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<document id="CAA5807F5F330C8D5069D408D40C1D0E" ID-CLB-Dataset="32584" ID-DOI="10.11646/zootaxa.4300.1.1" ID-GBIF-Dataset="7eb2410e-8578-432a-88f8-bc129d0a5b08" ID-ISSN="1175-5326" ID-Zenodo-Dep="837117" ID-ZooBank="5FA0C659-9C52-4ABB-9CB6-1FB5CDDDF9F8" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1501581608167" checkinUser="plazi" docAuthor="Gusakov, Vladimir A. &amp; Gagarin, Vladimir G." docDate="2017" docId="03B1879D916C0C0B1880FB9BFCA8A7C0" docLanguage="en" docName="zootaxa.4300.1.1.pdf" docOrigin="Zootaxa 4300 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Rhabdolaimidae Chitwood 1951" docType="treatment" docVersion="8" lastPageNumber="12" masterDocId="FF88FFE591670C071817FFF7FFBDA66D" masterDocTitle="An annotated checklist of the main representatives of meiobenthos from inland water bodies of Central and Southern Vietnam. I. Roundworms (Nematoda)" masterLastPageNumber="43" masterPageNumber="1" pageNumber="12" updateTime="1698466091254" updateUser="ExternalLinkService">
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<mods:title id="9EECF8774E417DE7D7D2793943FDD5BE">An annotated checklist of the main representatives of meiobenthos from inland water bodies of Central and Southern Vietnam. I. Roundworms (Nematoda)</mods:title>
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<mods:namePart id="0728A8B5E3BC5341988ABDE0D305C965">Gusakov, Vladimir A.</mods:namePart>
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<mods:namePart id="FCEB41434FD280B7F0DC01F2DE469EEE">Gagarin, Vladimir G.</mods:namePart>
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<mods:date id="0E26CAD533F2C41951674D2816DC4E19">2017</mods:date>
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<treatment id="03B1879D916C0C0B1880FB9BFCA8A7C0" ID-DOI="http://doi.org/10.5281/zenodo.6018237" ID-GBIF-Taxon="132617999" ID-Zenodo-Dep="6018237" LSID="urn:lsid:plazi:treatment:03B1879D916C0C0B1880FB9BFCA8A7C0" httpUri="http://treatment.plazi.org/id/03B1879D916C0C0B1880FB9BFCA8A7C0" lastPageId="12" lastPageNumber="12" pageId="11" pageNumber="12">
<subSubSection id="C3026500916C0C0C1880FB9BFCE6A2A6" pageId="11" pageNumber="12" type="nomenclature">
<paragraph id="8BA7368B916C0C0C1880FB9BFD2DA2EB" blockId="11.[151,656,1132,1158]" box="[151,656,1132,1158]" pageId="11" pageNumber="12">
<heading id="D0EF81E7916C0C0C1880FB9BFD2DA2EB" bold="true" box="[151,656,1132,1158]" fontSize="11" level="1" pageId="11" pageNumber="12" reason="1">
<emphasis id="B96CEA99916C0C0C1880FB9BFD2DA2EB" bold="true" box="[151,656,1132,1158]" pageId="11" pageNumber="12">
Family
<taxonomicName id="4C184D08916C0C0C18E1FB9BFD2DA2EB" authority="Chitwood, 1951" authorityName="Chitwood" authorityYear="1951" box="[246,656,1132,1158]" class="Adenophorea" family="Rhabdolaimidae" kingdom="Animalia" order="Araeolaimida" pageId="11" pageNumber="12" phylum="Nematoda" rank="family">Rhabdolaimidae Chitwood, 1951</taxonomicName>
</emphasis>
</heading>
</paragraph>
<paragraph id="8BA7368B916C0C0C1880FB44FCE6A2A6" blockId="11.[151,1436,1203,1410]" box="[151,859,1203,1228]" pageId="11" pageNumber="12">
4.
