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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.175.2413" ID-GBIF-Dataset="46454252-ad49-4e36-8505-8adc729823ad" ID-PMC="PMC3307344" ID-Pensoft-Pub="1313-2970-175-1" ID-PubMed="22451787" ModsDocAuthor="" ModsDocDate="2012" ModsDocID="1313-2970-175-1" ModsDocOrigin="ZooKeys 175" ModsDocTitle="Three new species of Potamothrix (Oligochaeta, Naididae, Tubificinae) from Fuxian Lake, the deepest lake of Yunnan Province, Southwest China" checkinTime="1451249296165" checkinUser="pensoft" docAuthor="Cui, Yongde &amp; Wang, Hongzhu" docDate="2012" docId="0FE25F7CA18DF768C24B87311A511A0F" docLanguage="en" docName="ZooKeys 175: 1-17" docOrigin="ZooKeys 175" docSource="http://dx.doi.org/10.3897/zookeys.175.2413" docTitle="Potamothrix paramoldaviensis Cui &amp; Wang, 2012, sp. n." docType="treatment" docVersion="4" lastPageNumber="6" masterDocId="FFA6FFA9FFB627378905577DD05BFFAD" masterDocTitle="Three new species of Potamothrix (Oligochaeta, Naididae, Tubificinae) from Fuxian Lake, the deepest lake of Yunnan Province, Southwest China" masterLastPageNumber="17" masterPageNumber="1" pageNumber="4" updateTime="1668153360783" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Three new species of Potamothrix (Oligochaeta, Naididae, Tubificinae) from Fuxian Lake, the deepest lake of Yunnan Province, Southwest China</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Cui, Yongde</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Wang, Hongzhu</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2012</mods:date>
<mods:detail type="volume">
<mods:number>175</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>17</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.175.2413</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.175.2413</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-175-1</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="152033550" LSID="urn:lsid:zoobank.org:act:9FE88E3F-B244-443B-9E5D-0DB70AB4559B" httpUri="http://treatment.plazi.org/id/0FE25F7CA18DF768C24B87311A511A0F" lastPageId="5" lastPageNumber="6" pageId="3" pageNumber="4">
<subSubSection pageId="3" pageNumber="4" type="nomenclature">
<paragraph pageId="3" pageNumber="4">
<taxonomicName LSID="urn:lsid:zoobank.org:act:9FE88E3F-B244-443B-9E5D-0DB70AB4559B" class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix paramoldaviensis" order="Haplotaxida" pageId="3" pageNumber="4" phylum="Annelida" rank="species" species="paramoldaviensis">Potamothrix paramoldaviensis</taxonomicName>
<taxonomicNameLabel pageId="3" pageNumber="4">sp. n.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="3" pageNumber="4" type="holotype">
<paragraph pageId="3" pageNumber="4">Holotype.</paragraph>
<paragraph pageId="3" pageNumber="4">IHB YAN 20020812i, mature specimen mounted in Canada balsam, and stained with borax carmine.</paragraph>
</subSubSection>
<subSubSection pageId="4" pageNumber="5" type="type locality">
<paragraph pageId="4" pageNumber="5">
<pageBreakToken pageId="4" pageNumber="5" start="start">Type</pageBreakToken>
locality.
</paragraph>
<paragraph pageId="4" pageNumber="5">
East of Gushan Island (
<geoCoordinate direction="north" orientation="latitude" precision="15" value="24.401388">24°24'05&quot;N</geoCoordinate>
,
<geoCoordinate direction="east" orientation="longitude" precision="15" value="102.879166">102°52'45&quot;E</geoCoordinate>
) in Fuxian Lake, eastern Yunnan, China; depth 78 m, bottom temperature 15.9 °C, dissolved oxygen at bottom 9.6 mg/L, total nitrogen in water 0.155 mg/L, total phosphorus in water 0.0234 mg/L, fine clay; Aug 8, 2002, coll. Y. Cui and X. Liu.
</paragraph>
</subSubSection>
<subSubSection pageId="4" pageNumber="5" type="etymology">
<paragraph pageId="4" pageNumber="5">Etymology.</paragraph>
<paragraph pageId="4" pageNumber="5">
Named
<normalizedToken originalValue="“paramoldaviensis”">&quot;paramoldaviensis&quot;</normalizedToken>
for its resemblance with
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix moldaviensis" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="moldaviensis">Potamothrix moldaviensis</taxonomicName>
<normalizedToken originalValue="Vejdovský">Vejdovsky</normalizedToken>
&amp;
<normalizedToken originalValue="Mrázek">Mrazek</normalizedToken>
, 1902 in terms of its male genitalia.
