155 lines
18 KiB
XML
155 lines
18 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.238.3884" ID-GBIF-Dataset="6ef437d7-50fb-4840-aced-3737357c9b03" ID-PMC="PMC3496946" ID-Pensoft-Pub="1313-2970-238-77" ID-PubMed="23226709" ModsDocAuthor="" ModsDocDate="2012" ModsDocID="1313-2970-238-77" ModsDocOrigin="ZooKeys 238" ModsDocTitle="Two new species of Tornidae (Caenogastropoda, Rissooidea) from Espírito Santo, Brazil" checkinTime="1451248581894" checkinUser="pensoft" docAuthor="Simone, Luiz Ricardo L." docDate="2012" docId="F312B60C341483D7660EEF74922DE187" docLanguage="en" docName="ZooKeys 238: 77-85" docOrigin="ZooKeys 238" docSource="http://dx.doi.org/10.3897/zookeys.238.3884" docTitle="mohicanus Simone, 2012, sp. n." docType="treatment" docVersion="4" lastPageNumber="80" masterDocId="FF9EFFACFFA0FFE6FFADFF95110CFFCE" masterDocTitle="Two new species of Tornidae (Caenogastropoda, Rissooidea) from Espirito Santo, Brazil" masterLastPageNumber="85" masterPageNumber="77" pageNumber="78" updateTime="1668154674805" 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>Two new species of Tornidae (Caenogastropoda, Rissooidea) from Espirito Santo, 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>Simone, Luiz Ricardo L.</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>2012</mods:date>
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<mods:detail type="volume">
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<mods:number>238</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>77</mods:start>
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<mods:end>85</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.238.3884</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.238.3884</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-238-77</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="152037760" LSID="urn:lsid:zoobank.org:act:FF9F3D9C-8BF9-4CAB-A236-8C143BA62A6F" httpUri="http://treatment.plazi.org/id/F312B60C341483D7660EEF74922DE187" lastPageId="3" lastPageNumber="80" pageId="1" pageNumber="78">
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<subSubSection pageId="1" pageNumber="78" type="nomenclature">
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<paragraph pageId="1" pageNumber="78">
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<taxonomicName LSID="urn:lsid:zoobank.org:act:FF9F3D9C-8BF9-4CAB-A236-8C143BA62A6F" genus="Mohicanus" lsidName="mohicanus" pageId="1" pageNumber="78" rank="genus">Cyclostremiscus mohicanus</taxonomicName>
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<taxonomicNameLabel pageId="1" pageNumber="78">sp. n.</taxonomicNameLabel>
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Figs 1-15
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="78" type="types">
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<paragraph pageId="1" pageNumber="78">Types.</paragraph>
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<paragraph pageId="1" pageNumber="78">Holotype MZSP 106551 (Figs 1-5). Paratypes: 106552, 16 shells from type locality.</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="type locality">
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<paragraph pageId="2" pageNumber="79">
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<pageBreakToken pageId="2" pageNumber="79" start="start">Type</pageBreakToken>
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locality.
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</paragraph>
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<paragraph pageId="2" pageNumber="79">
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BRAZIL.
