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<document id="A8F34A8CD62D770FF1F600A2A38D53C6" ID-ISBN="978-2-85653-614-8" ID-ISSN="1243-4442" IM.materialsCitations_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1630456027313" checkinUser="felipe" docAuthor="Valdés, Ángel" docDate="2008" docId="03D087B2FF5ABE91FF017766F5E0FBD0" docLanguage="en" docName="09-Valdés.pdf" docOrigin="Mémoires du Muséum national d'Histoire naturelle 196" docStyle="DocumentStyle:18F5342D935943D6DB33581BB9A2E502.4:MemMusNatHistNatu.2010-.journal_article" docStyleId="18F5342D935943D6DB33581BB9A2E502" docStyleName="MemMusNatHistNatu.2010-.journal_article" docStyleVersion="4" docTitle="Gastropteron bicornutum Baba &amp; Tokioka 1965" docType="treatment" docVersion="2" lastPageNumber="778" masterDocId="FFE9FFCAFFE4BE2EFFF3766FF729FFE3" masterDocTitle="Deep-sea “ cephalaspidean ” heterobranchs (Gastropoda) from the tropical southwest Pacific" masterLastPageNumber="792" masterPageNumber="587" pageNumber="777" updateTime="1699277432387" updateUser="plazi" zenodo-license-document="CLOSED">
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<mods:title id="F92B470756795373360088BA09520166">Deep-sea “ cephalaspidean ” heterobranchs (Gastropoda) from the tropical southwest Pacific</mods:title>
</mods:titleInfo>
<mods:name id="B549C9E839BE42BFA40F08BDD847D5BC" type="personal">
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</mods:role>
<mods:namePart id="74B64BE3E4DB25635E8F258D8C30AFC8">Valdés, Ángel</mods:namePart>
<mods:affiliation id="4F1B663313C5A7B63BD65DAC44202CA9">John T. Huber</mods:affiliation>
</mods:name>
<mods:typeOfResource id="592E80715631249C875423174E0CB107">text</mods:typeOfResource>
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<mods:title id="578D3081D7E6B443FC0F8678C905A8C7">Mémoires du Muséum national d'Histoire naturelle</mods:title>
</mods:titleInfo>
<mods:part id="C7E5D33B714FD19CD2421309C6ED9BD4">
<mods:date id="CF7A4910978331E16FE2FF1D933A368E">2008</mods:date>
<mods:detail id="D010C2721340135AF01A5C7C41226503" type="volume">
<mods:number id="5265A8777BDFEB610850199C441A0184">196</mods:number>
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<mods:start id="24E6D89D91ADC1E2B5238B65E6B4589E">587</mods:start>
<mods:end id="B8BE77A445270FCCA7E4148257F2ECCB">792</mods:end>
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<mods:classification id="E68C3FA440DBA8A12BA5DC035A28CE0B">journal article</mods:classification>
<mods:identifier id="F08F0371CC6105837C5B1BC8E435D30D" type="ISBN">978-2-85653-614-8</mods:identifier>
<mods:identifier id="55A193E92BC7416EAA74265CE1D7E3AD" type="ISSN">1243-4442</mods:identifier>
</mods:mods>
<treatment id="03D087B2FF5ABE91FF017766F5E0FBD0" LSID="urn:lsid:plazi:treatment:03D087B2FF5ABE91FF017766F5E0FBD0" httpUri="http://treatment.plazi.org/id/03D087B2FF5ABE91FF017766F5E0FBD0" lastPageId="191" lastPageNumber="778" pageId="190" pageNumber="777">
<subSubSection id="C363652FFF5ABE90FF017766F693FEA6" pageId="190" pageNumber="777" type="nomenclature">
<paragraph id="8BC636A4FF5ABE90FF017766F430FEC2" blockId="190.[212,793,265,325]" box="[242,793,265,290]" pageId="190" pageNumber="777">
<heading id="D08E81C8FF5ABE90FF017766F430FEC2" box="[242,793,265,290]" fontSize="10" level="2" pageId="190" pageNumber="777" reason="2">