</paragraph>
</subSubSection>
<subSubSection pageId="4" pageNumber="5" type="description">
<paragraph pageId="4" pageNumber="5">Description.</paragraph>
<paragraph pageId="4" pageNumber="5">Specimen incomplete, length&gt; 4.4 mm, diameter at XI about 0.7 mm, segments&gt; 13. Clitellum inconspicuous.</paragraph>
<paragraph pageId="4" pageNumber="5">
Chaetae (Fig. 2
<normalizedToken originalValue="A–B">A-B</normalizedToken>
) all bifid, 4-6 per bundle dorsally, 3-6 per bundle ventrally, 80-120
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 2.0-2.6
<normalizedToken originalValue="µm">µm</normalizedToken>
thick, upper tooth longer and thinner than lower. Spermathecal chaetae (Fig. 2D) one per bundle in posterior to middle of X, entally embedded in glandular sacs, 145-160
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 4.0-4.5
<normalizedToken originalValue="µm">µm</normalizedToken>
thick, with curved ental part, and grooved ectal part. Penial chaetae (Fig. 2C, F, pc) slightly different to other ventral chaetae, 1-2 per bundle in postero-XI, 70-74
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 2.0-2.4
<normalizedToken originalValue="µm">µm</normalizedToken>
thick, upper tooth as long as, but thicker than lower tooth. Male pores paired in line with ventral chaetae in postero-XI, immediately anterior to penial chaetae. Spermathecal pores paired in line with ventral chaetae in posterior to middle of X, immediately anterior to spermathecal chaetae.
</paragraph>
<paragraph pageId="4" pageNumber="5">
Pharyngeal glands in
<normalizedToken originalValue="II–III">II-III</normalizedToken>
. Chloragogen cells from VI onwards. No coelomocytes. Male genitalia (Fig. 2F) paired. Vasa deferentia (Fig. 2F, vd) very short, 27-38
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 16-20
<normalizedToken originalValue="µm">µm</normalizedToken>
wide, entering atria apically. Atria (Fig. 2F, at) 1050-1130
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 38-90
<normalizedToken originalValue="µm">µm</normalizedToken>
wide, tubular and rather homogenous throughout, with thin outer muscular layer and thick inner epithelium. Prostate gland small, attached proximally to atrium. Penis absent.
</paragraph>
<paragraph pageId="4" pageNumber="5">
Spermathecae ducts (Fig. 2E, sd) 345-360
<normalizedToken originalValue="µm">µm</normalizedToken>
long, 38-70
<normalizedToken originalValue="µm">µm</normalizedToken>
wide, ampullae (Fig. 2H, sa) pear-shaped, 420-430
<normalizedToken originalValue="µm">µm</normalizedToken>
long, maximally 230-250
<normalizedToken originalValue="µm">µm</normalizedToken>
wide. Spermatozeugmata (Fig. 2H, sz) 6-9 in each ampulla, about 300-640
<normalizedToken originalValue="µm">µm</normalizedToken>
long.
</paragraph>
</subSubSection>
<subSubSection pageId="4" pageNumber="5" type="distribution">
<paragraph pageId="4" pageNumber="5">Distribution and habitat.</paragraph>
<paragraph pageId="4" pageNumber="5">Known only from its type locality, Yunnan Province, China; freshwater lake, 78 m depth, water temperature less than 16 °C, fine clay.</paragraph>
</subSubSection>
<subSubSection lastPageId="5" lastPageNumber="6" pageId="4" pageNumber="5" type="remarks">
<paragraph pageId="4" pageNumber="5">Remarks.</paragraph>
<paragraph pageId="4" pageNumber="5">
According to very short vasa deferentia, long tubular atria each with a small prostate gland, and lack of ejaculatory ducts, the new species fits more closely the definition of
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="genus">Potamothrix</taxonomicName>
<normalizedToken originalValue="Vejdovský">Vejdovsky</normalizedToken>
&amp;
<normalizedToken originalValue="Mrázek">Mrazek</normalizedToken>
, 1902 than that of any other described tubificine genus (
<bibRefCitation pageId="4" pageNumber="5">Brinkhurst and Jamieson 1971</bibRefCitation>
;
<bibRefCitation author="Finogenova, NP" journalOrPublisher="Zoologische Jahrbuecher Abtleitung fuer Systematik" pageId="10" pageNumber="11" pagination="55 - 83" title="One more revision of the genus Potamothrix Vejdovsky et Mrazek, 1902 (Oligochaeta, Tubificidae)." volume="117" year="1990">Finogenova and Poddubnaja 1990</bibRefCitation>
).
</paragraph>
<paragraph pageId="4" pageNumber="5">
This new speciesresembles
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix moldaviensisin" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="moldaviensisin">Potamothrix moldaviensisin</taxonomicName>
some aspects of the male organs (
<bibRefCitation pageId="4" pageNumber="5">
<normalizedToken originalValue="Vejdovský">Vejdovsky</normalizedToken>
and
<normalizedToken originalValue="Mrázek">Mrazek</normalizedToken>
1902
</bibRefCitation>
), e.g. the very short vasa deferentia, tubular atria, and the length ration of the vasa diferentia to the atria, and their differences are obvious.
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix paramoldaviensis" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="paramoldaviensis">Potamothrix paramoldaviensis</taxonomicName>
sp. n. has homogenous atria with prostate glands and no penes, while
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix moldaviensis" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="moldaviensis">Potamothrix moldaviensis</taxonomicName>
has tripartite atria without prostate glands, with short penes.
</paragraph>
<paragraph lastPageId="5" lastPageNumber="6" pageId="4" pageNumber="5">
The new species is distinguishable from other species from the Yunnan lakes in the characteristics of some somatic chaetae. For instance, hair chaetae and pectinate bifid chaetae are present in
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix scleropenis" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="scleropenis">Potamothrix scleropenis</taxonomicName>
Cui &amp; Wang, 2005,
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix rhytipeniatus" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="rhytipeniatus">Potamothrix rhytipeniatus</taxonomicName>
Cui &amp; Wang, 2012,
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix aductus" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="aductus">Potamothrix aductus</taxonomicName>
Cui &amp; Wang, 2012,
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix praeprostatus" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="praeprostatus">Potamothrix praeprostatus</taxonomicName>
sp. n. and
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix parabedoti" order="Haplotaxida" pageId="4" pageNumber="5" phylum="Annelida" rank="species" species="parabedoti">Potamothrix parabedoti</taxonomicName>
sp. n.,
<pageBreakToken pageId="5" pageNumber="6" start="start">but</pageBreakToken>
hair chaetae are absent in
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix paramoldaviensis" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="paramoldaviensis">Potamothrix paramoldaviensis</taxonomicName>
; the spermathecal chaetae of these six species are dissimilar; slightly modified penial chaetae are present in
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix scleropenis" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="scleropenis">Potamothrix scleropenis</taxonomicName>
and
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix paramoldaviensis" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="paramoldaviensis">Potamothrix paramoldaviensis</taxonomicName>
, but are absent in the other three species (Table 2).
</paragraph>
<caption ID-Table-UUID="946E1F0F50E4C674FE84B0526FD3F9FC" httpUri="http://table.plazi.org/id/946E1F0F50E4C674FE84B0526FD3F9FC" pageId="5" pageNumber="6">
<paragraph pageId="5" pageNumber="6">
Table 2. Comparison of six species of
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="genus">Potamothrix</taxonomicName>
from Yunnan Lakes.
</paragraph>
</caption>
<paragraph pageId="5" pageNumber="6">
<table pageId="5" pageNumber="6">
<tr pageId="5" pageNumber="6">
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">Species</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix aductus" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="aductus">Potamothrix aductus</taxonomicName>
Cui &amp; Wang, 2012
</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix parabedoti" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="parabedoti">Potamothrix parabedoti</taxonomicName>
sp. n.
</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix paramoldaviensis" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="paramoldaviensis">Potamothrix paramoldaviensis</taxonomicName>
sp. n.
</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix praeprostatus" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="praeprostatus">Potamothrix praeprostatus</taxonomicName>
sp. n.
</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix rhytipeniatus" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="rhytipeniatus">Potamothrix rhytipeniatus</taxonomicName>
Cui &amp; Wang, 2012
</th>
<th colspan="1" pageId="5" pageNumber="6" rowspan="1">
<taxonomicName class="Clitellata" family="Naididae" genus="Potamothrix" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Potamothrix scleropenis" order="Haplotaxida" pageId="5" pageNumber="6" phylum="Annelida" rank="species" species="scleropenis">Potamothrix scleropenis</taxonomicName>
Cui &amp; Wang, 2005
</th>
</tr>
</table>
</paragraph>
</subSubSection>
</treatment>
</document>
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