treatments-xml/data/03/C3/87/03C387A6FFBF252069B9B1910C668041.xml

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<mods:title id="C6026955FB2AB982B8BA15B12AAFE99D">A new species of the genus Aeolosoma (Annelida: Aphanoneura: Aeolosomatidae) with peculiar sigmoid chaetae from fresh waters of Vietnam</mods:title>
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<mods:namePart id="326F2793930E619BB10979B1AD3B4C9B">Gusakov, Vladimir A.</mods:namePart>
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<mods:namePart id="631DDF11FDF0C23E6D150E5D0BB2B9C6">Dien, Tran Duc</mods:namePart>
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<mods:namePart id="42A73638754B2063C3FC04C0E4715253">Thanh, Nguyen Thi Hai</mods:namePart>
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<taxonomicName id="4C6A4D33FFBF252669B9B19108B987BD" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[151,448,151,178]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="2" pageNumber="287" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFBF252669B9B19108B987BD" bold="true" box="[151,448,151,178]" italics="true" pageId="2" pageNumber="287">Aeolosoma vietnamicum</emphasis>
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<paragraph id="8BD536B0FFBF252669B9B1BD081087D9" blockId="2.[151,522,151,213]" box="[151,361,187,213]" pageId="2" pageNumber="287">
(
<figureCitation id="13512A35FFBF252669B1B1BD087987D9" box="[159,256,187,213]" captionStart="FIGURE 1" captionStartId="1.[151,250,1580,1604]" captionTargetBox="[151,1435,453,1554]" captionTargetId="figure-119@1.[151,1435,453,1556]" captionTargetPageId="1" captionText="FIGURE 1. Details of the morphology of Aeolosoma vietnamicum sp. n. A. Entire body of holotype, lateral view; head to the left. B. Bundle of ventral sigmoid chaetae. C. Serrated hair chaeta, detail. D. A dorsal bundle with two hair chaetae and two sigmoid chaetae. E. Drawing of ventral sigmoid chaeta, lateral view. F, G. Tips of the ventral sigmoid chaetae, lateral view. H. Tip of the ventral sigmoid chaeta, frontal view from the concave side. I, J. Tips of dorsal sigmoid chaetae, lateral view." figureDoi="http://doi.org/10.5281/zenodo.5744734" httpUri="https://zenodo.org/record/5744734/files/figure.png" pageId="2" pageNumber="287">Figure 1</figureCitation>
; 
<tableCitation id="C6E8030BFFBF25266823B1BD082787D9" box="[269,350,187,213]" captionStart="TABLE 1" captionStartId="2.[151,239,801,825]" captionTargetPageId="2" captionText="TABLE 1. Composition and length of the chaetae of Aeolosoma vietnamicum sp. n. DH: dorsal hair chaetae, DS: dorsal sigmoid chaetae, VH: ventral hair chaetae; VS: ventral sigmoid chaetae. Numerical values give length of chaetae in µm. Values before slash: left side of the body. Values behind slash: right side of the body. Number of values correspond to number of chaetae in the respective bundle. En dash: chaetae absent;?: chaetae present, but length not measurable, due to broken tip or poor visibility." httpUri="http://table.plazi.org/id/DF156638FFBF252669B9B22708A684C5" pageId="2" pageNumber="287" tableUuid="DF156638FFBF252669B9B22708A684C5">Table 1</tableCitation>
)
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<typeStatus id="54D18812FFBF252669B9B005087F8611" box="[151,262,259,285]" pageId="2" pageNumber="287" type="holotype">Holotype</typeStatus>
.
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is deposited in the collection of the 
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of the 
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(
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), with slide inventory number 1/48236
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.
</paragraph>
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<materialsCitation id="3B023CEDFFBF252669E9B04D0DFC86A1" ID-GBIF-Occurrence="3413063301" country="Vietnam" county="Yaroslavl Province" location="One" municipality="Borok" pageId="2" pageNumber="287" specimenCount="1" typeStatus="paratype">
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<typeStatus id="54D18812FFBF252669E9B04D084F8669" box="[199,310,331,357]" pageId="2" pageNumber="287" type="paratype">Paratype</typeStatus>
.
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<location id="8EB5606BFFBF2526686AB04D080A8669" LSID="urn:lsid:plazi:treatment:03C387A6FFBF252069B9B1910C668041:8EB5606BFFBF2526686AB04D080A8669" box="[324,371,331,357]" country="Vietnam" county="Yaroslavl Province" municipality="Borok" name="One" pageId="2" pageNumber="287">One</location>
individual. 
<location id="8EB5606BFFBF252668D3B04D0B508669" LSID="urn:lsid:plazi:treatment:03C387A6FFBF252069B9B1910C668041:8EB5606BFFBF252668D3B04D0B508669" box="[509,553,331,357]" country="Vietnam" county="Yaroslavl Province" municipality="Borok" name="The" pageId="2" pageNumber="287">The</location>
worm is stored in the 
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Laboratory of 
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</location>
of Aquatic Invertebrates of the 
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for 
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Biology of 
<location id="8EB5606BFFBF25266B25B0690A028685" LSID="urn:lsid:plazi:treatment:03C387A6FFBF252069B9B1910C668041:8EB5606BFFBF25266B25B0690A028685" box="[523,891,367,394]" country="Vietnam" county="Yaroslavl Province" municipality="Borok" name="Inland Waters Russian Academy of Sciences" pageId="2" pageNumber="287">Inland Waters Russian Academy</location>
</location>
of Sciences (
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, 
<collectingCounty id="62B44E3CFFBF25266D42B0690C3E8686" box="[1132,1351,367,394]" pageId="2" pageNumber="287">Yaroslavl Province</collectingCounty>
), in the collection of representatives of meiobenthos from water bodies of 
<collectingCountry id="F37D7620FFBF25266A51B0950A9B86A1" box="[895,994,403,429]" name="Vietnam" pageId="2" pageNumber="287">Vietnam</collectingCountry>
: slide No. 136
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.
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<emphasis id="B91EEAA2FFBF252669E9B0B1081C86DD" bold="true" box="[199,357,439,465]" pageId="2" pageNumber="287">Type locality.</emphasis>
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, 
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, 
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peninsula, a flooded sand quarry, plant-filled (sedgelike macrophytes) littoral (
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, 
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), altitude 
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asl
</elevation>
, depth 
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<elevation id="0047D183FFBF25266D30B0DD0D1986FA" box="[1054,1120,475,502]" metricMagnitude="-1" metricUnit="m" metricValue="4.0" pageId="2" pageNumber="287" unit="m" value="0.4">0.4 m</elevation>
</quantity>
, water temperature 33.1 °С, рН 5.4, conductivity 54 μS/sm, sediment 
<typeStatus id="54D18812FFBF25266B4AB3060BE18516" box="[612,664,512,538]" pageId="2" pageNumber="287">type</typeStatus>
: sand with a thin layer of silt and plant debris, collected 
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<collectingDate id="EF90E998FFBF25266C28B0F90CE58515" box="[1286,1436,511,537]" pageId="2" pageNumber="287" value="2010-08-18">18 Aug. 2010</collectingDate>
</date>
(leg. 
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. 
<collectorName id="269F5366FFBF252669C7B325080A8532" box="[233,371,547,574]" pageId="2" pageNumber="287">A. Gusakov</collectorName>
)
</materialsCitation>
.
</paragraph>
<paragraph id="8BD536B0FFBF252669E9B341083C85FE" blockId="2.[151,1437,259,754]" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF252669E9B34108D3856D" bold="true" box="[199,426,583,609]" pageId="2" pageNumber="287">Additional locality.</emphasis>
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<typeStatus id="54D18812FFBF252668CFB34E0B38856E" box="[481,577,584,610]" pageId="2" pageNumber="287" type="paratype">paratype</typeStatus>
was found in Đồng 
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, 
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, shallow floodplain 
<collectingCounty id="62B44E3CFFBF252669B9B36D083A8589" box="[151,323,619,645]" pageId="2" pageNumber="287">lake Bàu Chim</collectingCounty>
, plant-filled (young trees of acacias) residual pool in central part of the almost completely dried up lake’s water area (
<geoCoordinate id="EE5E5077FFBF2526684BB389088685A5" box="[357,511,655,681]" degrees="11" direction="north" minutes="28.826" orientation="latitude" pageId="2" pageNumber="287" precision="1" value="11.480433">N 11°28.826'</geoCoordinate>
, 
<geoCoordinate id="EE5E5077FFBF25266B24B3960BD685A6" box="[522,687,655,682]" degrees="107" direction="east" minutes="22.641" orientation="longitude" pageId="2" pageNumber="287" precision="1" value="107.37735">E 107°22.641'</geoCoordinate>
), altitude 
<elevation id="0047D183FFBF25266A31B3890AE985A5" box="[799,912,655,682]" metricMagnitude="2" metricUnit="m" metricValue="1.3199999999999998" pageId="2" pageNumber="287" unit="m" value="132.0">
<quantity id="4C929B55FFBF25266A31B3890A1F85A6" box="[799,870,655,682]" metricMagnitude="2" metricUnit="m" metricValue="1.3199999999999998" pageId="2" pageNumber="287" unit="m" value="132.0">132 m</quantity>
asl
</elevation>
, depth 
<quantity id="4C929B55FFBF25266ACDB3890D4D85A6" box="[995,1076,655,682]" metricMagnitude="-1" metricUnit="m" metricValue="1.5" pageId="2" pageNumber="287" unit="m" value="0.15">
<elevation id="0047D183FFBF25266ACDB3890D4D85A6" box="[995,1076,655,682]" metricMagnitude="-1" metricUnit="m" metricValue="1.5" pageId="2" pageNumber="287" unit="m" value="0.15">0.15 m</elevation>
</quantity>
, water temperature 31.3 °С, рН 6.3, conductivity 105 μS/sm, sediment type: grey clay with plant debris and rhizomes, collected 
<date id="FFD41070FFBF25266DF5B3B50C1B85C1" box="[1243,1378,691,717]" pageId="2" pageNumber="287" value="2010-09-09">
<collectingDate id="EF90E998FFBF25266DF5B3B50C1B85C1" box="[1243,1378,691,717]" pageId="2" pageNumber="287" value="2010-09-09">9 Sep. 2010</collectingDate>
</date>
(leg. 
