148 lines
16 KiB
XML
148 lines
16 KiB
XML
<document id="16E73965629526EC6AD52A90F7C43DF6" ID-CLB-Dataset="33310" ID-DOI="http://dx.doi.org/10.3897/zookeys.665.10476" ID-GBIF-Dataset="deca21d0-8058-4f45-9d40-379243fe86ea" ID-PMC="PMC5523164" ID-Pensoft-Pub="1313-2970-665-1" ID-PubMed="28769624" ID-ZooBank="9117BAF17E9B4E2599EC7C8C6A8F456E" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-665-1" ModsDocOrigin="ZooKeys 665" ModsDocTitle="Chitons (Mollusca, Polyplacophora) from Alacranes Reef, Yucatan, Mexico" checkinTime="1491256510415" checkinUser="pensoft" docAuthor="Reyes-Gomez, Adriana, Ortigosa, Deneb & Simoes, Nuno" docDate="2017" docId="FC9E1B9DAECFCAD12A9CDD4FFE3028A0" docLanguage="en" docName="ZooKeys 665: 1-36" docOrigin="ZooKeys 665" docSource="http://dx.doi.org/10.3897/zookeys.665.10476" docTitle="Stenoplax bahamensis Kaas & Van Belle 1987" docType="treatment" docVersion="6" lastPageNumber="1" masterDocId="CB0B5931FFA4FF90FFDBFFF5FFC0FFC9" masterDocTitle="Chitons (Mollusca, Polyplacophora) from Alacranes Reef, Yucatan, Mexico" masterLastPageNumber="36" masterPageNumber="1" pageNumber="1" updateTime="1701377323243" updateUser="ExternalLinkService">
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<mods:title id="9E1A905F695861F8C11418B5CA10772B">Chitons (Mollusca, Polyplacophora) from Alacranes Reef, Yucatan, Mexico</mods:title>
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<mods:namePart id="EEC6EB2C4CB307971D54020B7FC3D7DD">Reyes-Gomez, Adriana</mods:namePart>
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<mods:namePart id="E288D08A2174D9C84A92C3460E87B6A8">Ortigosa, Deneb</mods:namePart>
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<mods:namePart id="4F0CE84884FB913D77FA9B18A145C7C7">Simoes, Nuno</mods:namePart>
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<mods:date id="109AA3858A84BE76E66D79129E9B4F58">2017</mods:date>
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<mods:detail id="CF59BF858BB065E4B26DD30E3994DC34" type="volume">
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<mods:number id="C2A330FD05F5BBAC469B58FDB7D6DE04">665</mods:number>
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<mods:classification id="180DB485A3343A44CED607ABDB5DFAE9">journal article</mods:classification>
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<mods:identifier id="0C130F62AD5C5DD2CC115EC5F0AF73CC" type="DOI">http://dx.doi.org/10.3897/zookeys.665.10476</mods:identifier>
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<mods:identifier id="C6CF47CDDD6DC03ED38B9668FE04408E" type="Pensoft-Pub">1313-2970-665-1</mods:identifier>
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<treatment id="FC9E1B9DAECFCAD12A9CDD4FFE3028A0" ID-GBIF-Taxon="128123031" LSID="urn:lsid:plazi:treatment:FC9E1B9DAECFCAD12A9CDD4FFE3028A0" httpUri="http://treatment.plazi.org/id/FC9E1B9DAECFCAD12A9CDD4FFE3028A0" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection id="0708EC81E93CB63CEA8D0FF69DA614EC" pageId="0" pageNumber="1" type="nomenclature">
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<paragraph id="804D406E8AEAFADC40D530AD6BE3B1BF" pageId="0" pageNumber="1">
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<taxonomicName id="E04110705C224F05CA39BE7B09BFC218" ID-CoL="523N9" authority="Kaas & Van Belle, 1987" authorityName="Kaas & Van Belle" authorityYear="1987" class="Polyplacophora" family="Ischnochitonidae" genus="Stenoplax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenoplax bahamensis" order="Chitonida" pageId="0" pageNumber="1" phylum="Mollusca" rank="species" species="bahamensis">Stenoplax bahamensis Kaas & Van Belle, 1987</taxonomicName>
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Figures 2
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<normalizedToken id="DF7E6CF38C6F56B6BC4A3CCBB80AD156" originalValue="I–M">I-M</normalizedToken>
