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<document id="63CE299D864B546328D2DF7BBF203692" ID-DOI="10.24199/j.mmv.2003.60.18" ID-ISSN="1447-2554" ID-Zenodo-Dep="12207807" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1718988095639" checkinUser="felipe" docAuthor="Watson, Jeanette W." docDate="2003" docId="039F8846FFC6FF902B55FDC9FF15F8E6" docLanguage="en" docName="MemMusVictoria.60.2.151-180.pdf" docOrigin="Memoirs of Museum Victoria 60 (2)" docSource="https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-60-issue-2-2003/pages-151-180/" docStyle="DocumentStyle:5B3B5C052A93BFEEE334AD6097A94E45.2:MemMusVictoria.2003-.journal_article.type1" docStyleId="5B3B5C052A93BFEEE334AD6097A94E45" docStyleName="MemMusVictoria.2003-.journal_article.type1" docStyleVersion="2" docTitle="Thyroscyphoides sympodialis Watson, 2003, sp. nov." docType="treatment" docVersion="2" lastPageNumber="173" masterDocId="FFA6F03EFFD3FF86287CFFE9FFD0FF9A" masterDocTitle="Deep-water hydroids (Hydrozoa: Leptolida) from Macquarie Island" masterLastPageNumber="180" masterPageNumber="151" pageNumber="172" updateTime="1718989093353" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="0F0C8BA466C0219F47383E823742603E">Deep-water hydroids (Hydrozoa: Leptolida) from Macquarie Island</mods:title>
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<mods:namePart id="7130D87C873EE19A114B66FEDA9A868E">Watson, Jeanette W.</mods:namePart>
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<treatment id="039F8846FFC6FF902B55FDC9FF15F8E6" LSID="urn:lsid:plazi:treatment:039F8846FFC6FF902B55FDC9FF15F8E6" httpUri="http://treatment.plazi.org/id/039F8846FFC6FF902B55FDC9FF15F8E6" lastPageId="22" lastPageNumber="173" pageId="21" pageNumber="172">
<subSubSection id="C32C6ADBFFC6FF932B55FDC9FB61FDAC" box="[809,1201,544,566]" pageId="21" pageNumber="172" type="nomenclature">
<paragraph id="8B893950FFC6FF932B55FDC9FB61FDAC" blockId="21.[809,1201,544,566]" box="[809,1201,544,566]" pageId="21" pageNumber="172">
<heading id="D0C18E3CFFC6FF932B55FDC9FB61FDAC" box="[809,1201,544,566]" fontSize="9" level="2" pageId="21" pageNumber="172" reason="5">
<taxonomicName id="4C3642D3FFC6FF932B55FDC9FB8AFDAC" ID-CoL="56T4X" authorityName="Watson" authorityYear="2003" box="[809,1114,544,566]" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="21" pageNumber="172" phylum="Cnidaria" rank="species" species="sympodialis" status="sp. nov.">
<emphasis id="B942E542FFC6FF932B55FDC9FB8AFDAC" bold="true" box="[809,1114,544,566]" italics="true" pageId="21" pageNumber="172">Thyroscyphoides sympodialis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A2715839FFC6FF932C1DFDC9FB61FDAC" box="[1121,1201,544,566]" pageId="21" pageNumber="172" rank="species">sp. nov.</taxonomicNameLabel>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C32C6ADBFFC6FF902B55FDA0FF15F8E6" lastPageId="22" lastPageNumber="173" pageId="21" pageNumber="172" type="description">
<paragraph id="8B893950FFC6FF932B55FDA0FC17FDC5" blockId="21.[809,967,585,607]" box="[809,967,585,607]" pageId="21" pageNumber="172">
<figureCitation id="130D25D5FFC6FF932B55FDA0FC17FDC5" box="[809,967,585,607]" captionStart="Figures 22" captionStartId="22.[139,208,1343,1363]" captionTargetBox="[251,650,222,1323]" captionTargetId="figure-302@22.[230,672,220,1324]" captionTargetPageId="22" captionText="Figures 22AD. Thyroscyphoides sympodialis sp. nov., stn 44. A, single stem from colony. B, sessile hydrotheca, C, pedicellate hydrotheca. D, anterior view of hydrothecal operculum. Scale bar: A, 1 mm; B, C, D, 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.12207861" httpUri="https://zenodo.org/record/12207861/files/figure.png" pageId="21" pageNumber="172">Figures 22AD</figureCitation>
</paragraph>
<paragraph id="8B893950FFC6FF932B55FD9AFA89FD27" blockId="21.[809,1449,627,701]" pageId="21" pageNumber="172">
<emphasis id="B942E542FFC6FF932B55FD9AFC0EFD1D" box="[809,990,627,647]" italics="true" pageId="21" pageNumber="172">Material examined.</emphasis>
<materialsCitation id="3B5E330DFFC6FF932B99FD9AFA83FD27" collectionCode="NMV" pageId="21" pageNumber="172" specimenCode="F91330, F91350" specimenCount="2" typeStatus="holotype">
Stn 44,
<collectionCode id="ED27A195FFC6FF932C4CFD9AFBB5FD1D" box="[1072,1125,627,647]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34978" lsid="urn:lsid:biocol.org:col:34978" name="Museum Victoria" pageId="21" pageNumber="172" type="Museum">NMV</collectionCode>
<specimenCode id="DB90912BFFC6FF932C11FD9AFB65FD1D" box="[1133,1205,627,647]" collectionCode="NMV" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34978" lsid="urn:lsid:biocol.org:col:34978" name="Museum Victoria" pageId="21" pageNumber="172" type="Museum">F91330</specimenCode>
,
<typeStatus id="548D87F2FFC6FF932CBCFD9AFAC2FD1D" box="[1216,1298,627,647]" pageId="21" pageNumber="172" type="holotype">holotype</typeStatus>
, specimen alcohol-preserved,
<collectionCode id="ED27A195FFC6FF932BCDFD67FC36FD38" box="[945,998,654,674]" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34978" lsid="urn:lsid:biocol.org:col:34978" name="Museum Victoria" pageId="21" pageNumber="172" type="Museum">NMV</collectionCode>
<specimenCode id="DB90912BFFC6FF932B90FD67FBE4FD38" box="[1004,1076,654,674]" collectionCode="NMV" country="Australia" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34978" lsid="urn:lsid:biocol.org:col:34978" name="Museum Victoria" pageId="21" pageNumber="172" type="Museum">F91350</specimenCode>
, malinol-mounted microslide from
<typeStatus id="548D87F2FFC6FF932D05FD67FC80FD27" pageId="21" pageNumber="172" type="holotype">holotype</typeStatus>
colony; 20 infertile stems on hydrorhiza of
<taxonomicName id="4C3642D3FFC6FF932C9FFD40FA83FD27" authorityName="Ehrenberg" authorityYear="1834" box="[1251,1363,681,701]" class="Hydrozoa" family="Eudendriidae" genus="Eudendrium" kingdom="Animalia" order="Anthoathecata" pageId="21" pageNumber="172" phylum="Cnidaria" rank="genus">
<emphasis id="B942E542FFC6FF932C9FFD40FA83FD27" box="[1251,1363,681,701]" italics="true" pageId="21" pageNumber="172">Eudendrium</emphasis>
</taxonomicName>
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.
</paragraph>
<paragraph id="8B893950FFC6FF932B55FD3AFC40FB94" blockId="21.[809,1449,723,1918]" pageId="21" pageNumber="172">
<emphasis id="B942E542FFC6FF932B55FD3AFBE0FD73" box="[809,1072,723,745]" italics="true" pageId="21" pageNumber="172">
Description (of
<typeStatus id="548D87F2FFC6FF932BB5FD3AFBF4FD73" box="[969,1060,723,745]" pageId="21" pageNumber="172" type="holotype">holotype</typeStatus>
).
</emphasis>
Hydrorhiza tubular, rather contorted, reptant on substrate. Stems simple, to
<quantity id="4CCE94B5FFC6FF932CC1FD19FAD7FC9C" box="[1213,1287,752,774]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="21" pageNumber="172" unit="mm" value="12.0">12 mm</quantity>
high, proximal part of stem of same diameter as stolon; basal-most part of stem with 2 to 4 broad, indefinite annulations, stem thereafter sympodial, sometimes a side branch given off from lower stem. Internodes long, smooth, tubular, becoming shorter along stem, widening distally to below hydrotheca; nodes usually with 1 or 2 deep, oblique constrictions almost parallel with adcauline wall of hydrotheca, a slight tumescence in perisarc above node, sometimes 1 or 2 additional constrictions along internode.
</paragraph>
<paragraph id="8B893950FFC6FF932B35FBFCFAE2FA79" blockId="21.[809,1449,723,1918]" pageId="21" pageNumber="172">Hydrothecae alternate, arising just below node, body tubular, wide, most sessile but some pedicellate; in sessile hydrothecae abcauline wall smoothly contiguous with outward bend of internode, free adcauline wall smooth, weakly convex to almost straight, a short length of wall adnate to internode; floor of hydrotheca flat, saucer-shaped or funnel-shaped (depending upon angle of view), hydropore slightly offset, fairly wide, a row of desmocytes above marking place of attachment of hydranth. Pedicellate hydrothecae arising from floor of a broken hydrotheca; pedicels of variable length, smooth to corrugated with some internal thickenings; floor of hydrothecae rounded to sinusoidal. In both forms, hydrothecal margin almost circular (anterior view) with 4 sharply pointed triangular cusps separated by deep embayments; operculum of 4 thin pyramidal valves. Hydranth without diverticulum, but with a distinct annular fold; hydranth with c. 20 tentacles.</paragraph>
<paragraph id="8B893950FFC6FF932B35FA02FBE8F9A1" blockId="21.[809,1449,723,1918]" pageId="21" pageNumber="172">Perisarc of lower stems comparatively thick, thinning apically along internodes, hydrothecal margin and operculum extremely thin and fragile.</paragraph>
<paragraph id="8B893950FFC6FF932B35F9AAFB57F9C3" blockId="21.[809,1449,723,1918]" box="[841,1159,1603,1625]" pageId="21" pageNumber="172">
<emphasis id="B942E542FFC6FF932B35F9AAFC45F9C3" box="[841,917,1603,1625]" italics="true" pageId="21" pageNumber="172">Colour.</emphasis>
Transparent, colourless
</paragraph>
<paragraph id="8B893950FFC6FF932B38F9B6FC2BF9E9" blockId="21.[809,1449,723,1918]" box="[836,1019,1631,1651]" pageId="21" pageNumber="172">
<emphasis id="B942E542FFC6FF932B38F9B6FC17F9E9" box="[836,967,1631,1651]" italics="true" pageId="21" pageNumber="172">Measurements</emphasis>
(µm)
</paragraph>
<paragraph id="8B893950FFC6FF932B55F993FA71F933" blockId="21.[809,1449,723,1918]" pageId="21" pageNumber="172">Stem internode length 10001640</paragraph>
<paragraph id="8B893950FFC6FF932B3FF946FA71F963" blockId="21.[809,1449,723,1918]" pageId="21" pageNumber="172">diameter at node 8096 Hydrotheca length of adnate adcauline wall 168200</paragraph>
<paragraph id="8B893950FFC6FF932B3FF916FA71F889" blockId="21.[809,1449,723,1918]" box="[835,1441,1791,1811]" pageId="21" pageNumber="172">length of free adcauline wall 480584</paragraph>
<paragraph id="8B893950FFC6FF932B3FF8F3FA71F8B4" blockId="21.[809,1449,723,1918]" box="[835,1441,1818,1838]" pageId="21" pageNumber="172">length of abcauline wall (to marginal embayment) 336520</paragraph>
<paragraph id="8B893950FFC6FF932B3FF8DCFA71F8D3" blockId="21.[809,1449,723,1918]" box="[835,1441,1845,1865]" pageId="21" pageNumber="172">width at margin 248296</paragraph>
<paragraph id="8B893950FFC6FF932B3FF8A6FA70F8F9" blockId="21.[809,1449,723,1918]" box="[835,1440,1871,1891]" pageId="21" pageNumber="172">height of marginal cusps 120184</paragraph>
<paragraph id="8B893950FFC6FF902B3FF883FEE9F9A0" blockId="21.[809,1449,723,1918]" lastBlockId="22.[139,780,1513,1594]" lastPageId="22" lastPageNumber="173" pageId="21" pageNumber="172">
width of floor 120136
<emphasis id="B942E542FFC5FF9028F7FA00FEDEFA65" box="[139,270,1513,1535]" italics="true" pageId="22" pageNumber="173">Distribution.</emphasis>
This is the second record of the genus.