<emphasis id="B96CEA99916C0C0C18A4FB44FD31A2A1" bold="true" box="[179,652,1203,1228]" pageId="11" pageNumber="12">
<taxonomicName id="4C184D08916C0C0C18A4FB44FDD2A2A1" authority="de Man, 1880" authorityName="de Man" authorityYear="1880" box="[179,623,1203,1228]" class="Adenophorea" family="Rhabdolaimidae" genus="Rhabdolaimus" kingdom="Animalia" order="Araeolaimida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="terrestris">
<emphasis id="B96CEA99916C0C0C18A4FB44FE75A2A1" bold="true" box="[179,456,1203,1228]" italics="true" pageId="11" pageNumber="12">Rhabdolaimus terrestris</emphasis>
de Man, 1880
</taxonomicName>
—
</emphasis>
{25} (0, 4, 0, 0;
<emphasis id="B96CEA99916C0C0C1B53FB44FCEFA2A1" bold="true" box="[836,850,1203,1228]" pageId="11" pageNumber="12">1</emphasis>
)
</paragraph>
</subSubSection>
<subSubSection id="C3026500916C0C0C18D0FB2EFBF1A09D" pageId="11" pageNumber="12" type="description">
<paragraph id="8BA7368B916C0C0C18D0FB2EFB5BA29F" blockId="11.[151,1436,1203,1410]" box="[199,1254,1238,1266]" pageId="11" pageNumber="12">
<emphasis id="B96CEA99916C0C0C18D0FB2EFD3EA29F" bold="true" box="[199,643,1241,1266]" pageId="11" pageNumber="12">Population structure and abundance.</emphasis>
One juvenile individual and two females (~1
<date id="FFA6104B916C0C0C1C6CFB2DFB0DA289" box="[1147,1200,1238,1266]" pageId="11" pageNumber="12" value="2010-10-03">x10 3</date>
/m2).
</paragraph>
<paragraph id="8BA7368B916C0C0C18D0FB0AFB31A3EF" blockId="11.[151,1436,1203,1410]" pageId="11" pageNumber="12">
<materialsCitation id="3B703CD6916C0C0C18D0FB0AFB31A3EF" ID-GBIF-Occurrence="1585189545" country="Vietnam" location="South" pageId="11" pageNumber="12" specimenCount="1" stateProvince="South">
<emphasis id="B96CEA99916C0C0C18D0FB0AFDB8A37B" bold="true" box="[199,517,1277,1302]" pageId="11" pageNumber="12">Ecology and distribution.</emphasis>
Amphibiont. Occurs in various aquatic and terrestrial biotopes. Presumably cosmopolitan. Widely distributed in Europe, Asia and Africa; noted in some countries of North and
<collectingRegion id="49DCF869916C0C0C1CE4FAD6FA88A357" box="[1267,1333,1313,1338]" country="Tanzania" name="Kusini Unguja" pageId="11" pageNumber="12">South</collectingRegion>
America and Oceania (
<bibRefCitation id="EF894B7A916C0C0C192EFAB2FE51A333" author="Andrassy" box="[313,492,1349,1374]" pageId="11" pageNumber="12" refString="Andrassy, I. (2005) Free-living nematodes of Hungary (Nematoda Errantia). I. Pedozoologica Hungarica, No. 3, 1 - 518." type="book chapter" year="2005">Andrássy 2005</bibRefCitation>
). Observed in diverse aquatic and soil biotopes in northern
<collectingCountry id="F30F761B916C0C0C1CB9FAB2FAB0A333" box="[1198,1293,1349,1374]" name="Vietnam" pageId="11" pageNumber="12">Vietnam</collectingCountry>
(
<bibRefCitation id="EF894B7A916C0C0C1D08FAB2FE82A3EF" author="Gagarin" pageId="11" pageNumber="12" refString="Gagarin, V. G. &amp; Nguyen, V. T. (2005 a) Free-living nematodes from some fresh water bodies of Northern Vietnam. Biologiya Fnutrennih Fod, No. 1, 18 - 23. [in Russian]" type="book chapter" year="2005" yearSuffix="a">Gagarin &amp; Nguyen 2005a</bibRefCitation>
;
<bibRefCitation id="EF894B7A916C0C0C195DFA9DFDDCA3EF" author="Nguyen" box="[330,609,1385,1410]" pageId="11" pageNumber="12" refString="Nguyen, T. T. &amp; Nguyen, V. T. (2005) Comparison on Free-living Nematode Compositions of the Cau, Day, Cam and Nhue Rivers. T ap chi Sinh H oc, 27, 36 - 42. [in Vietnamese]" type="journal article" year="2005">Nguyen &amp; Nguyen 2005</bibRefCitation>
;
<bibRefCitation id="EF894B7A916C0C0C1A7AFA9DFCBAA3EF" author="Nguyen" box="[621,775,1386,1410]" pageId="11" pageNumber="12" refString="Nguyen, V. T. (2007) Free-living nematodes Monhysterida, Araeolaimida, Chromadorida, Rhabditida, Enoplida, Mononchida, Dorylaimida. In: Dang, N. T. (Ed.), Fauna of Fietnam. Fol. 22. Science and Technics Publishing House, Hanoi, 455 pp. [in Vietnamese]" type="book" year="2007">Nguyen 2007</bibRefCitation>
;
<bibRefCitation id="EF894B7A916C0C0C1B04FA9EFB8AA3EF" author="Gagarin" box="[787,1079,1385,1410]" pageId="11" pageNumber="12" refString="Gagarin, V. G. &amp; Nguyen, T. T. (2008 a) Free-living nematodes from the Chu River, Northern Vietnam. Inland Water Biology, 1, 14 - 18." type="journal article" year="2008" yearSuffix="a">Gagarin &amp; Nguyen 2008a</bibRefCitation>
, 2012).
</materialsCitation>
</paragraph>
<paragraph id="8BA7368B916C0C0C1880FA46FBBFA3A7" blockId="11.[151,1436,1457,2028]" box="[151,1026,1457,1482]" pageId="11" pageNumber="12">
5.
<emphasis id="B96CEA99916C0C0C18A4FA46FD31A3A7" bold="true" box="[179,652,1457,1482]" pageId="11" pageNumber="12">
*
<taxonomicName id="4C184D08916C0C0C18D6FA46FDD2A3A7" authority="Cobb, 1913" authorityName="Cobb" authorityYear="1913" box="[193,623,1457,1482]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916C0C0C18D6FA46FE5CA3A7" bold="true" box="[193,481,1457,1482]" italics="true" pageId="11" pageNumber="12">Udonchus tenuicaudatus</emphasis>
Cobb, 1913
</taxonomicName>
—
</emphasis>
{2, 20, 31, 58, 62} (11, 4, 8, 9;
<emphasis id="B96CEA99916C0C0C1BFCFA46FC44A3A7" bold="true" box="[1003,1017,1457,1482]" pageId="11" pageNumber="12">7</emphasis>
)
</paragraph>
<paragraph id="8BA7368B916C0C0C18D0FA22FEDBA051" blockId="11.[151,1436,1457,2028]" pageId="11" pageNumber="12">
<emphasis id="B96CEA99916C0C0C18D0FA22FD3CA383" bold="true" box="[199,641,1493,1518]" pageId="11" pageNumber="12">Population structure and abundance.</emphasis>
From 1 to 6 females (including those with eggs) and sporadic juveniles at the majority of sites (up to 4
<date id="FFA6104B916C0C0C19EDFA0AFD91A06A" box="[506,556,1529,1557]" pageId="11" pageNumber="12" value="2010-10-03">x10 3</date>
/m2), with 27 specimens (two juveniles, 15 females and 10 gravid females) at site 2 (10
<date id="FFA6104B916C0C0C18E9F9D3FE8CA043" box="[254,305,1568,1596]" pageId="11" pageNumber="12" value="2010-10-03">x10 3</date>
/m2).