<taxonomicName id="4C794D27FF5ABE90FF017766F430FEC2" ID-CoL="3FDXP" authority="Baba &amp; Tokioka, 1965" authorityName="Baba &amp; Tokioka" authorityYear="1965" box="[242,793,265,290]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="190" pageNumber="777" phylum="Mollusca" rank="species" species="bicornutum">
<emphasis id="B90DEAB6FF5ABE90FF017766F50BFEC3" bold="true" box="[242,546,265,288]" italics="true" pageId="190" pageNumber="777">Gastropteron bicornutum</emphasis>
<bibRefCitation id="EFE84B55FF5ABE90FDDB7766F430FEC2" author="BABA K. &amp; TOKIOKA T." box="[552,793,265,290]" pageId="190" pageNumber="777" refId="ref123869" refString="BABA K. &amp; TOKIOKA T. 1965. - Two more new species of Gastropteron from [Tectibranchia, Nucleobranchiata, Pulmonata (Thalassophila) et Annexe]." type="book" year="1965">Baba &amp; Tokioka, 1965</bibRefCitation>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277742F693FEA6" blockId="190.[212,793,265,325]" box="[212,442,300,325]" pageId="190" pageNumber="777">Figs 95C, 97A, 98, 99</paragraph>
</subSubSection>
<subSubSection id="C363652FFF5ABE90FF27771FF4FDFE67" box="[212,980,366,389]" pageId="190" pageNumber="777" type="reference_group">
<paragraph id="8BC636A4FF5ABE90FF27771FF4FDFE67" blockId="190.[212,980,366,389]" box="[212,980,366,389]" pageId="190" pageNumber="777">
<treatmentCitationGroup id="AB69118AFF5ABE90FF27771FF4FDFE67" box="[212,980,366,389]" pageId="190" pageNumber="777">
<treatmentCitation id="0AD810B5FF5ABE90FF27771FF5ECFE67" author="BABA K. &amp; TOKIOKA T." box="[212,709,366,389]" page="364" pageId="190" pageNumber="777" year="1965">
<taxonomicName id="4C794D27FF5ABE90FF27771FF5ECFE67" ID-CoL="3FDXP" authority="Baba &amp; Tokioka, 1965: 364" authorityName="Baba &amp; Tokioka" authorityPageNumber="364" authorityYear="1965" box="[212,709,366,389]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="190" pageNumber="777" phylum="Mollusca" rank="species" species="bicornutum">
<emphasis id="B90DEAB6FF5ABE90FF27771FF69EFE66" box="[212,439,368,389]" italics="true" pageId="190" pageNumber="777">Gastropteron bicornutum</emphasis>
<bibRefCitation id="EFE84B55FF5ABE90FE4E7701F5ECFE67" author="BABA K. &amp; TOKIOKA T." box="[445,709,366,389]" pageId="190" pageNumber="777" refId="ref123869" refString="BABA K. &amp; TOKIOKA T. 1965. - Two more new species of Gastropteron from [Tectibranchia, Nucleobranchiata, Pulmonata (Thalassophila) et Annexe]." type="book" year="1965">Baba &amp; Tokioka, 1965: 364</bibRefCitation>
</taxonomicName>
</treatmentCitation>
, text figs 1-6, pl. 25, figs 1-9.
</treatmentCitationGroup>
</paragraph>
</subSubSection>
<subSubSection id="C363652FFF5ABE90FF2777D7F386FDB7" pageId="190" pageNumber="777" type="materials_examined">
<paragraph id="8BC636A4FF5ABE90FF2777D7F566FE2C" blockId="190.[212,591,439,464]" box="[212,591,439,464]" pageId="190" pageNumber="777">
<materialsCitation id="3B113CF9FF5ABE90FF2777D7F562FE2C" box="[212,587,439,464]" collectionCode="MATERIAL" location="Not" pageId="190" pageNumber="777" specimenCount="1" stateProvince="Uthuru" typeStatus="holotype">
<typeStatus id="54C28806FF5ABE90FF2777D7F639FE2C" box="[212,272,440,463]" pageId="190" pageNumber="777">TYPE</typeStatus>
<collectionCode id="ED68AE61FF5ABE90FEE577D7F6BBFE33" box="[278,402,440,464]" pageId="190" pageNumber="777">MATERIAL</collectionCode>
. —
<collectingRegion id="49BDF846FF5ABE90FE4277D7F6F0FE2C" box="[433,473,440,463]" country="Maldives" name="Uthuru" pageId="190" pageNumber="777">Not</collectingRegion>
examined
</materialsCitation>
.
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277792F5DFFDF7" blockId="190.[212,758,509,533]" box="[212,758,509,533]" pageId="190" pageNumber="777">
<materialsCitation id="3B113CF9FF5ABE90FF277792F5DBFDF7" box="[212,754,509,533]" collectionCode="LOCALITY" country="Japan" location="Tomoika Bay" municipality="Amakusa" pageId="190" pageNumber="777" specimenCount="1" typeStatus="holotype">
<typeStatus id="54C28806FF5ABE90FF277792F639FDF7" box="[212,272,509,532]" pageId="190" pageNumber="777">TYPE</typeStatus>
<collectionCode id="ED68AE61FF5ABE90FEE57792F6B8FDF6" box="[278,401,509,533]" pageId="190" pageNumber="777">LOCALITY</collectionCode>
. —
<location id="8EA6607FFF5ABE90FE437792F512FDF6" LSID="urn:lsid:plazi:treatment:03D087B2FF5ABE91FF017766F5E0FBD0:8EA6607FFF5ABE90FE437792F512FDF6" box="[432,571,509,533]" country="Japan" municipality="Amakusa" name="Tomoika Bay" pageId="190" pageNumber="777">Tomoika Bay</location>
,
<collectingMunicipality id="6BA2ACDEFF5ABE90FDB67792F580FDF6" box="[581,681,509,533]" pageId="190" pageNumber="777">Amakusa</collectingMunicipality>
,
<collectingCountry id="F36E7634FF5ABE90FD407792F5DBFDF7" box="[691,754,509,532]" name="Japan" pageId="190" pageNumber="777">Japan</collectingCountry>
</materialsCitation>
.
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277450F386FDB7" blockId="190.[212,1199,574,596]" box="[212,1199,574,596]" pageId="190" pageNumber="777">
<collectionCode id="ED68AE61FF5ABE90FF277450F669FDB7" box="[212,320,575,596]" pageId="190" pageNumber="777">MATERIAL</collectionCode>
EXAMINED. —
<materialsCitation id="3B113CF9FF5ABE90FE2B7450F382FDB7" box="[472,1195,574,596]" country="Vanuatu" elevation="420" latitude="-20.333334" location="Vanuatu" longLatPrecision="1268" longitude="169.81667" pageId="190" pageNumber="777" specimenCount="1" specimenCount-larva="1">
<emphasis id="B90DEAB6FF5ABE90FE2B7450F505FDB7" bold="true" box="[472,556,575,596]" pageId="190" pageNumber="777">
<collectingCountry id="F36E7634FF5ABE90FE2B7450F505FDB7" box="[472,556,575,596]" name="Vanuatu" pageId="190" pageNumber="777">Vanuatu</collectingCountry>
</emphasis>
. MUSORSTOM 8: stn CP 963,
<geoCoordinate id="EE4D5063FF5ABE90FCA57450F48CFDB7" box="[854,933,575,596]" degrees="20" direction="south" minutes="20" orientation="latitude" pageId="190" pageNumber="777" precision="925" value="-20.333334">20°20’S</geoCoordinate>
,
<geoCoordinate id="EE4D5063FF5ABE90FC5D7451F323FDB7" box="[942,1034,574,596]" degrees="169" direction="east" minutes="49" orientation="longitude" pageId="190" pageNumber="777" precision="925" value="169.81667">169°49’E</geoCoordinate>
,
<quantity id="4C819B41FF5ABE90FBE77450F354FDB7" box="[1044,1149,575,596]" metricMagnitude="2" metricUnit="m" metricValue="4.2" metricValueMax="4.4" metricValueMin="4.0" pageId="190" pageNumber="777" unit="m" value="420.0" valueMax="440.0" valueMin="400.0">
<elevation id="0054D197FF5ABE90FBE77450F354FDB7" box="[1044,1149,575,596]" metricMagnitude="2" metricUnit="m" metricValue="4.2" metricValueMax="4.4" metricValueMin="4.0" pageId="190" pageNumber="777" unit="m" value="420.0" valueMax="440.0" valueMin="400.0">400-440 m</elevation>
</quantity>
,
<specimenCount id="9D7FFD2DFF5ABE90FB747450F382FDB7" box="[1159,1195,574,596]" pageId="190" pageNumber="777" type="larva">1 lv</specimenCount>