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, 4
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<normalizedToken id="A607AC50505B0F2EF420717DF0A5AABD" originalValue="A–H">A-H</normalizedToken>
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</paragraph>
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</subSubSection>
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<subSubSection id="07022BA1E1FBB666C22317205B5016A8" pageId="0" pageNumber="1" type="materials_examined">
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<paragraph id="F8E5E8E2F412B4A758A0364D3BD4A0EF" pageId="0" pageNumber="1">Material examined.</paragraph>
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<paragraph id="01204ADDD4F1517386FD52EEE7371F4B" pageId="0" pageNumber="1">15 specimens; 11-25.4 mm long, 3-8.1 mm wide. Playa Norte (CNMO4942, CNMO4956, CNMO4973, CNMO4976), Isla Perez (CNMO4943, CNMO4944, CNMO4977), Pared Arrecifal (CNMO4957), Blanca y Pajaros (CNMO4961), Laguna Desterrada (CNMO4974, CNMO4975), Laguna Arrecifal (CNMO4978).</paragraph>
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</subSubSection>
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<subSubSection id="2386F66FEC4B97F36B973A31322D00B8" pageId="0" pageNumber="1" type="description">
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<paragraph id="FEE1F0A4CC9DC17081797D2F523F49B0" pageId="0" pageNumber="1">Description.</paragraph>
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<paragraph id="D9CA2F86AEC369FF1D2B068F877908D3" pageId="0" pageNumber="1">
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Medium-sized, elongate-oval chitons, around three times longer than wide. Color of tegmentum variable, mostly cream, dark and lighter green, light brown, with scattered dark brown spots (Figure 2
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<normalizedToken id="3342460239CB0DB72065CBDDE662AAA8" originalValue="I–M">I-M</normalizedToken>
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). Tegmentum with nodulose ribs, arranged concentric to the apex. Head valve (Figure 4A), semi-circular, slightly notched; sculpturing with nodulose ribs, break into numerous and regular nodules, particularly to the periphery. Tail valve (Figure 4B), with elevated postmedian mucro; postmucronal area sculptured as head valve, antemucronal area with 37-42 nodulose ribs. Intermediate valves (Figure 4C), with side margins somewhat rounded; lateral areas elevated, with 14-18 concentric nodulose ribs; pleural areas with 16-19 longitudinal ribs; the ribs next to lateral areas developed few small irregular to rounded lobules or pustules. Articulamentum slightly light blue; apophyses narrow and long twice as wide, wing shaped: jugal laminae smooth and wide (Figure 4D); slit formula 9
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<normalizedToken id="D4FBC5F5A2B9543924B884652285CC3D" originalValue="–13/1/9–">-13/1/9-</normalizedToken>
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13. The ribs next to the postmucronal region tend to form more lobule or pustule like formations than intermediate valves (Figure 4E). Megalaesthetes small and surrounded by 4-6 smaller micraesthetes (Figure 4F). Girdle covered with tiny scales (Figure 4G), each with 11-13 wide, somewhat flat ribs on its surface. Radula (Figure 4H), with tricuspid major lateral tooth, cusps pointed and rather irregular in shape and length, the central and minor lateral teeth about the same length and as narrow and short spatulated shaped.
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</paragraph>
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<caption id="CDBE3CD32C0291540C539A86D11C7825" pageId="0" pageNumber="1">
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<paragraph id="297D2B91DFA4B8BB9111A245765B3BFE" pageId="0" pageNumber="1">
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Figure 4.
