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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.705.15045" ID-GBIF-Dataset="46f4590e-f837-43ed-a2d7-db0d755a4dde" ID-PMC="PMC5674036" ID-Pensoft-Pub="1313-2970-705-15" ID-PubMed="29118610" ID-ZBK="0287425B2E32471CA5B40E6A2C7B78E4" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-705-15" ModsDocOrigin="ZooKeys 705" ModsDocTitle="A new terrestrial talitrid genus, Myanmarorchestia, with two new species from Myanmar (Crustacea, Amphipoda, Talitridae)" checkinTime="1507008888299" checkinUser="pensoft" docAuthor="Hou, Zhonge &amp; Zhao, Shuangyan" docDate="2017" docId="91D41E92C24E7B8A99476D9661E3DBB9" docLanguage="en" docName="ZooKeys 705: 15-39" docOrigin="ZooKeys 705" docSource="http://dx.doi.org/10.3897/zookeys.705.15045" docTitle="Myanmarorchestia Hou, gen. n." docType="treatment" docUuid="4EF3E7E6-3D4C-40A3-B294-3E79DB0D2EE2" docUuidSource="ZooBank" docVersion="5" lastPageNumber="17" masterDocId="0E5BFF9BA03F332D6F3CFF90FFCAFFC8" masterDocTitle="A new terrestrial talitrid genus, Myanmarorchestia, with two new species from Myanmar (Crustacea, Amphipoda, Talitridae)" masterLastPageNumber="39" masterPageNumber="15" pageNumber="16" updateTime="1668164879401" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>A new terrestrial talitrid genus, Myanmarorchestia, with two new species from Myanmar (Crustacea, Amphipoda, Talitridae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Hou, Zhonge</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Zhao, Shuangyan</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2017</mods:date>
<mods:detail type="volume">
<mods:number>705</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>15</mods:start>
<mods:end>39</mods:end>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.705.15045</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.705.15045</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-705-15</mods:identifier>
<mods:identifier type="ZBK">0287425B2E32471CA5B40E6A2C7B78E4</mods:identifier>
<mods:identifier type="ZooBank">0287425B2E32471CA5B40E6A2C7B78E4</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="135097350" LSID="urn:lsid:zoobank.org:act:4EF3E7E6-3D4C-40A3-B294-3E79DB0D2EE2" httpUri="http://treatment.plazi.org/id/91D41E92C24E7B8A99476D9661E3DBB9" lastPageId="3" lastPageNumber="17" pageId="1" pageNumber="16">
<subSubSection pageId="1" pageNumber="16" type="nomenclature">
<paragraph pageId="1" pageNumber="16">
Genus
<taxonomicName LSID="http://zoobank.org/4EF3E7E6-3D4C-40A3-B294-3E79DB0D2EE2" authority="Hou" class="Malacostraca" family="Talitridae" genus="Myanmarorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Myanmarorchestia" order="Amphipoda" pageId="1" pageNumber="16" phylum="Arthropoda" rank="genus">Myanmarorchestia Hou</taxonomicName>
<taxonomicNameLabel pageId="1" pageNumber="16">gen. n.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="16" type="type species">
<paragraph pageId="1" pageNumber="16">Type species.</paragraph>
<paragraph pageId="1" pageNumber="16">
<taxonomicName class="Malacostraca" family="Arcitalitridae" genus="Myanmarorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Myanmarorchestia peterjaegeri" order="Amphipoda" pageId="1" pageNumber="16" phylum="Arthropoda" rank="species" species="peterjaegeri">Myanmarorchestia peterjaegeri</taxonomicName>
Hou, sp. n.
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="16" type="etymology">
<paragraph pageId="1" pageNumber="16">Etymology.</paragraph>
<paragraph pageId="1" pageNumber="16">
The generic name is derived from
<normalizedToken originalValue="“Myanmar”">&quot;Myanmar&quot;</normalizedToken>
in combination with the
<taxonomicName class="Malacostraca" family="Talitridae" genus="Orchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Orchestia" order="Amphipoda" pageId="1" pageNumber="16" phylum="Arthropoda" rank="genus">Orchestia</taxonomicName>
stem.