</paragraph>
<paragraph id="8BA7368B916C0C0C18D0F9B0FBF1A09D" blockId="11.[151,1436,1457,2028]" pageId="11" pageNumber="12">
<materialsCitation id="3B703CD6916C0C0C18D0F9B0FBF1A09D" ID-GBIF-Occurrence="1585189561" country="Jamaica" location="northern India. Until" pageId="11" pageNumber="12" specimenCount="1" stateProvince="Central">
<emphasis id="B96CEA99916C0C0C18D0F9B0FE40A00D" bold="true" box="[199,509,1607,1632]" pageId="11" pageNumber="12">Ecology and distribution.</emphasis>
Amphibiont. Until recently considered a hydrobiont as it was noted only from water bodies of several European and African countries, and in some countries of
<collectingRegion id="49DCF869916C0C0C1C42F99CFB15A0E9" box="[1109,1192,1643,1668]" country="Zambia" name="Central" pageId="11" pageNumber="12">Central</collectingRegion>
(
<collectingCountry id="F30F761B916C0C0C1CAEF99CFAAAA0E9" box="[1209,1303,1643,1668]" name="Jamaica" pageId="11" pageNumber="12">Jamaica</collectingCountry>
) and
<collectingRegion id="49DCF869916C0C0C1D4CF99CFA21A0E9" box="[1371,1436,1643,1668]" country="Tanzania" name="Kusini Unguja" pageId="11" pageNumber="12">South</collectingRegion>
(
<collectingCountry id="F30F761B916C0C0C1889F978FEADA0C5" box="[158,272,1679,1704]" name="Colombia" pageId="11" pageNumber="12">Colombia</collectingCountry>
) America and Asia (
<collectingRegion id="49DCF869916C0C0C19EBF967FDE0A0C5" box="[508,605,1680,1704]" country="Indonesia" name="Sumatera Utara" pageId="11" pageNumber="12">Sumatra</collectingRegion>
) (
<bibRefCitation id="EF894B7A916C0C0C1A63F978FC99A0C5" author="Andrassy" box="[628,804,1679,1704]" pageId="11" pageNumber="12" refString="Andrassy, I. (2005) Free-living nematodes of Hungary (Nematoda Errantia). I. Pedozoologica Hungarica, No. 3, 1 - 518." type="book chapter" year="2005">Andrássy 2005</bibRefCitation>
). However, a 2012 paper (
<bibRefCitation id="EF894B7A916C0C0C1C58F978FA92A0C5" author="Tahseen" box="[1103,1327,1679,1704]" pageId="11" pageNumber="12" refString="Tahseen, Q., Sultana, R., Khan, R. &amp; Hussain, A. (2012) A New Genus and Species of the Family Rhabdolaimidae (Nematoda), with Descriptions of Two Known Species and Taxonomic Discussion. Journal of Nematology, 44, 302 - 312." type="journal article" year="2012">
Tahseen
<emphasis id="B96CEA99916C0C0C1CA3F967FB50A0C5" box="[1204,1261,1679,1704]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
2012
</bibRefCitation>
) reported
<taxonomicName id="4C184D08916C0C0C1880F943FEEBA0A1" authorityName="Cobb" authorityYear="1913" box="[151,342,1715,1740]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916C0C0C1880F943FF16A0A6" box="[151,171,1716,1739]" italics="true" pageId="11" pageNumber="12">U</emphasis>
.
<emphasis id="B96CEA99916C0C0C18AEF944FEEBA0A1" box="[185,342,1715,1740]" italics="true" pageId="11" pageNumber="12">tenuicaudatus</emphasis>
</taxonomicName>
populations from the soils of various regions of
<location id="8EC76050916C0C0C1B61F944FBE0A0A1" LSID="urn:lsid:plazi:treatment:03B1879D916C0C0B1880FB9BFCA8A7C0:8EC76050916C0C0C1B61F944FBE0A0A1" box="[886,1117,1715,1740]" country="Jamaica" name="northern India. Until" pageId="11" pageNumber="12" stateProvince="Central">northern India. Until</location>
the beginning of our studies on meiobenthos, this genus had not been recorded in
<collectingCountry id="F30F761B916C0C0C1AFCF920FCF7A09D" box="[747,842,1751,1776]" name="Vietnam" pageId="11" pageNumber="12">Vietnam</collectingCountry>
(Gusakov
<emphasis id="B96CEA99916C0C0C1BD3F92FFC41A09D" box="[964,1020,1751,1776]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
2014).