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<taxonomicName id="63AD618AD90DAF383220E3C36C127096" class="Polyplacophora" family="Ischnochitonidae" genus="Stenoplax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenoplax bahamensis" order="Chitonida" pageId="0" pageNumber="1" phylum="Mollusca" rank="species" species="bahamensis">Stenoplax bahamensis</taxonomicName>
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Kaas & Van Belle, 1987. Scanning electron images of specimen from Playa Norte (CNMO4973, 23.6 mm length). A head valve (I) in dorsal view, SB = 1 mm B dorsal view of the tail valve (VIII), SB = 1 mm C dorsal view of intermediate valve IV, SB = 1 mm D ventral view of intermediate valve IV, SB = 1 mm E detail of intermediate valve IV, showing the adjacent sculpturing of the lateral and central areas, SB = 1 mm. F aesthetes detail of valve IV, SB = 100
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<normalizedToken id="DCBE9915979C4318437DC4F0A29379C2" originalValue="μm">μm</normalizedToken>
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G girdle scales detail, SB = 50
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<normalizedToken id="392916A9AC3BFA0FE4227E56D2324A94" originalValue="μm">μm</normalizedToken>
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H detail of radular teeth, SB = 150
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<normalizedToken id="586A85A855D89869B14C5D429AB8249E" 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 id="B4239A47FE0D7F0BA40F00D9F65CADBD" pageId="0" pageNumber="1" type="habitat">
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<paragraph id="1704981B650D6DBC099ECF7E85513F4B" pageId="0" pageNumber="1">Habitat.</paragraph>
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<paragraph id="EC602DC7F80527CCE2B1A7C69FBACE14" pageId="0" pageNumber="1">
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Found in intertidal to shallow subtidal to 12 m depth, on sunken wood, rock and turtlegrass,
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<taxonomicName id="DE3810A725F882A77D6684076BB3B418" lsidName="T. testudinum" pageId="0" pageNumber="1" rank="species" species="testudinum">T. testudinum</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="DE3B11A2456EA0CB98CED9C09CAAEBAC" pageId="0" pageNumber="1" type="remarks">
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<paragraph id="6C43E3B4B9DBB38518AD4CEB1183F392" pageId="0" pageNumber="1">Remarks.</paragraph>
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<paragraph id="668F8C450C4360100B69ABF2914BF95C" pageId="0" pageNumber="1">
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According to
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<bibRefCitation id="BD05D30159D30AA24D4FA9CE72AD6F3B" author="Arce, N" journalOrPublisher="Departamento de Biologia, Universidad de Puerto Rico en Humacao" pageId="11" pageNumber="12" title="Crecimiento alometrico en valvas de Stenoplax spp" url="https://doi.org/10.13140/RG.2.1.3330.8244" volumeTitle="Simposio de Flora y Fauna del Caribe" year="2015">
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Arce and
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<normalizedToken id="5A64681A6031D8F9DCB3430FC62E8252" originalValue="García-Ríos">Garcia-Rios</normalizedToken>
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(2015)
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</bibRefCitation>
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, the sculpturing of small adults of
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<taxonomicName id="50BFA6A33D0A605D41B9DA3673F0FAC4" lsidName="S. floridana" pageId="0" pageNumber="1" rank="species" species="floridana">S. floridana</taxonomicName>
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(18.6 mm) is very similar to
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<taxonomicName id="5EDE3D55AFE3E36BA567F7462D0C846A" lsidName="S. bahamensis" pageId="0" pageNumber="1" rank="species" species="bahamensis">S. bahamensis</taxonomicName>
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adults (31.8 mm), with somewhat continuous ribs in lateral areas. And the juvenile forms of both species (9.6 and 8.6 mm respectively) are almost identical, making their identification quite difficult.
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</paragraph>
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<paragraph id="2D38445B7D4558D2BD584AEB7A97EA89" pageId="0" pageNumber="1">
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PNAA
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<taxonomicName id="0223E1CD7C9D323F609FC026DFDBE9CF" lsidName="S. bahamensis" pageId="0" pageNumber="1" rank="species" species="bahamensis">S. bahamensis</taxonomicName>
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juveniles (ranging from 11-14.2 mm length), showed continuous ribs in lateral and central areas, with few granular formations next to the diagonal ridge; and our comparison with
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<taxonomicName id="DA922019E833486F812748A16CA45F97" lsidName="S. floridana" pageId="0" pageNumber="1" rank="species" species="floridana">S. floridana</taxonomicName>
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was limited to one adult specimen.