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="C363652FFF5ABE90FF2774E8F214FD22" pageId="190" pageNumber="777" type="distribution">
<paragraph id="8BC636A4FF5ABE90FF2774E8F214FD22" blockId="190.[212,1444,647,706]" pageId="190" pageNumber="777">
<materialsCitation id="3B113CF9FF5ABE90FF2774E8F214FD22" collectionCode="DISTRIBUTION" country="Japan" elevation="420" location="Previously" municipality="Material" pageId="190" pageNumber="777" specimenCount="1">
<collectionCode id="ED68AE61FF5ABE90FF2774E8F6AFFD7C" box="[212,390,647,671]" pageId="190" pageNumber="777">DISTRIBUTION</collectionCode>
. —
<location id="8EA6607FFF5ABE90FE5474E8F53CFD7C" LSID="urn:lsid:plazi:treatment:03D087B2FF5ABE91FF017766F5E0FBD0:8EA6607FFF5ABE90FE5474E8F53CFD7C" box="[423,533,647,671]" country="Japan" municipality="Material" name="Previously" pageId="190" pageNumber="777">Previously</location>
recorded from shallow waters of
<collectingCountry id="F36E7634FF5ABE90FC8C74E7F492FD7C" box="[895,955,648,671]" name="Japan" pageId="190" pageNumber="777">Japan</collectingCountry>
and
<collectingCountry id="F36E7634FF5ABE90FC0074E7F3E8FD7C" box="[1011,1217,647,671]" name="Papua New Guinea" pageId="190" pageNumber="777">Papua New Guinea</collectingCountry>
(see Gosliner 1989).
<collectingMunicipality id="6BA2ACDEFF5ABE90FF2774C5F602FD21" box="[212,299,682,706]" pageId="190" pageNumber="777">Material</collectingMunicipality>
herein constitutes the first record from deep waters, collected in
<collectingCountry id="F36E7634FF5ABE90FC2D74C5F31EFD22" box="[990,1079,682,705]" name="Vanuatu" pageId="190" pageNumber="777">Vanuatu</collectingCountry>
(Fig. 99), in
<quantity id="4C819B41FF5ABE90FB3174C5F210FD22" box="[1218,1337,682,706]" metricMagnitude="2" metricUnit="m" metricValue="4.2" metricValueMax="4.4" metricValueMin="4.0" pageId="190" pageNumber="777" unit="m" value="420.0" valueMax="440.0" valueMin="400.0">
<elevation id="0054D197FF5ABE90FB3174C5F210FD22" box="[1218,1337,682,706]" metricMagnitude="2" metricUnit="m" metricValue="4.2" metricValueMax="4.4" metricValueMin="4.0" pageId="190" pageNumber="777" unit="m" value="420.0" valueMax="440.0" valueMin="400.0">400-440 m</elevation>
</quantity>
.
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="C363652FFF5ABE90FF277480F4E3FAB6" pageId="190" pageNumber="777" type="description">
<paragraph id="8BC636A4FF5ABE90FF277480F518FC56" blockId="190.[212,1444,751,1365]" pageId="190" pageNumber="777">
DESCRIPTION. —
<emphasis id="B90DEAB6FF5ABE90FE6D749EF55CFCEB" box="[414,629,753,776]" italics="true" pageId="190" pageNumber="777">External morphology</emphasis>
. Length
<quantity id="4C819B41FF5ABE90FD2B7480F430FCE4" box="[728,793,751,775]" metricMagnitude="-3" metricUnit="m" metricValue="6.0" pageId="190" pageNumber="777" unit="mm" value="6.0">6 mm</quantity>
(single specimen examined). Animal oval, with 2 large and thick ventro-lateral expansions (Figs 97A, 98A) that are probably used for swimming, as in other species of the genus. The cephalic shield is oval with a conical, dorsal protuberance and 2 blunt posterior expansions. The dorsum is smooth. On the posterior end of the body there are 2 conical processes or flagella. On the right side of the body there is a small, unipinnate gill, with 7 pinnae (Fig. 98B). The gill is surrounded by the genital aperture anteriorly and the anal papillae posteriorly.