<collectionCode id="ED7BAE75FFBF252669B9B3D109D485FD" box="[151,173,727,753]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="2" pageNumber="287" type="Museum">V</collectionCode>
. 
<collectorName id="269F5366FFBF2526699EB3D1084385FE" box="[176,314,727,754]" pageId="2" pageNumber="287">A. Gusakov</collectorName>
)
</materialsCitation>
.
</paragraph>
</subSubSection>
<caption id="DF156638FFBF252669B9B22708A684C5" ID-Table-UUID="DF156638FFBF252669B9B22708A684C5" httpUri="http://table.plazi.org/id/DF156638FFBF252669B9B22708A684C5" pageId="2" pageNumber="287" startId="2.[151,239,801,825]" targetBox="[163,1422,985,1390]" targetIsTable="true" targetPageId="2">
<paragraph id="8BD536B0FFBF252669B9B22708A684C5" blockId="2.[151,1437,801,969]" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF252669B9B22708738435" bold="true" box="[151,266,801,825]" pageId="2" pageNumber="287">TABLE 1.</emphasis>
Composition and length of the chaetae of 
<taxonomicName id="4C6A4D33FFBF25266BFFB2270AAF8435" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[721,982,801,825]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="2" pageNumber="287" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFBF25266BFFB2270AAF8435" box="[721,982,801,825]" italics="true" pageId="2" pageNumber="287">Aeolosoma vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFBF25266AF3B2270D608435" bold="true" box="[989,1049,801,825]" pageId="2" pageNumber="287">
<taxonomicNameLabel id="A22D57D9FFBF25266AF3B2270D608435" box="[989,1049,801,825]" pageId="2" pageNumber="287" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
DH: dorsal hair chaetae, DS: dorsal sigmoid chaetae, VH: ventral hair chaetae; VS: ventral sigmoid chaetae. Numerical values give length of chaetae in µm. Values before slash: left side of the body. Values behind slash: right side of the body. Number of values correspond to number of chaetae in the respective bundle. En dash: chaetae absent;?: chaetae present, but length not measurable, due to broken tip or poor visibility.
</paragraph>
</caption>
<paragraph id="8BD536B0FFBF2526698DB2DF0C158262" pageId="2" pageNumber="287">
<table id="F96AC410FFBFDADB698DB2DF0CF78262" box="[163,1422,985,1390]" gridcols="8" gridrows="11" pageId="2" pageNumber="287">
<tr id="355A34F2FFBFDADB698DB2DF0CF784E3" box="[163,1422,985,1007]" gridrow="0" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB2DF098B84E3" box="[163,242,985,1007]" gridcol="0" gridrow="0" pageId="2" pageNumber="287">Segment</th>
<th id="768B5D8EFFBFDADB6834B2DF080584E3" box="[282,380,985,1007]" gridcol="1" gridrow="0" pageId="2" pageNumber="287">II</th>
<th id="768B5D8EFFBFDADB68BBB2DF0B6184E3" box="[405,536,985,1007]" gridcol="2" gridrow="0" pageId="2" pageNumber="287">III</th>
<th id="768B5D8EFFBFDADB6B1DB2DF0B8384E3" box="[563,762,985,1007]" gridcol="3" gridrow="0" pageId="2" pageNumber="287">IV</th>
<th id="768B5D8EFFBFDADB6A3AB2DF0AE184E3" box="[788,920,985,1007]" gridcol="4" gridrow="0" pageId="2" pageNumber="287">V</th>
<th id="768B5D8EFFBFDADB6A9EB2DF0D1384E3" box="[944,1130,985,1007]" gridcol="5" gridrow="0" pageId="2" pageNumber="287">VI</th>
<th id="768B5D8EFFBFDADB6DABB2DF0C7184E3" box="[1157,1288,985,1007]" gridcol="6" gridrow="0" pageId="2" pageNumber="287">VII</th>
<th id="768B5D8EFFBFDADB6C0BB2DF0CF784E3" box="[1317,1422,985,1007]" gridcol="7" gridrow="0" pageId="2" pageNumber="287">VIII</th>
</tr>
<tr id="355A34F2FFBFDADB698DB2F90CF78318" box="[163,1422,1023,1044]" gridrow="1" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB2F90CF78318" box="[163,1422,1023,1044]" colspan="8" colspanRight="7" gridcol="0" gridrow="1" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF2526698DB2F9087B8318" bold="true" box="[163,258,1023,1044]" pageId="2" pageNumber="287">Holotype:</emphasis>
</th>
</tr>
<tr id="355A34F2FFBFDADB698DB5200CF78330" box="[163,1422,1062,1084]" gridrow="2" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB520098B8330" box="[163,242,1062,1084]" gridcol="0" gridrow="2" pageId="2" pageNumber="287">DH</th>
<td id="768B5D8EFFBFDADB6834B52008058330" box="[282,380,1062,1084]" gridcol="1" gridrow="2" pageId="2" pageNumber="287">49 / 82</td>
<td id="768B5D8EFFBFDADB68BBB5200B618330" box="[405,536,1062,1084]" gridcol="2" gridrow="2" pageId="2" pageNumber="287">? /?</td>
<td id="768B5D8EFFBFDADB6B1DB5200B838330" box="[563,762,1062,1084]" gridcol="3" gridrow="2" pageId="2" pageNumber="287">? / 71, 82</td>
<td id="768B5D8EFFBFDADB6A3AB5200AE18330" box="[788,920,1062,1084]" gridcol="4" gridrow="2" pageId="2" pageNumber="287">126 / 121, 44</td>
<td id="768B5D8EFFBFDADB6A9EB5200D138330" box="[944,1130,1062,1084]" gridcol="5" gridrow="2" pageId="2" pageNumber="287">? / 121</td>
<td id="768B5D8EFFBFDADB6DABB5200C718330" box="[1157,1288,1062,1084]" gridcol="6" gridrow="2" pageId="2" pageNumber="287">78 / 89</td>
<td id="768B5D8EFFBFDADB6C0BB5200CF78330" box="[1317,1422,1062,1084]" gridcol="7" gridrow="2" pageId="2" pageNumber="287">65 /?</td>
</tr>
<tr id="355A34F2FFBFDADB698DB54A0CF7836E" box="[163,1422,1100,1122]" gridrow="3" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB54A098B836E" box="[163,242,1100,1122]" gridcol="0" gridrow="3" pageId="2" pageNumber="287">DS</th>
<td id="768B5D8EFFBFDADB6834B54A0805836E" box="[282,380,1100,1122]" gridcol="1" gridrow="3" pageId="2" pageNumber="287">21 / 22</td>
<td id="768B5D8EFFBFDADB68BBB54A0B61836E" box="[405,536,1100,1122]" gridcol="2" gridrow="3" pageId="2" pageNumber="287">25 / 28</td>
<td id="768B5D8EFFBFDADB6B1DB54A0B83836E" box="[563,762,1100,1122]" gridcol="3" gridrow="3" pageId="2" pageNumber="287">26, 27 /?,?</td>
<td id="768B5D8EFFBFDADB6A3AB54A0AE1836E" box="[788,920,1100,1122]" gridcol="4" gridrow="3" pageId="2" pageNumber="287">31 / 30, 31</td>
<td id="768B5D8EFFBFDADB6A9EB54A0D13836E" box="[944,1130,1100,1122]" gridcol="5" gridrow="3" pageId="2" pageNumber="287">29 /?</td>
<td id="768B5D8EFFBFDADB6DABB54A0C71836E" box="[1157,1288,1100,1122]" gridcol="6" gridrow="3" pageId="2" pageNumber="287">29 / 31</td>
<td id="768B5D8EFFBFDADB6C0BB54A0CF7836E" box="[1317,1422,1100,1122]" gridcol="7" gridrow="3" pageId="2" pageNumber="287">26 / 27</td>
</tr>
<tr id="355A34F2FFBFDADB698DB5750CF78385" box="[163,1422,1139,1161]" gridrow="4" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB575098B8385" box="[163,242,1139,1161]" gridcol="0" gridrow="4" pageId="2" pageNumber="287">VH</th>
<td id="768B5D8EFFBFDADB6834B57508058385" box="[282,380,1139,1161]" gridcol="1" gridrow="4" pageId="2" pageNumber="287">49 / –</td>
<td id="768B5D8EFFBFDADB68BBB5750B618385" box="[405,536,1139,1161]" gridcol="2" gridrow="4" pageId="2" pageNumber="287">65 /?</td>
<td id="768B5D8EFFBFDADB6B1DB5750B838385" box="[563,762,1139,1161]" gridcol="3" gridrow="4" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6A3AB5750AE18385" box="[788,920,1139,1161]" gridcol="4" gridrow="4" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6A9EB5750D138385" box="[944,1130,1139,1161]" gridcol="5" gridrow="4" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6DABB5750C718385" box="[1157,1288,1139,1161]" gridcol="6" gridrow="4" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6C0BB5750CF78385" box="[1317,1422,1139,1161]" gridcol="7" gridrow="4" pageId="2" pageNumber="287">–</td>
</tr>
<tr id="355A34F2FFBFDADB698DB59F0CF783A2" box="[163,1422,1177,1198]" gridrow="5" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB59F098B83A2" box="[163,242,1177,1198]" gridcol="0" gridrow="5" pageId="2" pageNumber="287">VS</th>
<td id="768B5D8EFFBFDADB6834B59F080583A2" box="[282,380,1177,1198]" gridcol="1" gridrow="5" pageId="2" pageNumber="287">23 / 20, 20</td>
<td id="768B5D8EFFBFDADB68BBB59F0B6183A2" box="[405,536,1177,1198]" gridcol="2" gridrow="5" pageId="2" pageNumber="287">?,? / 32,?,?</td>
<td id="768B5D8EFFBFDADB6B1DB59F0B8383A2" box="[563,762,1177,1198]" gridcol="3" gridrow="5" pageId="2" pageNumber="287">29, 30, 31 / 31, 31, 32</td>
<td id="768B5D8EFFBFDADB6A3AB59F0AE183A2" box="[788,920,1177,1198]" gridcol="4" gridrow="5" pageId="2" pageNumber="287">32, 32 / 31, 33</td>
<td id="768B5D8EFFBFDADB6A9EB59F0D1383A2" box="[944,1130,1177,1198]" gridcol="5" gridrow="5" pageId="2" pageNumber="287">30, 32, 32 / 31, 32,?</td>
<td id="768B5D8EFFBFDADB6DABB59F0C7183A2" box="[1157,1288,1177,1198]" gridcol="6" gridrow="5" pageId="2" pageNumber="287">31, 31 / 30, 31</td>
<td id="768B5D8EFFBFDADB6C0BB59F0CF783A2" box="[1317,1422,1177,1198]" gridcol="7" gridrow="5" pageId="2" pageNumber="287">34, 34 /?,?</td>
</tr>
<tr id="355A34F2FFBFDADB698DB5B90CF783D8" box="[163,1422,1215,1236]" gridrow="6" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB5B90CF783D8" box="[163,1422,1215,1236]" colspan="8" colspanRight="7" gridcol="0" gridrow="6" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF2526698DB5B9087B83D8" bold="true" box="[163,258,1215,1236]" pageId="2" pageNumber="287">Paratype:</emphasis>
</th>
</tr>
<tr id="355A34F2FFBFDADB698DB5E00CF783F0" box="[163,1422,1254,1276]" gridrow="7" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB5E0098B83F0" box="[163,242,1254,1276]" gridcol="0" gridrow="7" pageId="2" pageNumber="287">DH</th>
<td id="768B5D8EFFBFDADB6834B5E0080583F0" box="[282,380,1254,1276]" gridcol="1" gridrow="7" pageId="2" pageNumber="287">52 / 53</td>
<td id="768B5D8EFFBFDADB68BBB5E00B6183F0" box="[405,536,1254,1276]" gridcol="2" gridrow="7" pageId="2" pageNumber="287">113 / 110</td>
<td id="768B5D8EFFBFDADB6B1DB5E00B8383F0" box="[563,762,1254,1276]" gridcol="3" gridrow="7" pageId="2" pageNumber="287">156 / 166</td>
<td id="768B5D8EFFBFDADB6A3AB5E00AE183F0" box="[788,920,1254,1276]" gridcol="4" gridrow="7" pageId="2" pageNumber="287">125 /?</td>
<td id="768B5D8EFFBFDADB6A9EB5E00D1383F0" box="[944,1130,1254,1276]" gridcol="5" gridrow="7" pageId="2" pageNumber="287">82 /?</td>
<td id="768B5D8EFFBFDADB6DABB5E00C7183F0" box="[1157,1288,1254,1276]" gridcol="6" gridrow="7" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6C0BB5E00CF783F0" box="[1317,1422,1254,1276]" gridcol="7" gridrow="7" pageId="2" pageNumber="287">–</td>
</tr>
<tr id="355A34F2FFBFDADB698DB40A0CF7822E" box="[163,1422,1292,1314]" gridrow="8" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB40A098B822E" box="[163,242,1292,1314]" gridcol="0" gridrow="8" pageId="2" pageNumber="287">DS</th>
<td id="768B5D8EFFBFDADB6834B40A0805822E" box="[282,380,1292,1314]" gridcol="1" gridrow="8" pageId="2" pageNumber="287">24 / 25</td>
<td id="768B5D8EFFBFDADB68BBB40A0B61822E" box="[405,536,1292,1314]" gridcol="2" gridrow="8" pageId="2" pageNumber="287">30 / 32</td>
<td id="768B5D8EFFBFDADB6B1DB40A0B83822E" box="[563,762,1292,1314]" gridcol="3" gridrow="8" pageId="2" pageNumber="287">30 / 30</td>
<td id="768B5D8EFFBFDADB6A3AB40A0AE1822E" box="[788,920,1292,1314]" gridcol="4" gridrow="8" pageId="2" pageNumber="287">32 / 33</td>
<td id="768B5D8EFFBFDADB6A9EB40A0D13822E" box="[944,1130,1292,1314]" gridcol="5" gridrow="8" pageId="2" pageNumber="287">31 / 32</td>
<td id="768B5D8EFFBFDADB6DABB40A0C71822E" box="[1157,1288,1292,1314]" gridcol="6" gridrow="8" pageId="2" pageNumber="287">28 / 28</td>
<td id="768B5D8EFFBFDADB6C0BB40A0CF7822E" box="[1317,1422,1292,1314]" gridcol="7" gridrow="8" pageId="2" pageNumber="287">–</td>
</tr>
<tr id="355A34F2FFBFDADB698DB4340CF78244" box="[163,1422,1330,1352]" gridrow="9" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB434098B8244" box="[163,242,1330,1352]" gridcol="0" gridrow="9" pageId="2" pageNumber="287">VH</th>
<td id="768B5D8EFFBFDADB6834B43408058244" box="[282,380,1330,1352]" gridcol="1" gridrow="9" pageId="2" pageNumber="287">56 /?</td>
<td id="768B5D8EFFBFDADB68BBB4340B618244" box="[405,536,1330,1352]" gridcol="2" gridrow="9" pageId="2" pageNumber="287">– / 88</td>
<td id="768B5D8EFFBFDADB6B1DB4340B838244" box="[563,762,1330,1352]" gridcol="3" gridrow="9" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6A3AB4340AE18244" box="[788,920,1330,1352]" gridcol="4" gridrow="9" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6A9EB4340D138244" box="[944,1130,1330,1352]" gridcol="5" gridrow="9" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6DABB4340C718244" box="[1157,1288,1330,1352]" gridcol="6" gridrow="9" pageId="2" pageNumber="287">–</td>
<td id="768B5D8EFFBFDADB6C0BB4340CF78244" box="[1317,1422,1330,1352]" gridcol="7" gridrow="9" pageId="2" pageNumber="287">–</td>
</tr>
<tr id="355A34F2FFBFDADB698DB45F0CF78262" box="[163,1422,1369,1390]" gridrow="10" pageId="2" pageNumber="287">
<th id="768B5D8EFFBFDADB698DB45F098B8262" box="[163,242,1369,1390]" gridcol="0" gridrow="10" pageId="2" pageNumber="287">VS</th>
<td id="768B5D8EFFBFDADB6834B45F08058262" box="[282,380,1369,1390]" gridcol="1" gridrow="10" pageId="2" pageNumber="287">27 /?</td>
<td id="768B5D8EFFBFDADB68BBB45F0B618262" box="[405,536,1369,1390]" gridcol="2" gridrow="10" pageId="2" pageNumber="287">27, 27 / 24, 27</td>
<td id="768B5D8EFFBFDADB6B1DB45F0B838262" box="[563,762,1369,1390]" gridcol="3" gridrow="10" pageId="2" pageNumber="287">32, 34 / 34</td>
<td id="768B5D8EFFBFDADB6A3AB45F0AE18262" box="[788,920,1369,1390]" gridcol="4" gridrow="10" pageId="2" pageNumber="287">32, 33 / 31, 32</td>
<td id="768B5D8EFFBFDADB6A9EB45F0D138262" box="[944,1130,1369,1390]" gridcol="5" gridrow="10" pageId="2" pageNumber="287">31, 32 / 33, 34</td>
<td id="768B5D8EFFBFDADB6DABB45F0C718262" box="[1157,1288,1369,1390]" gridcol="6" gridrow="10" pageId="2" pageNumber="287">32,? / 33,?</td>
<td id="768B5D8EFFBFDADB6C0BB45F0CF78262" box="[1317,1422,1369,1390]" gridcol="7" gridrow="10" pageId="2" pageNumber="287">? /?</td>
</tr>
</table>
</paragraph>
<subSubSection id="C370653BFFBF252669E9B4C50A9482D1" box="[199,1005,1475,1501]" pageId="2" pageNumber="287" type="etymology">
<paragraph id="8BD536B0FFBF252669E9B4C50A9482D1" blockId="2.[151,1437,1475,2041]" box="[199,1005,1475,1501]" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF252669E9B4C5083782D1" bold="true" box="[199,334,1475,1501]" pageId="2" pageNumber="287">Etymology.</emphasis>
The specific epithet means “Vietnamese”, “from 
<collectingCountry id="F37D7620FFBF25266A54B4C50AA682D1" box="[890,991,1475,1501]" name="Vietnam" pageId="2" pageNumber="287">Vietnam</collectingCountry>
”.
</paragraph>
</subSubSection>
<subSubSection id="C370653BFFBF252069E9B4E00B8F87F5" lastPageId="4" lastPageNumber="289" pageId="2" pageNumber="287" type="description">
<paragraph id="8BD536B0FFBF252669E9B4E00D9E8161" blockId="2.[151,1437,1475,2041]" pageId="2" pageNumber="287">
<emphasis id="B91EEAA2FFBF252669E9B4E00820810C" bold="true" box="[199,345,1510,1536]" pageId="2" pageNumber="287">Description.</emphasis>
Both specimens, 
<typeStatus id="54D18812FFBF25266B0AB4E10BFF810D" box="[548,646,1511,1537]" pageId="2" pageNumber="287" type="holotype">holotype</typeStatus>
and 
<typeStatus id="54D18812FFBF25266BEEB4E10A5A810D" box="[704,803,1511,1537]" pageId="2" pageNumber="287" type="paratype">paratype</typeStatus>
, have seven chaetiferous segments, a length of 400 and 350 µm, and a maximum diameter of 62 and 68 µm (in segments III–IV), respectively. No signs of a clitellum or budding zones were detected. Epidermal glands are present, but poorly visible and colorless in fixed state. The structural details of the head (body end to the left in 
<figureCitation id="13512A35FFBF25266BCCB7550A418161" box="[738,824,1619,1645]" captionStart="FIGURE 1" captionStartId="1.[151,250,1580,1604]" captionTargetBox="[151,1435,453,1554]" captionTargetId="figure-119@1.[151,1435,453,1556]" captionTargetPageId="1" captionText="FIGURE 1. Details of the morphology of Aeolosoma vietnamicum sp. n. A. Entire body of holotype, lateral view; head to the left. B. Bundle of ventral sigmoid chaetae. C. Serrated hair chaeta, detail. D. A dorsal bundle with two hair chaetae and two sigmoid chaetae. E. Drawing of ventral sigmoid chaeta, lateral view. F, G. Tips of the ventral sigmoid chaetae, lateral view. H. Tip of the ventral sigmoid chaeta, frontal view from the concave side. I, J. Tips of dorsal sigmoid chaetae, lateral view." figureDoi="http://doi.org/10.5281/zenodo.5744734" httpUri="https://zenodo.org/record/5744734/files/figure.png" pageId="2" pageNumber="287">Fig. 1A</figureCitation>
) and internal organs are indiscernible.
</paragraph>
<paragraph id="8BD536B0FFBF252669E9B7710C73802D" blockId="2.[151,1437,1475,2041]" pageId="2" pageNumber="287">
Dorsal and ventral chaetal bundles bear hairs and sigmoid chaetae. Hair chaetae are present in most dorsal bundles and in the ventral bundles of the first two chaetiferous segments (II, III; the 1st segment is without chaetae in 
<taxonomicName id="4C6A4D33FFBF25266999B7B9084A81D5" authorityName="Ehrenberg" authorityYear="1828" box="[183,307,1727,1753]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="2" pageNumber="287" phylum="Annelida" rank="genus">
<emphasis id="B91EEAA2FFBF25266999B7B9084A81D5" box="[183,307,1727,1753]" italics="true" pageId="2" pageNumber="287">Aeolosoma</emphasis>
</taxonomicName>
). One, rarely two, hairs per bundle, length 49–166 µm, thickness up to c. 1 µm proximally. The longest hairs are in the dorsal bundles of the mid-body. All hair chaetae are almost straight. Most of them are roughly serrated, especially in the distal half; less often, the serration is poorly visible (
<tableCitation id="C6E8030BFFBF25266D28B6010D25802D" box="[1030,1116,1799,1825]" captionStart="TABLE 1" captionStartId="2.[151,239,801,825]" captionTargetPageId="2" captionText="TABLE 1. Composition and length of the chaetae of Aeolosoma vietnamicum sp. n. DH: dorsal hair chaetae, DS: dorsal sigmoid chaetae, VH: ventral hair chaetae; VS: ventral sigmoid chaetae. Numerical values give length of chaetae in µm. Values before slash: left side of the body. Values behind slash: right side of the body. Number of values correspond to number of chaetae in the respective bundle. En dash: chaetae absent;?: chaetae present, but length not measurable, due to broken tip or poor visibility." httpUri="http://table.plazi.org/id/DF156638FFBF252669B9B22708A684C5" pageId="2" pageNumber="287" tableUuid="DF156638FFBF252669B9B22708A684C5">Table 1</tableCitation>
; 
<figureCitation id="13512A35FFBF25266D44B6010D84802D" box="[1130,1277,1799,1825]" captionStart="FIGURE 1" captionStartId="1.[151,250,1580,1604]" captionTargetBox="[151,1435,453,1554]" captionTargetId="figure-119@1.[151,1435,453,1556]" captionTargetPageId="1" captionText="FIGURE 1. Details of the morphology of Aeolosoma vietnamicum sp. n. A. Entire body of holotype, lateral view; head to the left. B. Bundle of ventral sigmoid chaetae. C. Serrated hair chaeta, detail. D. A dorsal bundle with two hair chaetae and two sigmoid chaetae. E. Drawing of ventral sigmoid chaeta, lateral view. F, G. Tips of the ventral sigmoid chaetae, lateral view. H. Tip of the ventral sigmoid chaeta, frontal view from the concave side. I, J. Tips of dorsal sigmoid chaetae, lateral view." figureDoi="http://doi.org/10.5281/zenodo.5744734" httpUri="https://zenodo.org/record/5744734/files/figure.png" pageId="2" pageNumber="287">Fig. 1 A,C,D</figureCitation>
).
</paragraph>
<paragraph id="8BD536B0FFBF252069E9B62D0B8F87F5" blockId="2.[151,1437,1475,2041]" lastBlockId="4.[151,1437,151,1869]" lastPageId="4" lastPageNumber="289" pageId="2" pageNumber="287">
Sigmoid chaetae are one to three per bundle, more numerous on the ventral side, absent in the last segment of the 
<typeStatus id="54D18812FFBF252669EFB64908588065" box="[193,289,1871,1897]" pageId="2" pageNumber="287" type="paratype">paratype</typeStatus>
on the dorsal side. Their length varies within 20–34 µm, the shortest ones are noted in the bundles of segment II (
<tableCitation id="C6E8030BFFBF2526680EB675080C8081" box="[288,373,1907,1933]" captionStart="TABLE 1" captionStartId="2.[151,239,801,825]" captionTargetPageId="2" captionText="TABLE 1. Composition and length of the chaetae of Aeolosoma vietnamicum sp. n. DH: dorsal hair chaetae, DS: dorsal sigmoid chaetae, VH: ventral hair chaetae; VS: ventral sigmoid chaetae. Numerical values give length of chaetae in µm. Values before slash: left side of the body. Values behind slash: right side of the body. Number of values correspond to number of chaetae in the respective bundle. En dash: chaetae absent;?: chaetae present, but length not measurable, due to broken tip or poor visibility." httpUri="http://table.plazi.org/id/DF156638FFBF252669B9B22708A684C5" pageId="2" pageNumber="287" tableUuid="DF156638FFBF252669B9B22708A684C5">Table 1</tableCitation>
). All chaetae are more or less s-shaped, with a sickle-like distal third. Their greatest width is observed in the middle of the curved distal part. Ventral chaetae are usually somewhat thicker than dorsal ones: up to 1.5 μm 
<emphasis id="B91EEAA2FFBF25266824B6BA085080D9" box="[266,297,1980,2005]" italics="true" pageId="2" pageNumber="287">vs.</emphasis>
1.0 μm. The tips of all sigmoid chaetae are bifid, with small but clearly distinguishable teeth, and the upper tooth about twice as thin and short as the lower. On the concave side of the chaetae, under the lower apical tooth, there is a row of 3 to 9 roughly equal-sized denticles, comparable in size to the upper apical tooth. As a rule, the dorsal sigmoid chaetae have fewer of these denticles than the ventral chaetae (usually 6–7, but in single cases no more than 3–4 
<emphasis id="B91EEAA2FFB92520686EB1D9082787F4" box="[320,350,223,248]" italics="true" pageId="4" pageNumber="289">vs.</emphasis>
8–9, respectively) (
<figureCitation id="13512A35FFB925206B13B1D90B9387F5" box="[573,746,223,249]" captionStart="FIGURE 1" captionStartId="1.[151,250,1580,1604]" captionTargetBox="[151,1435,453,1554]" captionTargetId="figure-119@1.[151,1435,453,1556]" captionTargetPageId="1" captionText="FIGURE 1. Details of the morphology of Aeolosoma vietnamicum sp. n. A. Entire body of holotype, lateral view; head to the left. B. Bundle of ventral sigmoid chaetae. C. Serrated hair chaeta, detail. D. A dorsal bundle with two hair chaetae and two sigmoid chaetae. E. Drawing of ventral sigmoid chaeta, lateral view. F, G. Tips of the ventral sigmoid chaetae, lateral view. H. Tip of the ventral sigmoid chaeta, frontal view from the concave side. I, J. Tips of dorsal sigmoid chaetae, lateral view." figureDoi="http://doi.org/10.5281/zenodo.5744734" httpUri="https://zenodo.org/record/5744734/files/figure.png" pageId="4" pageNumber="289">Fig. 1 B,D,E–J</figureCitation>
).
</paragraph>
</subSubSection>
<caption id="DF156638FFBE252769B9B0F508AF853D" ID-Table-UUID="DF156638FFBE252769B9B0F508AF853D" httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="3" pageNumber="288" startId="3.[151,239,499,525]" targetBox="[165,2017,576,1691]" targetIsTable="true" targetPageId="3">
<paragraph id="8BD536B0FFBE252769B9B0F508AF853D" blockId="3.[151,2038,499,561]" pageId="3" pageNumber="288">
<emphasis id="B91EEAA2FFBE252769B9B0F508708501" bold="true" box="[151,265,499,525]" pageId="3" pageNumber="288">TABLE 2.</emphasis>
Comparison of 
<taxonomicName id="4C6A4D33FFBE2527689AB0F50BC08501" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[436,697,499,525]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFBE2527689AB0F50BC08501" box="[436,697,499,525]" italics="true" pageId="3" pageNumber="288">Aeolosoma vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFBE25276B91B0F50B838501" bold="true" box="[703,762,499,525]" pageId="3" pageNumber="288">
<taxonomicNameLabel id="A22D57D9FFBE25276B91B0F50B838501" box="[703,762,499,525]" pageId="3" pageNumber="288" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined).
</paragraph>
</caption>
<paragraph id="8BD536B0FFBE2527698BB3460E7D8197" pageId="3" pageNumber="288">
<table id="F96AC410FFBEDADB698BB3460E988197" box="[165,2017,576,1691]" gridcols="7" gridrows="12" pageId="3" pageNumber="288">
<tr id="355A34F2FFBEDADB698BB3460E988555" box="[165,2017,576,601]" gridrow="0" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB34608F98555" box="[165,384,576,601]" gridcol="0" gridrow="0" pageId="3" pageNumber="288">Characteristic</th>
<th id="768B5D8EFFBEDADB688BB3460BEF8555" box="[421,662,576,601]" gridcol="1" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE2527688BB3460B3B8555" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[421,578,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFBE2527688BB3460B3B8555" box="[421,578,576,601]" italics="true" pageId="3" pageNumber="288">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFBE25276B67B3460BFB8555" bold="true" box="[585,642,576,601]" pageId="3" pageNumber="288">
<taxonomicNameLabel id="A22D57D9FFBE25276B67B3460BFB8555" box="[585,642,576,601]" pageId="3" pageNumber="288" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
</th>
<th id="768B5D8EFFBEDADB6B94B3460AF78555" box="[698,910,576,601]" gridcol="2" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE25276B94B3460A528555" authorityName="Marcus" authorityYear="1944" box="[698,811,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="corderoi">A. corderoi</taxonomicName>
</th>
<th id="768B5D8EFFBEDADB6A9CB3460DE68555" box="[946,1183,576,601]" gridcol="3" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE25276A9CB3460D5B8555" authorityName="Marcus" authorityYear="1944" box="[946,1058,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="evelinae">A. evelinae</taxonomicName>
</th>
<th id="768B5D8EFFBEDADB6DE6B3460CC28555" box="[1224,1467,576,601]" gridcol="4" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE25276DE6B3460C4E8555" authorityName="Marcus" authorityYear="1944" box="[1224,1335,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="sawayai">A. sawayai</taxonomicName>
</th>
<th id="768B5D8EFFBEDADB6CF3B3460FC48555" box="[1501,1725,576,601]" gridcol="5" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE25276CF3B3460F168555" authorityName="Vejdovsky" authorityYear="1884" box="[1501,1647,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="tenebrarum">A. tenebrarum</taxonomicName>
</th>
<th id="768B5D8EFFBEDADB6FF0B3460E988555" box="[1758,2017,576,601]" gridcol="6" gridrow="0" pageId="3" pageNumber="288">
<taxonomicName id="4C6A4D33FFBE25276FF0B3460EF38555" authorityName="Aiyer" authorityYear="1926" box="[1758,1930,576,601]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="3" pageNumber="288" phylum="Annelida" rank="species" species="travancorense">
<emphasis id="B91EEAA2FFBE25276FF0B3460EF38555" box="[1758,1930,576,601]" italics="true" pageId="3" pageNumber="288">A. travancorense</emphasis>
</taxonomicName>
</th>
</tr>
<tr id="355A34F2FFBEDADB698BB36E0E9885E1" box="[165,2017,616,749]" gridrow="1" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB36E08F985E1" box="[165,384,616,749]" gridcol="0" gridrow="1" pageId="3" pageNumber="288">References:</th>
<td id="768B5D8EFFBEDADB688BB36E0BEF85E1" box="[421,662,616,749]" gridcol="1" gridrow="1" pageId="3" pageNumber="288">This study</td>
<td id="768B5D8EFFBEDADB6B94B36E0AF785E1" box="[698,910,616,749]" gridcol="2" gridrow="1" pageId="3" pageNumber="288">Du Bois-Reymond Marcus 1944; Bunke 1967; Brinkhurst &amp; Jamieson 1971</td>
<td id="768B5D8EFFBEDADB6A9CB36E0DE685E1" box="[946,1183,616,749]" gridcol="3" gridrow="1" pageId="3" pageNumber="288">
<bibRefCitation id="EFFB4B41FFBE25276A9CB36E0D42858D" author="Du Bois-Reymond Marcus, E." box="[946,1083,616,641]" pageId="3" pageNumber="288" pagination="1 - 8" refId="ref3871" refString="Du Bois-Reymond Marcus, E. (1944) Notes on Fresh-water Oligochaeta from Brazil. Comunicaciones zoologicas del Museo de Historia Natural de Montevideo, 1 (20), 1 - 8." type="journal article" year="1944">Marcus 1944</bibRefCitation>
; Bunke 
<bibRefCitation id="EFFB4B41FFBE25276A9CB38A0A9185A9" author="Bunke, D." box="[946,1000,652,677]" pageId="3" pageNumber="288" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">1967</bibRefCitation>
; Brinkhurst &amp; 
<bibRefCitation id="EFFB4B41FFBE25276A9CB3B60D3485C5" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[946,1101,688,713]" pageId="3" pageNumber="288" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Jamieson 1971</bibRefCitation>
; Timm 2009
</td>
<td id="768B5D8EFFBEDADB6DE6B36E0CC285E1" box="[1224,1467,616,749]" gridcol="4" gridrow="1" pageId="3" pageNumber="288">Marcus 1944; Bunke 1967; Brinkhurst &amp; Jamieson 1971; Timm 2009</td>
<td id="768B5D8EFFBEDADB6CF3B36E0FC485E1" box="[1501,1725,616,749]" gridcol="5" gridrow="1" pageId="3" pageNumber="288">
<bibRefCitation id="EFFB4B41FFBE25276CF3B36E0F25858D" author="Bunke, D." box="[1501,1628,616,641]" pageId="3" pageNumber="288" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
; Brinkhurst &amp; Jamie- son 1971; 
<bibRefCitation id="EFFB4B41FFBE25276F68B3B60FC485C5" author="Timm, T." box="[1606,1725,688,713]" pageId="3" pageNumber="288" pagination="1 - 235" refId="ref4277" refString="Timm, T. (2009) A guide to the freshwater Oligochaeta and Polychaeta of Northern and Central Europe. Lauterbornia, 66, 1 - 235." type="journal article" year="2009">Timm 2009</bibRefCitation>
</td>
<td id="768B5D8EFFBEDADB6FF0B36E0E9885E1" box="[1758,2017,616,749]" gridcol="6" gridrow="1" pageId="3" pageNumber="288">
Aiyer 1926; 
<bibRefCitation id="EFFB4B41FFBE25276E70B36E0EA5858D" author="Bunke, D." box="[1886,2012,616,641]" pageId="3" pageNumber="288" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
; Brinkhurst &amp; Jamieson 1971; 
<bibRefCitation id="EFFB4B41FFBE25276E30B3B60EE185C5" author="Naidu, K. V." box="[1822,1944,688,713]" pageId="3" pageNumber="288" refId="ref4183" refString="Naidu, K. V. (2005) The Fauna of India and the adjacent countries. Aquatic Oligochaeta. Zoological Survey of India, Kolkata, 294 pp." type="book" year="2005">Naidu 2005</bibRefCitation>
; Timm 2009
</td>
</tr>
<tr id="355A34F2FFBEDADB698BB3FA0E988419" box="[165,2017,764,789]" gridrow="2" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB3FA0E988419" box="[165,2017,764,789]" colspan="7" colspanRight="6" gridcol="0" gridrow="2" pageId="3" pageNumber="288">Sigmoid chaetae:</th>
</tr>
<tr id="355A34F2FFBEDADB698BB2220E9884A5" box="[165,2017,804,937]" gridrow="3" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB22208F984A5" box="[165,384,804,937]" gridcol="0" gridrow="3" pageId="3" pageNumber="288">Location</th>
<td id="768B5D8EFFBEDADB688BB2220BEF84A5" box="[421,662,804,937]" gridcol="1" gridrow="3" pageId="3" pageNumber="288">dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6B94B2220AF784A5" box="[698,910,804,937]" gridcol="2" gridrow="3" pageId="3" pageNumber="288">dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6A9CB2220DE684A5" box="[946,1183,804,937]" gridcol="3" gridrow="3" pageId="3" pageNumber="288">ventral bundles only</td>
<td id="768B5D8EFFBEDADB6DE6B2220CC284A5" box="[1224,1467,804,937]" gridcol="4" gridrow="3" pageId="3" pageNumber="288">dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6CF3B2220FC484A5" box="[1501,1725,804,937]" gridcol="5" gridrow="3" pageId="3" pageNumber="288">dorsal and ventral bundles, or ventral bundles only, or absent</td>
<td id="768B5D8EFFBEDADB6FF0B2220E9884A5" box="[1758,2017,804,937]" gridcol="6" gridrow="3" pageId="3" pageNumber="288">dorsal and ventral bundles</td>
</tr>
<tr id="355A34F2FFBEDADB698BB2BF0E9884FA" box="[165,2017,953,1014]" gridrow="4" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB2BF08F984FA" box="[165,384,953,1014]" gridcol="0" gridrow="4" pageId="3" pageNumber="288">Starting position</th>
<td id="768B5D8EFFBEDADB688BB2BF0BEF84FA" box="[421,662,953,1014]" gridcol="1" gridrow="4" pageId="3" pageNumber="288">from II</td>
<td id="768B5D8EFFBEDADB6B94B2BF0AF784FA" box="[698,910,953,1014]" gridcol="2" gridrow="4" pageId="3" pageNumber="288">from III (rarely IV)</td>
<td id="768B5D8EFFBEDADB6A9CB2BF0DE684FA" box="[946,1183,953,1014]" gridcol="3" gridrow="4" pageId="3" pageNumber="288">from II; at times from III or more posteriorly</td>
<td id="768B5D8EFFBEDADB6DE6B2BF0CC284FA" box="[1224,1467,953,1014]" gridcol="4" gridrow="4" pageId="3" pageNumber="288">from III</td>
<td id="768B5D8EFFBEDADB6CF3B2BF0FC484FA" box="[1501,1725,953,1014]" gridcol="5" gridrow="4" pageId="3" pageNumber="288">from IV–V</td>
<td id="768B5D8EFFBEDADB6FF0B2BF0E9884FA" box="[1758,2017,953,1014]" gridcol="6" gridrow="4" pageId="3" pageNumber="288">from III</td>
</tr>
<tr id="355A34F2FFBEDADB698BB5030E988312" box="[165,2017,1029,1054]" gridrow="5" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB50308F98312" box="[165,384,1029,1054]" gridcol="0" gridrow="5" pageId="3" pageNumber="288">Length [µm]</th>
<td id="768B5D8EFFBEDADB688BB5030BEF8312" box="[421,662,1029,1054]" gridcol="1" gridrow="5" pageId="3" pageNumber="288">20–34</td>
<td id="768B5D8EFFBEDADB6B94B5030AF78312" box="[698,910,1029,1054]" gridcol="2" gridrow="5" pageId="3" pageNumber="288">40–46</td>
<td id="768B5D8EFFBEDADB6A9CB5030DE68312" box="[946,1183,1029,1054]" gridcol="3" gridrow="5" pageId="3" pageNumber="288">28–40</td>
<td id="768B5D8EFFBEDADB6DE6B5030CC28312" box="[1224,1467,1029,1054]" gridcol="4" gridrow="5" pageId="3" pageNumber="288">28–35</td>
<td id="768B5D8EFFBEDADB6CF3B5030FC48312" box="[1501,1725,1029,1054]" gridcol="5" gridrow="5" pageId="3" pageNumber="288">50–60</td>
<td id="768B5D8EFFBEDADB6FF0B5030E988312" box="[1758,2017,1029,1054]" gridcol="6" gridrow="5" pageId="3" pageNumber="288">30–45</td>
</tr>
<tr id="355A34F2FFBEDADB698BB52B0E9883F6" box="[165,2017,1069,1274]" gridrow="6" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB52B08F983F6" box="[165,384,1069,1274]" gridcol="0" gridrow="6" pageId="3" pageNumber="288">Tip type</th>
<td id="768B5D8EFFBEDADB688BB52B0BEF83F6" box="[421,662,1069,1274]" gridcol="1" gridrow="6" pageId="3" pageNumber="288">bifid, with distinct apical teeth clearly dif- ferentiated into distal (upper) and proximal (lower)</td>
<td id="768B5D8EFFBEDADB6B94B52B0AF783F6" box="[698,910,1069,1274]" gridcol="2" gridrow="6" pageId="3" pageNumber="288">simple-pointed</td>
<td id="768B5D8EFFBEDADB6A9CB52B0DE683F6" box="[946,1183,1069,1274]" gridcol="3" gridrow="6" pageId="3" pageNumber="288">simple-pointed</td>
<td id="768B5D8EFFBEDADB6DE6B52B0CC283F6" box="[1224,1467,1069,1274]" gridcol="4" gridrow="6" pageId="3" pageNumber="288">bifid, with very small (at times not visible) adjacent apical teeth that cannot be clearly identified as distal or proximal</td>
<td id="768B5D8EFFBEDADB6CF3B52B0FC483F6" box="[1501,1725,1069,1274]" gridcol="5" gridrow="6" pageId="3" pageNumber="288">bifid or simple- pointed (according to different sources)</td>
<td id="768B5D8EFFBEDADB6FF0B52B0E9883F6" box="[1758,2017,1069,1274]" gridcol="6" gridrow="6" pageId="3" pageNumber="288">simple-pointed, with an elongate, pointed, bristle- like apical tooth</td>
</tr>
<tr id="355A34F2FFBEDADB698BB40F0E988282" box="[165,2017,1289,1422]" gridrow="7" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB40F08F98282" box="[165,384,1289,1422]" gridcol="0" gridrow="7" pageId="3" pageNumber="288">Denticles on concave side of distal part</th>
<td id="768B5D8EFFBEDADB688BB40F0BEF8282" box="[421,662,1289,1422]" gridcol="1" gridrow="7" pageId="3" pageNumber="288">one row of 3–9 distinct, roughly equal-sized denticles</td>
<td id="768B5D8EFFBEDADB6B94B40F0AF78282" box="[698,910,1289,1422]" gridcol="2" gridrow="7" pageId="3" pageNumber="288">one row of 6–7 denticles decreasing in size proximally</td>
<td id="768B5D8EFFBEDADB6A9CB40F0DE68282" box="[946,1183,1289,1422]" gridcol="3" gridrow="7" pageId="3" pageNumber="288">side smooth or with one row of 5–7 small denticles (according to different sources)</td>
<td id="768B5D8EFFBEDADB6DE6B40F0CC28282" box="[1224,1467,1289,1422]" gridcol="4" gridrow="7" pageId="3" pageNumber="288">one row of 2–3 small denticles (may be invis- ible or absent)</td>
<td id="768B5D8EFFBEDADB6CF3B40F0FC48282" box="[1501,1725,1289,1422]" gridcol="5" gridrow="7" pageId="3" pageNumber="288">absent</td>
<td id="768B5D8EFFBEDADB6FF0B40F0E988282" box="[1758,2017,1289,1422]" gridcol="6" gridrow="7" pageId="3" pageNumber="288">two rows of 5–10 clawlike denticles decreasing in size proximally</td>
</tr>
<tr id="355A34F2FFBEDADB698BB4980E9882BB" box="[165,2017,1438,1463]" gridrow="8" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB4980E9882BB" box="[165,2017,1438,1463]" colspan="7" colspanRight="6" gridcol="0" gridrow="8" pageId="3" pageNumber="288">Hair chaetae:</th>
</tr>
<tr id="355A34F2FFBEDADB698BB4C00E988147" box="[165,2017,1478,1611]" gridrow="9" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB4C008F98147" box="[165,384,1478,1611]" gridcol="0" gridrow="9" pageId="3" pageNumber="288">Location</th>
<td id="768B5D8EFFBEDADB688BB4C00BEF8147" box="[421,662,1478,1611]" gridcol="1" gridrow="9" pageId="3" pageNumber="288">most dorsal bundles; ventrally only in first two chaetiferous seg- ments (II, III)</td>
<td id="768B5D8EFFBEDADB6B94B4C00AF78147" box="[698,910,1478,1611]" gridcol="2" gridrow="9" pageId="3" pageNumber="288">most dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6A9CB4C00DE68147" box="[946,1183,1478,1611]" gridcol="3" gridrow="9" pageId="3" pageNumber="288">most dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6DE6B4C00CC28147" box="[1224,1467,1478,1611]" gridcol="4" gridrow="9" pageId="3" pageNumber="288">most dorsal and ventral bundles</td>
<td id="768B5D8EFFBEDADB6CF3B4C00FC48147" box="[1501,1725,1478,1611]" gridcol="5" gridrow="9" pageId="3" pageNumber="288">most dorsal and ven- tral bundles</td>
<td id="768B5D8EFFBEDADB6FF0B4C00E988147" box="[1758,2017,1478,1611]" gridcol="6" gridrow="9" pageId="3" pageNumber="288">most dorsal and ventral bundles</td>
</tr>
<tr id="355A34F2FFBEDADB698BB75C0E98817F" box="[165,2017,1626,1651]" gridrow="10" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB75C08F9817F" box="[165,384,1626,1651]" gridcol="0" gridrow="10" pageId="3" pageNumber="288">Number per bundle</th>
<td id="768B5D8EFFBEDADB688BB75C0BEF817F" box="[421,662,1626,1651]" gridcol="1" gridrow="10" pageId="3" pageNumber="288">not more than 2</td>
<td id="768B5D8EFFBEDADB6B94B75C0AF7817F" box="[698,910,1626,1651]" gridcol="2" gridrow="10" pageId="3" pageNumber="288">up to 3–5</td>
<td id="768B5D8EFFBEDADB6A9CB75C0DE6817F" box="[946,1183,1626,1651]" gridcol="3" gridrow="10" pageId="3" pageNumber="288">up to 5–7</td>
<td id="768B5D8EFFBEDADB6DE6B75C0CC2817F" box="[1224,1467,1626,1651]" gridcol="4" gridrow="10" pageId="3" pageNumber="288">up to 3–4</td>
<td id="768B5D8EFFBEDADB6CF3B75C0FC4817F" box="[1501,1725,1626,1651]" gridcol="5" gridrow="10" pageId="3" pageNumber="288">up to 5–7</td>
<td id="768B5D8EFFBEDADB6FF0B75C0E98817F" box="[1758,2017,1626,1651]" gridcol="6" gridrow="10" pageId="3" pageNumber="288">up to 4–6</td>
</tr>
<tr id="355A34F2FFBEDADB698BB7840E988197" box="[165,2017,1666,1691]" gridrow="11" pageId="3" pageNumber="288">
<th id="768B5D8EFFBEDADB698BB78408F98197" box="[165,384,1666,1691]" gridcol="0" gridrow="11" pageId="3" pageNumber="288">Maximal length [µm]</th>
<td id="768B5D8EFFBEDADB688BB7840BEF8197" box="[421,662,1666,1691]" gridcol="1" gridrow="11" pageId="3" pageNumber="288">166</td>
<td id="768B5D8EFFBEDADB6B94B7840AF78197" box="[698,910,1666,1691]" gridcol="2" gridrow="11" pageId="3" pageNumber="288">85</td>
<td id="768B5D8EFFBEDADB6A9CB7840DE68197" box="[946,1183,1666,1691]" gridcol="3" gridrow="11" pageId="3" pageNumber="288">110</td>
<td id="768B5D8EFFBEDADB6DE6B7840CC28197" box="[1224,1467,1666,1691]" gridcol="4" gridrow="11" pageId="3" pageNumber="288">105</td>
<td id="768B5D8EFFBEDADB6CF3B7840FC48197" box="[1501,1725,1666,1691]" gridcol="5" gridrow="11" pageId="3" pageNumber="288">200</td>
<td id="768B5D8EFFBEDADB6FF0B7840E988197" box="[1758,2017,1666,1691]" gridcol="6" gridrow="11" pageId="3" pageNumber="288">100</td>
</tr>
</table>
</paragraph>
<subSubSection id="C370653BFFB9252069E9B0050C668041" pageId="4" pageNumber="289" type="discussion">
<paragraph id="8BD536B0FFB9252069E9B0050CFF8589" blockId="4.[151,1437,151,1869]" pageId="4" pageNumber="289">
<emphasis id="B91EEAA2FFB9252069E9B00508428611" bold="true" box="[199,315,259,285]" pageId="4" pageNumber="289">Remarks.</emphasis>
The main feature that distinguishes 
<taxonomicName id="4C6A4D33FFB925206BC7B0050D798610" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[745,1024,259,285]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206BC7B0050D798610" box="[745,1024,259,285]" italics="true" pageId="4" pageNumber="289">Aeolosoma vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206D25B0050D378611" bold="true" box="[1035,1102,259,285]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206D25B0050D378611" box="[1035,1102,259,285]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
from all of the 26 currently recognized congeners is the presence of peculiar sigmoid chaetae with a row of 3–9 relatively large, equally sized denticles on the concave side of the distal end and with a bifid tip bearing clearly differentiated distal and proximal apical teeth. Also, the new species stands out by a low number and a peculiar distribution of the hair chaetae in the bundles of the body: it has not more than two hairs per bundle, and on the ventral side hairs are absent in most segments, from IV to the end of the body. Five representatives of the genus have some resemblance with 
<taxonomicName id="4C6A4D33FFB9252069B9B0DD083E86F8" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[151,327,475,501]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB9252069B9B0DD083E86F8" box="[151,327,475,501]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB92520687EB0DD08EB86F9" bold="true" box="[336,402,475,501]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB92520687EB0DD08EB86F9" box="[336,402,475,501]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
The presence of denticles (serrations) on the distal concave part of the sigmoid chaetae is known in 
<taxonomicName id="4C6A4D33FFB92520682BB0F90B5D8515" authority="Marcus, 1944" authorityName="Marcus" authorityYear="1944" box="[261,548,511,537]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="corderoi">
<emphasis id="B91EEAA2FFB92520682BB0F908F88515" box="[261,385,511,537]" italics="true" pageId="4" pageNumber="289">A. corderoi</emphasis>
Marcus, 1944
</taxonomicName>
, 
<taxonomicName id="4C6A4D33FFB925206B00B0F90A328515" authority="Marcus, 1944" authorityName="Marcus" authorityYear="1944" box="[558,843,511,537]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="evelinae">
<emphasis id="B91EEAA2FFB925206B00B0F90BD08515" box="[558,681,511,537]" italics="true" pageId="4" pageNumber="289">A. evelinae</emphasis>
Marcus, 1944
</taxonomicName>
, 
<taxonomicName id="4C6A4D33FFB925206A7BB0F90D088515" authority="Marcus, 1944" authorityName="Marcus" authorityYear="1944" box="[853,1137,511,537]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206A7BB0F90AB68514" box="[853,975,511,537]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
Marcus, 1944
</taxonomicName>
, and 
<taxonomicName id="4C6A4D33FFB925206D84B0F90C1E8514" authorityName="Aiyer" authorityYear="1926" box="[1194,1383,511,537]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="travancorense">
<emphasis id="B91EEAA2FFB925206D84B0F90C1E8514" box="[1194,1383,511,537]" italics="true" pageId="4" pageNumber="289">A. travancorense</emphasis>
</taxonomicName>
, and bifurcated tips of the sigmoid chaetae are noted in 
<taxonomicName id="4C6A4D33FFB925206BE5B3250A3F8530" authorityName="Marcus" authorityYear="1944" box="[715,838,547,573]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206BE5B3250A3F8530" box="[715,838,547,573]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
and 
<taxonomicName id="4C6A4D33FFB925206A55B3250DA48531" authority="Vejdovsky, 1884" authorityName="Vejdovsky" authorityYear="1884" box="[891,1245,547,573]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="tenebrarum">
<emphasis id="B91EEAA2FFB925206A55B3250D648531" box="[891,1053,547,573]" italics="true" pageId="4" pageNumber="289">A. tenebrarum</emphasis>
Vejdovsky, 1884
</taxonomicName>
(Aiyer 1926; 
<bibRefCitation id="EFFB4B41FFB925206C54B32508A7856D" author="Du Bois-Reymond Marcus, E." pageId="4" pageNumber="289" pagination="1 - 8" refId="ref3871" refString="Du Bois-Reymond Marcus, E. (1944) Notes on Fresh-water Oligochaeta from Brazil. Comunicaciones zoologicas del Museo de Historia Natural de Montevideo, 1 (20), 1 - 8." type="journal article" year="1944">Du Bois-Reymond Marcus 1944</bibRefCitation>
; Marcus 1944; 
<bibRefCitation id="EFFB4B41FFB925206BA3B3410A61856D" author="Bunke, D." box="[653,792,583,609]" pageId="4" pageNumber="289" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206A0AB3410D12856D" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[804,1131,583,609]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson 1971</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206D59B3410D87856D" author="Naidu, K. V." box="[1143,1278,582,609]" pageId="4" pageNumber="289" refId="ref4183" refString="Naidu, K. V. (2005) The Fauna of India and the adjacent countries. Aquatic Oligochaeta. Zoological Survey of India, Kolkata, 294 pp." type="book" year="2005">Naidu 2005</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206C27B3410CE8856D" author="Timm, T." box="[1289,1425,583,609]" pageId="4" pageNumber="289" pagination="1 - 235" refId="ref4277" refString="Timm, T. (2009) A guide to the freshwater Oligochaeta and Polychaeta of Northern and Central Europe. Lauterbornia, 66, 1 - 235." type="journal article" year="2009">Timm 2009</bibRefCitation>
). Comparison and characteristics differentiating the listed species from 
<taxonomicName id="4C6A4D33FFB925206A88B36D0D2C8588" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[934,1109,619,645]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206A88B36D0D2C8588" box="[934,1109,619,645]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206D72B36D0DE28589" bold="true" box="[1116,1179,619,645]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206D72B36D0DE28589" box="[1116,1179,619,645]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
are given in 
<tableCitation id="C6E8030BFFB925206C02B36D0CFB8589" box="[1324,1410,619,645]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
.
</paragraph>
<paragraph id="8BD536B0FFB9252069E9B3890BC0831D" blockId="4.[151,1437,151,1869]" pageId="4" pageNumber="289">
Only 
<taxonomicName id="4C6A4D33FFB925206824B38908F385A4" authorityName="Marcus" authorityYear="1944" box="[266,394,655,681]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206824B38908F385A4" box="[266,394,655,681]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
has sigmoid chaetae with both denticles on the concave side and bifurcate ends, like 
<taxonomicName id="4C6A4D33FFB925206CAAB389085F85C0" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206CAAB389085F85C0" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206803B3B5081585C1" bold="true" box="[301,364,691,717]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206803B3B5081585C1" box="[301,364,691,717]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
(Marcus 1944; 
<bibRefCitation id="EFFB4B41FFB925206B35B3B50BDF85C1" author="Bunke, D." box="[539,678,691,717]" pageId="4" pageNumber="289" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206B9FB3B50A8C85C1" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[689,1013,691,717]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson 1971</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206D2EB3B50DFE85C1" author="Timm, T." box="[1024,1159,691,717]" pageId="4" pageNumber="289" pagination="1 - 235" refId="ref4277" refString="Timm, T. (2009) A guide to the freshwater Oligochaeta and Polychaeta of Northern and Central Europe. Lauterbornia, 66, 1 - 235." type="journal article" year="2009">Timm 2009</bibRefCitation>
). However, in contrast to the new species, the number of denticles on the concave side of the sigmoid chaetae in 
<taxonomicName id="4C6A4D33FFB925206D49B3D10D9A85FC" authorityName="Marcus" authorityYear="1944" box="[1127,1251,727,753]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206D49B3D10D9A85FC" box="[1127,1251,727,753]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
does not exceed 2–3 (when present at all), these denticles are very small and may be invisible or completely absent in specimens from some populations (
<bibRefCitation id="EFFB4B41FFB925206882B2190B808435" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[428,761,799,825]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson 1971</bibRefCitation>
). The apical teeth of the sigmoid chaetae of 
<taxonomicName id="4C6A4D33FFB925206DDBB2190C0B8434" authorityName="Marcus" authorityYear="1944" box="[1269,1394,799,825]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206DDBB2190C0B8434" box="[1269,1394,799,825]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
are located on the chaetae's tips next to each other and cannot be clearly identified as distal (upper) and proximal (lower) (Marcus 1944), unlike in 
<taxonomicName id="4C6A4D33FFB92520689EB2610B24848C" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[432,605,871,897]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB92520689EB2610B24848C" box="[432,605,871,897]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206B4DB2610BD8848D" bold="true" box="[611,673,871,897]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206B4DB2610BD8848D" box="[611,673,871,897]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
Besides, in specimens of 
<taxonomicName id="4C6A4D33FFB925206A90B2610D41848C" authorityName="Marcus" authorityYear="1944" box="[958,1080,871,897]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206A90B2610D41848C" box="[958,1080,871,897]" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
from some regions, the sigmoid chaetae may be not bifurcate [e.g., from 
<collectingCountry id="F37D7620FFB925206B5FB28D0BA984A9" box="[625,720,907,933]" name="Suriname" pageId="4" pageNumber="289">Surinam</collectingCountry>
according to 
<bibRefCitation id="EFFB4B41FFB925206A5FB28D0DAD84A9" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[881,1236,906,933]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson (1971)</bibRefCitation>
]. Additionally, 
<taxonomicName id="4C6A4D33FFB925206CAAB28D098A84C4" authorityName="Marcus" authorityYear="1944" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="sawayai">
<emphasis id="B91EEAA2FFB925206CAAB28D098A84C4" italics="true" pageId="4" pageNumber="289">A. sawayai</emphasis>
</taxonomicName>
differs from 
<taxonomicName id="4C6A4D33FFB9252068A8B2A90B4D84C4" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[390,564,943,969]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB9252068A8B2A90B4D84C4" box="[390,564,943,969]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206B15B2A90B0384C5" bold="true" box="[571,634,943,969]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206B15B2A90B0384C5" box="[571,634,943,969]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
in the starting position of the sigmoid chaetae (from III 
<emphasis id="B91EEAA2FFB925206DC0B2A90C7584C4" box="[1262,1292,943,968]" italics="true" pageId="4" pageNumber="289">vs.</emphasis>
from II), the presence of hair chaetae also in posterior ventral bundles, more numerous hair chaetae per bundle, and a shorter maximal length of the hair chaetae (see 
<tableCitation id="C6E8030BFFB925206B78B2F10BD2831D" box="[598,683,1015,1041]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
).
</paragraph>
<paragraph id="8BD536B0FFB9252069E9B51D0D1A8259" blockId="4.[151,1437,151,1869]" pageId="4" pageNumber="289">
<taxonomicName id="4C6A4D33FFB9252069E9B51D08128339" authorityName="Vejdovsky" authorityYear="1884" box="[199,363,1051,1077]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="tenebrarum">
<emphasis id="B91EEAA2FFB9252069E9B51D08128339" box="[199,363,1051,1077]" italics="true" pageId="4" pageNumber="289">A. tenebrarum</emphasis>
</taxonomicName>
, according to various sources, does or does not have a bifurcated apex on the sigmoid chaetae (
<bibRefCitation id="EFFB4B41FFB9252069B1B53908528355" author="Bunke, D." box="[159,299,1087,1113]" pageId="4" pageNumber="289" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206818B5390B008355" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[310,633,1087,1113]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson 1971</bibRefCitation>
; 
<bibRefCitation id="EFFB4B41FFB925206BADB5390A738355" author="Timm, T." box="[643,778,1087,1113]" pageId="4" pageNumber="289" pagination="1 - 235" refId="ref4277" refString="Timm, T. (2009) A guide to the freshwater Oligochaeta and Polychaeta of Northern and Central Europe. Lauterbornia, 66, 1 - 235." type="journal article" year="2009">Timm 2009</bibRefCitation>
). 
<bibRefCitation id="EFFB4B41FFB925206A32B5390D088355" author="Brinkhurst, R. O. &amp; Jamieson, B. G. M." box="[796,1137,1087,1113]" pageId="4" pageNumber="289" refId="ref3699" refString="Brinkhurst, R. O. &amp; Jamieson, B. G. M. (1971) Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, 860 pp." type="book" year="1971">Brinkhurst &amp; Jamieson (1971)</bibRefCitation>
, summarizing a large body of references, indicate that the species does not appear to have apical teeth but rather a row of one or more small teeth on the convex part of the distal end of the sigmoid chaetae, and that only the first tooth is clearly visible. Thus, there are some disagreements in the structure of the tips of the sigmoid chaetae in 
<taxonomicName id="4C6A4D33FFB925206D1FB5AD0DAA83C9" authorityName="Vejdovsky" authorityYear="1884" box="[1073,1235,1195,1221]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="tenebrarum">
<emphasis id="B91EEAA2FFB925206D1FB5AD0DAA83C9" box="[1073,1235,1195,1221]" italics="true" pageId="4" pageNumber="289">A. tenebrarum</emphasis>
</taxonomicName>
, in contrast to the distinct bifid 
<typeStatus id="54D18812FFB925206800B5C9082783E5" box="[302,350,1231,1257]" pageId="4" pageNumber="289">type</typeStatus>
of this chaetae in 
<taxonomicName id="4C6A4D33FFB925206B00B5C90BA483E4" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[558,733,1231,1257]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206B00B5C90BA483E4" box="[558,733,1231,1257]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206BCAB5C90A5D83E5" bold="true" box="[740,804,1231,1257]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206BCAB5C90A5D83E5" box="[740,804,1231,1257]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
Also, 
<taxonomicName id="4C6A4D33FFB925206A40B5C90D6983E5" authorityName="Vejdovsky" authorityYear="1884" box="[878,1040,1231,1257]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="tenebrarum">
<emphasis id="B91EEAA2FFB925206A40B5C90D6983E5" box="[878,1040,1231,1257]" italics="true" pageId="4" pageNumber="289">A. tenebrarum</emphasis>
</taxonomicName>
differs from 
<taxonomicName id="4C6A4D33FFB925206D88B5C90C2C83E4" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[1190,1365,1231,1257]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206D88B5C90C2C83E4" box="[1190,1365,1231,1257]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206C73B5C90CE483E5" bold="true" box="[1373,1437,1231,1257]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206C73B5C90CE483E5" box="[1373,1437,1231,1257]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
in a more posterior starting position of the sigmoid chaetae and their greater length, the absence of any denticles on the concave side of the sigmoid chaetae, the presence of hair chaetae in most ventral bundles, a larger number of hair chaetae per bundle, and a greater maximal length of the hair chaetae (see 
<tableCitation id="C6E8030BFFB925206D2EB43D0D2C8259" box="[1024,1109,1339,1365]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
).
</paragraph>
<paragraph id="8BD536B0FFB9252069E9B4590DF48105" blockId="4.[151,1437,151,1869]" pageId="4" pageNumber="289">
The remaining three species— 
<taxonomicName id="4C6A4D33FFB925206B31B4590BE48275" authorityName="Marcus" authorityYear="1944" box="[543,669,1375,1401]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="corderoi">
<emphasis id="B91EEAA2FFB925206B31B4590BE48275" box="[543,669,1375,1401]" italics="true" pageId="4" pageNumber="289">A. corderoi</emphasis>
</taxonomicName>
, 
<taxonomicName id="4C6A4D33FFB925206B82B4590A518275" authorityName="Marcus" authorityYear="1944" box="[684,808,1375,1401]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="evelinae">
<emphasis id="B91EEAA2FFB925206B82B4590A518275" box="[684,808,1375,1401]" italics="true" pageId="4" pageNumber="289">A. evelinae</emphasis>
</taxonomicName>
, and 
<taxonomicName id="4C6A4D33FFB925206A49B4590D5C8274" authorityName="Aiyer" authorityYear="1926" box="[871,1061,1375,1401]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="travancorense">
<emphasis id="B91EEAA2FFB925206A49B4590D5C8274" box="[871,1061,1375,1401]" italics="true" pageId="4" pageNumber="289">A. travancorense</emphasis>
</taxonomicName>
—all have serrated concave sides of the sigmoid chaetae, but simple-pointed tips of these chaetae, unlike bifid ones in 
<taxonomicName id="4C6A4D33FFB925206D45B4850C628290" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[1131,1307,1411,1437]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB925206D45B4850C628290" box="[1131,1307,1411,1437]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206C0BB4850C1F8291" bold="true" box="[1317,1382,1411,1437]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206C0BB4850C1F8291" box="[1317,1382,1411,1437]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
(see 
<tableCitation id="C6E8030BFFB9252069B9B4A1099582CD" box="[151,236,1447,1473]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
). It should be noted that in 
<taxonomicName id="4C6A4D33FFB925206B36B4A10BEA82CD" authorityName="Marcus" authorityYear="1944" box="[536,659,1447,1473]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="evelinae">
<emphasis id="B91EEAA2FFB925206B36B4A10BEA82CD" box="[536,659,1447,1473]" italics="true" pageId="4" pageNumber="289">A. evelinae</emphasis>
</taxonomicName>
, denticles on the concave side of the sigmoid chaetae were noted only in individuals found in 
<collectingCountry id="F37D7620FFB9252068B4B4CD0B7B82E9" box="[410,514,1483,1509]" name="Germany" pageId="4" pageNumber="289">Germany</collectingCountry>
(
<bibRefCitation id="EFFB4B41FFB925206B3EB4CD0BE482EA" author="Bunke, D." box="[528,669,1483,1510]" pageId="4" pageNumber="289" pagination="187 - 368" refId="ref3732" refString="Bunke, D. (1967) Zur Morphologie und Systematik der Aeolosomatidae Beddard 1895 und Potamodrilidae nov. fam. (Oligochaeta). Zoologische Jahrbucher. Abteilung fur Anatomie und Ontogenie der Tiere, 94, 187 - 368." type="journal article" year="1967">Bunke 1967</bibRefCitation>
), while they were not recorded in the original description from South America (Marcus 1944). Thus, the individuals from 
<collectingCountry id="F37D7620FFB925206BCCB4E90A338105" box="[738,842,1519,1545]" name="Germany" pageId="4" pageNumber="289">Germany</collectingCountry>
were possible misidentified.
</paragraph>
<paragraph id="8BD536B0FFB9252069E9B7150C668041" blockId="4.[151,1437,151,1869]" pageId="4" pageNumber="289">
In addition to the shape of the apex of the sigmoid chaetae, all three species mentioned above also differ from 
<taxonomicName id="4C6A4D33FFB9252069B9B731083F815C" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[151,326,1591,1617]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB9252069B9B731083F815C" box="[151,326,1591,1617]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206863B73108F4815D" bold="true" box="[333,397,1591,1617]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206863B73108F4815D" box="[333,397,1591,1617]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
in more numerous and shorter hair chaetae in the bundles, and the presence of hairs in most segments on the ventral side of the body (see 
<tableCitation id="C6E8030BFFB925206BB4B75D0B898179" box="[666,752,1627,1653]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
). 
<taxonomicName id="4C6A4D33FFB925206A2AB75D0AFB8179" authorityName="Marcus" authorityYear="1944" box="[772,898,1627,1653]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="corderoi">
<emphasis id="B91EEAA2FFB925206A2AB75D0AFB8179" box="[772,898,1627,1653]" italics="true" pageId="4" pageNumber="289">A. corderoi</emphasis>
</taxonomicName>
additionally differs from the new species in the starting position of the sigmoid chaetae and their greater length, and in a noticeable decrease of the denticles size on the concave side of the sigmoid chaetae towards their proximal end. In turn, 
<taxonomicName id="4C6A4D33FFB925206D15B7A50DC381B1" authorityName="Marcus" authorityYear="1944" box="[1083,1210,1699,1725]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="evelinae">
<emphasis id="B91EEAA2FFB925206D15B7A50DC381B1" box="[1083,1210,1699,1725]" italics="true" pageId="4" pageNumber="289">A. evelinae</emphasis>
</taxonomicName>
additionally differs from 
<taxonomicName id="4C6A4D33FFB9252069FBB7C108FD81EC" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[213,388,1735,1761]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB9252069FBB7C108FD81EC" box="[213,388,1735,1761]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB9252068A2B7C108B581ED" bold="true" box="[396,460,1735,1761]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB9252068A2B7C108B581ED" box="[396,460,1735,1761]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
in the presence of sigmoid chaetae exclusively in ventral bundles of the body. Finally, 
<taxonomicName id="4C6A4D33FFB9252069B9B7ED082C8008" authorityName="Aiyer" authorityYear="1926" box="[151,341,1771,1797]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="travancorense">
<emphasis id="B91EEAA2FFB9252069B9B7ED082C8008" box="[151,341,1771,1797]" italics="true" pageId="4" pageNumber="289">A. travancorense</emphasis>
</taxonomicName>
differs from 
<taxonomicName id="4C6A4D33FFB9252068C6B7ED0BEC8008" authority="Gusakov &amp; Dien &amp; Thanh, 2021" authorityName="Gusakov &amp; Dien &amp; Thanh" authorityYear="2021" box="[488,661,1771,1797]" class="Polychaeta" family="Aeolosomatidae" genus="Aeolosoma" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="4" pageNumber="289" phylum="Annelida" rank="species" species="vietnamicum" status="sp. nov.">
<emphasis id="B91EEAA2FFB9252068C6B7ED0BEC8008" box="[488,661,1771,1797]" italics="true" pageId="4" pageNumber="289">A. vietnamicum</emphasis>
</taxonomicName>
<emphasis id="B91EEAA2FFB925206BB2B7ED0BA28009" bold="true" box="[668,731,1771,1797]" pageId="4" pageNumber="289">
<taxonomicNameLabel id="A22D57D9FFB925206BB2B7ED0BA28009" box="[668,731,1771,1797]" pageId="4" pageNumber="289" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
also in the initial position of the sigmoid chaetae and in unique peculiarities of their distal part, namely two rows of claw-like denticles, noticeably reducing in size proximally, on the concave side of these chaetae, and an elongated, pointed, bristle-like tooth on their tip (see 
<tableCitation id="C6E8030BFFB925206D92B6350C6B8041" box="[1212,1298,1843,1869]" captionStart="TABLE 2" captionStartId="3.[151,239,499,525]" captionTargetBox="[165,2017,576,1691]" captionTargetPageId="3" captionText="TABLE 2. Comparison of Aeolosoma vietnamicum sp. n. with morphologically similar congeners (only differentiating characteristics are presented; main differences of the compared species are underlined)." httpUri="http://table.plazi.org/id/DF156638FFBE252769B9B0F508AF853D" pageId="4" pageNumber="289" tableUuid="DF156638FFBE252769B9B0F508AF853D">Table 2</tableCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>