159 lines
18 KiB
XML
159 lines
18 KiB
XML
<document id="6870B8B973825EFAE01D0673136211F8" ID-DOI="10.5281/zenodo.170186" ID-GBIF-Dataset="d91ae7dd-a600-4f24-a890-7201060d61b6" ID-ISSN="11755326" ID-Zenodo-Dep="170186" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1459751486132" checkinUser="plazi" docAuthor="Davids, Kees, Sabatino, Antonio Di, Gerecke, Reinhard, Gledhill, Terence & Smit, Harry" docDate="2005" docId="03F7DE69B04DFFECFEF6FDA7FC668704" docLanguage="en" docName="zt01061p064.pdf" docOrigin="Zootaxa 1061" docStyle="DocumentStyle:FA7E419B012A62B0FC3AC15A186C3DAF.3:Zootaxa.2001-2006.journal_article" docStyleId="FA7E419B012A62B0FC3AC15A186C3DAF" docStyleName="Zootaxa.2001-2006.journal_article" docStyleVersion="3" docTitle="Hydrachna distincta Koenike 1897" docType="treatment" docVersion="8" lastPageNumber="41" masterDocId="FFCEA611B04BFFEAFFFEFFABFFDF8075" masterDocTitle="On the taxonomy of water mites (Acari: Hydrachnidia) described from the Palaearctic, part 1: Hydrachnidae, Limnocharidae and Eylaidae" masterLastPageNumber="64" masterPageNumber="36" pageNumber="41" updateTime="1698211877776" updateUser="plazi">
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<mods:title id="76620C53E8E04E4A3FA0EC8A73C859FC">On the taxonomy of water mites (Acari: Hydrachnidia) described from the Palaearctic, part 1: Hydrachnidae, Limnocharidae and Eylaidae</mods:title>
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<mods:namePart id="034753DAA6B616B333630EB51B2C3D8E">Davids, Kees</mods:namePart>
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<mods:namePart id="382707884CC969D94494D12204DC0513">Sabatino, Antonio Di</mods:namePart>
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<mods:namePart id="C4939223ED20C353CB9C54C85DDFA434">Gerecke, Reinhard</mods:namePart>
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<mods:namePart id="F910ED0A876BC47DB7545713D5C52AEB">Gledhill, Terence</mods:namePart>
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<mods:namePart id="992D715039ADA8D626BBC20FEFF0DE05">Smit, Harry</mods:namePart>
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<mods:date id="432D155F4A4044D1C13CBA45D866C9FC">2005</mods:date>
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<mods:number id="69503612E4C0351ADAC341B19E77D6C5">1061</mods:number>
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<mods:identifier id="18D2FD10D4BDB16C312870ECDDED304D" type="DOI">10.5281/zenodo.170186</mods:identifier>
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<treatment id="03F7DE69B04DFFECFEF6FDA7FC668704" ID-DOI="http://doi.org/10.5281/zenodo.6267627" ID-GBIF-Taxon="119337830" ID-Zenodo-Dep="6267627" LSID="urn:lsid:plazi:treatment:03F7DE69B04DFFECFEF6FDA7FC668704" httpUri="http://treatment.plazi.org/id/03F7DE69B04DFFECFEF6FDA7FC668704" lastPageNumber="41" pageId="6" pageNumber="41">
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<subSubSection id="C3443CF4B04DFFECFEF6FDA7FD688250" box="[264,695,523,550]" pageId="6" pageNumber="41" type="nomenclature">
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<paragraph id="8BE16F7FB04DFFECFEF6FDA7FD688250" blockId="6.[264,695,523,550]" box="[264,695,523,550]" pageId="6" pageNumber="41">
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<heading id="D0A9D813B04DFFECFEF6FDA7FD688250" bold="true" box="[264,695,523,550]" fontSize="11" level="1" pageId="6" pageNumber="41" reason="1">
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<taxonomicName id="4C5E14FCB04DFFECFEF6FDA7FD688250" authority="Koenike, 1897" authorityName="Koenike" authorityYear="1897" box="[264,695,523,550]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFEF6FDA7FD688250" bold="true" box="[264,695,523,550]" pageId="6" pageNumber="41">
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<emphasis id="B92AB36DB04DFFECFEF6FDA7FE218253" bold="true" box="[264,510,524,550]" italics="true" pageId="6" pageNumber="41">Hydrachna distincta</emphasis>
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<bibRefCitation id="EFCF128EB04DFFECFDF8FDA0FD688250" author="Koenike" box="[518,695,523,549]" pageId="6" pageNumber="63" refString="Koenike, F. (1897) Zur Systematik der Gattung Eylais LATR. (Vorlaufige Mittheilung). Abhandlungen herausgegeben vom naturwissenschaftlichen Verein Bremen, 14, 279 - 295." type="journal article" year="1897">Koenike, 1897</bibRefCitation>
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</emphasis>
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</taxonomicName>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C3443CF4B04DFFECFEF6FDFCFC668704" pageId="6" pageNumber="41" type="materials_examined">