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</paragraph>
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<paragraph id="D53B09518F73C7E529399EF68EAA36FA" pageId="0" pageNumber="1">
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Our observations of adult specimens agree with previous authors (
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<bibRefCitation id="008EDA1F99ACFD0518125D5990A65698" author="Bullock, RC" journalOrPublisher="The Veliger" pageId="11" pageNumber="12" pagination="291 - 307" title="The Stenoplaxlimaciformis (Sowerby, 1832) Species complex in the New World (Mollusca: Polyplacophora: Ischnochitonidae)." volume="27" year="1985">Bullock 1985</bibRefCitation>
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,
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<bibRefCitation id="869FD5999A5E3594432487AE3227EEBB" author="Kaas, P" journalOrPublisher="Brill / Backhuys, Leiden" pageId="12" pageNumber="13" title="Monograph of Living Chitons (Mollusca: Polyplacophora). Vol 3. Suborder Ischnochitonidae. Chaetopleurinae and Ischnochitoninae. Addition to vols. 1 and 2." year="1987">Kaas and Van Belle 1987</bibRefCitation>
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), that distinguish
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<taxonomicName id="7B9A163B1F4383D23724DFCAE34001FD" lsidName="S. bahamensis" pageId="0" pageNumber="1" rank="species" species="bahamensis">S. bahamensis</taxonomicName>
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from
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<taxonomicName id="B088953C485501EDDE1727C8B9C7DBE6" lsidName="S. floridana" pageId="0" pageNumber="1" rank="species" species="floridana">S. floridana</taxonomicName>
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by the absence of inconspicuous pustule formation next to the lateral area (Figure 4E). Examination of
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<taxonomicName id="27088CCA54585E4204525AF5E09CE946" lsidName="S. floridana" pageId="0" pageNumber="1" rank="species" species="floridana">S. floridana</taxonomicName>
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(26.7
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<normalizedToken id="063D4006B4055B7D613C0EB51E270E20" originalValue="×">x</normalizedToken>
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9.2mm) (CNMO5557) from Banco Chinchorro, Quintana Roo (Figure 14
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<normalizedToken id="6BE38DA0C873CB2D08D4DA37E1BF903C" originalValue="E–G">E-G</normalizedToken>
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), revealed central areas with granulate ribs, and lateral areas raised higher, with strong tuberculated discontinuous ribs, also present in head valve and postmucronal area of tail valve, whereas
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<taxonomicName id="4AC0A22B2301B3792382B4BC726EE8F4" lsidName="S. bahamensis" pageId="0" pageNumber="1" rank="species" species="bahamensis">S. bahamensis</taxonomicName>
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develops lower lateral areas with more continuous ribs.
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</paragraph>
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<paragraph id="6D108F74920542B3DE410BCA06F7711F" pageId="0" pageNumber="1">
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<bibRefCitation id="CE22A7D045DC66613E5A769E9A9067E1" author="Bullock, RC" journalOrPublisher="The Veliger" pageId="11" pageNumber="12" pagination="291 - 307" title="The Stenoplaxlimaciformis (Sowerby, 1832) Species complex in the New World (Mollusca: Polyplacophora: Ischnochitonidae)." volume="27" year="1985">Bullock (1985)</bibRefCitation>
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contributed on the knowledge of Caribbean
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<taxonomicName id="7D1F4B3B126B14033D543B996E672CAF" class="Polyplacophora" family="Ischnochitonidae" genus="Stenoplax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenoplax" order="Chitonida" pageId="0" pageNumber="1" phylum="Mollusca" rank="genus">Stenoplax</taxonomicName>
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s.s. species. He presented an exhaustive review of species aesthete density, major lateral tooth outline and sculpturing morphology. Based on his observations, he grouped
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<taxonomicName id="54005AD719DBB757D03356C5A3176189" lsidName="S. bahamensis" pageId="0" pageNumber="1" rank="species" species="bahamensis">S. bahamensis</taxonomicName>
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and
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<taxonomicName id="EADA4F357C1CA1E54D04FFB1D2C147C3" lsidName="S. floridana" pageId="0" pageNumber="1" rank="species" species="floridana">S. floridana</taxonomicName>
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in a single lineage, defined on the reduced rib width, fewer aesthetes and elongate denticle cap. In addition to the examination, he also included the basal spot of the major lateral tooth, and an outline of the denticle cap, which according to him was distinctive, and useful as taxonomic character to distinguish among other chiton species. However, the differentiation of
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<taxonomicName id="BD523BF4734D43AB98DAFF47FCB49157" class="Polyplacophora" family="Ischnochitonidae" genus="Stenoplax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenoplax" order="Chitonida" pageId="0" pageNumber="1" phylum="Mollusca" rank="genus">Stenoplax</taxonomicName>
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Caribbean species we have used here relies more on adult sculpturing differences (on how broken the ribs can appear, and if there is pustule development (Figure 14G) in the diagonal ridge of intermediate valves).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |