181 lines
20 KiB
XML
181 lines
20 KiB
XML
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<mods:title id="02AEE5690BDAF49147FA4DF4CDEB4BA7">Two bathyal hydroids (Hydrozoa: Leptothecata) from the Southwest Indian Ocean</mods:title>
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<mods:name id="D2C3056C24BC3632DC97FC4E8571738F" type="personal">
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<mods:namePart id="16AB601643C38113575EDD93F497753C">Watson, Jeanette E.</mods:namePart>
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<mods:title id="69A0E40E7CDE5C6C68D38D112B4C2465">Zootaxa</mods:title>
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<mods:date id="15D6079902AA8BC7EE89D99BB344E90E">2017</mods:date>
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<mods:number id="6194DC2A5886D341DC5DCA874DE96E60">4247</mods:number>
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<mods:number id="2862E6247474AFAEAA0CB7F8B874790B">3</mods:number>
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<mods:identifier id="126EC12CC61C1AC98A4CA6E2F42381A9" type="DOI">10.11646/zootaxa.4247.3.9</mods:identifier>
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<treatment id="A02815709040FF8EFF7AFA84FEFFFD66" ID-DOI="http://doi.org/10.5281/zenodo.6052043" ID-GBIF-Taxon="127903466" ID-Zenodo-Dep="6052043" LSID="urn:lsid:plazi:treatment:A02815709040FF8EFF7AFA84FEFFFD66" httpUri="http://treatment.plazi.org/id/A02815709040FF8EFF7AFA84FEFFFD66" lastPageId="4" lastPageNumber="340" pageId="2" pageNumber="338">
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<subSubSection id="609BF7ED9040FF88FF7AFA84FC82FAB1" box="[151,803,1311,1338]" pageId="2" pageNumber="338" type="nomenclature">
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<paragraph id="283EA4669040FF88FF7AFA84FC82FAB1" blockId="2.[151,1436,1276,2028]" box="[151,803,1311,1338]" pageId="2" pageNumber="338">
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<heading id="7376130A9040FF88FF7AFA84FC82FAB1" bold="true" box="[151,803,1311,1338]" fontSize="11" level="1" pageId="2" pageNumber="338" reason="1">
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<emphasis id="1AF578749040FF88FF7AFA84FC82FAB1" bold="true" box="[151,803,1311,1338]" pageId="2" pageNumber="338">
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<taxonomicName id="EF81DFE59040FF88FF7AFA84FDC1FAB1" authority="Millard, 1977" authorityName="Millard" authorityYear="1977" box="[151,608,1311,1338]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="2" pageNumber="338" phylum="Cnidaria" rank="species" species="crozetensis">
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<emphasis id="1AF578749040FF88FF7AFA84FE11FAB2" bold="true" box="[151,432,1311,1337]" italics="true" pageId="2" pageNumber="338">Zygophylax crozetensis</emphasis>
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<bibRefCitation id="4C10D9979040FF88FE5AFABBFDC1FAB1" author="Millard" box="[439,608,1312,1338]" pageId="2" pageNumber="338" refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47." type="journal article" year="1977">Millard, 1977</bibRefCitation>
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</taxonomicName>
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(
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<figureCitation id="B0BAB8E39040FF88FD82FABBFCBAFAB1" box="[623,795,1312,1338]" captionStart="FIGURE 2" captionStartId="3.[151,244,1967,1989]" captionTargetBox="[271,1293,319,1907]" captionTargetId="figure@3.[231,1356,295,1967]" captionTargetPageId="3" captionText="FIGURE 2. A – D Zygophylax crozetensis Millard, 1977. 2 A, part of branch. 2 B, hydrocladium. 2 C, hydrotheca. 2 D, nematotheca. Scale bar: A, 1.0 mm. B, 0.5 mm. C, 0.2 mm. D, 0.1 mm." httpUri="https://zenodo.org/record/438602/files/figure.png" pageId="2" pageNumber="338">Figure 2 A–D</figureCitation>
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)
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="609BF7ED9040FF88FF7AFADAFC29FAD2" box="[151,904,1345,1369]" pageId="2" pageNumber="338" type="reference_group">
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<paragraph id="283EA4669040FF88FF7AFADAFC29FAD2" blockId="2.[151,1436,1276,2028]" box="[151,904,1345,1369]" pageId="2" pageNumber="338">
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<treatmentCitationGroup id="089183489040FF88FF7AFADAFC29FAD2" box="[151,904,1345,1369]" pageId="2" pageNumber="338">
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<taxonomicName id="EF81DFE59040FF88FF7AFADAFDF3FAD2" authority="Millard, 1977: 15" authorityName="Millard" authorityPageNumber="15" authorityYear="1977" box="[151,594,1345,1369]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="2" pageNumber="338" phylum="Cnidaria" rank="species" species="crozetensis">
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<emphasis id="1AF578749040FF88FF7AFADAFE2EFAD2" box="[151,399,1345,1369]" italics="true" pageId="2" pageNumber="338">Zygophylax crozetensis</emphasis>
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<treatmentCitation id="A92082779040FF88FE7BFAD9FDF3FAD2" author="Millard" box="[406,594,1346,1369]" page="15" pageId="2" pageNumber="338" year="1977">
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<bibRefCitation id="4C10D9979040FF88FE7BFAD9FD8DFAD2" author="Millard" box="[406,556,1346,1369]" pageId="2" pageNumber="338" refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47." type="journal article" year="1977">Millard, 1977</bibRefCitation>
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: 15
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</treatmentCitation>
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</taxonomicName>
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, fig. 4.—
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<treatmentCitation id="A92082779040FF88FD5BFAD9FC22FAD2" author="Millard" box="[694,899,1346,1369]" page="140" pageId="2" pageNumber="338" year="1979">
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<bibRefCitation id="4C10D9979040FF88FD5BFAD9FCEFFAD2" author="Millard" box="[694,846,1346,1369]" pageId="2" pageNumber="338" refString="Millard, N. A. H. (1979) Type specimens of Hydroida (Coelenterata) in the South African Museum. Annals of the South African Museum, 77 (8), 133 - 150." type="journal article" year="1979">Millard, 1979</bibRefCitation>
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: 140
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</treatmentCitation>
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.
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</treatmentCitationGroup>
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</paragraph>
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</subSubSection>
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<subSubSection id="609BF7ED9040FF88FF7AFAFEFECCFA14" pageId="2" pageNumber="338" type="materials_examined">
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<paragraph id="283EA4669040FF88FF7AFAFEFECCFA14" blockId="2.[151,1436,1276,2028]" pageId="2" pageNumber="338">
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<materialsCitation id="98E9AE3B9040FF88FF7AFAFEFECCFA14" ID-GBIF-Occurrence="1450621014" collectionCode="NHM" country="United Kingdom" county="Southwest Indian Ocean Ridge" elevation="732" latitude="-41.371834" location="Material" longLatPrecision="694" longitude="54.95" municipality="Coral Seamount" pageId="2" pageNumber="338" specimenCount="732">
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<emphasis id="1AF578749040FF88FF7AFAFEFECEFAF7" bold="true" box="[151,367,1381,1404]" pageId="2" pageNumber="338">
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<location id="2D5EF2BD9040FF88FF7AFAFEFF5BFAF7" LSID="urn:lsid:plazi:treatment:A02815709040FF8EFF7AFA84FEFFFD66:2D5EF2BD9040FF88FF7AFAFEFF5BFAF7" box="[151,250,1381,1404]" country="United Kingdom" county="Southwest Indian Ocean Ridge" latitude="-41.371834" longLatPrecision="694" longitude="54.95" municipality="Coral Seamount" name="Material" pageId="2" pageNumber="338">Material</location>
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examined
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</emphasis>
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.
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<collectionCode id="4E903CA39040FF88FE93FAFEFE1DFAF7" box="[382,444,1381,1404]" country="United Kingdom" httpUri="http://biocol.org/urn:lsid:biocol.org:col:14908" name="University of Nottingham" pageId="2" pageNumber="338">NHM</collectionCode>
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<collectingCountry id="5096E4F69040FF88FE29FAFEFE4BFAF7" box="[452,490,1381,1404]" name="United Kingdom" pageId="2" pageNumber="338">UK</collectingCountry>
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2016.2, microslide,
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<collectingMunicipality id="C85A3E1C9040FF88FD27FAFEFCDBFAF7" box="[714,890,1381,1404]" pageId="2" pageNumber="338">Coral Seamount</collectingMunicipality>
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,
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<collectingCounty id="C15FDCEA9040FF88FC6AFAFEFB77FAF7" box="[903,1238,1381,1404]" pageId="2" pageNumber="338">Southwest Indian Ocean Ridge</collectingCounty>
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(
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<geoCoordinate id="4DB5C2A19040FF88FB0BFAFEFAC8FAF7" box="[1254,1385,1381,1404]" direction="south" orientation="latitude" pageId="2" pageNumber="338" precision="9" value="-41.371834">41° 22.31’S</geoCoordinate>
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,
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<geoCoordinate id="4DB5C2A19040FF88FA9BFAFEFF6CFA14" direction="east" orientation="longitude" pageId="2" pageNumber="338" precision="925" value="54.95">54° 57’E</geoCoordinate>
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), depth
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<specimenCount id="3E876FEF9040FF88FECEFA13FECCFA14" box="[291,365,1416,1439]" pageId="2" pageNumber="338" type="generic">
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<elevation id="A3AC43559040FF88FECEFA13FEC8FA14" box="[291,361,1416,1439]" metricMagnitude="2" metricUnit="m" metricValue="7.32" pageId="2" pageNumber="338" unit="m" value="732.0">
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<quantity id="EF7909839040FF88FECEFA13FEC8FA14" box="[291,361,1416,1439]" metricMagnitude="2" metricUnit="m" metricValue="7.32" pageId="2" pageNumber="338" unit="m" value="732.0">732 m</quantity>
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</elevation>
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.
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</specimenCount>
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</materialsCitation>
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</paragraph>
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</subSubSection>
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<subSubSection id="609BF7ED9040FF88FF2AFA31FE90F8B4" pageId="2" pageNumber="338" type="description">
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<paragraph id="283EA4669040FF88FF2AFA31FD4CFA6F" blockId="2.[151,1436,1276,2028]" pageId="2" pageNumber="338">
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<emphasis id="1AF578749040FF88FF2AFA31FEF3FA4A" bold="true" box="[199,338,1450,1473]" pageId="2" pageNumber="338">Description.</emphasis>
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An infertile fragment
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<quantity id="EF7909839040FF88FD88FA31FD19FA4A" box="[613,696,1450,1473]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="2" pageNumber="338" unit="mm" value="10.0">10 mm</quantity>
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long, pinnate, lax, planar, alternately branched, a few parallel polysiphonic tubes running for a short distance up stem.
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</paragraph>
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<paragraph id="283EA4669040FF88FF2AFA6BFEE2F972" blockId="2.[151,1436,1276,2028]" pageId="2" pageNumber="338">
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Hydrocladia alternate, diverging at an angle of 45–90° to stem. Hydrocladium (broken off at tip)
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<quantity id="EF7909839040FF88FB3CFA6BFAAEF98C" box="[1233,1295,1520,1543]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="2" pageNumber="338" unit="mm" value="4.0">4 mm</quantity>
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long with 10 hydrothecae, usually an axillar hydrotheca at base of hydrocladium. Apophysis of stem large, blister-like, a slight twist or partial node between apophysis and hydrotheca. Hydrothecae alternate, diverging at an angle of 30–50° from hydrocladium, body long, campanulate, some hydrothecae borne on accessory stem tubes. Abcauline wall straight to weakly concave, adcauline wall slightly convex, margin circular, oblique to axial tube, some everted and some with one or two replications. Diaphragm distinct, transverse to oblique, with central foramen and a few thorn–shaped desmocytes just above. Nematotheca deep tubular, expanding a little to margin, seated on a very short pedicel, margin circular, slightly everted.
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</paragraph>
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<paragraph id="283EA4669040FF88FF2AF89EFE90F8B4" blockId="2.[151,1436,1276,2028]" pageId="2" pageNumber="338">Perisarc of stem glassy, transparent (preserved material), moderately thick, thinner on hydrothecae, very thin on nematothecae.</paragraph>
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</subSubSection>
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<subSubSection id="609BF7ED9040FF8EFF2AF8D1FEFFFD66" lastPageId="4" lastPageNumber="340" pageId="2" pageNumber="338" type="discussion">
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<paragraph id="283EA4669040FF88FF2AF8D1FDFEF842" blockId="2.[151,1436,1276,2028]" pageId="2" pageNumber="338">
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<emphasis id="1AF578749040FF88FF2AF8D1FE94F8EA" bold="true" box="[199,309,1866,1889]" pageId="2" pageNumber="338">Remarks.</emphasis>
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<taxonomicName id="EF81DFE59040FF88FED2F8D2FD98F8EA" box="[319,569,1865,1889]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="2" pageNumber="338" phylum="Cnidaria" rank="species" species="crozetensis">
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<emphasis id="1AF578749040FF88FED2F8D2FD98F8EA" box="[319,569,1865,1889]" italics="true" pageId="2" pageNumber="338">Zygophylax crozetensis</emphasis>
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</taxonomicName>
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is recorded from
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<quantity id="EF7909839040FF88FCEEF8D1FCE8F8EA" box="[771,841,1866,1889]" metricMagnitude="2" metricUnit="m" metricValue="1.8" pageId="2" pageNumber="338" unit="m" value="180.0">180 m</quantity>
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deep at the Crozet Islands (
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<bibRefCitation id="4C10D9979040FF88FB6FF8D1FAB4F8EA" author="Millard" box="[1154,1301,1866,1889]" pageId="2" pageNumber="338" refString="Millard, N. A. H. (1977) Hydroids from the Kerguelen and Crozet shelves, collected by the cruise MD. 03 of the Marion-Dufresne. Annals of the South African Museum, 73 (1), 1 - 47." type="journal article" year="1977">Millard 1977</bibRefCitation>
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;
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<bibRefCitation id="4C10D9979040FF88FAC9F8D1FAFCF8EA" author="Millard" box="[1316,1373,1866,1889]" pageId="2" pageNumber="338" refString="Millard, N. A. H. (1979) Type specimens of Hydroida (Coelenterata) in the South African Museum. Annals of the South African Museum, 77 (8), 133 - 150." type="journal article" year="1979">1979</bibRefCitation>
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). The present specimen agrees in most respects with Millard’s description and dimensions, in particular the twisted and swollen hydrothecal pedicel. Comparison of the single complete nematotheca in the present specimen with Millard’s description strongly indicates the species are identical.
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</paragraph>
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<paragraph id="283EA4669040FF88FF2AF84EFA3DF867" blockId="2.[151,1436,1276,2028]" box="[199,1436,2004,2028]" pageId="2" pageNumber="338">
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The present specimen is lax and colourless, in contrast to the usual horny texture and brown colour of
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<emphasis id="1AF578749040FF88FAF4F84FFA3DF867" box="[1305,1436,2004,2028]" italics="true" pageId="2" pageNumber="338">
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<taxonomicName id="EF81DFE59040FF88FAF4F84FFA38F867" box="[1305,1433,2004,2028]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="2" pageNumber="338" phylum="Cnidaria" rank="genus">Zygophylax</taxonomicName>
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.
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</emphasis>
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</paragraph>
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<paragraph id="283EA4669041FF89FF7AFF03FF56FF7F" blockId="3.[151,1436,151,244]" pageId="3" pageNumber="339">
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The small round holes in the hydrocaulus of
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<taxonomicName id="EF81DFE59041FF89FD9BFF0CFBB3FF24" authority="Allman, 1888" authorityName="Allman" authorityYear="1888" box="[630,1042,151,175]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="3" pageNumber="339" phylum="Cnidaria" rank="species" species="cyathifera">
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<emphasis id="1AF578749041FF89FD9BFF0CFCC7FF24" box="[630,870,151,175]" italics="true" pageId="3" pageNumber="339">Zygophylax cyathifera</emphasis>
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(
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<bibRefCitation id="4C10D9979041FF89FC99FF03FBABFF24" author="Allman" box="[884,1034,152,175]" pageId="3" pageNumber="339" refString="Allman, G. J. (1888) Report on the Hydroida dredged by H. M. S. Challenger during the years 1873 - 76. Part II. The Tubularinae, Corymorphinae, Campanularinae, Sertularinae and Thalamorphora. Report on the Scientific Results of the Loyage of HMS Challenger 1873 - 76, Zoology, 23, 1 - 90." type="journal article" year="1888">Allman, 1888</bibRefCitation>
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|||
|
)
|
|||
|
</taxonomicName>
|
|||
|
reported by
|
|||
|
<bibRefCitation id="4C10D9979041FF89FB77FF03FA3DFF24" author="Rees" box="[1178,1436,152,175]" pageId="3" pageNumber="339" refString="Rees, W. J. & Vervoort, W. (1987) Hydroids of the John Murray expedition to the Indian Ocean, with revisory notes on Hydrodendron, Abietinella, Cryptolaria and Zygophylax (Cnidaria, Hydrozoa). Zoologische Lerhandelingen, 237, 1 - 209." type="journal article" year="1987">Rees & Vervoort (1987)</bibRefCitation>
|
|||
|
also occur in the present specimen; they are hydrostatic pores for equilibration of internal cauline with external water pressure.
|
|||
|
</paragraph>
|
|||
|
<caption id="7CFEF4EE9041FF89FF7AF834FD1FF86A" httpUri="https://zenodo.org/record/438602/files/figure.png" pageId="3" pageNumber="339" targetBox="[271,1293,319,1907]" targetPageId="3">
|
|||
|
<paragraph id="283EA4669041FF89FF7AF834FD1FF86A" blockId="3.[151,1437,1967,2017]" pageId="3" pageNumber="339">
|
|||
|
<emphasis id="1AF578749041FF89FF7AF834FEAEF84E" bold="true" box="[151,271,1967,1989]" pageId="3" pageNumber="339">FIGURE 2.</emphasis>
|
|||
|
A–D
|
|||
|
<taxonomicName id="EF81DFE59041FF89FEA0F834FD61F84F" authority="Millard, 1977" authorityName="Millard" authorityYear="1977" box="[333,704,1967,1988]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="3" pageNumber="339" phylum="Cnidaria" rank="species" species="crozetensis">
|
|||
|
<emphasis id="1AF578749041FF89FEA0F834FD8FF84F" box="[333,558,1967,1988]" italics="true" pageId="3" pageNumber="339">Zygophylax crozetensis</emphasis>
|
|||
|
Millard, 1977
|
|||
|
</taxonomicName>
|
|||
|
. 2A, part of branch. 2B, hydrocladium. 2C, hydrotheca. 2D, nematotheca. Scale bar: A, 1.0 mm. B, 0.5 mm. C, 0.2 mm. D, 0.1 mm.
|
|||
|
</paragraph>
|
|||
|
</caption>
|
|||
|
<paragraph id="283EA4669046FF8EFF7AFF03FD2BFF24" blockId="4.[151,650,151,175]" box="[151,650,151,175]" pageId="4" pageNumber="340">
|
|||
|
Measurements (µm) of
|
|||
|
<taxonomicName id="EF81DFE59046FF8EFE7FFF0CFD2BFF24" box="[402,650,151,175]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="4" pageNumber="340" phylum="Cnidaria" rank="species" species="crozetensis">
|
|||
|
<emphasis id="1AF578749046FF8EFE7FFF0CFD2BFF24" box="[402,650,151,175]" italics="true" pageId="4" pageNumber="340">Zygophylax crozetensis</emphasis>
|
|||
|
</taxonomicName>
|
|||
|
</paragraph>
|
|||
|
<paragraph id="283EA4669046FF8EFF70FF51FEADFEF4" blockId="4.[157,1010,202,623]" pageId="4" pageNumber="340">Distance between alternate hydrocladia 800–900 Stem and hydrocladia, width 88–96 distance between alternate hydrocladial hydrothecae 440–496 Apophysis, depth 72–96 Hydrotheca</paragraph>
|
|||
|
<paragraph id="283EA4669046FF8EFF4EFE09FEBAFD94" blockId="4.[157,1010,202,623]" pageId="4" pageNumber="340">length, diaphragm to margin 328–400 width of margin 160–184 width at diaphragm 72–88 Nematotheca</paragraph>
|
|||
|
<paragraph id="283EA4669046FF8EFF4EFDA9FEFFFD66" blockId="4.[157,1010,202,623]" lastBlockId="4.[151,1436,692,749]" pageId="4" pageNumber="340">
|
|||
|
length 68–84 width at margin 40–48
|
|||
|
<emphasis id="1AF578749046FF8EFF2AFD2EFEF3FD47" bold="true" box="[199,338,693,716]" pageId="4" pageNumber="340">Distribution</emphasis>
|
|||
|
. This is the second record of
|
|||
|
<taxonomicName id="EF81DFE59046FF8EFD7CFD2FFC28FD47" box="[657,905,692,716]" class="Hydrozoa" family="Lafoeidae" genus="Zygophylax" kingdom="Animalia" order="Leptothecata" pageId="4" pageNumber="340" phylum="Cnidaria" rank="species" species="crozetensis">
|
|||
|
<emphasis id="1AF578749046FF8EFD7CFD2FFC28FD47" box="[657,905,692,716]" italics="true" pageId="4" pageNumber="340">Zygophylax crozetensis</emphasis>
|
|||
|
</taxonomicName>
|
|||
|
; previously known only from the
|
|||
|
<typeStatus id="F73A1AC49046FF8EFB14FD2EFA86FD47" box="[1273,1319,693,716]" pageId="4" pageNumber="340">type</typeStatus>
|
|||
|
locality of the Crozet Islands.
|
|||
|
</paragraph>
|
|||
|
</subSubSection>
|
|||
|
</treatment>
|
|||
|
</document>
|