</paragraph>
</subSubSection>
<subSubSection lastPageId="2" lastPageNumber="17" pageId="1" pageNumber="16" type="diagnosis">
<paragraph pageId="1" pageNumber="16">Diagnosis.</paragraph>
<paragraph pageId="1" pageNumber="16">Body size medium. Eyes rounded or sub-rounded, approximately 1/3 of head length. Antenna I reaching mid-point of peduncular article V of antenna II, flagellum a little shorter than peduncle. Antenna II 28% of body length, flagellum a little longer than peduncle. Mandible left lacinia mobilis 4-dentate. Maxilliped palp with four articles, first two articles broad; article III not lobate distomedially, article IV distinct, short, with apical spine and setae.</paragraph>
<paragraph pageId="2" pageNumber="17">
<pageBreakToken pageId="2" pageNumber="17" start="start">Gnathopod</pageBreakToken>
I coxal plate with anterior process prominent, carpus lacking pellucid lobe, propodus simple, narrowed distally in both sexes. Gnathopod II sexually dimorphic; propodus of male transitional form, weakly chelate, with tumescence, propodus of female mitten-shaped. Pereopods simplidactylate, with two spines at hinge of unguis. Coxal gills present on gnathopod II and pereopods
<normalizedToken originalValue="IIIVI">III-VI</normalizedToken>
; each gill lobed and convoluted, one or two lobes with ridged margins or filamentous projections. Oostegites slender, present on gnathopod II and pereopods
<normalizedToken originalValue="IIIV">III-V</normalizedToken>
.
</paragraph>
<paragraph pageId="2" pageNumber="17">Epimeral plates acuminate posterodistally, ventral margins without armature, lacking submarginal pits. Pleopods well-developed, peduncles with plumose setae on exterior margins. Uropod I peduncle with large distolateral spine, outer ramus marginally bare. Uropod III ramus shorter than peduncle. Telson subtriangular shaped, apically notched, each lobe with one or two apical spines.</paragraph>
</subSubSection>
<subSubSection lastPageId="3" lastPageNumber="18" pageId="2" pageNumber="17" type="remarks">
<paragraph pageId="2" pageNumber="17">Remarks.</paragraph>
<paragraph pageId="2" pageNumber="17">
<taxonomicName class="Malacostraca" family="Talitridae" genus="Myanmarorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Myanmarorchestia" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Myanmarorchestia</taxonomicName>
Hou, gen. n. is quite unique in having complex coxal gills which bears filamentous projections, simple gnathopod I in both sexes, and weakly chelate, transitional gnathopod II in male.
</paragraph>
<paragraph pageId="2" pageNumber="17">
The new genus belongs to the
<taxonomicName class="Malacostraca" family="Talitridae" genus="Orchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Orchestia" order="Amphipoda" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Orchestia</taxonomicName>
group. It is most similar to the genus
<taxonomicName class="Malacostraca" family="Talitridae" genus="Bousfieldia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Bousfieldia" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Bousfieldia</taxonomicName>
Chou &amp; Lee, 1996 in left lacinia 4-dentate, well-developed pleopods and bare outer ramus in uropod I. It can be distinguished from
<taxonomicName class="Malacostraca" family="Talitridae" genus="Bousfieldia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Bousfieldia" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Bousfieldia</taxonomicName>
by the following characters (
<taxonomicName class="Malacostraca" family="Talitridae" genus="Bousfieldia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Bousfieldia" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Bousfieldia</taxonomicName>
in parentheses): gnathopod II in male subtriangle, with tumescence (strongly subchelate, oval in shape); pereopods simplidactylate (cuspidactylate); coxal gills of gnathopod II and pereopods
<normalizedToken originalValue="IIIVI">III-VI</normalizedToken>
lobed and convoluted, with ridged margins or filamentous projections (coxal gills lobed at middle, no filamentous projections).
</paragraph>
<paragraph pageId="2" pageNumber="17">
The new genus can be distinguished from other terrestrial
<taxonomicName class="Malacostraca" family="Talitridae" genus="Orchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Orchestia" order="Amphipoda" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Orchestia</taxonomicName>
groups from Indo-West Pacific margins (
<taxonomicName class="Malacostraca" family="Talitridae" genus="Lanorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Lanorchestia" order="Amphipoda" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Lanorchestia</taxonomicName>
Miyamoto &amp; Morino, 2010,
<taxonomicName class="Malacostraca" family="Talitridae" genus="Mizuhorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mizuhorchestia" order="Amphipoda" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Mizuhorchestia</taxonomicName>
Morino, 2014 and
<taxonomicName class="Malacostraca" family="Talitridae" genus="Nipponorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nipponorchestia" order="Amphipoda" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Nipponorchestia</taxonomicName>
Morino &amp; Miyamoto, 2015) by gnathopod II subtriangle (oval); pereopods simplidactylate (cuspidactylate); and pleopods well-developed (reduced).
</paragraph>
<paragraph pageId="2" pageNumber="17">
This new genus shows morphological similarities to one landhopper genus from the Philippines,
<taxonomicName class="Malacostraca" family="Talitridae" genus="Curiotalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Curiotalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Curiotalitrus</taxonomicName>
Lowry &amp; Coleman, 2012 in sharing antenna I shorter than peduncular article V of antenna II; mandible left lacinia mobilis 4-dentate; article IV of maxilliped palp very short, well defined; uropod III ramus shorter than peduncle. It can be distinguished from
<taxonomicName class="Malacostraca" family="Talitridae" genus="Curiotalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Curiotalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Curiotalitrus</taxonomicName>
by the following characters (
<taxonomicName class="Malacostraca" family="Talitridae" genus="Curiotalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Curiotalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Curiotalitrus</taxonomicName>
in parentheses): gnathopod I carpus slightly expended near distal end, propodus stout (subchelate; posterior margins of carpus and propodus with palmate lobes); gnathopod II sexually dimorphic, propodus of male subtriangle, with tumescence (not sexually dimorphic, mitten-shaped); pleopods rami with numerous articles (fused 1-articulate); uropod I of male similar to that of the female (sexual dimorphism in uropod I); telson with 1-2 apical spines on each lobe (with 3-6 robust setae).
</paragraph>
<paragraph lastPageId="3" lastPageNumber="18" pageId="2" pageNumber="17">
The new genus
<taxonomicName class="Malacostraca" family="Talitridae" genus="Myanmarorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Myanmarorchestia" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Myanmarorchestia</taxonomicName>
is similar to landhopper genera
<taxonomicName class="Malacostraca" family="Talitridae" genus="Arcitalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Arcitalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Arcitalitrus</taxonomicName>
Hurley, 1975,
<taxonomicName class="Malacostraca" family="Talitridae" genus="Keratroides" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Keratroides" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Keratroides</taxonomicName>
Hurley, 1975 and
<taxonomicName class="Malacostraca" family="Talitridae" genus="Mysticotalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysticotalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Mysticotalitrus</taxonomicName>
Hurley, 1975 in sharing following characters: left mandible lacinia mobilis 4-dentate; maxilliped palp article II unlobed, article IV distinct and small; gnathopod I simple; pereopods
<normalizedToken originalValue="IIIVII">III-VII</normalizedToken>
simplidactylate; and uropod I peduncle with distinct distolateral spine, outer ramus marginally bare. However, genera
<taxonomicName class="Malacostraca" family="Talitridae" genus="Arcitalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Arcitalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Arcitalitrus</taxonomicName>
,
<taxonomicName class="Malacostraca" family="Talitridae" genus="Keratroides" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Keratroides" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Keratroides</taxonomicName>
and
<taxonomicName class="Malacostraca" family="Talitridae" genus="Mysticotalitrus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mysticotalitrus" pageId="2" pageNumber="17" phylum="Arthropoda" rank="genus">Mysticotalitrus</taxonomicName>
with more
<pageBreakToken pageId="3" pageNumber="18" start="start">or</pageBreakToken>
less reduced pleopods, the peduncle lacking plumose setae; and telson not subtriangular in shape.
<taxonomicName class="Malacostraca" family="Talitridae" genus="Solitroides" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Solitroides" pageId="3" pageNumber="18" phylum="Arthropoda" rank="genus">Solitroides</taxonomicName>
female is also similar to that of the new genus, but coxal gills not lobed, reduced pleopod III are distinguishing characters. The genus
<taxonomicName class="Malacostraca" family="Talitridae" genus="Talitriator" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Talitriator" pageId="3" pageNumber="18" phylum="Arthropoda" rank="genus">Talitriator</taxonomicName>
Methuen, 1913 shares most features with the new genus, but gnathopod II in male is mitten-shaped and the telson is wider in middle. The peculiar gnathopod II in male of the new genus
<taxonomicName class="Malacostraca" family="Talitridae" genus="Myanmarorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Myanmarorchestia" pageId="3" pageNumber="18" phylum="Arthropoda" rank="genus">Myanmarorchestia</taxonomicName>
is also exhibited in
<taxonomicName class="Malacostraca" family="Talitridae" genus="Puhuruhuru" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Puhuruhuru patersoni" pageId="3" pageNumber="18" phylum="Arthropoda" rank="species" species="patersoni">Puhuruhuru patersoni</taxonomicName>
(Stephensen, 1938),
<taxonomicName class="Malacostraca" family="Makawidae" genus="Parorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Parorchestia lesliensis" order="Amphipoda" pageId="3" pageNumber="18" phylum="Arthropoda" rank="species" species="lesliensis">Parorchestia lesliensis</taxonomicName>
(Hurley, 1957), and
<taxonomicName class="Malacostraca" family="Talitridae" genus="Platorchestia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Platorchestia zachsi" order="Amphipoda" pageId="3" pageNumber="18" phylum="Arthropoda" rank="species" species="zachsi">Platorchestia zachsi</taxonomicName>
(Derzhavin, 1937), but they can be distinguished from the new genus by cuspidactylate pereopods
<normalizedToken originalValue="IIIVII">III-VII</normalizedToken>
.
</paragraph>
</subSubSection>
</treatment>
</document>