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C3026500916C0C0B18D0F90CFCA8A7C0" lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12" type="discussion">
<paragraph id="8BA7368B916C0C0B18D0F90CFCA8A7C0" blockId="11.[151,1436,1457,2028]" lastBlockId="12.[151,1436,151,429]" lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12">
<emphasis id="B96CEA99916C0C0C18D0F90CFE86A179" bold="true" box="[199,315,1787,1812]" pageId="11" pageNumber="12">Remarks.</emphasis>
Males are unknown (
<bibRefCitation id="EF894B7A916C0C0C1A38F90CFCACA179" author="Tahseen" box="[559,785,1787,1812]" pageId="11" pageNumber="12" refString="Tahseen, Q., Sultana, R., Khan, R. &amp; Hussain, A. (2012) A New Genus and Species of the Family Rhabdolaimidae (Nematoda), with Descriptions of Two Known Species and Taxonomic Discussion. Journal of Nematology, 44, 302 - 312." type="journal article" year="2012">
Tahseen
<emphasis id="B96CEA99916C0C0C1A83F90BFD70A179" box="[660,717,1787,1812]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
2012
</bibRefCitation>
). In our earlier paper (Gusakov
<emphasis id="B96CEA99916C0C0C1C6FF90BFB0CA179" box="[1144,1201,1787,1812]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
2014), we described this taxon under the name
<taxonomicName id="4C184D08916C0C0C19D7F8D7FD30A155" authorityName="Eyualem &amp; Coomans" authorityYear="1996" box="[448,653,1823,1848]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="merhatibebi">
<emphasis id="B96CEA99916C0C0C19D7F8D7FE66A15A" box="[448,475,1824,1847]" italics="true" pageId="11" pageNumber="12">U.</emphasis>
cf.
<emphasis id="B96CEA99916C0C0C1A11F8E8FD30A155" box="[518,653,1823,1848]" italics="true" pageId="11" pageNumber="12">merhatibebi</emphasis>
</taxonomicName>
. This was because we could not conclusively assign any of our initial specimens to
<taxonomicName id="4C184D08916C0C0C1924F8B3FC98A131" authority="Eyualem &amp; Coomans, 1996" authorityName="Eyualem &amp; Coomans" authorityYear="1996" box="[307,805,1859,1884]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="merhatibebi">
<emphasis id="B96CEA99916C0C0C1924F8B3FE63A131" box="[307,478,1859,1884]" italics="true" pageId="11" pageNumber="12">U. merhatibebi</emphasis>
<bibRefCitation id="EF894B7A916C0C0C19F1F8B4FC98A131" author="Eyualem" box="[486,805,1859,1884]" pageId="11" pageNumber="12" refString="Eyualem, A. &amp; Coomans, A. (1996) Aquatic nematodes from Ethiopia VII. The family Rhabdolaimidae Chitwood, 1951 sensu Lorenzen, 1981 (Chromadorida: Nematoda) with the description of Udonchus merhatibebi n. sp. Hydrobiologia, 341, 197 - 214." type="journal article" year="1996">Eyualem &amp; Coomans, 1996</bibRefCitation>
</taxonomicName>
, described from
<collectingCountry id="F30F761B916C0C0C1BF1F8B4FBF8A131" box="[998,1093,1859,1884]" name="Ethiopia" pageId="11" pageNumber="12">Ethiopia</collectingCountry>
(
<bibRefCitation id="EF894B7A916C0C0C1C43F8B4FA2DA131" author="Eyualem" box="[1108,1424,1859,1884]" pageId="11" pageNumber="12" refString="Eyualem, A. &amp; Coomans, A. (1996) Aquatic nematodes from Ethiopia VII. The family Rhabdolaimidae Chitwood, 1951 sensu Lorenzen, 1981 (Chromadorida: Nematoda) with the description of Udonchus merhatibebi n. sp. Hydrobiologia, 341, 197 - 214." type="journal article" year="1996">Eyualem &amp; Coomans 1996</bibRefCitation>
), and were unaware of the morphologically similar
<taxonomicName id="4C184D08916C0C0C1AC1F89FFC2AA1ED" authorityName="Cobb" authorityYear="1913" box="[726,919,1895,1920]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916C0C0C1AC1F89FFD57A112" box="[726,746,1896,1919]" italics="true" pageId="11" pageNumber="12">U</emphasis>
.
