148 lines
15 KiB
XML
148 lines
15 KiB
XML
<document id="CE2ADDECBD9C9C6A81693EFC40824EF8" ID-CLB-Dataset="35028" ID-DOI="http://dx.doi.org/10.3897/zse.91.5417" ID-GBIF-Dataset="41668aff-331c-4bf3-b7fe-f89aacd4cd60" ID-Pensoft-Pub="1860-0743-2-151" ID-ZooBank="D2E0E6B8EFAB4D2593E664B9C212679D" ModsDocAuthor="" ModsDocDate="2015" ModsDocID="1860-0743-2-151" ModsDocOrigin="Zoosystematics and Evolution 91 (2)" ModsDocTitle="Description and morphology of the “Juan de Fuca vent mussel”, Benthomodioluserebus sp. n. (Bivalvia, Mytilidae, Bathymodiolinae): “Phylogenetically basal but morphologically advanced”" checkinTime="1439308598859" checkinUser="pensoft" docAuthor="Oliver, P. Graham" docDate="2015" docId="0793019FADD5BD27F0CCD9D23E24422D" docLanguage="en" docName="ZoosystEvol 91(2): 151-165" docOrigin="Zoosystematics and Evolution 91 (2)" docSource="http://dx.doi.org/10.3897/zse.91.5417" docTitle="Benthomodiolus geikotsucola Okutani & Miyazaki 2007" docType="treatment" docVersion="6" lastPageNumber="158" masterDocId="FFE55001A47B64728B74FFD9FFE28A2D" masterDocTitle="Description and morphology of the " Juan de Fuca vent mussel ", Benthomodioluserebus sp. n. (Bivalvia, Mytilidae, Bathymodiolinae): " Phylogenetically basal but morphologically advanced "" masterLastPageNumber="165" masterPageNumber="151" pageNumber="156" updateTime="1701382628324" updateUser="ExternalLinkService">
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<mods:title id="CF5E25F8F02F5ECC86B19826B3A6F51E">Description and morphology of the " Juan de Fuca vent mussel ", Benthomodioluserebus sp. n. (Bivalvia, Mytilidae, Bathymodiolinae): " Phylogenetically basal but morphologically advanced "</mods:title>
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<mods:namePart id="9FBE40B939ABAC53A2ABC799FC364FB8">Oliver, P. Graham</mods:namePart>
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<mods:typeOfResource id="B50A054C8746BE67562B75B303F6860E">text</mods:typeOfResource>
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<mods:title id="7D3E5F7FC9822B0FC1735974EF9FE84B">Zoosystematics and Evolution</mods:title>
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<mods:part id="F44B2ADB0127BC8B1DF6005D6FEC9DD8">
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<mods:date id="8E208EBC55CA91A39A682911A2769C7B">2015</mods:date>
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<mods:number id="96D0D02C54C775CDC769423D956601E8">91</mods:number>
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<mods:start id="D687ADAA18A33396DED344463BCBDC6C">151</mods:start>
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<mods:url id="C29EA589480B39182957FA3D2E8622E0">http://dx.doi.org/10.3897/zse.91.5417</mods:url>
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<mods:classification id="754AAEBD625ACC8454B4A11B3DEC9D01">journal article</mods:classification>
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<mods:identifier id="CB846F89ACC3A51EFCEE5F3874E37BE3" type="DOI">http://dx.doi.org/10.3897/zse.91.5417</mods:identifier>
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<mods:identifier id="6A375E51C99C5AD4250F7C43C68ED577" type="Pensoft-Pub">1860-0743-2-151</mods:identifier>
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<treatment id="0793019FADD5BD27F0CCD9D23E24422D" ID-GBIF-Taxon="127875663" LSID="urn:lsid:plazi:treatment:0793019FADD5BD27F0CCD9D23E24422D" httpUri="http://treatment.plazi.org/id/0793019FADD5BD27F0CCD9D23E24422D" lastPageId="7" lastPageNumber="158" pageId="5" pageNumber="156">
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<subSubSection id="E0AD46539CF58B9FC50951D3D172159A" pageId="5" pageNumber="156" type="multiple">
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<paragraph id="D0D96B7FFDDF5122CE38192484A2788B" pageId="5" pageNumber="156">
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<pageBreakToken id="0BE05774D91799F42242A658986C82E2" pageId="5" pageNumber="156" start="start">Taxon</pageBreakToken>
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classification Animalia Mytiloida Mytilidae
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</paragraph>
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</subSubSection>
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<subSubSection id="6EA1CB8F0D03C858CCD3A9F84D257EEB" pageId="5" pageNumber="156" type="nomenclature">
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<paragraph id="CA83284FBC0456B84922063ED249B742" pageId="5" pageNumber="156">
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<taxonomicName id="346580E33292DC4C7CDDFBDD498EFC40" ID-CoL="LHWB" authority="Okutani & Miyazaki, 2007" authorityName="Okutani & Miyazaki" authorityYear="2007" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus geikotsucola" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="geikotsucola">Benthomodiolus geikotsucola Okutani & Miyazaki, 2007</taxonomicName>
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</paragraph>
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</subSubSection>
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<subSubSection id="B012F9E85D11E4B481F71FA3D995CCF9" pageId="5" pageNumber="156" type="reference_group">
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<paragraph id="17F7C962EB1861AC9F36B9D23682B2D3" pageId="5" pageNumber="156">
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<taxonomicName id="55966F97FD3DD5AA8FC5209063C46EBD" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus geikotsucola" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="geikotsucola">Benthomodiolus geikotsucola</taxonomicName>
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Okutani & Miyazaki, 2007: 49-55, figs 2-3.
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</paragraph>
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</subSubSection>
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<subSubSection id="79A68EF2CF5F45A683E57370A149F818" pageId="5" pageNumber="156" type="materials_examined">
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<paragraph id="3B36622C2DB074976E3AC94180010870" pageId="5" pageNumber="156">Material examined.</paragraph>
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<paragraph id="FB2FD5220079ADE91F6DFBC0459BC53E" pageId="5" pageNumber="156">
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Holotype. 1 shell, NSMT-Mo-76703, Summit of Torishima Seamount,
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<geoCoordinate id="7D53796E6B15861B9CCE4FEAB35F7ECF" direction="north" orientation="latitude" precision="925" value="30.916666">30°55'N</geoCoordinate>
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<geoCoordinate id="AF52BB1DBF62AB11009C627D314C7468" direction="east" orientation="longitude" precision="925" value="141.81667">141°49'E</geoCoordinate>
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, 4020m. Not examined, image courtesy of NSMT.
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</paragraph>
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<paragraph id="4231ACFDCA6CD5DC60BBA39C75AAEEF8" pageId="5" pageNumber="156">Paratype. 1 specimen, NSMT Mo-76704j as holotype.</paragraph>
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</subSubSection>
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<subSubSection id="0F7373C83EFE6B3BDC1D05D40CDD1164" pageId="5" pageNumber="156" type="shell">
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<paragraph id="2727E64A9572208008A451654966664C" pageId="5" pageNumber="156">Shell.</paragraph>
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<paragraph id="EB94E24F65F6B011291C6D9C3018E292" pageId="5" pageNumber="156">
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The holotype (Fig. 6a) is slightly larger than any of the shells of
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<taxonomicName id="BF824ABF10BF45D61B1D5452887499E9" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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reaching 42.5 mm. The paratype dissected here (Fig. 6
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<normalizedToken id="311D20ED8DAD89867BE1553177A7B1B4" originalValue="b–d">b-d</normalizedToken>
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) was 28.1 mm in length. The shell is umbonate, narrowly arcuate in outline and medially sulcate; in these there is strong similarity to
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<taxonomicName id="9B391AB4F1283080BB2CF20140B835EB" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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. The beaks are rather distant from the anterior margin, more so than in B. erebus with a total length /anterior length of 0.28 compared with a value of 0.24 for
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<taxonomicName id="214A2AE7535CAE59D3B9636132E77112" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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. As in
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<taxonomicName id="C050ADF2EEA05AAFCED297452DC2D589" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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the periostracum is smooth and devoid of hairs.
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</paragraph>
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<caption id="942D067FC748EAF703D54FC6773650A5" pageId="5" pageNumber="156">
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<paragraph id="4B9755CD31056E71502AC82A5E738A35" pageId="5" pageNumber="156">
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Figures 6.
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<normalizedToken id="3B4EA7F9A2E8CAFF299199722DA0F31D" originalValue="a–d">a-d</normalizedToken>
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Shells of
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<taxonomicName id="C7FD43483E0B2B21EB495A47F819729E" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus geikotsucola" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="geikotsucola">Benthomodiolus geikotsucola</taxonomicName>
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Okutani and Miyazaki, 2007. a exterior of left valve of holotype (NSMT-Mo-7670349),
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<normalizedToken id="048FBC97950E832267778D44011D2A0C" originalValue="b–d">b-d</normalizedToken>
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of the dissected paratype (NSMT Mo-76704j).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="E2C782986F10C1F48FF78592840FEA4E" pageId="5" pageNumber="156" type="pedal byssus musculature">
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<paragraph id="DA5FC65B38A64AE3D92E8FD55A6D1E14" pageId="5" pageNumber="156">Pedal byssus musculature.</paragraph>
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<paragraph id="588CBE290986FA9582885A1F966ECF61" pageId="5" pageNumber="156">
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The arrangement of the pedal and adductor muscles (Fig. 7
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<normalizedToken id="AFA26DA84D5B8E55C87834818318C52D" originalValue="b–c">b-c</normalizedToken>
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) is almost identical to that in
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<taxonomicName id="341AF4338628A156AE7051630D168997" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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in that the byssal retractors (pbr2 and pbr1) are widely separated with pbr2 attached in the rear of the umbonal cavity. Both the anterior pedal retractor (apr) and posterior byssal retractor (pbr1) are slender. The posterior protractor muscle (ppr) in
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<taxonomicName id="374A1DBAE026CA3304EAAA8E041CFCB8" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus geikotsucola" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="geikotsucola">Benthomodiolus geikotsucola</taxonomicName>
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is very slender and simple and lacking the secondary muscles (sppr) seen in
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<taxonomicName id="CD0406299F6EE20E50BBC8968338C95D" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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.
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</paragraph>
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<caption id="D6DC5296C9D701CAE0B9E43339BBCD90" pageId="5" pageNumber="156">
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<paragraph id="34F88B050EF6796F5D7A9360B1176FF0" pageId="5" pageNumber="156">
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Figure 7. Gross anatomy of
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<taxonomicName id="7036C00D41EC50019995A28D160D1AE7" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus geikotsucola" order="Mytilida" pageId="5" pageNumber="156" phylum="Mollusca" rank="species" species="geikotsucola">Benthomodiolus geikotsucola</taxonomicName>
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stained with methylene green. a after removal of left valve and mantle, b after further removal of the ctenidium, c diagram of the adductor, pedal and byssal musculature.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection id="B4B6949B2C5F7B066434BF4EDFA6CEA1" pageId="6" pageNumber="157" type="ctenidium and labial palps">
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<paragraph id="53B39CD6EA452BDB6AA47DCE82E241A3" pageId="6" pageNumber="157">
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<pageBreakToken id="160F3C7D8ED494B09FE7BB07D22DC360" pageId="6" pageNumber="157" start="start">Ctenidium</pageBreakToken>
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and labial palps.
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</paragraph>
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<paragraph id="A54ADBB9A12F07F5703DEDF63FE9E8B2" pageId="6" pageNumber="157">
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The ctenidium consists of both demibranchs and as in
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<taxonomicName id="2BCEA65F330BA5BB23C31D4163225CB2" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="6" pageNumber="157" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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the filaments are relatively short (Fig. 7a, 4f). The ascending and descending arms of the filaments are fused for over half their lengths and the abfrontal surface is extending creating a triangular laminar form to each filament (Fig. 4g). The filaments have a single row of ciliary junctions on the ascending and descending arms (Fig. 4
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<normalizedToken id="CC25B1DC6EAC6E178160D44778228A19" originalValue="g–h">g-h</normalizedToken>
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). The abfrontal surface is composed of polygonal cushions of microvilli.
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</paragraph>
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</subSubSection>
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<subSubSection id="EE2BEB012EC2D218788BFBF40C3D7503" pageId="7" pageNumber="158" type="mantle edge and apertures">
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<paragraph id="C95E49F5F44985B0B991FE981D3A3563" pageId="7" pageNumber="158">
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<pageBreakToken id="0B48BEB74197B7B91229902637E6FB1A" pageId="7" pageNumber="158" start="start">Mantle</pageBreakToken>
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edge and apertures.
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</paragraph>
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<paragraph id="78185678C74E10387AA104E175380BBA" pageId="7" pageNumber="158">
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The mantle edge is free for most of its length and fused only posteriorly to separate the ventral gape for the exhalant aperture. The entire length of the ventral gape the middle fold is thrown into a dense series of folds (Fig. 7a, mef) and in this unlike the almost lack of folding seen in
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<taxonomicName id="9F53AF578E76BD5387CFF967BCC7EFE6" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="7" pageNumber="158" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="8A06D289A503955F315A4BAECA3A678E" pageId="7" pageNumber="158" type="alimentary system">
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<paragraph id="134AB906C1D66B540E6C0392B5E4A548" pageId="7" pageNumber="158">Alimentary system.</paragraph>
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<paragraph id="3B8D61BE6AE14577DFEF18D3C0DB452A" pageId="7" pageNumber="158">
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The stomach was not dissected. The gut follows a similar path to that in
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<taxonomicName id="92963389D5BF7578A85C8F1E347EC53C" class="Bivalvia" family="Mytilidae" genus="Benthomodiolus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Benthomodiolus erebus" order="Mytilida" pageId="7" pageNumber="158" phylum="Mollusca" rank="species" species="erebus">Benthomodiolus erebus</taxonomicName>
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but the hindgut loop is distinct with a short reversed portion (Fig. 7b, hgl).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |