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<mods:title id="2910B6DEB5029CAC72AF68D02AAE5575">Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key</mods:title>
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<heading id="AA0C81C5E4515512D0F176D2712EFF1E" bold="true" box="[151,618,151,178]" fontSize="11" level="1" pageId="6" pageNumber="153" reason="1">
<taxonomicName id="36FB4D2AE4515512D0F176D2712EFF1E" ID-CoL="3Q4QL" ID-ENA="413418" authority="Pilsbry, 1893" authorityName="Pilsbry" authorityYear="1893" box="[151,618,151,178]" class="Polyplacophora" family="Ischnochitonidae" genus="Ischnochiton" kingdom="Animalia" order="Chitonida" pageId="6" pageNumber="153" phylum="Mollusca" rank="species" species="tridentatus">
<emphasis id="C38FEABBE4515512D0F176D2712EFF1E" bold="true" box="[151,618,151,178]" pageId="6" pageNumber="153">
<emphasis id="C38FEABBE4515512D0F176D27284FF1D" bold="true" box="[151,448,151,178]" italics="true" pageId="6" pageNumber="153">Ischnochiton tridentatus</emphasis>
Pilsbry, 1893
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<subSubSection id="B9E16522E4515512D0F176FE725EFF7A" box="[151,282,187,213]" pageId="6" pageNumber="153" type="description">
<paragraph id="F14436A9E4515512D0F176FE725EFF7A" blockId="6.[151,618,151,213]" box="[151,282,187,213]" pageId="6" pageNumber="153">
(
<figureCitation id="69C02A2CE4515512D0F976FE7256FF7A" box="[159,274,187,213]" captionStart="FIGURE 2" captionStartId="5.[151,250,1791,1815]" captionTargetBox="[151,1436,181,1767]" captionTargetId="figure-21@5.[151,1436,181,1768]" captionTargetPageId="5" captionText="FIGURE 2. Chiton species obtained from the Northern Gulf of California. A. Dorsal and lateral views of Ischnochiton guatemalensis CUCBACM 00450. B. Dorsal and lateral views of Ischnochiton tridentatus CUCBACM 00453. C. Dorsal and lateral views of Stenoplax limaciformis CUCBACM 00455. D. Dorsal and lateral views of Stenoplax mariposa CUCBACM 00459. E. Dorsal and lateral views of Stenoplax sonorana CUCBACM 00462. F. Dorsal view of Lepidozona clathrata CUCBACM 00464. G. Dorsal view of Lepidozona serrata CUCBACM 00471. H. Dorsal and lateral views of Lepidozona subtilis CUCBACM 00475. I. Dorsal and lateral views of Callistochiton elenensis CUCBACM 00476." figureDoi="http://doi.org/10.5281/zenodo.7973081" httpUri="https://zenodo.org/record/7973081/files/figure.png" pageId="6" pageNumber="153">Figure 2B</figureCitation>
)
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<taxonomicName id="36FB4D2AE4515512D0F1774571A4FEB8" authority="Pilsbry, 1893: 35 - 39" authorityName="Pilsbry" authorityPageNumber="35 - 39" authorityYear="1893" box="[151,736,255,280]" class="Polyplacophora" family="Ischnochitonidae" genus="Ischnochiton" kingdom="Animalia" order="Chitonida" pageId="6" pageNumber="153" phylum="Mollusca" rank="species" species="tridentatus" subGenus="Radsiella">
<emphasis id="C38FEABBE4515512D0F17745725EFEB7" box="[151,282,256,280]" italics="true" pageId="6" pageNumber="153">Ischnochiton</emphasis>
(
<emphasis id="C38FEABBE4515512D14F774572CDFEB7" box="[297,393,256,280]" italics="true" pageId="6" pageNumber="153">Radsiella</emphasis>
)
<emphasis id="C38FEABBE4515512D1F177457141FEB7" box="[407,517,256,280]" italics="true" pageId="6" pageNumber="153">tridentatus</emphasis>
Pilsbry, 1893: 3539
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. Chresonymy and synonymy in
<bibRefCitation id="956A4B58E4515512D4417745766EFEB7" author="Kaas, P. &amp; Van Belle, R." box="[1063,1322,256,280]" pageId="6" pageNumber="153" refId="ref18667" refString="Kaas, P. &amp; Van Belle, R. (1990) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 4. Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706" type="book" year="1990">Kaas &amp; Van Belle (1990)</bibRefCitation>
.
</paragraph>
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<emphasis id="C38FEABBE4515512D0F177037201FEF0" bold="true" box="[151,325,325,352]" pageId="6" pageNumber="153">Type material.</emphasis>
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<typeStatus id="2E40880BE4515512D12A770372FBFECF" box="[332,447,326,352]" pageId="6" pageNumber="153">Lectotype</typeStatus>
, designated by
<bibRefCitation id="956A4B58E4515512D20A770370CCFECF" author="Kaas, P. &amp; Van Belle, R." box="[620,904,326,352]" pageId="6" pageNumber="153" refId="ref18667" refString="Kaas, P. &amp; Van Belle, R. (1990) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 4. Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706" type="book" year="1990">Kaas &amp; Van Belle (1990)</bibRefCitation>
,
<specimenCode id="A15D9ED2E4515512D3F47703776EFECF" box="[914,1066,326,352]" collectionCode="ANSP" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34784" lsid="urn:lsid:biocol.org:col:34784" name="Academy of Natural Sciences of Philadelphia" pageId="6" pageNumber="153">ANSP 66324</specimenCode>
.
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</paragraph>
<paragraph id="F14436A9E4515512D0A1772F7762FE2B" blockId="6.[151,1437,325,856]" box="[199,1062,361,388]" pageId="6" pageNumber="153">
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<emphasis id="C38FEABBE4515512D0A1772F7222FE2C" bold="true" box="[199,358,361,388]" pageId="6" pageNumber="153">
<typeStatus id="2E40880BE4515512D0A1772F7246FE2B" box="[199,258,362,388]" pageId="6" pageNumber="153">Type</typeStatus>
locality.
</emphasis>
<collectorName id="5C0E537FE4515512D10A772F72F8FE2B" box="[364,444,362,388]" pageId="6" pageNumber="153">La Paz</collectorName>
,
<collectingRegion id="333FF84BE4515512D1A1772F71E6FE2B" box="[455,674,362,388]" country="Mexico" name="Baja California Sur" pageId="6" pageNumber="153">Baja California Sur</collectingRegion>
,
<collectingCountry id="89EC7639E4515512D2C8772F7040FE2B" box="[686,772,362,388]" name="Mexico" pageId="6" pageNumber="153">México</collectingCountry>
(
<bibRefCitation id="956A4B58E4515512D374772F775DFE2B" author="Kaas, P. &amp; Van Belle, R." box="[786,1049,362,388]" pageId="6" pageNumber="153" refId="ref18667" refString="Kaas, P. &amp; Van Belle, R. (1990) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 4. Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706" type="book" year="1990">Kaas &amp;Van Belle 1990</bibRefCitation>
)
</materialsCitation>
.
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<paragraph id="F14436A9E4515512D0A177C870D4FE07" blockId="6.[151,1437,325,856]" box="[199,912,397,424]" pageId="6" pageNumber="153">
<emphasis id="C38FEABBE4515512D0A177C872F5FE08" bold="true" box="[199,433,397,423]" pageId="6" pageNumber="153">Material examined.</emphasis>
Seventy
<specimenCount id="E7FDFD20E4515512D24777CB71FBFE07" box="[545,703,398,424]" pageId="6" pageNumber="153" type="generic">six specimens</specimenCount>
, BL
<quantity id="36039B4CE4515512D29277CB70C8FE07" box="[756,908,398,424]" metricMagnitude="-2" metricUnit="m" metricValue="1.375" metricValueMax="2.02" metricValueMin="0.73" pageId="6" pageNumber="153" unit="mm" value="13.75" valueMax="20.2" valueMin="7.3">7.320.2 mm</quantity>
.
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<paragraph id="F14436A9E4515512D0A177F472BBFDBB" blockId="6.[151,1437,325,856]" pageId="6" pageNumber="153">
<emphasis id="C38FEABBE4515512D0A177F4726EFE64" bold="true" box="[199,298,433,459]" pageId="6" pageNumber="153">Habitat.</emphasis>
In the superficial intertidal on mediumsized and small rocks buried in sand. Specimens were collected from numerous loose rocks with dense patches of globular thalli (maximal diameter of
<quantity id="36039B4CE4515512D4B77793765CFE5F" box="[1233,1304,470,496]" metricMagnitude="-1" metricUnit="m" metricValue="2.0" pageId="6" pageNumber="153" unit="cm" value="20.0">20 cm</quantity>
) of the alga
<taxonomicName id="36FB4D2AE4515512D0F177BF72BEFDBB" authority="Decaisne, 1842" authorityName="Decaisne" authorityYear="1842" box="[151,506,506,532]" class="Ulvophyceae" family="Siphonocladaceae" genus="Dictyosphaeria" kingdom="Plantae" order="Siphonocladales" pageId="6" pageNumber="153" phylum="Chlorophyta" rank="genus">
<emphasis id="C38FEABBE4515512D0F177BF7200FDBB" box="[151,324,506,532]" italics="true" pageId="6" pageNumber="153">Dictyosphaeria</emphasis>
<bibRefCitation id="956A4B58E4515512D12D77BF72BEFDBB" author="Decaisne, J." box="[331,506,506,532]" pageId="6" pageNumber="153" pagination="297 - 380" refId="ref17187" refString="Decaisne, J. (1842) Essais sur une classification des algues et des polypiers calciferes de Lamouroux. Annales des Sciences Naturelles, Botanique, Seconde Serie, 17, 297 - 380." type="journal article" year="1842">Decaisne, 1842</bibRefCitation>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="B9E16522E4515512D0A1745B7703FCF7" pageId="6" pageNumber="153" type="discussion">
<paragraph id="F14436A9E4515512D0A1745B712FFDF3" blockId="6.[151,1437,325,856]" pageId="6" pageNumber="153">
<emphasis id="C38FEABBE4515512D0A1745B727FFD97" bold="true" box="[199,315,542,568]" pageId="6" pageNumber="153">Remarks.</emphasis>
<taxonomicName id="36FB4D2AE4515512D124745B7117FD97" authorityName="Pilsbry" authorityYear="1893" box="[322,595,542,568]" class="Polyplacophora" family="Ischnochitonidae" genus="Ischnochiton" kingdom="Animalia" order="Chitonida" pageId="6" pageNumber="153" phylum="Mollusca" rank="species" species="tridentatus">
<emphasis id="C38FEABBE4515512D124745B7117FD97" box="[322,595,542,568]" italics="true" pageId="6" pageNumber="153">Ischnochiton tridentatus</emphasis>
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has a sculpture of concentric zigzag lines and variable tegmentum color of light olive, dark green and gray (
<figureCitation id="69C02A2CE4515512D2607407711AFDF3" box="[518,606,578,604]" captionStart="FIGURE 2" captionStartId="5.[151,250,1791,1815]" captionTargetBox="[151,1436,181,1767]" captionTargetId="figure-21@5.[151,1436,181,1768]" captionTargetPageId="5" captionText="FIGURE 2. Chiton species obtained from the Northern Gulf of California. A. Dorsal and lateral views of Ischnochiton guatemalensis CUCBACM 00450. B. Dorsal and lateral views of Ischnochiton tridentatus CUCBACM 00453. C. Dorsal and lateral views of Stenoplax limaciformis CUCBACM 00455. D. Dorsal and lateral views of Stenoplax mariposa CUCBACM 00459. E. Dorsal and lateral views of Stenoplax sonorana CUCBACM 00462. F. Dorsal view of Lepidozona clathrata CUCBACM 00464. G. Dorsal view of Lepidozona serrata CUCBACM 00471. H. Dorsal and lateral views of Lepidozona subtilis CUCBACM 00475. I. Dorsal and lateral views of Callistochiton elenensis CUCBACM 00476." figureDoi="http://doi.org/10.5281/zenodo.7973081" httpUri="https://zenodo.org/record/7973081/files/figure.png" pageId="6" pageNumber="153">Fig. 2B</figureCitation>
).
</paragraph>
<paragraph id="F14436A9E4515512D0A1742373ADFCBF" blockId="6.[151,1437,325,856]" pageId="6" pageNumber="153">
<bibRefCitation id="956A4B58E4515512D0A1742372A0FD2F" author="Kaas, P. &amp; Van Belle, R." box="[199,484,614,640]" pageId="6" pageNumber="153" refId="ref18667" refString="Kaas, P. &amp; Van Belle, R. (1990) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 4. Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706" type="book" year="1990">Kaas &amp; Van Belle (1990)</bibRefCitation>
reported the distribution of this species throughout the Gulf of
<collectingRegion id="333FF84BE4515512D4D474237662FD2F" box="[1202,1318,614,640]" country="United States of America" name="California" pageId="6" pageNumber="153">California</collectingRegion>
, including Mazatlán. However, recent studies have shown that
<taxonomicName id="36FB4D2AE4515512D28274CE7031FD0B" authorityName="Pilsbry" authorityYear="1893" box="[740,885,650,676]" class="Polyplacophora" family="Ischnochitonidae" genus="Ischnochiton" kingdom="Animalia" order="Chitonida" pageId="6" pageNumber="153" phylum="Mollusca" rank="species" species="tridentatus">
<emphasis id="C38FEABBE4515512D28274CE71A9FD0B" box="[740,749,651,676]" italics="true" pageId="6" pageNumber="153">I</emphasis>
.
<emphasis id="C38FEABBE4515512D29A74CF7031FD0B" box="[764,885,650,676]" italics="true" pageId="6" pageNumber="153">tridentatus</emphasis>
</taxonomicName>
is absent in Mazatlán, while it is abundant at
<collectingRegion id="333FF84BE4515512D51974CF7386FD67" country="El Salvador" name="La Paz" pageId="6" pageNumber="153">La Paz</collectingRegion>
,
<collectingRegion id="333FF84BE4515512D0A974EB72EEFD67" box="[207,426,686,712]" country="Mexico" name="Baja California Sur" pageId="6" pageNumber="153">Baja California Sur</collectingRegion>
(García-Ríos &amp; Álvarez-Ruiz 2007). In the present study, it was only registered at
<collectingRegion id="333FF84BE4515512D53D74EB76D8FD67" box="[1371,1436,686,712]" country="Brazil" name="Bahia" pageId="6" pageNumber="153">Bahía</collectingRegion>
San Carlos,
<collectingRegion id="333FF84BE4515512D17874977235FD43" box="[286,369,722,748]" country="Mexico" name="Sonora" pageId="6" pageNumber="153">Sonora</collectingRegion>
. The maximal size measured is
<quantity id="36039B4CE4515512D2B474977073FD43" box="[722,823,722,748]" metricMagnitude="-2" metricUnit="m" metricValue="2.61" pageId="6" pageNumber="153" unit="mm" value="26.1">26.1 mm</quantity>
, coinciding with previous reports by
<bibRefCitation id="956A4B58E4515512D4B3749773A1FCBF" author="Kaas, P. &amp; Van Belle, R." pageId="6" pageNumber="153" refId="ref18667" refString="Kaas, P. &amp; Van Belle, R. (1990) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 4. Suborder Ischnochitonina: Ischnochitonidae: Ischnochitoninae. E. J. Brill, Leiden, 298 pp. https: // doi. org / 10.1163 / 9789004431706" type="book" year="1990">Kaas &amp; Van Belle (1990)</bibRefCitation>
.
</paragraph>
<paragraph id="F14436A9E4515512D0A1755F7703FCF7" blockId="6.[151,1437,325,856]" pageId="6" pageNumber="153">
<taxonomicName id="36FB4D2AE4515512D0A1755F729FFC9B" authorityName="Pilsbry" authorityYear="1893" box="[199,475,794,820]" class="Polyplacophora" family="Ischnochitonidae" genus="Ischnochiton" kingdom="Animalia" order="Chitonida" pageId="6" pageNumber="153" phylum="Mollusca" rank="species" species="tridentatus">
<emphasis id="C38FEABBE4515512D0A1755F729FFC9B" box="[199,475,794,820]" italics="true" pageId="6" pageNumber="153">Ischnochiton tridentatus</emphasis>
</taxonomicName>
is endemic to the Gulf of
<collectingRegion id="333FF84BE4515512D373755F70CEFC9B" box="[789,906,794,820]" country="United States of America" name="California" pageId="6" pageNumber="153">California</collectingRegion>
. In our surveys, it was common to find small (maybe juveniles) and adult specimens cohabiting at beaches with low wave energy.
</paragraph>
</subSubSection>
</treatment>
</document>