<taxonomicName id="4C3642D3FFC5FF902AE2FA00FCDBFA65" authorityName="Naumov" authorityYear="1955" box="[670,779,1513,1535]" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="species" species="biformis">
<emphasis id="B942E542FFC5FF902AE2FA00FCDBFA65" box="[670,779,1513,1535]" italics="true" pageId="22" pageNumber="173">T. biformis</emphasis>
</taxonomicName>
is known from deep water in the northern Pacific Kurile Islands (
<bibRefCitation id="EFA744A1FFC5FF9028EEF9CDFEFDF9A0" author="Naumov, D. V." box="[146,301,1572,1594]" pageId="22" pageNumber="173" pagination="19 - 25" refId="ref26620" refString="Naumov, D. V. 1955. New genera and species of the Hydroidea from the far eastern seas. Trudy Zoologischeskogo, Instituta 18: 19 - 25 (in Russian)." type="journal article" year="1955">Naumov, 1955</bibRefCitation>
).
</paragraph>
<caption id="DF4969D8FFC5FF9028F7FAD6FE58FA39" ID-DOI="http://doi.org/10.5281/zenodo.12207861" ID-Zenodo-Dep="12207861" httpUri="https://zenodo.org/record/12207861/files/figure.png" pageId="22" pageNumber="173" startId="22.[139,208,1343,1363]" targetBox="[251,650,222,1323]" targetPageId="22" targetType="figure">
<paragraph id="8B893950FFC5FF9028F7FAD6FE58FA39" blockId="22.[139,778,1343,1443]" pageId="22" pageNumber="173">
Figures 22AD.
<taxonomicName id="4C3642D3FFC5FF90294BFAD6FD81FAC9" authorityName="Watson" authorityYear="2003" box="[311,593,1343,1363]" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="species" species="sympodialis" status="sp. nov.">
<emphasis id="B942E542FFC5FF90294BFAD6FD81FAC9" box="[311,593,1343,1363]" italics="true" pageId="22" pageNumber="173">Thyroscyphoides sympodialis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A2715839FFC5FF902A23FAD6FD61FAC9" box="[607,689,1343,1363]" pageId="22" pageNumber="173" rank="species">sp. nov.</taxonomicNameLabel>
, stn 44. A, single stem from colony. B, sessile hydrotheca, C, pedicellate hydrotheca. D, anterior view of hydrothecal operculum. Scale bar: A, 1 mm; B, C, D, 0.5 mm.
</paragraph>
</caption>
<caption id="DF4969D8FFC5FF902B3EFA9DFA71FA27" ID-DOI="http://doi.org/10.5281/zenodo.12207863" ID-Zenodo-Dep="12207863" httpUri="https://zenodo.org/record/12207863/files/figure.png" pageId="22" pageNumber="173" startId="22.[834,903,1396,1416]" targetBox="[822,1457,864,1374]" targetPageId="22" targetType="figure">
<paragraph id="8B893950FFC5FF902B3EFA9DFA71FA27" blockId="22.[820,1458,1396,1469]" pageId="22" pageNumber="173">
Figures 23AC.
<taxonomicName id="4C3642D3FFC5FF902B90FA9DFB07FA12" box="[1004,1239,1396,1416]" class="Hydrozoa" family="Aglaopheniidae" genus="Gymnangium" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="species" species="japonicum">
<emphasis id="B942E542FFC5FF902B90FA9DFB07FA12" box="[1004,1239,1396,1416]" italics="true" pageId="22" pageNumber="173">Gymnangium japonicum</emphasis>
</taxonomicName>
, stn 122. A, colony. B, hydrocladial hydrothecae. C, cauline internodes with tubular nematocysts (after
<bibRefCitation id="EFA744A1FFC5FF902BCCFA40FB77FA27" author="Watson, J. E. &amp; Vervoort, W." box="[944,1191,1449,1469]" pageId="22" pageNumber="173" pagination="1 - 37" refId="ref29834" refString="Watson, J. E., and Vervoort, W. 2001. The hydroid fauna of Tasmanian seamounts. Zoologische Verhandlingen, Leiden 333: 1 - 37." type="journal article" year="2001">Watson and Vervoort 2001</bibRefCitation>
). A, 20 mm; B, C, 0.5 mm.
</paragraph>
</caption>
<paragraph id="8B893950FFC5FF9028F7F9B9FD42F9FC" blockId="22.[139,658,1616,1638]" box="[139,658,1616,1638]" pageId="22" pageNumber="173">
<emphasis id="B942E542FFC5FF9028F7F9B9FF2EF9FC" box="[139,254,1616,1638]" italics="true" pageId="22" pageNumber="173">Etymology.</emphasis>
Refers to the strongly sympodial habit.
</paragraph>
<paragraph id="8B893950FFC5FF9028F7F995FDA5F956" blockId="22.[139,780,1660,1916]" pageId="22" pageNumber="173">
<emphasis id="B942E542FFC5FF9028F7F995FF3BF908" box="[139,235,1660,1682]" italics="true" pageId="22" pageNumber="173">Remarks.</emphasis>
The colonies are almost flaccid out of fluid and the thin, almost transparent perisarc of the hydrothecal margin and operculae are so crushed that few remain intact.
</paragraph>
<paragraph id="8B893950FFC5FF9028D7F93DFF15F8E6" blockId="22.[139,780,1660,1916]" pageId="22" pageNumber="173">
Sessile and pedicellate hydrothecae on the same stem and a hydranth lacking a diverticulum places the species in
<taxonomicName id="4C3642D3FFC5FF9028F7F8E6FE04F8BE" authority="Naumov, 1955" authorityName="Naumov" authorityYear="1955" box="[139,468,1806,1829]" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="genus">
<emphasis id="B942E542FFC5FF9028F7F8E6FEE6F8BF" box="[139,310,1807,1829]" italics="true" pageId="22" pageNumber="173">Thyroscyphoides</emphasis>
<bibRefCitation id="EFA744A1FFC5FF902940F8E7FE04F8BE" author="Naumov, D. V." box="[316,468,1806,1828]" pageId="22" pageNumber="173" pagination="19 - 25" refId="ref26620" refString="Naumov, D. V. 1955. New genera and species of the Hydroidea from the far eastern seas. Trudy Zoologischeskogo, Instituta 18: 19 - 25 (in Russian)." type="journal article" year="1955">Naumov, 1955</bibRefCitation>
</taxonomicName>
. The only other known species of the genus,
<taxonomicName id="4C3642D3FFC5FF902968F8C5FDCFF8D8" authority="Naumov, 1955" authorityName="Naumov" authorityYear="1955" box="[276,543,1836,1858]" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="species" species="biformis">
<emphasis id="B942E542FFC5FF902968F8C5FE51F8D8" box="[276,385,1836,1858]" italics="true" pageId="22" pageNumber="173">T. biformis</emphasis>
<bibRefCitation id="EFA744A1FFC5FF9029F4F8C5FDCFF8D8" author="Naumov, D. V." box="[392,543,1836,1858]" pageId="22" pageNumber="173" pagination="19 - 25" refId="ref26620" refString="Naumov, D. V. 1955. New genera and species of the Hydroidea from the far eastern seas. Trudy Zoologischeskogo, Instituta 18: 19 - 25 (in Russian)." type="journal article" year="1955">Naumov, 1955</bibRefCitation>
</taxonomicName>
, differs from
<taxonomicName id="4C3642D3FFC5FF902AD5F8C5FF13F8C5" authorityName="Watson" authorityYear="2003" class="Hydrozoa" family="Thyroscyphidae" genus="Thyroscyphoides" kingdom="Animalia" order="Leptothecata" pageId="22" pageNumber="173" phylum="Cnidaria" rank="species" species="sympodialis">
<emphasis id="B942E542FFC5FF902AD5F8C5FF13F8C5" italics="true" pageId="22" pageNumber="173">T. sympodialis</emphasis>
</taxonomicName>
in its alternate hydrothecae and its strongly sympodial habit.
</paragraph>
</subSubSection>
</treatment>
</document>