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<paragraph id="8BE16F7FB04DFFECFEF6FDFCFE4082EC" blockId="6.[264,1325,599,1905]" pageId="6" pageNumber="41">
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Material examined:
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<typeStatus id="54E5D1DDB04DFFECFE0AFDFCFDBE8204" box="[500,609,599,625]" pageId="6" pageNumber="41" type="holotype">Holotype</typeStatus>
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female
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<collectionCode id="ED4FF7BAB04DFFECFD3EFDFCFCCA8204" box="[704,789,599,625]" httpUri="http://grbio.org/cool/8z6v-f8is" name="Saskatchewan Museum of Natural History" pageId="6" pageNumber="41">SMNH</collectionCode>
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555, "Holstein, Plön, Drecksee Dr. Zacharias leg.
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<date id="FFE049BFB04DFFECFEC4FDD4FE5B82EC" box="[314,388,639,665]" pageId="6" pageNumber="41" value="86-07-08">8.7.86</date>
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".
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</paragraph>
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<paragraph id="8BE16F7FB04DFFECFEC6FD0CFC668704" blockId="6.[264,1325,599,1905]" pageId="6" pageNumber="41">
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Discussion: The preparation is completely desiccated, with most legs detached and broken into parts, gnathosoma detached, laterally, with base destroyed, chelicerae broken into pieces, one palp entire, the other lacking P35; frontalia and lateral eyes separate. The ventral idiosoma is mounted upsidedown (genital field and coxae visible from the internal side). In this position it is seen that acetabula also extend to the internallybent lateral margin of the genital plate, here obviously facing the surrounding folded in membranous integument. The palp (obviously not distorted) and gnathosomal rostrum agree with
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<taxonomicName id="4C5E14FCB04DFFECFAF0FC3CFEB483AD" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFAF0FC3CFEB483AD" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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</taxonomicName>
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. In the original publication Koenike described the genital field as similar to
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<taxonomicName id="4C5E14FCB04DFFECFAF0FC14FEBA8475" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="globosa">
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<emphasis id="B92AB36DB04DFFECFAF0FC14FEBA8475" italics="true" pageId="6" pageNumber="41">H. globosa</emphasis>
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</taxonomicName>
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. Only later (
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<bibRefCitation id="EFCF128EB04DFFECFDFCFC4CFD718474" author="Koenike" box="[514,686,999,1025]" pageId="6" pageNumber="63" refString="Koenike, F. (1909) Acarina, Milben. In: Brauer, A. (Ed.): Die Sußwasserfauna Deutschlands. Jena (G. Fischer), 12, 13 - 184." type="journal article" year="1909">Koenike 1909</bibRefCitation>
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) did he describe the longish shape of this organ; all later text books (
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<bibRefCitation id="EFCF128EB04DFFECFE1DFBA4FCFC845C" author="Soar" box="[483,803,1039,1065]" pageId="6" pageNumber="63" refString="Soar, C. D. & Williamson, W. (1925) The British Hydracarina. Vol. I. London, Ray Society, 110, 1 - 266." type="journal article" year="1925">Soar & Williamson 1925</bibRefCitation>
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,
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<bibRefCitation id="EFCF128EB04DFFECFCC9FBA4FC35845C" author="Sokolow" box="[823,1002,1039,1065]" pageId="6" pageNumber="63" refString="Sokolow, I. (1940) Hydracarina. In: Shadin, W. J. (Ed.): Das Leben der Binnengewasser der USSR, 1, 277 - 300. (in Russian)." type="journal article" year="1940">Sokolow 1940</bibRefCitation>
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) obviously relied on this publication or on the figure given by
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<bibRefCitation id="EFCF128EB04DFFECFD13FB9CFC6F8424" author="Viets" box="[749,944,1079,1105]" pageId="6" pageNumber="64" refString="Viets, K. (1936) Wassermilben oder Hydracarina (Hydrachnellae und Halacaridae). In: Dahl, F. (Ed.): Tierwelt Deutschlands, Jena (G. Fischer), 31, 10 + 1 - 288, 32, 289 - 574." type="journal article" year="1936">K. Viets (1936)</bibRefCitation>
