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<document id="7D5C8918392B4F023F2E916906C839E8" ID-CLB-Dataset="29821" ID-DOI="10.11646/zootaxa.4441.1.7" ID-GBIF-Dataset="0535eaeb-2e3b-4b6d-9ced-58a61fd02e03" ID-ISSN="1175-5326" ID-Zenodo-Dep="1301927" ID-ZooBank="2D48BC12-329C-4476-BF43-4648B4807E3B" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1529995343642" checkinUser="plazi" docAuthor="Peña Cantero, Álvaro L. &amp; Marzal, Marina Fresneda" docDate="2018" docId="03AC2855FF82FFBFE7FE78BD6C732AE1" docLanguage="en" docName="zootaxa.4441.1.7.pdf" docOrigin="Zootaxa 4441 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Schizotricha auroraaustralis Peña Cantero &amp; Marzal 2018, sp. nov." docType="treatment" docVersion="7" lastPageNumber="132" masterDocId="FF95502DFF8BFFB4E769790B69262D0D" masterDocTitle="Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica)" masterLastPageNumber="136" masterPageNumber="121" pageNumber="130" updateTime="1698551282154" updateUser="ExternalLinkService">
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<mods:title id="A73F6EA9FAED61514169B1146B458E59">Benthic hydroids (Cnidaria: Hydrozoa) from off George V Coast (East Antarctica)</mods:title>
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<mods:name id="71D9505B556749627CF8028D1ED19638" type="personal">
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<mods:namePart id="A3D81983CAA0A5F11CEB3608F8AF7802">Peña Cantero, Álvaro L.</mods:namePart>
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<mods:namePart id="BE4777F47B5AB0166CFC5A71FF7F48C0">Marzal, Marina Fresneda</mods:namePart>
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<mods:title id="1BF9B1E4752330EFCE4FB16376D2DE41">Zootaxa</mods:title>
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<mods:date id="9FEAA73FEBDF5DF0CCEB58D290F1876E">2018</mods:date>
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<mods:number id="77FFB112AF9E3960B5542485FDC40C31">2018-06-26</mods:number>
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<mods:detail id="CF2C6657F52AEA68A7935FEDF4DF9B12" type="volume">
<mods:number id="B38AC9A985144A32B72D37E58225952D">4441</mods:number>
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<mods:identifier id="49D9DBE1910366E3E93B782D0DB2E986" type="DOI">10.11646/zootaxa.4441.1.7</mods:identifier>
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<treatment id="03AC2855FF82FFBFE7FE78BD6C732AE1" ID-DOI="http://doi.org/10.5281/zenodo.6494464" ID-GBIF-Taxon="146019698" ID-Zenodo-Dep="6494464" LSID="urn:lsid:plazi:treatment:03AC2855FF82FFBFE7FE78BD6C732AE1" httpUri="http://treatment.plazi.org/id/03AC2855FF82FFBFE7FE78BD6C732AE1" lastPageId="11" lastPageNumber="132" pageId="9" pageNumber="130">
<subSubSection id="C31FCAC8FF82FFBDE7FE78BD682C2CFF" pageId="9" pageNumber="130" type="nomenclature">
<paragraph id="8BBA9943FF82FFBDE7FE78BD6B702CDD" blockId="9.[151,598,438,498]" box="[151,598,438,464]" pageId="9" pageNumber="130">
<heading id="D0F22E2FFF82FFBDE7FE78BD6B702CDD" bold="true" box="[151,598,438,464]" fontSize="11" level="1" pageId="9" pageNumber="130" reason="1">
<emphasis id="B9714551FF82FFBDE7FE78BD6B702CDD" bold="true" box="[151,598,438,464]" pageId="9" pageNumber="130">
<taxonomicName id="4C05E2C0FF82FFBDE7FE78BD68D42CDD" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[151,498,438,464]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="9" pageNumber="130" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF82FFBDE7FE78BD68D42CDD" bold="true" box="[151,498,438,464]" italics="true" pageId="9" pageNumber="130">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF82FFBDE69178BD6B702CDD" box="[504,598,438,464]" pageId="9" pageNumber="130" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7FE78D2682C2CFF" blockId="9.[151,598,438,498]" box="[151,266,473,498]" pageId="9" pageNumber="130">
(
<figureCitation id="133E85C6FF82FFBDE7F678D268252CFF" box="[159,259,473,498]" captionStart-0="FIGURE 4" captionStart-1="FIGURE 5" captionStartId-0="10.[151,250,1891,1913]" captionStartId-1="11.[151,250,1191,1213]" captionTargetBox-0="[216,1340,204,1851]" captionTargetBox-1="[169,1419,210,1150]" captionTargetId-0="figure@10.[212,1384,193,1868]" captionTargetId-1="figure@11.[151,1436,193,1170]" captionTargetPageId-0="10" captionTargetPageId-1="11" captionText-0="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." captionText-1="FIGURE 5. Schizotricha auroraaustralis sp. nov.: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D)." httpUri-0="https://zenodo.org/record/1301935/files/figure.png" httpUri-1="https://zenodo.org/record/1301937/files/figure.png" pageId="9" pageNumber="130">Figs 4–5</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C31FCAC8FF82FFBDE7FE7B2A6C222F34" box="[151,1284,545,570]" pageId="9" pageNumber="130" type="materials_examined">
<paragraph id="8BBA9943FF82FFBDE7FE7B2A6C222F34" blockId="9.[151,1437,545,1977]" box="[151,1284,545,570]" pageId="9" pageNumber="130">
<emphasis id="B9714551FF82FFBDE7FE7B2A68D42F34" bold="true" box="[151,498,545,570]" pageId="9" pageNumber="130">
Material examined.
<emphasis id="B9714551FF82FFBDE6EE7B2A68D42F34" bold="true" box="[391,498,545,569]" italics="true" pageId="9" pageNumber="130">63EV314</emphasis>
</emphasis>
, a colony
<quantity id="4CFD34A6FF82FFBDE50E7B2A6BE22F34" box="[615,708,545,570]" metricMagnitude="-1" metricUnit="m" metricValue="2.5" pageId="9" pageNumber="130" unit="mm" value="250.0">250 mm</quantity>
high, with gonothecae (Holotype, IK–2009–0483).
</paragraph>
</subSubSection>
<subSubSection id="C31FCAC8FF82FFBDE7AE7B4E6AF72BB1" pageId="9" pageNumber="130" type="description">
<paragraph id="8BBA9943FF82FFBDE7AE7B4E6DB02FC7" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
<emphasis id="B9714551FF82FFBDE7AE7B4E687F2F53" bold="true" box="[199,345,581,606]" pageId="9" pageNumber="130">Description.</emphasis>
Stem polysiphonic, unbranched, composed of a main aXial tube and several accompanying ones, whose number decreases distally; most distal part of stem only with main tube. Main aXial tube on one side of stem, not covered by accessory tubes for most of its length. Main tube divided into homomerous hydrothecate internodes, bearing hydrothecae and nematothecae. Secondary tubes only provided with nematothecae.
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7BDE6C6D2E57" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Cauline internodes with a short apophysis without nematothecae (
<figureCitation id="133E85C6FF82FFBDE4A47BDE6D0C2FE3" box="[973,1066,725,750]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4B</figureCitation>
). Cauline apophyses alternately arranged, forming an angle slightly smaller than 90° at basal part of stem, but opening distally, being almost in one plane at distal part. Cauline internodes (
<figureCitation id="133E85C6FF82FFBDE5087A166B9F2E3B" box="[609,697,797,822]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4B</figureCitation>
) with a hydrotheca at aXil between apophysis and internode and three nematothecae: two flanking hydrothecal aperture and one infrathecal nematotheca (occasionally two).
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7A6E6A18293F" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Cauline apophyses giving rise to hydrocladia, forming an acute angle with stem. A basal ahydrothecate internode, provided with one nematotheca, present between cauline apophysis and first hydrothecate hydrocladial internode (
<figureCitation id="133E85C6FF82FFBDE67A7AA668B72ECB" box="[275,401,941,966]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4A–B</figureCitation>
). Only occasionally basal ahydrothecate internode absent (in this case, cauline apophyses might be slightly longer and have a nematotheca). Hydrocladia homomerously divided into internodes (
<figureCitation id="133E85C6FF82FFBDE25D7ADA6CB62EE7" box="[1332,1424,977,1002]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4A</figureCitation>
), but with a short ahydrothecate internode following hydrocladial apophyses of forked internodes (
<figureCitation id="133E85C6FF82FFBDE3927AFE6C7D2903" box="[1275,1371,1013,1038]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Figs 4A</figureCitation>
,
<figureCitation id="133E85C6FF82FFBDE2037AFE6CA82903" box="[1386,1422,1013,1038]" captionStart="FIGURE 5" captionStartId="11.[151,250,1191,1213]" captionTargetBox="[169,1419,210,1150]" captionTargetId="figure@11.[151,1436,193,1170]" captionTargetPageId="11" captionText="FIGURE 5. Schizotricha auroraaustralis sp. nov.: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D)." httpUri="https://zenodo.org/record/1301937/files/figure.png" pageId="9" pageNumber="130">5A</figureCitation>
), typically provided with one nematotheca (occasionally two).
