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<document id="6EC26B744CD49E0B379F9C76E3CECD3E" ID-CLB-Dataset="32760" ID-DOI="10.11646/zootaxa.4286.1.4" ID-GBIF-Dataset="47a8d367-e49b-48ef-96bd-3e64c208046a" ID-ISSN="1175-5326" ID-Zenodo-Dep="828332" ID-ZooBank="5DB7C509-5FC6-4285-9350-B52014158DD7" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1500108595704" checkinUser="plazi" docAuthor="Klishko, Olga, Lopes-Lima, Manuel, Froufe, Elsa, Bogan, Arthur, Vasiliev, Lyudmila &amp; Yanovich, Lyudmila" docDate="2017" docId="03B7F447FFCE6D0DFF4AFF48FCF4EAE5" docLanguage="en" docName="zootaxa.4286.1.4.pdf" docOrigin="Zootaxa 4286 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Unio crassus Philipsson in Retzius 1788" docType="treatment" docVersion="7" lastPageNumber="109" masterDocId="FF8E8C3FFFDE6D1DFFDDFFDFFF8FE947" masterDocTitle="Taxonomic reassessment of the freshwater mussel genus Unio (Bivalvia: Unionidae) in Russia and Ukraine based on morphological and molecular data" masterLastPageNumber="112" masterPageNumber="93" pageNumber="109" updateTime="1698465109420" updateUser="ExternalLinkService">
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<mods:title id="E3B7090681C8FE2E643DDD83DDAAAF3A">Taxonomic reassessment of the freshwater mussel genus Unio (Bivalvia: Unionidae) in Russia and Ukraine based on morphological and molecular data</mods:title>
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<mods:namePart id="2C4A81442C3F06D285BDE649092649A5">Klishko, Olga</mods:namePart>
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<mods:namePart id="3BB9FAFDFA4AB137587DF669D0C2116D">Lopes-Lima, Manuel</mods:namePart>
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<mods:namePart id="64F93EDFEA59999905E05D873A9E6410">Froufe, Elsa</mods:namePart>
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<mods:namePart id="37B888515FABF6D7EDBB9FA501EF98CE">Yanovich, Lyudmila</mods:namePart>
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<treatment id="03B7F447FFCE6D0DFF4AFF48FCF4EAE5" ID-DOI="http://doi.org/10.5281/zenodo.6038425" ID-GBIF-Taxon="132548667" ID-Zenodo-Dep="6038425" LSID="urn:lsid:plazi:treatment:03B7F447FFCE6D0DFF4AFF48FCF4EAE5" httpUri="http://treatment.plazi.org/id/03B7F447FFCE6D0DFF4AFF48FCF4EAE5" lastPageNumber="109" pageId="16" pageNumber="109">
<subSubSection id="C30416DAFFCE6D0DFF4AFF48FE4BE9A8" pageId="16" pageNumber="109" type="nomenclature">
<paragraph id="8BA14551FFCE6D0DFF4AFF48FD05E9F5" blockId="16.[151,650,151,178]" box="[151,650,151,178]" pageId="16" pageNumber="109">
<heading id="D0E9F23DFFCE6D0DFF4AFF48FD05E9F5" bold="true" box="[151,650,151,178]" fontSize="11" level="1" pageId="16" pageNumber="109" reason="1">
<taxonomicName id="4C1E3ED2FFCE6D0DFF4AFF48FD05E9F5" authority="Philipsson in Retzius, 1788" authorityName="Philipsson in Retzius" authorityYear="1788" box="[151,650,151,178]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="crassus">
<emphasis id="B96A9943FFCE6D0DFF4AFF48FD05E9F5" bold="true" box="[151,650,151,178]" pageId="16" pageNumber="109">
<emphasis id="B96A9943FFCE6D0DFF4AFF48FEBBE9F6" bold="true" box="[151,308,151,177]" italics="true" pageId="16" pageNumber="109">Unio crassus</emphasis>
Philipsson in
<bibRefCitation id="EF8F38A0FFCE6D0DFE3EFF47FD05E9F5" author="Retzius" box="[483,650,152,178]" pageId="16" pageNumber="109" refString="Retzius, A. J. (1788) Dissertatio historico-naturalis sistens nova testaceorum genera. Quam venia ampliss. Facult. Philosophicae Praeside D. M. Andr. J. Retzio [= A. J. Retzius], ad publicum examen defert laurentius Munter Philipsson Scanus. Ad diem X. Decembris 1788. Typis Berlingianis, Lundae, 23 pp." type="book" year="1788">Retzius, 1788</bibRefCitation>
</emphasis>
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</heading>
</paragraph>
<paragraph id="8BA14551FFCE6D0DFF4AFF06FE4BE9A8" blockId="16.[151,598,217,362]" box="[151,452,217,239]" pageId="16" pageNumber="109">
<emphasis id="B96A9943FFCE6D0DFF4AFF06FE89E9A8" bold="true" box="[151,262,217,239]" pageId="16" pageNumber="109">Synonyms</emphasis>
(in the study area)
</paragraph>
</subSubSection>
<subSubSection id="C30416DAFFCE6D0DFF4AFF26FE6FE82D" pageId="16" pageNumber="109" type="reference_group">
<paragraph id="8BA14551FFCE6D0DFF4AFF26FE48E849" blockId="16.[151,598,217,362]" box="[151,455,248,270]" pageId="16" pageNumber="109">
<taxonomicName id="4C1E3ED2FFCE6D0DFF4AFF26FE4CE849" authority="Spengler, 1793" authorityName="Spengler" authorityYear="1793" box="[151,451,248,270]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="musivus">
<emphasis id="B96A9943FFCE6D0DFF4AFF26FEADE849" box="[151,290,249,270]" italics="true" pageId="16" pageNumber="109">Unio musivus</emphasis>
<bibRefCitation id="EF8F38A0FFCE6D0DFEF5FF27FE4CE849" author="Spengler" box="[296,451,248,270]" pageId="16" pageNumber="109" refString="Spengler, L. (1793) Beskrivekse over et nyt Slaegt af de toskallede Konkylier forhen af migkaldet Chaena, saa der Linneiske Slaegt Mya, hvilket noire bestemmes, og inddeles i tvende Slaegter. Skrivter af Naturhistorie-Selskabet, KiObenhavn, 3 (1), 16 - 69, pl. 2." type="journal article" year="1793">Spengler, 1793</bibRefCitation>
</taxonomicName>
.
</paragraph>
<paragraph id="8BA14551FFCE6D0DFF4AFEC7FE26E86B" blockId="16.[151,598,217,362]" box="[151,425,278,301]" pageId="16" pageNumber="109">
<taxonomicName id="4C1E3ED2FFCE6D0DFF4AFEC7FE2BE86B" authority="Lamarck, 1819" authorityName="Lamarck" authorityYear="1819" box="[151,420,278,301]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="nana">
<emphasis id="B96A9943FFCE6D0DFF4AFEC7FE8CE86A" box="[151,259,280,301]" italics="true" pageId="16" pageNumber="109">Unio nana</emphasis>
<bibRefCitation id="EF8F38A0FFCE6D0DFED4FEC9FE2BE86B" author="Lamarck" box="[265,420,278,300]" pageId="16" pageNumber="109" refString="Lamarck, J. - B. M. (1819) Histoire Naturelle des Animaux Sans Vertebres. Vol. 6. Imprimerie de A. Belin, Paris, 343 pp." type="book" year="1819">Lamarck, 1819</bibRefCitation>
</taxonomicName>
.
</paragraph>
<paragraph id="8BA14551FFCE6D0DFF4AFEE9FE6FE82D" blockId="16.[151,598,217,362]" pageId="16" pageNumber="109">
<taxonomicName id="4C1E3ED2FFCE6D0DFF4AFEE9FDDCE80C" authority="Ziegler in Rossmassler, 1835" authorityName="Ziegler in Rossmassler" authorityYear="1835" box="[151,595,309,331]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="fusculus">
<emphasis id="B96A9943FFCE6D0DFF4AFEE9FEACE80C" box="[151,291,309,331]" italics="true" pageId="16" pageNumber="109">Unio fusculus</emphasis>
Ziegler in
<bibRefCitation id="EF8F38A0FFCE6D0DFE4EFEEAFDDCE80C" author="Rossmassler" box="[403,595,309,331]" pageId="16" pageNumber="109" refString="Rossmassler, E. (1835) Iconographie der Land- und Susswasser-Mollusken, mit vorzuglicher Berucksichtigung der europaischen noch nicht abgebildeten Arten. 1 (1 &amp; 1). Arnoldische Buchhandlung, Dresden und Leipzig, 132 &amp; 26 pp." type="book" year="1835">Rossmässler, 1835</bibRefCitation>
</taxonomicName>
.
<taxonomicName id="4C1E3ED2FFCE6D0DFF4AFE8AFE53E82D" authority="Lindholm, 1904" authorityName="Lindholm" authorityYear="1904" box="[151,476,340,362]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="irgizlaica">
<emphasis id="B96A9943FFCE6D0DFF4AFE8AFEBFE82D" box="[151,304,340,362]" italics="true" pageId="16" pageNumber="109">Unio irgizlaica</emphasis>
<bibRefCitation id="EF8F38A0FFCE6D0DFEEBFE8BFE53E82D" author="Lindholm" box="[310,476,340,362]" pageId="16" pageNumber="109" refString="Lindholm, W. (1904) Zur Molluskenfauna der Governements Kursk und Orenburg. Annual Report of Zoological Museum of Imperial Academy of Sciences, 8, 338 - 344." type="journal article" year="1904">Lindholm, 1904</bibRefCitation>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="C30416DAFFCE6D0DFF4AFE4EFA83EA1E" pageId="16" pageNumber="109" type="description">
<paragraph id="8BA14551FFCE6D0DFF4AFE4EFEE1EB8D" blockId="16.[151,1437,401,930]" pageId="16" pageNumber="109">
<emphasis id="B96A9943FFCE6D0DFF4AFE4EFEA6E8ED" bold="true" box="[151,297,401,426]" pageId="16" pageNumber="109">Description.</emphasis>
Shell is oval, thick (up to
<quantity id="4CE6E8B4FFCE6D0DFD90FE4EFD2CE8EE" box="[589,675,401,425]" metricMagnitude="-3" metricUnit="m" metricValue="8.9" pageId="16" pageNumber="109" unit="mm" value="8.9">8.9 mm</quantity>
in the anterior shell area) and moderately inflated. The ratio of shell width to its height is 0.610.80, and the ratio of shell height to its length is 0.460.62. The umbo is wide projecting considerably above the dorsal margin. Umbo sculpture is wrinkled or consists of double-looped waves and knobs. Periostracum ranges from green to dark brown, sometimes with rays from the umbo to the ventral margin. Nacre is light blue, light violet or pinkish-white. Pseudocardinal teeth are flattened relatively thick (2.53.0 mm) and curved. The outer and inner pseudocardinal teeth of the left valve are generally separated with similar lengths and levels of projection, but occasionally the inner is higher than the outer pseudocardinal tooth. A dark strip on the foot may be well pronounced or not. The papillae of the incurrent aperture are short, conic, and located in two rows close to each other.
</paragraph>
<paragraph id="8BA14551FFCE6D0DFF1AFD0AFA83EA1E" blockId="16.[151,1437,401,930]" pageId="16" pageNumber="109">
<emphasis id="B96A9943FFCE6D0DFF1AFD0AFEE2EBA9" bold="true" box="[199,365,725,750]" pageId="16" pageNumber="109">Comparisons.</emphasis>
This species differs from
<taxonomicName id="4C1E3ED2FFCE6D0DFD7EFD09FCA1EBAA" box="[675,814,726,749]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="pictorum">
<emphasis id="B96A9943FFCE6D0DFD7EFD09FCA1EBAA" box="[675,814,726,749]" italics="true" pageId="16" pageNumber="109">U. pictorum</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1E3ED2FFCE6D0DFCB6FD09FC65EBA9" box="[875,1002,725,750]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="tumidus">
<emphasis id="B96A9943FFCE6D0DFCB6FD09FC65EBA9" box="[875,1002,725,750]" italics="true" pageId="16" pageNumber="109">U. tumidus</emphasis>
</taxonomicName>
by having an oval shell shape, often wrinkled umbo sculpture and a higher shell height/length ratio (0.460.62). The labial palps in
<taxonomicName id="4C1E3ED2FFCE6D0DFB28FD25FAE0EA56" box="[1269,1391,762,785]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="crassus">
<emphasis id="B96A9943FFCE6D0DFB28FD25FAE0EA56" box="[1269,1391,762,785]" italics="true" pageId="16" pageNumber="109">U. crassus</emphasis>
</taxonomicName>
are longer and larger than in
<taxonomicName id="4C1E3ED2FFCE6D0DFE1CFCC1FDC4EA72" box="[449,587,798,821]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="pictorum">
<emphasis id="B96A9943FFCE6D0DFE1CFCC1FDC4EA72" box="[449,587,798,821]" italics="true" pageId="16" pageNumber="109">U. pictorum</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1E3ED2FFCE6D0DFD54FCC1FC88EA71" box="[649,775,797,822]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="tumidus">
<emphasis id="B96A9943FFCE6D0DFD54FCC1FC88EA71" box="[649,775,797,822]" italics="true" pageId="16" pageNumber="109">U. tumidus</emphasis>
</taxonomicName>
. The papillae of the incurrent aperture of
<taxonomicName id="4C1E3ED2FFCE6D0DFB2BFCC1FAFFEA72" box="[1270,1392,798,821]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="crassus">
<emphasis id="B96A9943FFCE6D0DFB2BFCC1FAFFEA72" box="[1270,1392,798,821]" italics="true" pageId="16" pageNumber="109">U. crassus</emphasis>
</taxonomicName>
are shorter and arranged in two rows, whereas there are three to four rows in
<taxonomicName id="4C1E3ED2FFCE6D0DFC11FC9DFBDBEA1E" box="[972,1108,834,857]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="pictorum">
<emphasis id="B96A9943FFCE6D0DFC11FC9DFBDBEA1E" box="[972,1108,834,857]" italics="true" pageId="16" pageNumber="109">U. pictorum</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1E3ED2FFCE6D0DFB57FC9DFA8AEA1D" box="[1162,1285,833,858]" class="Bivalvia" family="Unionidae" genus="Unio" kingdom="Animalia" order="Unionoida" pageId="16" pageNumber="109" phylum="Mollusca" rank="species" species="tumidus">
<emphasis id="B96A9943FFCE6D0DFB57FC9DFA8AEA1D" box="[1162,1285,833,858]" italics="true" pageId="16" pageNumber="109">U. tumidus</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="C30416DAFFCE6D0DFF1AFCBAFCF4EAE5" pageId="16" pageNumber="109" type="distribution">
<paragraph id="8BA14551FFCE6D0DFF1AFCBAFCF4EAE5" blockId="16.[151,1437,401,930]" pageId="16" pageNumber="109">
<emphasis id="B96A9943FFCE6D0DFF1AFCBAFEEFEA39" bold="true" box="[199,352,869,894]" pageId="16" pageNumber="109">Distribution.</emphasis>
In the
<collectingCountry id="F30905C1FFCE6D0DFE6DFCBAFD85EA39" box="[432,522,869,894]" name="Ukraine" pageId="16" pageNumber="109">Ukraine</collectingCountry>
and European
<collectingCountry id="F30905C1FFCE6D0DFD68FCBAFC8FEA39" box="[693,768,869,894]" name="Russia" pageId="16" pageNumber="109">Russia</collectingCountry>
restricted to the Black, Caspian and Baltic Sea basins, also found in a restricted range in Transbaikalia, Asian
<collectingCountry id="F30905C1FFCE6D0DFD13FC56FC96EAE5" box="[718,793,905,930]" name="Russia" pageId="16" pageNumber="109">Russia</collectingCountry>
(
<figureCitation id="132559D4FFCE6D0DFCF5FC56FCE5EAE5" box="[808,874,905,930]" captionStart="FIGURE 1" captionStartId="1.[151,250,1491,1513]" captionTargetBox="[166,1424,627,1436]" captionTargetId="figure@1.[151,1436,614,1449]" captionTargetPageId="1" captionText="FIGURE 1. Regions of study and localities of collection of Unio species. A, overview map of Eurasia. B, the Ukraine. C, European Russia. Symbols: U = Ukraine, ER = European Russia, T = Transbaikalian refuge." httpUri="https://zenodo.org/record/828334/files/figure.png" pageId="16" pageNumber="109">Fig. 1</figureCitation>
).
</paragraph>
</subSubSection>
</treatment>
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