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<mods:title id="99F1FDB8626E59D773B01BCCCBAABFF0">Key to sessile gnesiotrochan rotifers: Families, monospecific species in Flosculariidae, species of Atrochidae, Conochilidae, and Limnias</mods:title>
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Dichotomous key to species in family
<taxonomicName id="68BB48EF4164FFA6FD81D1F3FC9FB0AA" ID-CoL="8HR" ID-ENA="360646" authority="Harring, 1913" authorityName="Harring" authorityYear="1913" box="[619,784,935,961]" class="Eurotatoria" family="Conochilidae" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="family">Conochilidae</taxonomicName>
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1 Corona circular (not horseshoe-shaped) with prominent ventral gap absent; ventral (= lateral) antennae not within the corona; resting eggs with spiral furrow, but no hatching furrow evident; body length ~500 µm; monospecific genus................................................................
<taxonomicName id="68BB48EF4164FFA6FCD0D673FA13B756" authority="(Vidrine, McLaughlin, &amp; Willis, 1985)" baseAuthorityName="Vidrine, McLaughlin, &amp; Willis" baseAuthorityYear="1985" box="[826,1436,1063,1085]" class="Eurotatoria" family="Conochilidae" genus="Conochilopsis" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="causeyae">
<emphasis id="9DCFEF7E4164FFA6FCD0D673FBADB756" box="[826,1058,1063,1085]" italics="true" pageId="10" pageNumber="507">Conochilopsis causeyae</emphasis>
(Vidrine, McLaughlin, &amp; Willis, 1985)
</taxonomicName>
[
<bibRefCitation id="CB2A4E9D4164FFA6FF0DD611FE64B731" author="Segers, H. &amp; Wallace, R. L." box="[231,491,1092,1114]" pageId="10" pageNumber="507" pagination="37 - 48" refId="ref16864" refString="Segers, H. &amp; Wallace, R. L. (2001) Phylogeny and classification of the Conochilidae (Rotifera, Monogononta, Flosculariacea). Zoologica Scripta, 30, 37 - 48. https: // doi. org / 10.1046 / j. 1463 - 6409.2001.00048. x" type="journal article" year="2001">Segers and Wallace (2001)</bibRefCitation>
described its trophi and reallocated it to a new genus in
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.]
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<paragraph id="AF04336C4164FFA6FF7DD636FA13B71C" blockId="10.[151,1437,1004,1906]" box="[151,1436,1122,1144]" pageId="10" pageNumber="507">1 Corona horseshoe-shaped with a prominent ventral gap....................................................... 2</paragraph>
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2(1) Ventral (= lateral) antennae within corona; colonies of several to many individuals; resting eggs not ornamented, but possess a hatching furrow; genus
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<emphasis id="9DCFEF7E4164FFA6FE2CD6C8FDBCB7DA" box="[454,563,1180,1201]" italics="true" pageId="10" pageNumber="507">Conochilus</emphasis>
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(
<figureCitation id="37802FE94164FFA6FDABD6C8FDF5B7D9" box="[577,634,1180,1202]" captionStart="FIGURE 5" captionStartId="9.[151,250,1454,1478]" captionTargetBox="[151,1436,181,1430]" captionTargetId="figure-17@9.[151,1436,181,1430]" captionTargetPageId="9" captionText="FIGURE 5. Species of Conochilidae. A. Conochilus hippocrepis (Schrank, 1803); B. Conochilus unicornis Rousselet, 1892; C. Conochilus coenobasis (Skorikov, 1914); D. Conochilus exiguus (Ahlstrom, 1938). This amphoteric female is evidenced by presence of a subitaneous embryo and a smaller male embryo. (The cone-lip is evident in C and D.) The foot in the variation of C. unicornis (C. norvegicus) is much longer (~4x) (see below). E. Examples of reported variation in the fusion of antennae in the Conochilus: consult Edmondson (1959) and Pejler (1956). Bars: 500 µm (A,B); 100 µm (C,D). (E. Redrawn from original art provided by W.T. Edmondson.)" figureDoi="http://doi.org/10.5281/zenodo.10469063" httpUri="https://zenodo.org/record/10469063/files/figure.png" pageId="10" pageNumber="507">Fig. 5</figureCitation>
)................................................................. 3 [Trophi for the two species in genus
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<emphasis id="9DCFEF7E4164FFA6FDA8D6EEFD20B7A4" box="[578,687,1210,1231]" italics="true" pageId="10" pageNumber="507">Conochilus</emphasis>
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were (SEM) are found in
<bibRefCitation id="CB2A4E9D4164FFA6FC41D6EEFB2FB7A4" author="Segers, H. &amp; Wallace, R. L." box="[939,1184,1210,1232]" pageId="10" pageNumber="507" pagination="37 - 48" refId="ref16864" refString="Segers, H. &amp; Wallace, R. L. (2001) Phylogeny and classification of the Conochilidae (Rotifera, Monogononta, Flosculariacea). Zoologica Scripta, 30, 37 - 48. https: // doi. org / 10.1046 / j. 1463 - 6409.2001.00048. x" type="journal article" year="2001">Segers &amp; Wallace (2001)</bibRefCitation>
.]