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF0175D0F4E8FBFE" blockId="190.[212,1444,751,1365]" pageId="190" pageNumber="777">The colour of the living animals is uniformly whitish with bright red spots on the centre of the dorsum, around the ventro-lateral expansions, and on the cephalic shield. Posterior end of the cephalic shield edged by a bright yellow line. Flagella bright yellowish with red spots. Gill uniformly white.</paragraph>
<paragraph id="8BC636A4FF5ABE90FF017247F65DFB44" blockId="190.[212,1444,751,1365]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FF017247F665FBDC" box="[242,332,1064,1087]" italics="true" pageId="190" pageNumber="777">Anatomy</emphasis>
. The radular formula is 18 x 5.0.
<quantity id="4C819B41FF5ABE90FD437248F5F1FBDC" box="[688,728,1063,1087]" metricMagnitude="-1" metricUnit="m" metricValue="1.27" pageId="190" pageNumber="777" unit="in" value="5.0">5 in</quantity>
a
<quantity id="4C819B41FF5ABE90FD017248F41BFBDC" box="[754,818,1063,1087]" metricMagnitude="-3" metricUnit="m" metricValue="6.0" pageId="190" pageNumber="777" unit="mm" value="6.0">6 mm</quantity>
long specimen (MUSORSTOM 8 CP 963). The innermost lateral teeth are hamate, with a long, curved cusp, and 5-7 sharp denticles (Fig. 95C). The denticles vary in size and shape among teeth. The rest of the lateral teeth are also hamate but smooth, with no denticles, and considerably smaller in size.
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF0172DDF4E3FAB6" blockId="190.[212,1444,751,1365]" pageId="190" pageNumber="777">The reproductive system is monaulic (Fig. 98C). The ampulla is very long and convoluted. It connects to the narrow, short post-ampullary duct. The post-ampullary duct continues distally to the common general atrium. Also entering the common atrium are the female glands and the bursa copulatrix. From the gonopore an open seminal groove runs anteriorly to the protrusible cephalic penis and the prostate. The prostate is elongate and connects proximally into the penial sac. The penial opening has a retractor muscle attached.</paragraph>
</subSubSection>
<subSubSection id="C363652FFF5ABE91FF2773EDF5E0FBD0" lastPageId="191" lastPageNumber="778" pageId="190" pageNumber="777" type="discussion">
<paragraph id="8BC636A4FF5ABE90FF2773EDF5BBF96E" blockId="190.[212,658,1410,1677]" pageId="190" pageNumber="777">
REMARKS. — The material here examined differs from shallow water specimens of
<taxonomicName id="4C794D27FF5ABE90FF2773A7F6F0FA03" authorityName="Baba &amp; Tokioka" authorityYear="1965" box="[212,473,1480,1504]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="190" pageNumber="777" phylum="Mollusca" rank="species" species="bicornutum">
<emphasis id="B90DEAB6FF5ABE90FF2773A7F6F0FA03" box="[212,473,1480,1504]" italics="true" pageId="190" pageNumber="777">Gastropteron bicornutum</emphasis>
</taxonomicName>
in the external colouration. The deep-water specimen lacks the black and opaque white pigment present in the material examined by Gosliner (1989). In addition, the orange-red and yellow spots of the specimen from
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF2770A4F5BBF93F" blockId="190.[212,660,1739,1863]" box="[212,658,1739,1756]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FF2770A4F63CF93F" bold="true" box="[212,277,1739,1756]" pageId="190" pageNumber="777">FIG. 97.</emphasis>
Photographs of living animals.
<emphasis id="B90DEAB6FF5ABE90FDE370A4F534F93F" bold="true" box="[528,541,1739,1756]" pageId="190" pageNumber="777">A</emphasis>
,
<taxonomicName id="4C794D27FF5ABE90FDDB70A4F5BBF93F" box="[552,658,1739,1756]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FDDB70A4F5BBF93F" box="[552,658,1739,1756]" italics="true" pageId="190" pageNumber="777">Gastropteron</emphasis>
</taxonomicName>
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277089F5BBF914" blockId="190.[212,660,1739,1863]" box="[212,658,1766,1783]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FF277089F619F914" box="[212,304,1766,1783]" italics="true" pageId="190" pageNumber="777">bicornutum</emphasis>
<bibRefCitation id="EFE84B55FF5ABE90FECE7089F52CF914" author="BABA K. &amp; TOKIOKA T." box="[317,517,1766,1783]" pageId="190" pageNumber="777" refId="ref123869" refString="BABA K. &amp; TOKIOKA T. 1965. - Two more new species of Gastropteron from [Tectibranchia, Nucleobranchiata, Pulmonata (Thalassophila) et Annexe]." type="book" year="1965">Baba &amp; Tokioka, 1965</bibRefCitation>
, specimen from
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF27716EF5BBF8F1" blockId="190.[212,660,1739,1863]" box="[212,658,1793,1810]" pageId="190" pageNumber="777">
<collectingCountry id="F36E7634FF5ABE90FF27716EF633F8F1" box="[212,282,1793,1810]" name="Vanuatu" pageId="190" pageNumber="777">Vanuatu</collectingCountry>
, MUSORSTOM 8 stn CP 963.
<emphasis id="B90DEAB6FF5ABE90FDD6716EF519F8F1" bold="true" box="[549,560,1793,1810]" pageId="190" pageNumber="777">B</emphasis>
,
<taxonomicName id="4C794D27FF5ABE90FDB3716EF5BBF8F1" box="[576,658,1793,1810]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FDB3716EF5BBF8F1" box="[576,658,1793,1810]" italics="true" pageId="190" pageNumber="777">Philinopsis</emphasis>
</taxonomicName>
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277174F5BDF8CF" blockId="190.[212,660,1739,1863]" box="[212,660,1819,1836]" pageId="190" pageNumber="777">
<emphasis id="B90DEAB6FF5ABE90FF277174F622F8CF" box="[212,267,1819,1836]" italics="true" pageId="190" pageNumber="777">cyanea</emphasis>
(Martens, 1879), specimen from
<collectingCountry id="F36E7634FF5ABE90FDB97174F5B9F8CF" box="[586,656,1819,1836]" name="Vanuatu" pageId="190" pageNumber="777">Vanuatu</collectingCountry>
,
</paragraph>
<paragraph id="8BC636A4FF5ABE90FF277159F69FF8A4" blockId="190.[212,660,1739,1863]" box="[212,438,1846,1863]" pageId="190" pageNumber="777">MUSORSTOM 8 stn CP 963.</paragraph>
<paragraph id="8BC636A4FF5BBE91FF017765F551FE84" blockId="191.[242,1474,266,464]" pageId="191" pageNumber="778">
<collectingCountry id="F36E7634FF5BBE91FF017765F662FEC2" box="[242,331,266,289]" name="Vanuatu" pageId="191" pageNumber="778">Vanuatu</collectingCountry>
are restricted to small areas of the dorsum and cephalic shield. However, the morphology of the radula and the reproductive system are extremely similar to those described by Gosliner (1989) and therefore the material here examined is assigned to this species.
</paragraph>
<paragraph id="8BC636A4FF5BBE91FEE3771DF550FE2C" blockId="191.[242,1474,266,464]" pageId="191" pageNumber="778">
This species differs externally from
<taxonomicName id="4C794D27FF5BBE91FD66771DF4DDFE69" authority="Bergh, 1905" authorityName="Bergh" authorityYear="1905" box="[661,1012,370,394]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="191" pageNumber="778" phylum="Mollusca" rank="species" species="sibogae">
<emphasis id="B90DEAB6FF5BBE91FD66771DF440FE69" box="[661,873,370,394]" italics="true" pageId="191" pageNumber="778">Gastropteron sibogae</emphasis>
Bergh,
<quantity id="4C819B41FF5BBE91FC4E771DF4DDFE69" box="[957,1012,370,394]" metricMagnitude="1" metricUnit="m" metricValue="4.8387" pageId="191" pageNumber="778" unit="in" value="1905.0">1905</quantity>
</taxonomicName>
in having 2 posterior flagella and a dorsal protuberance on the cephalic shield. Internally the seminal receptacle of
<taxonomicName id="4C794D27FF5BBE91FBE077FAF382FE4E" authorityName="Baba &amp; Tokioka" authorityYear="1965" box="[1043,1195,405,429]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="191" pageNumber="778" phylum="Mollusca" rank="species" species="bicornutum">
<emphasis id="B90DEAB6FF5BBE91FBE077FAF382FE4E" box="[1043,1195,405,429]" italics="true" pageId="191" pageNumber="778">G. bicornutum</emphasis>
</taxonomicName>
is more elongate and the prostate is shorter than in
<taxonomicName id="4C794D27FF5BBE91FDFF77D7F55DFE33" authorityName="Bergh" authorityYear="1905" box="[524,628,440,464]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="191" pageNumber="778" phylum="Mollusca" rank="species" species="sibogae">
<emphasis id="B90DEAB6FF5BBE91FDFF77D7F55DFE33" box="[524,628,440,464]" italics="true" pageId="191" pageNumber="778">G. sibogae</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="8BC636A4FF5BBE91FF0175B9F5E0FBD0" blockId="191.[242,1474,982,1075]" pageId="191" pageNumber="778">
<emphasis id="B90DEAB6FF5BBE91FF0175B9F602FC04" bold="true" box="[242,299,982,999]" pageId="191" pageNumber="778">FIG. 98</emphasis>
. External morphology and anatomy of
<taxonomicName id="4C794D27FF5BBE91FDA875B9F4FDFC04" authority="Baba &amp; Tokioka, 1965" authorityName="Baba &amp; Tokioka" authorityYear="1965" box="[603,980,982,999]" class="Gastropoda" family="Gastropteridae" genus="Gastropteron" kingdom="Animalia" order="Cephalaspidea" pageId="191" pageNumber="778" phylum="Mollusca" rank="species" species="bicornutum">
<emphasis id="B90DEAB6FF5BBE91FDA875B9F40AFC04" box="[603,803,982,999]" italics="true" pageId="191" pageNumber="778">Gastropteron bicornutum</emphasis>
<bibRefCitation id="EFE84B55FF5BBE91FCD475B9F4FDFC04" author="BABA K. &amp; TOKIOKA T." box="[807,980,982,999]" pageId="191" pageNumber="778" refId="ref123869" refString="BABA K. &amp; TOKIOKA T. 1965. - Two more new species of Gastropteron from [Tectibranchia, Nucleobranchiata, Pulmonata (Thalassophila) et Annexe]." type="book" year="1965">Baba &amp; Tokioka, 1965</bibRefCitation>
</taxonomicName>
, specimen from
<collectingCountry id="F36E7634FF5BBE91FBA175B9F3BFFC04" box="[1106,1174,982,999]" name="Vanuatu" pageId="191" pageNumber="778">Vanuatu</collectingCountry>
, MUSORSTOM 8 stn CP 963.
<emphasis id="B90DEAB6FF5BBE91FA8F75B9F2A0FC04" bold="true" box="[1404,1417,982,999]" pageId="191" pageNumber="778">A</emphasis>
, dorsal view of the preserved animal, scale bar =
<quantity id="4C819B41FF5BBE91FDC3759FF576FBE2" box="[560,607,1008,1025]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="191" pageNumber="778" unit="mm" value="1.0">1 mm</quantity>
;
<emphasis id="B90DEAB6FF5BBE91FD95759FF558FBE2" bold="true" box="[614,625,1008,1025]" pageId="191" pageNumber="778">B</emphasis>
, detail of the gill, scale bar = 0.5 mm;
<emphasis id="B90DEAB6FF5BBE91FC6A759FF48DFBE2" bold="true" box="[921,932,1008,1025]" pageId="191" pageNumber="778">C</emphasis>
, reproductive system, scale bar = 0.5 mm.Abbreviations:ag, albumen gland; am, ampulla; ap, anal papillae; bc, bursa copulatrix; cs, cephalic shield; esg, external seminal groove; f, flagellum; gl, gill; mg, mucous gland; pn, penial sac; pr, prostate; rm, retractor muscle; sr, seminal receptacle.
</paragraph>
</subSubSection>
</treatment>
</document>
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