<emphasis id="B96CEA99916C0C0C1AEDF890FC2AA1ED" box="[762,919,1895,1920]" italics="true" pageId="11" pageNumber="12">tenuicaudatus</emphasis>
</taxonomicName>
. Further analysis of Vietnamese samples has shown that a majority of the adult specimens found (as assessed on the basis of a set of features) conform to descriptions of
<taxonomicName id="4C184D08916C0C0C1950F847FDB5A1A5" authorityName="Cobb" authorityYear="1913" box="[327,520,1967,1992]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="11" pageNumber="12" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916C0C0C1950F847FEE6A1AA" box="[327,347,1968,1991]" italics="true" pageId="11" pageNumber="12">U</emphasis>
.
<emphasis id="B96CEA99916C0C0C197CF858FDB5A1A5" box="[363,520,1967,1992]" italics="true" pageId="11" pageNumber="12">tenuicaudatus</emphasis>
</taxonomicName>
(
<bibRefCitation id="EF894B7A916C0C0C1A0FF858FCEFA1A5" author="Eyualem" box="[536,850,1967,1992]" pageId="11" pageNumber="12" refString="Eyualem, A. &amp; Coomans, A. (1996) Aquatic nematodes from Ethiopia VII. The family Rhabdolaimidae Chitwood, 1951 sensu Lorenzen, 1981 (Chromadorida: Nematoda) with the description of Udonchus merhatibebi n. sp. Hydrobiologia, 341, 197 - 214." type="journal article" year="1996">Eyualem &amp; Coomans 1996</bibRefCitation>
;
<bibRefCitation id="EF894B7A916C0C0C1B77F858FBB3A1A5" author="Andrassy" box="[864,1038,1967,1992]" pageId="11" pageNumber="12" refString="Andrassy, I. (2005) Free-living nematodes of Hungary (Nematoda Errantia). I. Pedozoologica Hungarica, No. 3, 1 - 518." type="book chapter" year="2005">Andrássy 2005</bibRefCitation>
;
<bibRefCitation id="EF894B7A916C0C0C1C0CF858FB42A1A5" author="Tahseen" box="[1051,1279,1967,1992]" pageId="11" pageNumber="12" refString="Tahseen, Q., Sultana, R., Khan, R. &amp; Hussain, A. (2012) A New Genus and Species of the Family Rhabdolaimidae (Nematoda), with Descriptions of Two Known Species and Taxonomic Discussion. Journal of Nematology, 44, 302 - 312." type="journal article" year="2012">
Tahseen
<emphasis id="B96CEA99916C0C0C1C68F847FB04A1A5" box="[1151,1209,1967,1992]" italics="true" pageId="11" pageNumber="12">et al.</emphasis>
2012
</bibRefCitation>
). At the same time, even within a single habitat we found specimens displaying in various combinations the diagnostic features of both species (shapes of the lip region, cardia and associated gland cells, and of the tail tip, amphid position, etc.). Without considering the whole range of variation in these features, some individuals of these populations could be identified as
<taxonomicName id="4C184D08916B0C0B193EFF16FE6EA695" authorityName="Eyualem &amp; Coomans" authorityYear="1996" box="[297,467,223,248]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="12" pageNumber="13" phylum="Nematoda" rank="species" species="merhatibebi">
<emphasis id="B96CEA99916B0C0B193EFF16FE6EA695" box="[297,467,223,248]" italics="true" pageId="12" pageNumber="13">U. merhatibebi</emphasis>
</taxonomicName>
. A similar mixing of the features of these two species was noted in the description of soil populations of
<taxonomicName id="4C184D08916B0C0B1961FEF2FD85A770" authorityName="Cobb" authorityYear="1913" box="[374,568,260,285]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="12" pageNumber="13" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916B0C0B1961FEF2FE37A771" box="[374,394,261,284]" italics="true" pageId="12" pageNumber="13">U</emphasis>
.