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7D366BD52807" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Hydrocladia branched, up to fifth order (
<figureCitation id="133E85C6FF82FFBDE5CA7D366A27295B" box="[675,769,1085,1110]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4A</figureCitation>
). Forked hydrocladial internodes following ahydrothecate internodes. Hydrocladial apophyses forming an acute angle with internode, and provided with one or no nematothecae (
<figureCitation id="133E85C6FF82FFBDE6217D8E68F52993" box="[328,467,1157,1182]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4A, C</figureCitation>
). Length of hydrocladial internodes roughly constant along hydrocladia. Forked hydrocladial internodes (
<figureCitation id="133E85C6FF82FFBDE6D57DA26B3929CF" box="[444,543,1193,1218]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Figs 4C</figureCitation>
,
<figureCitation id="133E85C6FF82FFBDE55B7DA26B7329CF" box="[562,597,1193,1218]" captionStart="FIGURE 5" captionStartId="11.[151,250,1191,1213]" captionTargetBox="[169,1419,210,1150]" captionTargetId="figure@11.[151,1436,193,1170]" captionTargetPageId="11" captionText="FIGURE 5. Schizotricha auroraaustralis sp. nov.: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D)." httpUri="https://zenodo.org/record/1301937/files/figure.png" pageId="9" pageNumber="130">5A</figureCitation>
) with an aXillary hydrotheca, two nematothecae flanking hydrothecal aperture, one infrathecal nematotheca (occasionally two), and one nematotheca on apophysis in third and/or fourth internodes (occasionally on the second too) (
<figureCitation id="133E85C6FF82FFBDE5E57DFA6BC12807" box="[652,743,1265,1290]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4A</figureCitation>
).
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7C1E6D53285F" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Unforked hydrothecate hydrocladial internodes (
<figureCitation id="133E85C6FF82FFBDE59C7C1E6A532823" box="[757,885,1301,1326]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Figs 4D–G</figureCitation>
,
<figureCitation id="133E85C6FF82FFBDE4ED7C1E6AE02823" box="[900,966,1301,1326]" captionStart="FIGURE 5" captionStartId="11.[151,250,1191,1213]" captionTargetBox="[169,1419,210,1150]" captionTargetId="figure@11.[151,1436,193,1170]" captionTargetPageId="11" captionText="FIGURE 5. Schizotricha auroraaustralis sp. nov.: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D)." httpUri="https://zenodo.org/record/1301937/files/figure.png" pageId="9" pageNumber="130">5B–C</figureCitation>
) with one hydrotheca in the middle and three nematothecae: two flanking hydrothecal aperture and one infrathecal nematotheca.
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7C566D772894" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Hydrotheca elongate (
<figureCitation id="133E85C6FF82FFBDE6AE7C566B6E287B" box="[455,584,1373,1398]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Figs 4D–G</figureCitation>
,
<figureCitation id="133E85C6FF82FFBDE53E7C566BB8287B" box="[599,670,1373,1398]" captionStart="FIGURE 5" captionStartId="11.[151,250,1191,1213]" captionTargetBox="[169,1419,210,1150]" captionTargetId="figure@11.[151,1436,193,1170]" captionTargetPageId="11" captionText="FIGURE 5. Schizotricha auroraaustralis sp. nov.: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D)." httpUri="https://zenodo.org/record/1301937/files/figure.png" pageId="9" pageNumber="130">5B–D</figureCitation>
), length increasing along hydrocladia. Adcauline wall completely adnate to internode. Abcauline wall straight. Hydrothecal aperture circular; rim even.
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7CAE6D8C2B0B" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
Gonothecae inserted on small apophyses between hydrotheca and infrathecal nematotheca of hydrocladial internodes. Gonothecae elongate pear-shaped (
<figureCitation id="133E85C6FF82FFBDE5CE7CC26A2728EF" box="[679,769,1481,1506]" captionStart="FIGURE 4" captionStartId="10.[151,250,1891,1913]" captionTargetBox="[216,1340,204,1851]" captionTargetId="figure@10.[212,1384,193,1868]" captionTargetPageId="10" captionText="FIGURE 4. Schizotricha auroraaustralis sp. nov.: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H, gonotheca Scale bars: 500 µm (A); 250 µm (B–H)." httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="9" pageNumber="130">Fig. 4H</figureCitation>
), provided with a distal, slightly oblique, circular aperture, and a basal chamber delimited by a circular diaphragm and provided with two nematothecae.
</paragraph>
<paragraph id="8BBA9943FF82FFBDE7AE7F1F6AF72BB1" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
<emphasis id="B9714551FF82FFBDE7AE7F1F68C92B20" bold="true" box="[199,495,1556,1581]" pageId="9" pageNumber="130">Measurements (in µm).</emphasis>
<emphasis id="B9714551FF82FFBDE5697F1F6BA52B21" box="[512,643,1556,1580]" italics="true" pageId="9" pageNumber="130">Hydrotheca</emphasis>
: length, 220–350 (1
<taxonomicName id="4C05E2C0FF82FFBDE4EB7F1B6AE32B20" box="[898,965,1552,1581]" pageId="9" pageNumber="130" rank="subSpecies" subSpecies="and">st and</taxonomicName>
16th unforked hydrocladial internodes, respectively), diameter at aperture, 190–210.
<emphasis id="B9714551FF82FFBDE5CF7F336A9D2B5D" box="[678,955,1592,1616]" italics="true" pageId="9" pageNumber="130">Hydrocladial internodes</emphasis>
: length, 640–800 (1
<taxonomicName id="4C05E2C0FF82FFBDE3CF7F336DC92B5C" box="[1190,1263,1592,1617]" pageId="9" pageNumber="130" rank="subSpecies" subSpecies="and">st and</taxonomicName>
16th unforked hydrocladial internodes, respectively), diameter under hydrotheca, 280–180 (1
<taxonomicName id="4C05E2C0FF82FFBDE37D7F576D7A2B78" box="[1044,1116,1628,1653]" pageId="9" pageNumber="130" rank="subSpecies" subSpecies="and">st and</taxonomicName>
16th unforked hydrocladial internodes, respectively).
<emphasis id="B9714551FF82FFBDE6DE7F8B6BAB2B95" box="[439,653,1664,1688]" italics="true" pageId="9" pageNumber="130">Cauline internodes</emphasis>
: length, 620–720, diameter under apophysis, 260.
<emphasis id="B9714551FF82FFBDE3AD7F8B6C6E2B95" box="[1220,1352,1664,1688]" italics="true" pageId="9" pageNumber="130">
<taxonomicName id="4C05E2C0FF82FFBDE3AD7F8B6C642B95" box="[1220,1346,1664,1688]" class="Magnoliopsida" family="Asteraceae" genus="Gonotheca" higherTaxonomySource="GBIF" kingdom="Plantae" order="Asterales" pageId="9" pageNumber="130" phylum="Tracheophyta" rank="genus">Gonotheca</taxonomicName>
:
</emphasis>
height, 1000–1100, maXimum diameter, 400–500, diameter at aperture, 220–240.
</paragraph>
</subSubSection>
<subSubSection id="C31FCAC8FF82FFBFE7AE7FC36D8D2A51" lastPageId="11" lastPageNumber="132" pageId="9" pageNumber="130" type="discussion">
<paragraph id="8BBA9943FF82FFBDE7AE7FC3680A2AB4" blockId="9.[151,1437,545,1977]" pageId="9" pageNumber="130">
<emphasis id="B9714551FF82FFBDE7AE7FC3681D2BEC" bold="true" box="[199,315,1736,1761]" pageId="9" pageNumber="130">Remarks.</emphasis>
<taxonomicName id="4C05E2C0FF82FFBDE62B7FC36BA22BED" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[322,644,1736,1760]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="9" pageNumber="130" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF82FFBDE62B7FC36BA22BED" box="[322,644,1736,1760]" italics="true" pageId="9" pageNumber="130">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF82FFBDE5E57FC36BC32BEC" box="[652,741,1736,1761]" pageId="9" pageNumber="130" rank="species">
<emphasis id="B9714551FF82FFBDE5E57FC36BC32BEC" bold="true" box="[652,741,1736,1761]" pageId="9" pageNumber="130">sp. nov.</emphasis>
</taxonomicNameLabel>
is recognizable from other Antarctic/sub-Antarctic species of the genus by the constant presence of a single infrathecal nematotheca on the unforked hydrocladial internodes, the forked hydrocladial internodes and the cauline internodes (only occasionally a second nematotheca has been noticed in the last two). In addition, it is also characterized by the presence of one nematotheca on the ahydrothecate internodes, one or none on the hydrocladial apophyses, and none on the cauline apophyses, although when the basal ahydrothecate internode is absent the cauline apophysis may be longer and provided with a nematotheca.
</paragraph>
<caption id="DF7AC9CBFF81FFBEE7FE7E686CBA2AD8" httpUri="https://zenodo.org/record/1301935/files/figure.png" pageId="10" pageNumber="131" startId="10.[151,250,1891,1913]" targetBox="[216,1340,204,1851]" targetPageId="10">
<paragraph id="8BBA9943FF81FFBEE7FE7E686CBA2AD8" blockId="10.[151,1436,1891,2005]" pageId="10" pageNumber="131">
<emphasis id="B9714551FF81FFBEE7FE7E6868342A75" bold="true" box="[151,274,1891,1913]" pageId="10" pageNumber="131">FIGURE 4.</emphasis>
<taxonomicName id="4C05E2C0FF81FFBEE6717E686B1D2A74" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[280,571,1891,1913]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="10" pageNumber="131" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF81FFBEE6717E686B1D2A74" box="[280,571,1891,1913]" italics="true" pageId="10" pageNumber="131">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF81FFBEE5297E686BB62A75" box="[576,656,1891,1912]" pageId="10" pageNumber="131" rank="species">
<emphasis id="B9714551FF81FFBEE5297E686BB62A75" bold="true" box="[576,656,1891,1912]" pageId="10" pageNumber="131">sp. nov.</emphasis>
</taxonomicNameLabel>
: A, hydrocladial branching and hydrothecal disposition; B, cauline internode showing hydrotheca and nematothecae, and first ahydrothecate hydrocladial internode; C, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and two ahydrothecate internodes; D– G, unforked hydrocladial internodes with hydrothecae and nematothecae; H,
<taxonomicName id="4C05E2C0FF81FFBEE4F57EB46D222AD8" box="[924,1028,1983,2005]" class="Magnoliopsida" family="Asteraceae" genus="Gonotheca" higherTaxonomySource="GBIF" kingdom="Plantae" order="Asterales" pageId="10" pageNumber="130" phylum="Tracheophyta" rank="genus">gonotheca</taxonomicName>
Scale bars: 500 µm (A); 250 µm (B–H).
</paragraph>
</caption>
<caption id="DF7AC9CBFF80FFBFE7FE7DAC6C7129F7" httpUri="https://zenodo.org/record/1301937/files/figure.png" pageId="11" pageNumber="132" startId="11.[151,250,1191,1213]" targetBox="[169,1419,210,1150]" targetPageId="11">
<paragraph id="8BBA9943FF80FFBFE7FE7DAC6C7129F7" blockId="11.[151,1435,1191,1274]" pageId="11" pageNumber="132">
<emphasis id="B9714551FF80FFBFE7FE7DAC683229B1" bold="true" box="[151,276,1191,1213]" pageId="11" pageNumber="132">FIGURE 5.</emphasis>
<taxonomicName id="4C05E2C0FF80FFBFE6747DAC6B6429B0" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[285,578,1191,1213]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF80FFBFE6747DAC6B6429B0" box="[285,578,1191,1213]" italics="true" pageId="11" pageNumber="132">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF80FFBFE5237DAC6BBA29B1" box="[586,668,1191,1212]" pageId="11" pageNumber="132" rank="species">
<emphasis id="B9714551FF80FFBFE5237DAC6BBA29B1" bold="true" box="[586,668,1191,1212]" pageId="11" pageNumber="132">sp. nov.</emphasis>
</taxonomicNameLabel>
: A, forked hydrocladial internode showing hydrotheca, nematothecae and apophysis supporting lower-order hydrocladium, and ahydrothecate internode (arrow); B–C, unforked hydrocladial internodes with hydrothecae and nematothecae; D, detail of hydrotheca and nematothecae. Scale bars: 200 µm (A–C), 100 µm (D).
</paragraph>
</caption>
<paragraph id="8BBA9943FF80FFBFE7AE7C236D8D2A51" blockId="11.[151,1436,1319,2028]" pageId="11" pageNumber="132">
From the known Antarctic/sub-Antarctic species of the genus,
<taxonomicName id="4C05E2C0FF80FFBFE4FB7C2C6DF02832" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[914,1238,1319,1343]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF80FFBFE4FB7C2C6DF02832" box="[914,1238,1319,1343]" italics="true" pageId="11" pageNumber="132">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF80FFBFE3B77C2C6C1C284D" box="[1246,1338,1319,1344]" pageId="11" pageNumber="132" rank="species">
<emphasis id="B9714551FF80FFBFE3B77C2C6C1C284D" bold="true" box="[1246,1338,1319,1344]" pageId="11" pageNumber="132">sp. nov.</emphasis>
</taxonomicNameLabel>
is allied with
<taxonomicName id="4C05E2C0FF80FFBFE7B07C406A832869" authority="Soto Angel &amp; Pena Cantero, 2015" authorityName="Soto Angel &amp; Pena Cantero" authorityYear="2015" box="[217,933,1355,1380]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="discovery">
<emphasis id="B9714551FF80FFBFE7B07C4068C4286E" box="[217,482,1355,1379]" italics="true" pageId="11" pageNumber="132">Schizotricha discovery</emphasis>
<bibRefCitation id="EF94E4B2FF80FFBFE69B7C476A832869" box="[498,933,1355,1380]" pageId="11" pageNumber="132" refId="ref8170" refString="Soto Angel, J. J. &amp; Pena Cantero, A. L. (2015) On the benthic hydroids from the Scotia Arc (Southern Ocean): new insights into their biodiversity, ecology and biogeography. Polar Biology, 38, 983 - 1007. https: // doi. org / 10.1007 / s 00300 - 015 - 1660 - 9" type="journal article">Soto Àngel &amp; Peña Cantero, 2015</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="4C05E2C0FF80FFBFE4D37C406CBE2869" authority="Allman, 1883" authorityName="Allman" authorityYear="1883" box="[954,1432,1355,1380]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="multifurcata">
<emphasis id="B9714551FF80FFBFE4D37C406DC7286E" box="[954,1249,1355,1379]" italics="true" pageId="11" pageNumber="132">Schizotricha multifurcata</emphasis>
<bibRefCitation id="EF94E4B2FF80FFBFE3987C406CBE2869" box="[1265,1432,1355,1380]" pageId="11" pageNumber="132" refId="ref6062" refString="Allman, G. J. (1883) Report on the Hydroida dredged by H. M. S. Challenger during the years 1873 - 76. I. Plumularidae. Report of the Scientific Results of the Foyage of H. M. S. Challenger 1873 - 1876, 1 - 55, pls 1 - 20." type="book chapter">Allman, 1883</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="4C05E2C0FF80FFBFE7FE7C646A1F2885" authority="Pena Cantero, Svoboda &amp; Vervoort, 1996" authorityName="Pena Cantero, Svoboda &amp; Vervoort" authorityYear="1996" box="[151,825,1391,1416]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="nana">
<emphasis id="B9714551FF80FFBFE7FE7C646847288A" box="[151,353,1391,1415]" italics="true" pageId="11" pageNumber="132">Schizotricha nana</emphasis>
Peña Cantero,
<bibRefCitation id="EF94E4B2FF80FFBFE5637C646A1F2885" box="[522,825,1391,1416]" pageId="11" pageNumber="132" refId="ref7481" refString="Pena Cantero, A. L., Svoboda, A. &amp; Vervoort, w. (1996) Species of Schizotricha Allman, 1883 (Cnidaria, Hydrozoa) from recent antarctic expeditions with R. V. '' Polarstern' ', with the description of a new species. Zoologische Mededelingen, Leiden, 70, 411 - 435." type="journal article">Svoboda &amp; Vervoort, 1996</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="4C05E2C0FF80FFBFE42A7C6469F828A1" authority="Pena Cantero &amp; Vervoort, 2004 a" authorityName="Pena Cantero &amp; Vervoort" authorityYear="2004" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="southgeorgiae">
<emphasis id="B9714551FF80FFBFE42A7C646D52288A" box="[835,1140,1391,1415]" italics="true" pageId="11" pageNumber="132">Schizotricha southgeorgiae</emphasis>
Peña
<bibRefCitation id="EF94E4B2FF80FFBFE3DE7C6469F828A1" pageId="11" pageNumber="132" refId="ref7911" refString="Pena Cantero A. L. &amp; Vervoort w. (2004 a) Two new Antarctic species of Schizotricha (Cnidaria: Hydrozoa: Leptothecata) from US Antarctic expeditions. Journal of the Marine Biological Association of the United Kingdom, 84, 29 - 36." type="journal article">Cantero &amp; Vervoort, 2004a</bibRefCitation>
</taxonomicName>
,
<taxonomicName id="4C05E2C0FF80FFBFE7837C986AB328A1" authority="Pena Cantero &amp; Vervoort, 2005" authorityName="Pena Cantero &amp; Vervoort" authorityYear="2005" box="[234,917,1427,1452]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="trinematotheca">
<emphasis id="B9714551FF80FFBFE7837C986B0E28A6" box="[234,552,1427,1451]" italics="true" pageId="11" pageNumber="132">Schizotricha trinematotheca</emphasis>
Peña Cantero &amp; Vervoort, 2005
</taxonomicName>
and
<taxonomicName id="4C05E2C0FF80FFBFE4A47C986C5E28A1" authority="Allman, 1883" authorityName="Allman" authorityYear="1883" box="[973,1400,1427,1452]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="unifurcata">
<emphasis id="B9714551FF80FFBFE4A47C986DF328A6" box="[973,1237,1427,1451]" italics="true" pageId="11" pageNumber="132">Schizotricha unifurcata</emphasis>
<bibRefCitation id="EF94E4B2FF80FFBFE3B47C986C5E28A1" box="[1245,1400,1427,1452]" pageId="11" pageNumber="132" refId="ref6062" refString="Allman, G. J. (1883) Report on the Hydroida dredged by H. M. S. Challenger during the years 1873 - 76. I. Plumularidae. Report of the Scientific Results of the Foyage of H. M. S. Challenger 1873 - 1876, 1 - 55, pls 1 - 20." type="book chapter">Allman, 1883</bibRefCitation>
</taxonomicName>
by the presence of ahydrothecate internodes, but differs from all of them by several important features.
<taxonomicName id="4C05E2C0FF80FFBFE2797CBC69E928FE" authorityName="Pena Cantero, Svoboda &amp; Vervoort" authorityYear="1996" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="nana">
<emphasis id="B9714551FF80FFBFE2797CBC69E928FE" italics="true" pageId="11" pageNumber="132">Schizotricha nana</emphasis>
</taxonomicName>
has the closest nematotheca sets, but it is easily distinguishable by having branched stems, hydrocladia up to second order and, particularly, low hydrothecae.
<taxonomicName id="4C05E2C0FF80FFBFE5A97CF46AFB2B1A" authorityName="Allman" authorityYear="1883" box="[704,989,1535,1559]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="multifurcata">
<emphasis id="B9714551FF80FFBFE5A97CF46AFB2B1A" box="[704,989,1535,1559]" italics="true" pageId="11" pageNumber="132">Schizotricha multifurcata</emphasis>
</taxonomicName>
and
<taxonomicName id="4C05E2C0FF80FFBFE37F7CF46D8E2B1A" authorityName="Allman" authorityYear="1883" box="[1046,1192,1535,1559]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="unifurcata">
<emphasis id="B9714551FF80FFBFE37F7CF46D8E2B1A" box="[1046,1192,1535,1559]" italics="true" pageId="11" pageNumber="132">S. unifurcata</emphasis>
</taxonomicName>
differ, amongst other things, by having branched stems, two nematothecae on the ahydrothecate internodes and a much higher number of infrathecal nematothecae on the cauline and forked hydrocladial internodes.
<taxonomicName id="4C05E2C0FF80FFBFE30A7F4C6C4B2B52" authorityName="Soto Angel &amp; Pena Cantero" authorityYear="2015" box="[1123,1389,1607,1631]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="discovery">
<emphasis id="B9714551FF80FFBFE30A7F4C6C4B2B52" box="[1123,1389,1607,1631]" italics="true" pageId="11" pageNumber="132">Schizotricha discovery</emphasis>
</taxonomicName>
,
<taxonomicName id="4C05E2C0FF80FFBFE2EE7F4C68102B8E" authorityName="Pena Cantero &amp; Vervoort" authorityYear="2004" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="southgeorgiae">
<emphasis id="B9714551FF80FFBFE2EE7F4C68102B8E" italics="true" pageId="11" pageNumber="132">S. southgeorgiae</emphasis>
</taxonomicName>
and
<taxonomicName id="4C05E2C0FF80FFBFE6027F676B1A2B8E" box="[363,572,1643,1667]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="trinematothecae">
<emphasis id="B9714551FF80FFBFE6027F676B1A2B8E" box="[363,572,1643,1667]" italics="true" pageId="11" pageNumber="132">S. trinematothecae</emphasis>
</taxonomicName>
all have unbranched stems. However,
<taxonomicName id="4C05E2C0FF80FFBFE4807F676D882B8E" authorityName="Pena Cantero &amp; Vervoort" authorityYear="2005" box="[1001,1198,1643,1667]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="trinematotheca">
<emphasis id="B9714551FF80FFBFE4807F676D882B8E" box="[1001,1198,1643,1667]" italics="true" pageId="11" pageNumber="132">S. trinematotheca</emphasis>
</taxonomicName>
differs in having two to four nematothecae on the ahydrothecate internodes and a much higher number of nematothecae everywhere, even having suprathecal nematothecae.
<taxonomicName id="4C05E2C0FF80FFBFE5347FB86A7B2BC6" authorityName="Soto Angel &amp; Pena Cantero" authorityYear="2015" box="[605,861,1715,1739]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="discovery">
<emphasis id="B9714551FF80FFBFE5347FB86A7B2BC6" box="[605,861,1715,1739]" italics="true" pageId="11" pageNumber="132">Schizotricha discovery</emphasis>
</taxonomicName>
differs in having one or two nematothecae on the ahydrothecate internode, one or two infrathecal nematothecae on the hydrocladial internodes and, particularly, in having four to five infrathecal nematothecae on the cauline internodes. Finally,
<taxonomicName id="4C05E2C0FF80FFBFE3747FF76DFF2A1E" authorityName="Pena Cantero &amp; Vervoort" authorityYear="2004" box="[1053,1241,1787,1811]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="southgeorgiae">
<emphasis id="B9714551FF80FFBFE3747FF76DFF2A1E" box="[1053,1241,1787,1811]" italics="true" pageId="11" pageNumber="132">S. southgeorgiae</emphasis>
</taxonomicName>
differs in having two infrathecal nematothecae on the forked hydrocladial internodes, two to five infrathecal nematothecae on the cauline internodes and the complete absence of nematothecae on the hydrocladial apophyses.
</paragraph>
</subSubSection>
<subSubSection id="C31FCAC8FF80FFBFE7AE7E6C6BB82AA9" pageId="11" pageNumber="132" type="etymology">
<paragraph id="8BBA9943FF80FFBFE7AE7E6C6BB82AA9" blockId="11.[151,1436,1319,2028]" pageId="11" pageNumber="132">
<emphasis id="B9714551FF80FFBFE7AE7E6C68682A8D" bold="true" box="[199,334,1895,1920]" pageId="11" pageNumber="132">Etymology.</emphasis>
The specific name
<taxonomicName id="4C05E2C0FF80FFBFE5587E6C6BC62A72" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[561,736,1895,1919]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="auroraaustralis">
<emphasis id="B9714551FF80FFBFE5587E6C6BC62A72" box="[561,736,1895,1919]" italics="true" pageId="11" pageNumber="132">auroraaustralis</emphasis>
</taxonomicName>
honors to the research vessel
<taxonomicName id="4C05E2C0FF80FFBFE3547E6C6DDD2A72" authority="Australis" authorityName="Australis" box="[1085,1275,1895,1919]" class="Demospongiae" family="Ancorinidae" genus="Aurora" higherTaxonomySource="GBIF" kingdom="Animalia" order="Tetractinellida" pageId="11" pageNumber="132" phylum="Porifera" rank="genus">
<emphasis id="B9714551FF80FFBFE3547E6C6DDD2A72" box="[1085,1275,1895,1919]" italics="true" pageId="11" pageNumber="132">Aurora Australis</emphasis>
</taxonomicName>
, and its crew, with which the material studied was collected.
</paragraph>
</subSubSection>
<subSubSection id="C31FCAC8FF80FFBFE7AE7EA46C732AE1" pageId="11" pageNumber="132" type="biology_ecology">
<paragraph id="8BBA9943FF80FFBFE7AE7EA46C732AE1" blockId="11.[151,1436,1319,2028]" pageId="11" pageNumber="132">
<materialsCitation id="3B6D931EFF80FFBFE7AE7EA46C732AE1" ID-GBIF-Occurrence="1851456750" country="Antarctica" elevation="433" location="Antarctica" pageId="11" pageNumber="132" specimenCount="1">
<emphasis id="B9714551FF80FFBFE7AE7EA46B262AC5" bold="true" box="[199,512,1967,1992]" pageId="11" pageNumber="132">Ecology and distribution.</emphasis>
The material of
<taxonomicName id="4C05E2C0FF80FFBFE5A47EA46D322ACA" authority="Peña Cantero &amp; Marzal, 2018" authorityName="Peña Cantero &amp; Marzal" authorityYear="2018" box="[717,1044,1967,1991]" class="Hydrozoa" family="Halopterididae" genus="Schizotricha" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptothecata" pageId="11" pageNumber="132" phylum="Cnidaria" rank="species" species="auroraaustralis" status="sp. nov.">
<emphasis id="B9714551FF80FFBFE5A47EA46D322ACA" box="[717,1044,1967,1991]" italics="true" pageId="11" pageNumber="132">Schizotricha auroraaustralis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A242F82AFF80FFBFE3497EA46D582AC5" box="[1056,1150,1967,1992]" pageId="11" pageNumber="132" rank="species">
<emphasis id="B9714551FF80FFBFE3497EA46D582AC5" bold="true" box="[1056,1150,1967,1992]" pageId="11" pageNumber="132">sp. nov.</emphasis>
</taxonomicNameLabel>
was collected at depths between 423 and
<elevation id="00287E70FF80FFBFE6357EDF68832AE6" box="[348,421,2004,2028]" metricMagnitude="2" metricUnit="m" metricValue="4.33" pageId="11" pageNumber="132" unit="m" value="433.0">
<quantity id="4CFD34A6FF80FFBFE6357EDF68832AE6" box="[348,421,2004,2028]" metricMagnitude="2" metricUnit="m" metricValue="4.33" pageId="11" pageNumber="132" unit="m" value="433.0">433 m</quantity>
</elevation>
, with gonothecae in January. It is tentatively considered endemic to East
<collectingCountry id="F312D9D3FF80FFBFE3B07ED86C772AE1" box="[1241,1361,2003,2028]" name="Antarctica" pageId="11" pageNumber="132">Antarctica</collectingCountry>
.
</materialsCitation>
</paragraph>
</subSubSection>
</treatment>
</document>
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