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<normalizedToken originalValue="Espírito">Espirito</normalizedToken>
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Santo;
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<normalizedToken originalValue="São">Sao</normalizedToken>
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Mateus, Guriri, 18°47'S, 32°39'W, 3 m depth.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="diagnosis">
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<paragraph pageId="2" pageNumber="79">Diagnosis.</paragraph>
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<paragraph pageId="2" pageNumber="79">Shell of about 2.5 mm; almost planispiral. Three carina-like spiral threads somewhat equidistant; superior surface smooth or with scanty spiral cords. Periphery smooth except threads. Peri-umbilical area with string spiral cords. Periostracum with aligned series of tall rods on spiral threads.</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="description">
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<paragraph pageId="2" pageNumber="79">Description.</paragraph>
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<paragraph pageId="2" pageNumber="79">
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Shell. Up to ~2.5 mm, discoid; height ~52% of maximum width (Figs 3, 10, 12). Color pure white, weakly translucent (Figs 1, 2, 5, 6). Protoconch of 2 whorls, weakly-turbiform (Figs 4, 10, 11, 15); whorls of rounded profile, suture shallow; surface glossy, smooth; occupying ~10% of shell size; located almost central, weakly dislocated towards right. Transition protoconch-teleoconch unclear (Fig. 15). Spire weakly elevated, with ~45% of shell width; ~15% of shell height. Teleoconch up to 2.5 whorls, uniformly growing weakly planispiral, bearing three somewhat equidistant carinas (Figs 9, 10, 11, 12); peripheral carina as tallest, profile blunt, ~100°, located in middle level of last whorl, inflating ~15% shell width; inferior carina similar to peripheral carina, located midway between this and peri-umbilical slope (Figs 10, 12, 13); superior carina with ~half size as peripheral carina, located midway between this and adjacent suture (Figs 6, 8, 9, 11); between carinas somewhat planar surface, being weakly elevated in
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<normalizedToken originalValue="carina’s">carina's</normalizedToken>
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base. Sculpture superior to peripheral carina absent (Figs 11, 14) to series of narrow, low, obsolete spiral cords (Figs 6, 8), varying from zero (surface smooth, Fig. 14) to ~10 (Fig. 8); interspaces between spiral cords ~1/4 their width; sculpture inferior to peripheral carina absent (smooth). Umbilicum widely opened; maximum diameter ~30% shell width; flanking by strong, somewhat planar slope; sculptured from 1 to 5 spiral cords, with interspaces ~3 times their width (Figs 5, 7, 12, 13). Aperture weakly prosocline (Figs 4, 9, 11, 13); rounded, weakly pentangular, i.e., bearing somewhat equidistant blunt angles produced by three carinas and umbilical slope (Figs 10, 12); with ~35% shell width, ~70% of shell height. Callus practically absent, weakly covering adjacent whorl in apertural implantation.
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</paragraph>
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<paragraph pageId="2" pageNumber="79">Periostracum (Figs 1-5). Opaque, transparent, color pale beige. Series of tall rods aligned on three carinas; rods of peripheral carina augmenting ~10% shell width (Figs 1, 2), about twice taller than wide, tip rounded, slightly broader than base; rods of superior carina similar to those of peripheral carina, with ~80% of their size (Figs 3, 4); rods of inferior carina also similar to those of peripheral carina, with ~30% their height and ~60% their width (Figs 3, 5). Each rod blade-like, flexible, located close to each other from same carina, forming tall flexible ridge on each carina. Periostracum ridge on three carinas suddenly finishing at apertural level. On aperture, region between ridge of superior carina and insertion of outer lip in adjacent preceding whorl a small region with ridge of peripheral ridge reabsorbed, forming anal notch with ~1/5 of aperture size (Figs 1, 2, 5).</paragraph>
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<paragraph pageId="2" pageNumber="79">Measurements (in mm). Holotype: 2.8 by 0.9; paratype 106552 (Fig. 10): 1.7 by 0.8.</paragraph>
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<caption pageId="2" pageNumber="79">
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<paragraph pageId="2" pageNumber="79">
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Figures 1-15.
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="2" pageNumber="79" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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sp. n. types 1 holotype MZSP 106551 (W 2.8 mm), apical view 2 same, umbilical view 3 same, apertural view 4 same, apertural-slightly apical view 5, same, apertural-slightly umbilical view 6 paratype MZSP 106552 #1, apical view (W 1.8 mm) 7 same, umbilical view 8 #2, apical view (W 1.7 mm) 9 #1, apertural-slightly apical view 10 same, apertural view 11 #3, SEM, apertural-slightly apical view (W 1.7 mm) 12 same, apertural view 13 same, apertural-slightly umbilical view 14 #4, SEM, apical view (W 1.5 mm) 15 same, detail of apical region, scale 0.1 mm.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="distribution">
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<paragraph pageId="2" pageNumber="79">Distribution.</paragraph>
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<paragraph pageId="2" pageNumber="79">Only known from type locality.</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="habitat">
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<paragraph pageId="2" pageNumber="79">Habitat</paragraph>
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<paragraph pageId="2" pageNumber="79">. Sandy bottoms, 3 m depth (no living specimens).</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="79" type="material examined">
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<paragraph pageId="2" pageNumber="79">Material examined.</paragraph>
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<paragraph pageId="2" pageNumber="79">Types.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="3" lastPageNumber="80" pageId="2" pageNumber="79" type="discussion">
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<paragraph pageId="2" pageNumber="79">Discussion.</paragraph>
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<paragraph lastPageId="3" lastPageNumber="80" pageId="2" pageNumber="79">
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="2" pageNumber="79" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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is similar to
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus beauii" order="Littorinimorpha" pageId="2" pageNumber="79" phylum="Mollusca" rank="species" species="beauii">Cyclostremiscus beauii</taxonomicName>
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(Fischer, 1857) (
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<bibRefCitation pageId="2" pageNumber="79">Rosenberg et al. 2009</bibRefCitation>
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;
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<bibRefCitation author="Rubio, F" journalOrPublisher="Iberus" pageId="6" pageNumber="83" pagination="1 - 230" title="The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas." volume="29" year="2011">Rubio et al. 2011</bibRefCitation>
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) from Florida and Caribbean. It differs by the smoother superior surface, lacking so developed spiral cords, the contrary happens in the umbilicum, in such that of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="2" pageNumber="79" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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has a series of spiral cords, while
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus beauii" order="Littorinimorpha" pageId="2" pageNumber="79" phylum="Mollusca" rank="species" species="beauii">Cyclostremiscus beauii</taxonomicName>
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<pageBreakToken pageId="3" pageNumber="80" start="start">has</pageBreakToken>
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only growth lines; the size is also different, as
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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has about 3 mm, while
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus beauii" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="beauii">Cyclostremiscus beauii</taxonomicName>
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reaches 9-10 mm.
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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also resembles
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus pentagonus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="pentagonus">Cyclostremiscus pentagonus</taxonomicName>
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(Gabb, 1873), also from Caribbean, it differs by the more developed spiral sculpture in the superior shell surface, by the peri-umbilical spiral sculpture, in being slightly taller (height/width tax= ~52% against ~48% of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus pentagonus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="pentagonus">Cyclostremiscus pentagonus</taxonomicName>
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), and in having the peripheral carina slightly more elevated.
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus pentagonus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="pentagonus">Cyclostremiscus pentagonus</taxonomicName>
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has been referred as occurring in south Brazil (
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<bibRefCitation pageId="3" pageNumber="80">Rios 2009</bibRefCitation>
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: 59, in Porto Belo, Santa Catarina;
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<bibRefCitation author="Rubio, F" journalOrPublisher="Iberus" pageId="6" pageNumber="83" pagination="1 - 230" title="The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas." volume="29" year="2011">Rubio et al. 2011</bibRefCitation>
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: 91); as that material was not found, this record is here considered doubtful, but possibly they are of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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. Another important difference between
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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and
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus pentagonus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="pentagonus">Cyclostremiscus pentagonus</taxonomicName>
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is the protoconch, it has ~2 whorls (Fig. 15), while that of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus pentagonus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="pentagonus">Cyclostremiscus pentagonus</taxonomicName>
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is ~0.5 whorl longer (
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<bibRefCitation author="Rubio, F" journalOrPublisher="Iberus" pageId="6" pageNumber="83" pagination="1 - 230" title="The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas." volume="29" year="2011">Rubio et al. 2011</bibRefCitation>
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, fig. 46F).
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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is also somewhat similar to
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus trilix" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="trilix">Cyclostremiscus trilix</taxonomicName>
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(Bursh, 1885), sharing the size and the carinas shape; however, it differs from that species in lacking the microtubercles on the protoconch, in having spiral sculpture in surface between suture and superior carina, and in being taller (height/width tax= ~52% against ~42% of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus trilix" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="trilix">Cyclostremiscus trilix</taxonomicName>
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).
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</paragraph>
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<paragraph pageId="3" pageNumber="80">
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The periostracum bearing expansions are relatively common in living and fresh-died specimens of tornids. However, a periostracum with the
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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arrangement appears to be novelty. Nothing like that has been found in other congeneric species.
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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clearly belongs to the "group 1" as defined by
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<bibRefCitation author="Rubio, F" journalOrPublisher="Iberus" pageId="6" pageNumber="83" pagination="1 - 230" title="The family Tornidae (Gastropoda, Rissooidea) in the Caribbean and neighboring areas." volume="29" year="2011">Rubio et al. (2011</bibRefCitation>
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: 84), which encompasses carinate species of the genus, with 2 or 3 peripheral carinas. Possibly all carinas of those species are base of periostracal expansions like those of
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<taxonomicName class="Gastropoda" family="Tornidae" genus="Cyclostremiscus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cyclostremiscus mohicanus" order="Littorinimorpha" pageId="3" pageNumber="80" phylum="Mollusca" rank="species" species="mohicanus">Cyclostremiscus mohicanus</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |