178 lines
16 KiB
XML
178 lines
16 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.152.1646" ID-GBIF-Dataset="337c3a1d-dd49-48b8-9843-889a66fb2505" ID-PMC="PMC3234422" ID-Pensoft-Pub="1313-2970-152-1" ID-PubMed="22287903" ModsDocAuthor="" ModsDocDate="2011" ModsDocID="1313-2970-152-1" ModsDocOrigin="ZooKeys 152" ModsDocTitle="Microgloma Sanders & Allen, 1973 (Nuculanidae) and Pristigloma Dall, 1900 (Pristiglomidae) (Pelecypoda) in the Campos Basin of Brazil" checkinTime="1451249519747" checkinUser="pensoft" docAuthor="Benaim, Natalia Pereira & Absalao, Ricardo Silva" docDate="2011" docId="C61F605595CF75E803C14F686C89B039" docLanguage="en" docName="ZooKeys 152: 1-20" docOrigin="ZooKeys 152" docSource="http://dx.doi.org/10.3897/zookeys.152.1646" docTitle="Microgloma macaron Benaim & Absalao, 2011, sp. n." docType="treatment" docVersion="4" lastPageNumber="12" masterDocId="E60BFFD6FFC2FF8F33128942FFF9FFEA" masterDocTitle="Microgloma Sanders & Allen, 1973 (Nuculanidae) and Pristigloma Dall, 1900 (Pristiglomidae) (Pelecypoda) in the Campos Basin of Brazil" masterLastPageNumber="20" masterPageNumber="1" pageNumber="9" updateTime="1668152906306" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Microgloma Sanders & Allen, 1973 (Nuculanidae) and Pristigloma Dall, 1900 (Pristiglomidae) (Pelecypoda) in the Campos Basin of Brazil</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Benaim, Natalia Pereira</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Absalao, Ricardo Silva</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2011</mods:date>
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<mods:detail type="volume">
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<mods:number>152</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>20</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.152.1646</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.152.1646</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-152-1</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="152032529" LSID="urn:lsid:zoobank.org:act:31275EB9-546D-414B-82B0-C59CA55F8C93" httpUri="http://treatment.plazi.org/id/C61F605595CF75E803C14F686C89B039" lastPageId="11" lastPageNumber="12" pageId="8" pageNumber="9">
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<subSubSection pageId="8" pageNumber="9" type="nomenclature">
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<paragraph pageId="8" pageNumber="9">
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<taxonomicName LSID="urn:lsid:zoobank.org:act:31275EB9-546D-414B-82B0-C59CA55F8C93" class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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<taxonomicNameLabel pageId="8" pageNumber="9">sp. n.</taxonomicNameLabel>
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Figs 1422
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</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="holotype">
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<paragraph pageId="8" pageNumber="9">Holotype.</paragraph>
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<paragraph pageId="8" pageNumber="9">MNRJ 19.112 (Figs 14, 16, 18).</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="type locality">
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<paragraph pageId="8" pageNumber="9">Type locality.</paragraph>
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<paragraph pageId="8" pageNumber="9">Campos Basin, #54, 12/12/2002, 750m, 21°57'17,5"S, 39°56' 01,1"W.</paragraph>
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<paragraph pageId="8" pageNumber="9">Paratypes. IBUFRJ 15297, 8 valves and 2 specimens; MZUSP 99979, 4 valves; USNM 1156943, 6 valves; MNHN 24596, 6 valves; all from the type locality.</paragraph>
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</subSubSection>
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<subSubSection pageId="8" pageNumber="9" type="etymology">
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<paragraph pageId="8" pageNumber="9">Etymology.</paragraph>
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<paragraph pageId="8" pageNumber="9">The species epithet refers to the French macaroon cookie ("macaron" in the French language), which has a similar appearance to the articulated valves. The species epithet is proposed as a noun in apposition.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="9" lastPageNumber="10" pageId="8" pageNumber="9" type="material examined">
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<paragraph pageId="8" pageNumber="9">Material examined.</paragraph>
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<paragraph lastPageId="9" lastPageNumber="10" pageId="8" pageNumber="9">
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IBUFRJ 19145 (# 32, 2002), 3 valves; IBUFRJ 19146 (# 33, 2002), 1 valve; IBUFRJ 19147 (# 34, 2002), 1 valve; IBUFRJ 19148 (# 36, 2002), 1 valve; IBUFRJ 15482 (# 54, 2002), 6 valves; IBUFRJ 17033 (# 59, 2002), 1 specimen; IBUFRJ 19150 (# 61, 2002), 3 specimens; IBUFRJ 16074 (# 64, 2002), 14 valves and 1 specimen; IBUFRJ 15141 (# 69, 2002), 7 valves; IBUFRJ 15285 (# 74, 2002), 2 valves; IBUFRJ 15635 (# 54, 2003), 32 valves and 5 specimens; IBUFRJ 19152 (# 59, 2003), 6 valves and 1 specimen; IBUFRJ 19153 (# 61, 2003), 1 valve; IBUFRJ 19153 (# 61, 2003), 1 valve; IBUFRJ 19154 (# 64, 2003), 18 valves and 4 specimens; IBUFRJ 19155 (# 69, 2003),
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<pageBreakToken pageId="9" pageNumber="10" start="start">4</pageBreakToken>
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valves; IBUFRJ 19156 (# D11, 2008), 1 specimen; IBUFRJ 19157 (# G12, 2008), 1 specimen; IBUFRJ 19158 (# A7, 2008), 10 specimens; IBUFRJ 19159 (# A7, 2008), 1 specimen; IBUFRJ 19160 (# A7, 2008), 2 valves and 5 specimens; IBUFRJ 19161 (# D7, 2008), 1 specimen; IBUFRJ 19162 (# D7, 2008), 6 specimens; IBUFRJ 19163 (# CANAC7, 2008), 1 specimen; IBUFRJ 19164 (# H7, 2008), 1 specimen; IBUFRJ 19165 (# H7, 2008), 1 specimen; IBUFRJ 19166 (# H7, 2008), 5 specimens; IBUFRJ 19167 (# I7, 2008), 2 specimens; IBUFRJ 19168 (# A7, 2009), 3 specimens; IBUFRJ 19169 (# A7, 2009), 5 specimens; IBUFRJ 19170 (# D6, 2009), 1 specimen; IBUFRJ 19171 (# D7, 2009), 1 specimen; IBUFRJ 19172 (# H7, 2009), 12 specimens; IBUFRJ 19173 (# CANAC7, 2009), 1 specimen; IBUFRJ 19174 (# CANAC7, 2009), 1 specimen; IBUFRJ 19175 (# CANG7, 2009), 3 specimens; IBUFRJ 19177 (# 64, 2003), 4 specimens.
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</paragraph>
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<caption pageId="9" pageNumber="10">
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<paragraph pageId="9" pageNumber="10">
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Figures 14-18.
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="9" pageNumber="10" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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sp. n. Internal view, right valve 14 left valve 15 detail of the hinge plate and ligament 16 External view, right valve 17 left valve 18 Holotype MNRJ 19112 (14,16,18). Paratype IBUFRJ 15297 15, 17 Scale bars: 14, 16= 200
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<normalizedToken originalValue="µm">µm</normalizedToken>
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; 15, 18 = 300
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<normalizedToken originalValue="µm">µm</normalizedToken>
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; 17 = 250
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<caption pageId="9" pageNumber="10">
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<paragraph pageId="9" pageNumber="10">
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Figures 19-22.
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="9" pageNumber="10" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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sp. n. Dorsal view 19 prodissoconch 20 (IBUFRJ 15297). Ventral margin view, extended margin 21 periostracum of the ventral margin 22 (IBUFRJ 19177). Scale bars: 19, 21 = 200
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<normalizedToken originalValue="µm">µm</normalizedToken>
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; 20, 22 = 100
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="9" pageNumber="10" type="diagnosis">
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<paragraph pageId="9" pageNumber="10">Diagnosis.</paragraph>
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<paragraph pageId="9" pageNumber="10">Shell minute, ovate. Entire shell margin thickened and covered by an extension of the periostracum. Prodissoconch surface with one subtle radial striae.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10" type="description">
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<paragraph pageId="9" pageNumber="10">Description.</paragraph>
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<paragraph lastPageId="10" lastPageNumber="11" pageId="9" pageNumber="10">
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Shell minute, ovate, H/L ratio about 0.81 (n 38, min 0.75, max 0.92), W/H ratio about 0.84 (n 14, min 0.77, max 0.87), glossy, translucent, robust
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<pageBreakToken pageId="10" pageNumber="11" start="start">for</pageBreakToken>
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its size, equilateral; umbones prominent, large, posterior to midline, orthogyrous.
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<normalizedToken originalValue="Antero–dorsal">Antero-dorsal</normalizedToken>
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margin straight, oblique; anterior margin rounded, extended.
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<normalizedToken originalValue="Antero–ventral">Antero-ventral</normalizedToken>
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margin,
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<normalizedToken originalValue="postero–ventral">postero-ventral</normalizedToken>
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margin shorter and rising up to the short posterior end; posterior margin slightly truncated, forming a small shoulder. Entire shell margin thickened and covered by an extension of the periostracum, resembling a macaroon in ventral view (Figs 21-22). Surface with commarginal growth lines. Hinge plate with 5-7 anterior and 4-5 posterior teeth, interrupted by a large, rectangular and shallow resilifer. Width of both anterior and posterior row of teeth occupies about 70% of width of hinge plate, which is thick for its size (whp/H approximately Campos Basin, #54, 12/12/2002 0.14). Posterior part of the hinge plate shorter than anterior one. Prodissoconch surface nacreous, with one subtle radial striae (Fig 20), and length approximately 244
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<normalizedToken originalValue="µm">µm</normalizedToken>
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. Maximum adult shell length 1.20 mm.
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</paragraph>
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<caption pageId="10" pageNumber="11">
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<paragraph pageId="10" pageNumber="11">Table 3. Measurements of the type material. * Width = width of a single valve.</paragraph>
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</caption>
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<paragraph pageId="10" pageNumber="11">
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<table pageId="10" pageNumber="11">
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<tr pageId="10" pageNumber="11">
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<th colspan="4" pageId="10" pageNumber="11" rowspan="1">
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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sp. n.
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</th>
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</tr>
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<tr pageId="10" pageNumber="11">
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<th colspan="1" pageId="10" pageNumber="11" rowspan="1">Length</th>
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<th colspan="1" pageId="10" pageNumber="11" rowspan="1">Height</th>
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<th colspan="1" pageId="10" pageNumber="11" rowspan="1">Width*</th>
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</tr>
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</table>
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="11" lastPageNumber="12" pageId="10" pageNumber="11" type="remarks">
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<paragraph pageId="10" pageNumber="11">Remarks.</paragraph>
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<paragraph pageId="10" pageNumber="11">
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In some other species of
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma" order="Nuculanida" pageId="10" pageNumber="11" phylum="Mollusca" rank="genus">Microgloma</taxonomicName>
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, the shell is expanded ventrally, around the valve, which enlarges the internal volume of the animal and counterbalances the effects of miniaturization (
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<bibRefCitation author="Ockelmann, K" journalOrPublisher="Ophelia" pageId="16" pageNumber="17" pagination="1 - 24" title="Taxonomy and biological notes on the Bivalve genus Microgloma with coments on protobranch nomenclature." volume="48" year="1998">
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Ockelmann and
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<normalizedToken originalValue="Warén">Waren</normalizedToken>
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1998
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</bibRefCitation>
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,
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<bibRefCitation author="La Perna, R" journalOrPublisher="The Veliger" pageId="16" pageNumber="17" pagination="149 - 162" title="Revision of the protobranch species described by Dautzenberg and Fischer (1897) with description of a new species and taxonomic comments on Bathyspinula (Bivalvia, Nuculanoidea)." volume="50" year="2008">La Perna 2008</bibRefCitation>
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). However, in
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="10" pageNumber="11" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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this expansion is thicker, and the periostracum surrounds the entire margin (Fig. 22). This characteristic of the periostracum deserves special attention since it not only covers the shell to the margins in the usual way, but is more conspicuous in this area, giving the impression that valves do not articulate. We are not sure how this system works, and how the animal, in spite of having these fibers surrounding the valve apertures, can have water flux in the mantle cavity.
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</paragraph>
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<paragraph pageId="11" pageNumber="12">
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<pageBreakToken pageId="11" pageNumber="12" start="start">Compared</pageBreakToken>
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to
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma pusilla" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="pusilla">Microgloma pusilla</taxonomicName>
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and
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma mirmidina" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="mirmidina">Microgloma mirmidina</taxonomicName>
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,
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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is distinguished by the ovate outline, umbones at midline and much more projecting, and a thicker hinge plate.
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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is similar to
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma yongei" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="yongei">Microgloma yongei</taxonomicName>
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in outline, but compared with the paratypes figured by
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<bibRefCitation author="Ockelmann, K" journalOrPublisher="Ophelia" pageId="16" pageNumber="17" pagination="1 - 24" title="Taxonomy and biological notes on the Bivalve genus Microgloma with coments on protobranch nomenclature." volume="48" year="1998">
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Ockelmann and
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<normalizedToken originalValue="Warén">Waren</normalizedToken>
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(1998
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</bibRefCitation>
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, page 14, fig 6-D), the former has more prominent umbones, a thicker hinge plate, as well as a larger resilifer.
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma macaron" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="macaron">Microgloma macaron</taxonomicName>
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can be distinguished from
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma tumidula" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="tumidula">Microgloma tumidula</taxonomicName>
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by the shape of the teeth, which are not as inclined as in this latter species. The anterior and posterior areas of the hinge plate form a less obtuse angle compared to those of
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<taxonomicName class="Bivalvia" family="Yoldiidae" genus="Microgloma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Microgloma tumidula" order="Nuculanida" pageId="11" pageNumber="12" phylum="Mollusca" rank="species" species="tumidula">Microgloma tumidula</taxonomicName>
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.
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</paragraph>
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<paragraph pageId="11" pageNumber="12">Except for two, probably worn, valves found at twostations at approx. 3000 m depth, and one at 1970 m, this species is concentrated at depths between 400-750 m. Untill now this species is reccorded solely in Campos Basin.</paragraph>
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</subSubSection>
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</treatment>
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</document> |