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2 Ventral (= lateral) antennae not within corona; resting egg with spiral surface texture, but no hatching furrow evident; genus (
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<taxonomicName id="68BB48EF4164FFA6FF00D6A0FEF9B662" authorityName="Hlava" authorityYear="1904" box="[234,374,1268,1289]" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="genus">Conochiloides</taxonomicName>
)
<taxonomicName id="68BB48EF4164FFA6FE69D6A0FE7FB662" box="[387,496,1268,1289]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="genus">Conochilus</taxonomicName>
</emphasis>
............................................................................. 4 [Trophi for the four species in the former genus
<taxonomicName id="68BB48EF4164FFA6FD2BD746FCC3B64C" authorityName="Hlava" authorityYear="1904" box="[705,844,1298,1319]" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="genus">
<emphasis id="9DCFEF7E4164FFA6FD2BD746FCC3B64C" box="[705,844,1298,1319]" italics="true" pageId="10" pageNumber="507">Conochiloides</emphasis>
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were drawn by
<bibRefCitation id="CB2A4E9D4164FFA6FC06D746FB1EB64C" author="Ahlstrom, E. H." box="[1004,1169,1298,1320]" pageId="10" pageNumber="507" pagination="88 - 110" refId="ref11622" refString="Ahlstrom, E. H. (1938) Plankton Rotatoria from North Carolina. Journal of the Elisha Mitchell Scientific Society, 54, 88 - 110." type="journal article" year="1938">Ahlstrom (1938)</bibRefCitation>
; SEMs of the trophi for
<taxonomicName id="68BB48EF4164FFA6FA6CD746FEC5B62F" baseAuthorityName="Hudson" baseAuthorityYear="1885" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="dossuarius">
<emphasis id="9DCFEF7E4164FFA6FA6CD746FEC5B62F" italics="true" pageId="10" pageNumber="507">C. dossuarius</emphasis>
</taxonomicName>
and
<taxonomicName id="68BB48EF4164FFA6FE93D77BFE5AB62E" baseAuthorityName="Seligo" baseAuthorityYear="1900" box="[377,469,1327,1349]" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="natans">
<emphasis id="9DCFEF7E4164FFA6FE93D77BFE5AB62E" box="[377,469,1327,1349]" italics="true" pageId="10" pageNumber="507">C. natans</emphasis>
</taxonomicName>
are shown in
<bibRefCitation id="CB2A4E9D4164FFA6FDB1D77BFCEFB62F" author="Segers, H. &amp; Wallace, R. L." box="[603,864,1327,1349]" pageId="10" pageNumber="507" pagination="37 - 48" refId="ref16864" refString="Segers, H. &amp; Wallace, R. L. (2001) Phylogeny and classification of the Conochilidae (Rotifera, Monogononta, Flosculariacea). Zoologica Scripta, 30, 37 - 48. https: // doi. org / 10.1046 / j. 1463 - 6409.2001.00048. x" type="journal article" year="2001">Segers and Wallace (2001)</bibRefCitation>
.]
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD719FA13B614" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
3(2) Antennae not fused; colonies of 30100 individuals; total body length 400850 um (foot:body ratio, 2.22.4)..........................................................................................
<taxonomicName id="68BB48EF4164FFA6FB61D73EFA13B614" authority="(Schrank, 1803)" baseAuthorityName="Schrank" baseAuthorityYear="1803" box="[1163,1436,1386,1408]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="hippocrepis">
<emphasis id="9DCFEF7E4164FFA6FB61D73EFB74B614" box="[1163,1275,1386,1407]" italics="true" pageId="10" pageNumber="507">hippocrepis</emphasis>
(Schrank, 1803)
</taxonomicName>
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD7D3FCE2B526" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
3 Antennae fused (except perhaps at distal end) into a single structure; small colonies (530 individuals) with total body length 200450 um and foot:body ratio, 1.21.7 or larger colonies (50400 or more individuals) with total body length &lt;1300 µm (foot:body ratio 2.22.7)............................................................
<taxonomicName id="68BB48EF4164FFA6FB48D796FA13B6BC" authority="Rousselet, 1892" authorityName="Rousselet" authorityYear="1892" box="[1186,1436,1474,1496]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="unicornis">
<emphasis id="9DCFEF7E4164FFA6FB48D796FB72B6BC" box="[1186,1277,1474,1495]" italics="true" pageId="10" pageNumber="507">unicornis</emphasis>
Rousselet, 1892
</taxonomicName>
[Includes a form previously known as
<taxonomicName id="68BB48EF4164FFA6FDA6D78BFC5DB69F" authority="Burckhardt, 1943" authorityName="Burckhardt" authorityYear="1943" box="[588,978,1503,1525]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="norvegicus">
<emphasis id="9DCFEF7E4164FFA6FDA6D78BFCA8B69E" box="[588,807,1503,1525]" italics="true" pageId="10" pageNumber="507">Conochilus norvegicus</emphasis>
Burckhardt, 1943
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that produces colonies often with large numbers of individuals possessing elongate bodies that may be the result of allometric growth (
<bibRefCitation id="CB2A4E9D4164FFA6FBAED7A8FB7BB579" author="Edmondson, W. T." box="[1092,1268,1532,1554]" pageId="10" pageNumber="507" pagination="420 - 494" refId="ref13350" refString="Edmondson, W. T. (1959) Rotifera. In: Edmondson, W. T. (Ed.), Freshwater Biology. 2 nd Ediiton. John Wiley &amp; Sons, Inc., New York, New York, pp. 420 - 494." type="book chapter" year="1959">Edmondson 1959</bibRefCitation>
;
<bibRefCitation id="CB2A4E9D4164FFA6FAEBD7A8FE99B544" author="Ruttner-Kolisko, A." pageId="10" pageNumber="507" pagination="1 - 146" refId="ref16485" refString="Ruttner-Kolisko, A. (1974) Planktonic rotifers: biology and taxonomy. Die Binnengewasser Supplement, 26, 1 - 146." type="journal article" year="1974">Ruttner-Kolisko 1974</bibRefCitation>
).
<bibRefCitation id="CB2A4E9D4164FFA6FEC2D44EFE45B55B" author="De Graaf, F." box="[296,458,1562,1584]" pageId="10" pageNumber="507" pagination="390 - 399" refId="ref12812" refString="De Graaf, F. (1953) Commensal organisms in the colonies of Conochilus unicornis Rousselet with a note on Phoridum mucicola Huber et Naumann. Hydrobiologia, 5, 390 - 399. https: // doi. org / 10.1007 / BF 00018668" type="journal article" year="1953">De Graaf (1953)</bibRefCitation>
provided information on the commensal protists that inhabit the gelatinous matrix and
<bibRefCitation id="CB2A4E9D4164FFA6FADAD44EFEADB527" author="Yang, H. &amp; Hochberg, R. &amp; Walsh, E. J. &amp; Wallace, R. L." pageId="10" pageNumber="507" pagination="12318" refId="ref18641" refString="Yang, H., Hochberg, R., Walsh, E. J. &amp; Wallace, R. L. (2021) Ultrastructure of the extracorporeal secretions of four sessile species of Rotifera (Gnesiotrocha) with observations on the chemistry of the gelatinous tube. Invertebrate Biology, 140, e 12318. https: // doi. org / 10.1111 / ivb. 12318" type="journal article" year="2021">
Yang
<emphasis id="9DCFEF7E4164FFA6FA80D44EFA18B544" box="[1386,1431,1562,1583]" italics="true" pageId="10" pageNumber="507">et al</emphasis>
. (2021)
</bibRefCitation>
provided information on the ultrastructure of the secretions.]
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD401FA13B5EC" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
4(2) Antennae not fused; rami symmetrical, with 56 large clavate teeth on each uncus; total body length 280510 µm............................................................................................
<taxonomicName id="68BB48EF4164FFA6FB27D426FA13B5EC" authority="(Seligo, 1900)" baseAuthorityName="Seligo" baseAuthorityYear="1900" box="[1229,1436,1650,1672]" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="natans">
<emphasis id="9DCFEF7E4164FFA6FB27D426FA82B5EC" box="[1229,1293,1650,1671]" italics="true" pageId="10" pageNumber="507">natans</emphasis>
(Seligo, 1900)
</taxonomicName>
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD4DBFA13B5CE" blockId="10.[151,1437,1004,1906]" box="[151,1436,1679,1701]" pageId="10" pageNumber="507">4 Antennae at least partially fused; rami symmetrical or not; variable number of large clavate teeth on each uncus.......... 5</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD4F8FA13B58B" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
5(4) Rami strikingly asymmetrical, one side almost triangular in shape, the other sub-rectangular; 5 clavate teeth on each uncus; total body length 280500 µm..........................................................
<taxonomicName id="68BB48EF4164FFA6FB72D49EFA13B58B" authority="(Hudson, 1885)" baseAuthorityName="Hudson" baseAuthorityYear="1885" box="[1176,1436,1738,1760]" class="Eurotatoria" family="Conochilidae" genus="Conochiloides" higherTaxonomySource="GBIF" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="dossuarius">
<emphasis id="9DCFEF7E4164FFA6FB72D49EFA8FB5B4" box="[1176,1280,1738,1759]" italics="true" pageId="10" pageNumber="507">dossuarius</emphasis>
(Hudson, 1885)
</taxonomicName>
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD4B3FA13B596" blockId="10.[151,1437,1004,1906]" box="[151,1436,1767,1789]" pageId="10" pageNumber="507">5 Rami symmetrical or at least asymmetry scant.............................................................. 6</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD550FC15B45C" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
6(5) Unci with 3/3 teeth; total body length 200250 µm.....................................
<taxonomicName id="68BB48EF4164FFA6FB63D550FA13B471" authority="(Skorikov, 1914)" baseAuthorityName="Skorikov" baseAuthorityYear="1914" box="[1161,1436,1796,1818]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="coenobasis">
<emphasis id="9DCFEF7E4164FFA6FB63D550FB7BB472" box="[1161,1268,1796,1817]" italics="true" pageId="10" pageNumber="507">coenobasis</emphasis>
(Skorikov, 1914)
</taxonomicName>
[Amphoteric females are known in this species (
<bibRefCitation id="CB2A4E9D4164FFA6FD5BD576FC06B45C" author="Ruttner-Kolisko, A." box="[689,905,1826,1848]" pageId="10" pageNumber="507" pagination="1 - 146" refId="ref16485" refString="Ruttner-Kolisko, A. (1974) Planktonic rotifers: biology and taxonomy. Die Binnengewasser Supplement, 26, 1 - 146." type="journal article" year="1974">Ruttner-Kolisko 1974</bibRefCitation>
).]
</paragraph>
<paragraph id="AF04336C4164FFA6FF7DD56BFD1DB419" blockId="10.[151,1437,1004,1906]" pageId="10" pageNumber="507">
6 Unci with 4/5 teeth; total body length 170190 µm........................................
<taxonomicName id="68BB48EF4164FFA6FB4CD514FA13B43F" authority="(Ahlstrom, 1938)" baseAuthorityName="Ahlstrom" baseAuthorityYear="1938" box="[1190,1436,1855,1877]" class="Eurotatoria" family="Conochilidae" genus="Conochilus" kingdom="Animalia" order="Flosculariaceae" pageId="10" pageNumber="507" phylum="Rotifera" rank="species" species="exiguus">
<emphasis id="9DCFEF7E4164FFA6FB4CD514FB60B43E" box="[1190,1263,1856,1877]" italics="true" pageId="10" pageNumber="507">exiguus</emphasis>
(
<bibRefCitation id="CB2A4E9D4164FFA6FB16D56BFA1AB43F" author="Ahlstrom, E. H." box="[1276,1429,1855,1877]" pageId="10" pageNumber="507" pagination="88 - 110" refId="ref11622" refString="Ahlstrom, E. H. (1938) Plankton Rotatoria from North Carolina. Journal of the Elisha Mitchell Scientific Society, 54, 88 - 110." type="journal article" year="1938">Ahlstrom, 1938</bibRefCitation>
)
</taxonomicName>
[An amphoteric female is shown in
<figureCitation id="37802FE94164FFA6FDD0D508FD08B419" box="[570,647,1884,1906]" captionStart="FIGURE 5" captionStartId="9.[151,250,1454,1478]" captionTargetBox="[151,1436,181,1430]" captionTargetId="figure-17@9.[151,1436,181,1430]" captionTargetPageId="9" captionText="FIGURE 5. Species of Conochilidae. A. Conochilus hippocrepis (Schrank, 1803); B. Conochilus unicornis Rousselet, 1892; C. Conochilus coenobasis (Skorikov, 1914); D. Conochilus exiguus (Ahlstrom, 1938). This amphoteric female is evidenced by presence of a subitaneous embryo and a smaller male embryo. (The cone-lip is evident in C and D.) The foot in the variation of C. unicornis (C. norvegicus) is much longer (~4x) (see below). E. Examples of reported variation in the fusion of antennae in the Conochilus: consult Edmondson (1959) and Pejler (1956). Bars: 500 µm (A,B); 100 µm (C,D). (E. Redrawn from original art provided by W.T. Edmondson.)" figureDoi="http://doi.org/10.5281/zenodo.10469063" httpUri="https://zenodo.org/record/10469063/files/figure.png" pageId="10" pageNumber="507">Fig. 5D</figureCitation>
.]
</paragraph>
</subSubSection>
</treatment>
</document>