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of the
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<typeStatus id="54E5D1DDB04DFFECFBE9FB9CFB5D8424" box="[1047,1154,1079,1105]" pageId="6" pageNumber="41" type="holotype">holotype</typeStatus>
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. However, as indicated by the key of Soar & Williamson and the examination of a slide in
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<collectionCode id="ED4FF7BAB04DFFECFB2AFBF4FAF4840C" box="[1236,1323,1119,1145]" httpUri="http://grbio.org/cool/49nc-28y0" name="Natural History Museum, Tripoli" pageId="6" pageNumber="41">NHML</collectionCode>
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erroneously ascribed to this species (see under
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<taxonomicName id="4C5E14FCB04DFFECFCBDFB2CFC1284D5" box="[835,973,1159,1184]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFCBDFB2CFC1284D5" box="[835,973,1159,1184]" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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</taxonomicName>
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), generally most weight was given to the shape of the frontal plates. Most records of
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<taxonomicName id="4C5E14FCB04DFFECFC3BFB04FB8D84BD" box="[965,1106,1199,1224]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFC3BFB04FB8D84BD" box="[965,1106,1199,1224]" italics="true" pageId="6" pageNumber="41">H. distincta</emphasis>
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</taxonomicName>
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probably refer to specimens of
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<taxonomicName id="4C5E14FCB04DFFECFE4CFB7CFDE18485" box="[434,574,1239,1264]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFE4CFB7CFDE18485" box="[434,574,1239,1264]" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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</taxonomicName>
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with an equally concave medial margin of the frontalia (see there): This is the case in a specimen in the collection of Koenike attributed to
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<taxonomicName id="4C5E14FCB04DFFECFB5CFB54FAF4856D" box="[1186,1323,1279,1304]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFB5CFB54FAF4856D" box="[1186,1323,1279,1304]" italics="true" pageId="6" pageNumber="41">H. distincta</emphasis>
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</taxonomicName>
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with a question mark, and surely also in the specimens recorded from
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<collectingCountry id="F3492FEFB04DFFECFBAEFA8CFB7C8534" box="[1104,1187,1319,1345]" name="Ireland" pageId="6" pageNumber="41">Ireland</collectingCountry>
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by
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<bibRefCitation id="EFCF128EB04DFFECFB2CFA8CFE87851C" author="Halbert" pageId="6" pageNumber="62" refString="Halbert, J. N. (1911) Acarinida, Sect. 1 Hydracarina. Clare Island Survey 39 (1), Proceedings of the Irish Academy, 31 (2, 39 i), 1 - 44." type="journal article" year="1911">Halbert (1911)</bibRefCitation>
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, who was the only author to describe the male of
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<taxonomicName id="4C5E14FCB04DFFECFC27FAE4FBB8851D" box="[985,1127,1359,1384]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFC27FAE4FBB8851D" box="[985,1127,1359,1384]" italics="true" pageId="6" pageNumber="41">H. distincta</emphasis>
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</taxonomicName>
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. As this author explained, his identification relied exclusively on the shape of the frontal platelets. In view of the male genital field agreeing perfectly with that of
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<taxonomicName id="4C5E14FCB04DFFECFC72FA34FBA785CC" authority="Halbert" authorityName="Halbert" box="[908,1144,1439,1465]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFC72FA34FBCD85CD" box="[908,1042,1439,1464]" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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, Halbert
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</taxonomicName>
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was the first to suggest a possible synonymy of the two species. Nevertheless, the most unusual character of