<emphasis id="B96CEA99916B0C0B198CFEF3FD85A770" box="[411,568,260,285]" italics="true" pageId="12" pageNumber="13">tenuicaudatus</emphasis>
</taxonomicName>
from
<collectingCountry id="F30F761B916B0C0B1A96FEF3FD07A770" box="[641,698,260,285]" name="India" pageId="12" pageNumber="13">India</collectingCountry>
(
<bibRefCitation id="EF894B7A916B0C0B1ADBFEF3FC0FA771" author="Tahseen" box="[716,946,260,285]" pageId="12" pageNumber="13" refString="Tahseen, Q., Sultana, R., Khan, R. &amp; Hussain, A. (2012) A New Genus and Species of the Family Rhabdolaimidae (Nematoda), with Descriptions of Two Known Species and Taxonomic Discussion. Journal of Nematology, 44, 302 - 312." type="journal article" year="2012">
Tahseen
<emphasis id="B96CEA99916B0C0B1B25FEF2FCD0A770" box="[818,877,260,285]" italics="true" pageId="12" pageNumber="13">et al.</emphasis>
2012
</bibRefCitation>
), where this phenomenon is discussed and illustrated in detail. Those authors suggest that
<taxonomicName id="4C184D08916B0C0B1AD7FEDEFC3FA72D" authorityName="Cobb" authorityYear="1913" box="[704,898,295,320]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="12" pageNumber="13" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916B0C0B1AD7FEDEFD69A72D" box="[704,724,297,320]" italics="true" pageId="12" pageNumber="13">U</emphasis>
.
<emphasis id="B96CEA99916B0C0B1AF2FED0FC3FA72D" box="[741,898,295,320]" italics="true" pageId="12" pageNumber="13">tenuicaudatus</emphasis>
</taxonomicName>
is a widespread and morphologically variable species depending on geographical location and that the few diagnostic features that distinguish it from the presumably close species
<taxonomicName id="4C184D08916B0C0B19DDFE86FDC5A7E5" authorityName="Eyualem &amp; Coomans" authorityYear="1996" box="[458,632,367,392]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="12" pageNumber="13" phylum="Nematoda" rank="species" species="merhatibebi">
<emphasis id="B96CEA99916B0C0B19DDFE86FDC5A7E5" box="[458,632,367,392]" italics="true" pageId="12" pageNumber="13">U. merhatibebi</emphasis>
</taxonomicName>
are unreliable. Our study on populations of
<taxonomicName id="4C184D08916B0C0B1C83FE86FAE4A7E5" authorityName="Cobb" authorityYear="1913" box="[1172,1369,367,392]" class="Adenophorea" family="Tripylidae" genus="Udonchus" kingdom="Animalia" order="Enoplida" pageId="12" pageNumber="13" phylum="Nematoda" rank="species" species="tenuicaudatus">
<emphasis id="B96CEA99916B0C0B1C83FE86FB15A7E5" box="[1172,1192,369,392]" italics="true" pageId="12" pageNumber="13">U</emphasis>
.
<emphasis id="B96CEA99916B0C0B1CABFE98FAE4A7E5" box="[1212,1369,367,392]" italics="true" pageId="12" pageNumber="13">tenuicaudatus</emphasis>
</taxonomicName>
from Vietnamese inland waters has led us to a similar opinion.
</paragraph>
</subSubSection>
</treatment>
</document>
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