emphasis id="4108F06D50EE10652CD854E85C6FC15A" italics="true" pageId="0" pageNumber="285">F. amphawaensis</emphasis>
</taxonomicName>
sp. nov. may be distinguished from
<taxonomicName id="6B9C5F90DA33C5A309E21789B646D966" class="Malacostraca" kingdom="Animalia" lsidName="F. malayensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="malayensis">
<emphasis id="B03BB6FF68B10E2E70103DBA14B7A1B9" italics="true" pageId="0" pageNumber="285">F. malayensis</emphasis>
</taxonomicName>
by the following [Characters of
<taxonomicName id="B9413040A0C71689439844313B761F5B" class="Malacostraca" kingdom="Animalia" lsidName="F. malayensis" order="Amphipoda" pageId="0" pageNumber="285" phylum="Arthropoda" rank="species" species="malayensis">
<emphasis id="06921EB8E568DADB59C6EB7E175BB443" italics="true" pageId="0" pageNumber="285">F. malayensis</emphasis>
</taxonomicName>
in brackets]: (1) gnathopod 2 palm reaching 34% [palm reaching 30%]; (2) uropod 1 inner ramus with five marginal setae [four marginal setae]; (3) uropod 1 peduncle with four robust setae [with five robust setae]; (4) uropod 3 peduncle with four robust setae [two robust setae]; (5) telson slightly longer than broad [broader than long].
</paragraph>
</subSubSection>
</treatment>
</document>