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<taxonomicName id="4C5E14FCB04DFFECFED9FA44FE6F867D" box="[295,432,1519,1544]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFED9FA44FE6F867D" box="[295,432,1519,1544]" italics="true" pageId="6" pageNumber="41">H. distincta</emphasis>
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</taxonomicName>
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is the elongated female genital field projecting anteriorly between the Cx3, a feature not found in any other European species. As no further female specimens with such a morphology have been described in the past 100 years, it is postulated that this species is based on a misshaped individual of
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<taxonomicName id="4C5E14FCB04DFFECFCA4F9CCFC3786F5" box="[858,1000,1639,1664]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFCA4F9CCFC3786F5" box="[858,1000,1639,1664]" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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</taxonomicName>
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(see
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<bibRefCitation id="EFCF128EB04DFFECFBCAF9CCFB2586F4" author="Lundblad" box="[1076,1274,1639,1665]" pageId="6" pageNumber="63" refString="Lundblad, O. (1962 a) Die Hydracarinen Schwedens. II. Arkiv for Zoologi, (2) 14 (1), 1 - 635." type="journal article" year="1962" yearSuffix="a">Lundblad 1962a</bibRefCitation>
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for descriptions of similar morphological deviations in other species of the genus). However, as
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<bibRefCitation id="EFCF128EB04DFFECFED3F91CFE2A86A4" author="Wainstein" box="[301,501,1719,1745]" pageId="6" pageNumber="64" refString="Wainstein B. A. (1976) [The larvae and system of water mites of the family Hydrachnidae Leach, 1815 (Acariformes).] Institut Biologiji Vnutrennich Vod, Trudy, 31, 133 - 155. (in Russian)." type="journal article" year="1976">Wainstein (1976</bibRefCitation>
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,
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<bibRefCitation id="EFCF128EB04DFFECFDFBF91CFD9E86A4" author="Wainstein" box="[517,577,1719,1745]" pageId="6" pageNumber="64" refString="Wainstein B. A. (1980) [The water mite larvae.] Nauka, Akademia Nauk SSSR, Institut Biologiji Vnutrennich Vod, 1 - 238. (in Russian)." type="book chapter" year="1980">1980</bibRefCitation>
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) described diagnostic characters in the shape of tibiotarsi in larvae which he attributed to
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<taxonomicName id="4C5E14FCB04DFFECFD91F974FD24868D" box="[623,763,1759,1784]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="distincta">
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<emphasis id="B92AB36DB04DFFECFD91F974FD24868D" box="[623,763,1759,1784]" italics="true" pageId="6" pageNumber="41">H. distincta</emphasis>
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</taxonomicName>
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, the question concerning the existence of two possible
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<taxonomicName id="4C5E14FCB04DFFECFE8FF8ACFE258755" box="[369,506,1799,1824]" class="Arachnida" family="Hydrachnidae" genus="Hydrachna" kingdom="Animalia" order="Trombidiformes" pageId="6" pageNumber="41" phylum="Arthropoda" rank="species" species="conjecta">
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<emphasis id="B92AB36DB04DFFECFE8FF8ACFE258755" box="[369,506,1799,1824]" italics="true" pageId="6" pageNumber="41">H. conjecta</emphasis>
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</taxonomicName>
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like sister species remains open and needs further investigation. An earlier publication of the Russian author (
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<bibRefCitation id="EFCF128EB04DFFECFD06F884FC6C873C" author="Wainstein" box="[760,947,1839,1865]" pageId="6" pageNumber="64" refString="Wainstein B. A. (1966) [New species of water mites (Hydrachnellae) of the genus Hydrachna Mull., their taxonomy and biology.] Institut Biologiji Vnutrennich Vod, Trudy, 12, 183 - 191 (in Russian)." type="journal article" year="1966">Wainstein 1966</bibRefCitation>
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) suggests that in separating the two species, he also gave most weight to the frontal plates.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |