144 lines
16 KiB
XML
144 lines
16 KiB
XML
<document id="AC11212044D9DC9F1D9D31BC3A712A8B" ID-CLB-Dataset="36828" ID-DOI="10.11646/zootaxa.3824.1.1" ID-GBIF-Dataset="df227efc-13d9-421e-92ed-f9aa417b0cf7" ID-ISSN="1175-5326" ID-Zenodo-Dep="286404" ID-ZooBank="023D78D0-4182-48D2-BAEB-CDA6473CF585" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460443577100" checkinUser="plazi" docAuthor="Webster, Mark & Bohach, Lisa L." docDate="2014" docId="B10C8793FFCEFFBC61B5FB86FCB8821C" docLanguage="en" docName="zt03824p066.pdf" docOrigin="Zootaxa 3824 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Lochmanolenellus subquadratus" docType="treatment" docVersion="6" lastPageNumber="53" masterDocId="4D35FFEBFFFDFF886122FFE2FFE18379" masterDocTitle="Systematic revision of the trilobite genera Laudonia and Lochmanolenellus (Olenelloidea) from the lower Dyeran (Cambrian Series 2) of western Laurentia" masterLastPageNumber="66" masterPageNumber="1" pageNumber="52" updateTime="1698333190807" updateUser="ExternalLinkService">
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<mods:mods id="3BC48B7FAB20CE8BC7204798DF9022D2" xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo id="DB1BA1E0B6EA88B967FA2397878079A0">
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<mods:title id="5D6D99AF044D6A01F57A1ABBD5FECA87">Systematic revision of the trilobite genera Laudonia and Lochmanolenellus (Olenelloidea) from the lower Dyeran (Cambrian Series 2) of western Laurentia</mods:title>
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</mods:titleInfo>
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<mods:name id="F78C9522F7AE4B1D31C754C9E1F17DA8" type="personal">
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<mods:role id="DC997FB0B47B43460738CFAB67A82622">
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<mods:roleTerm id="84966C98561E1D2E644D22715351D4C9">Author</mods:roleTerm>
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<mods:namePart id="B3DEA975E8DDB9AAC710010011D5D095">Webster, Mark</mods:namePart>
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</mods:name>
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<mods:name id="63CA274AEB7E27C203D0B5F1D5B814A0" type="personal">
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<mods:role id="9E2D148895EECBF69874445C64BC69A7">
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<mods:roleTerm id="367E82E6BC4B8AE70ADCA760125BEF4C">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="0CC0BC21E8F58DC3660BB1C442506FB1">Bohach, Lisa L.</mods:namePart>
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</mods:name>
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<mods:typeOfResource id="2F9078E633A0E10DE71B64012DD4E612">text</mods:typeOfResource>
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<mods:relatedItem id="C3E7858E6E82E0B6502D2B78AD3F3776" type="host">
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<mods:titleInfo id="1276806E7E0D1E9124CB61C377223AAF">
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<mods:title id="7BA645D212E2329D48878F509D2DD327">Zootaxa</mods:title>
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</mods:titleInfo>
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<mods:part id="5CA84DF688E1AEB015BC68BC0E56104A">
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<mods:date id="2122B98F6183417607C13A9D8D1EF981">2014</mods:date>
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<mods:detail id="D65609B3AAEBEEDC80ED7BAED7F6ED08" type="volume">
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<mods:number id="95E68833A84E26500A458990B9103E1C">3824</mods:number>
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</mods:detail>
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<mods:detail id="077B35C23BAC6972A7B3288F521B0D48" type="issue">
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<mods:number id="0A01AB68E3F3281A81123B233FD12BD1">1</mods:number>
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</mods:detail>
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<mods:start id="4DEDD3CA9A29175463A7E2889E061250">1</mods:start>
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<mods:end id="93AAE46A8335FC0CAF258346629B0FC0">66</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:classification id="B953A3DC06E9339D0FFECF18376297CF">journal article</mods:classification>
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<mods:identifier id="DBB515366BA1E56A16D9FE072EA4F1D7" type="CLB-Dataset">36828</mods:identifier>
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<mods:identifier id="839DDA4A4191DC2E25A413C9E3165FE3" type="DOI">10.11646/zootaxa.3824.1.1</mods:identifier>
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<mods:identifier id="2DA6BD77A9A1ED14F99635BBBCAC091E" type="GBIF-Dataset">df227efc-13d9-421e-92ed-f9aa417b0cf7</mods:identifier>
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<mods:identifier id="AB63C4643F058C3288D8972AB0765880" type="ISSN">1175-5326</mods:identifier>
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<mods:identifier id="91BFBB6E6C0E1F8F8B3AD6D6209F10E4" type="Zenodo-Dep">286404</mods:identifier>
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<mods:identifier id="C9A491E8D5BFE409BAC854DE58C87E13" type="ZooBank">023D78D0-4182-48D2-BAEB-CDA6473CF585</mods:identifier>
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</mods:mods>
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<treatment id="B10C8793FFCEFFBC61B5FB86FCB8821C" ID-DOI="http://doi.org/10.5281/zenodo.6129734" ID-GBIF-Taxon="127668560" ID-Zenodo-Dep="6129734" LSID="urn:lsid:plazi:treatment:B10C8793FFCEFFBC61B5FB86FCB8821C" httpUri="http://treatment.plazi.org/id/B10C8793FFCEFFBC61B5FB86FCB8821C" lastPageId="52" lastPageNumber="53" pageId="51" pageNumber="52">
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<subSubSection id="71BF650EFFCEFFBB61B5FB86FDCF865B" pageId="51" pageNumber="52" type="nomenclature">
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<paragraph id="391A3685FFCEFFBB61B5FB86FDBE8707" blockId="51.[151,607,1124,1183]" box="[151,607,1124,1150]" pageId="51" pageNumber="52">
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<heading id="625281E9FFCEFFBB61B5FB86FDBE8707" bold="true" box="[151,607,1124,1150]" fontSize="11" level="1" pageId="51" pageNumber="52" reason="1">
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<emphasis id="0BD1EA97FFCEFFBB61B5FB86FDBE8707" bold="true" box="[151,607,1124,1150]" pageId="51" pageNumber="52">
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<taxonomicName id="FEA54D06FFCEFFBB61B5FB86FDA98707" box="[151,584,1124,1150]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFCEFFBB61B5FB86FE998707" bold="true" box="[151,376,1124,1150]" italics="true" pageId="51" pageNumber="52">Lochmanolenellus</emphasis>
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cf.
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<emphasis id="0BD1EA97FFCEFFBB6086FB86FDA98707" bold="true" box="[420,584,1124,1150]" italics="true" pageId="51" pageNumber="52">subquadratus</emphasis>
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</taxonomicName>
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1
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</emphasis>
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</heading>
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</paragraph>
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<paragraph id="391A3685FFCEFFBB61B5FB64FF1A87E6" blockId="51.[151,607,1124,1183]" box="[151,251,1158,1183]" pageId="51" pageNumber="52">Fig. 19.1</paragraph>
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<paragraph id="391A3685FFCEFFBB61B5FB2CFD7F879D" blockId="51.[151,1436,1230,1314]" box="[151,670,1230,1252]" pageId="51" pageNumber="52">
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1966
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<emphasis id="0BD1EA97FFCEFFBB61F2FB2CFED0879D" box="[208,305,1230,1252]" italics="true" pageId="51" pageNumber="52">Laudonia</emphasis>
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sp.; Nelson & Durham, pl. 2, fig. 9.
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</paragraph>
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<paragraph id="391A3685FFCEFFBB61B5FB0FFDCF865B" blockId="51.[151,1436,1230,1314]" pageId="51" pageNumber="52">
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1976
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<emphasis id="0BD1EA97FFCEFFBB61EDFB0FFED1867A" box="[207,304,1261,1283]" italics="true" pageId="51" pageNumber="52">Laudonia</emphasis>
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sp.; Nelson (part), pl. 5, top right and lower left “
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<emphasis id="0BD1EA97FFCEFFBB6204FB0FFC66867A" box="[806,903,1261,1283]" italics="true" pageId="51" pageNumber="52">Laudonia</emphasis>
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” specimens only [not top left “
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<emphasis id="0BD1EA97FFCEFFBB65E6FB0FFAC4867A" box="[1220,1317,1261,1283]" italics="true" pageId="51" pageNumber="52">Laudonia</emphasis>
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” specimen, =
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<taxonomicName id="FEA54D06FFCEFFBB61F9FAEEFDFE865B" box="[219,543,1292,1314]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="trapezoidalis">
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<emphasis id="0BD1EA97FFCEFFBB61F9FAEEFDFE865B" box="[219,543,1292,1314]" italics="true" pageId="51" pageNumber="52">Lochmanolenellus trapezoidalis</emphasis>
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</taxonomicName>
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].
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</paragraph>
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</subSubSection>
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<subSubSection id="71BF650EFFCEFFBB61B5FAACFA7D858A" pageId="51" pageNumber="52" type="materials_examined">
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<paragraph id="391A3685FFCEFFBB61B5FAACFD578562" blockId="51.[151,1436,1358,2031]" pageId="51" pageNumber="52">
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<emphasis id="0BD1EA97FFCEFFBB61B5FAACFEE7861E" bold="true" box="[151,262,1358,1383]" pageId="51" pageNumber="52">Material.</emphasis>
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Two of the three specimens illustrated as “
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<emphasis id="0BD1EA97FFCEFFBB623CFAACFC68861F" box="[798,905,1358,1382]" italics="true" pageId="51" pageNumber="52">Laudonia</emphasis>
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” by
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<bibRefCitation id="5D344B74FFCEFFBB62EFFAACFB8F861E" author="Nelson" box="[973,1134,1358,1383]" pageId="51" pageNumber="52" refString="Nelson, C. A. (1976) Late Precambrian-Early Cambrian stratigraphic and faunal succession of eastern California and the Precambrian-Cambrian boundary. In: Moore, J. N. & Fritsche, A. E. (Eds.), Depositional environments of Lower Paleozoic rocks in the White-Inyo Mountains, Inyo County, California. Pacific Coast Paleogeography Field Guide, 1, pp. 31 - 42." type="journal article" year="1976">Nelson (1976</bibRefCitation>
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, top right and lower left specimens only; one of which was also illustrated by
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<bibRefCitation id="5D344B74FFCEFFBB63CBFA90FBE186F2" author="Nelson" box="[745,1024,1394,1419]" pageId="51" pageNumber="52" refString="Nelson, C. & Durham, J. W. (1966) Guidebook for field trip to Precambrian-Cambrian succession, White-Inyo Mountains, California. Geological Society of America, Guidebook, 1966 Annual Meeting at San Francisco, California, 17 pp., 5 pls." type="book" year="1966">Nelson & Durham, 1966</bibRefCitation>
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, pl. 2, fig. 9) are herein reassigned to
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<taxonomicName id="FEA54D06FFCEFFBB61B5FA74FDCD86D7" box="[151,556,1430,1455]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFCEFFBB61B5FA74FE8586D7" box="[151,356,1430,1454]" italics="true" pageId="51" pageNumber="52">Lochmanolenellus</emphasis>
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cf.
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<emphasis id="0BD1EA97FFCEFFBB60B1FA74FDCD86D7" box="[403,556,1430,1454]" italics="true" pageId="51" pageNumber="52">subquadratus</emphasis>
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</taxonomicName>
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1. Quantitative morphometric and qualitative descriptive data were recorded from first-hand examination of one of those specimens (LACMIP 7401); the whereabouts of the second specimen is unknown (M. Stecheson, personal communication to M. Webster,
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<date id="4D1B1045FFCEFFBB62EDFA3CFB80868E" box="[975,1121,1502,1527]" pageId="51" pageNumber="52" value="2012-03">March 2012</date>
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), and it therefore was not examined during the course of the present study.
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</paragraph>
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<paragraph id="391A3685FFCEFFBB61E5F9C4FA7D858A" blockId="51.[151,1436,1358,2031]" pageId="51" pageNumber="52">
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<emphasis id="0BD1EA97FFCEFFBB61E5F9C4FEB88546" bold="true" box="[199,345,1574,1599]" pageId="51" pageNumber="52">Occurrence.</emphasis>
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<collectingCountry id="41B27615FFCEFFBB6043F9C5FE538546" box="[353,434,1575,1599]" name="United States of America" pageId="51" pageNumber="52">U.S.A.</collectingCountry>
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:
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<emphasis id="0BD1EA97FFCEFFBB609CF9C4FC138547" box="[446,1010,1574,1598]" italics="true" pageId="51" pageNumber="52">Magruder Mountain, Esmeralda County, Nevada:</emphasis>
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Upper portion of the middle member of the Poleta Formation at LACMIP locality 26828, SW ¼, SW ¼, SW ¼ of Section 22, T6S, R40E. The second specimen, illustrated by
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<bibRefCitation id="5D344B74FFCEFFBB608CF98CFC6685FE" author="Nelson" box="[430,903,1646,1671]" pageId="51" pageNumber="52" refString="Nelson, C. A. (1976) Late Precambrian-Early Cambrian stratigraphic and faunal succession of eastern California and the Precambrian-Cambrian boundary. In: Moore, J. N. & Fritsche, A. E. (Eds.), Depositional environments of Lower Paleozoic rocks in the White-Inyo Mountains, Inyo County, California. Pacific Coast Paleogeography Field Guide, 1, pp. 31 - 42." type="journal article" year="1976">Nelson (1976, pl. 5, lower left specimen)</bibRefCitation>
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, was collected from the middle member of the Poleta Formation in either Esmeralda County, Nevada, or Inyo County, eastern California, but more precise details of geographic and stratigraphic provenance for this specimen are unknown. Both occurrences are assumed to be in the lower portion of the Dyeran Stage, Waucoban Series based on the range chart provided by
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<bibRefCitation id="5D344B74FFCEFFBB658FF938FA79858A" author="Nelson" box="[1197,1432,1754,1779]" pageId="51" pageNumber="52" refString="Nelson, C. A. (1976) Late Precambrian-Early Cambrian stratigraphic and faunal succession of eastern California and the Precambrian-Cambrian boundary. In: Moore, J. N. & Fritsche, A. E. (Eds.), Depositional environments of Lower Paleozoic rocks in the White-Inyo Mountains, Inyo County, California. Pacific Coast Paleogeography Field Guide, 1, pp. 31 - 42." type="journal article" year="1976">Nelson (1976, fig. 5)</bibRefCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="71BF650EFFCEFFBC61E5F91CFCB8821C" lastPageId="52" lastPageNumber="53" pageId="51" pageNumber="52" type="discussion">
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<paragraph id="391A3685FFCEFFBC61E5F91CFCCC83AD" blockId="51.[151,1436,1358,2031]" lastBlockId="52.[151,1436,151,357]" lastPageId="52" lastPageNumber="53" pageId="51" pageNumber="52">
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<emphasis id="0BD1EA97FFCEFFBB61E5F91CFEAD846E" bold="true" box="[199,332,1790,1815]" pageId="51" pageNumber="52">Discussion.</emphasis>
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The two specimens show the subquadrate cephalic outline, strongly anteriorly advanced genal spine bases, and ocular lobe length (posterior tip located transversely opposite the lateral margin of L1) typical of
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<taxonomicName id="FEA54D06FFCEFFBB61B5F8A4FDE78427" box="[151,518,1862,1886]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFCEFFBB61B5F8A4FDE78427" box="[151,518,1862,1886]" italics="true" pageId="51" pageNumber="52">Lochmanolenellus subquadratus</emphasis>
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</taxonomicName>
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. Both exhibit genal and intergenal spines that are slightly less strongly laterally flared relative to the typical condition for this species, but this probably results from the slight tectonic deformation experienced by both specimens. The broader anterior cephalic border of one of the specimens (Fig. 19.1) relative to
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<taxonomicName id="FEA54D06FFCEFFBB61B5F851FEBD84B2" box="[151,348,1971,1995]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFCEFFBB61B5F851FEBD84B2" box="[151,348,1971,1995]" italics="true" pageId="51" pageNumber="52">Lo. subquadratus</emphasis>
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</taxonomicName>
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is probably attributable to a combination of tectonic deformation plus taphonomic compaction (this specimen is preserved in shale, all other specimens of
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<taxonomicName id="FEA54D06FFCEFFBB6208F835FC0D8497" box="[810,1004,2006,2030]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="51" pageNumber="52" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFCEFFBB6208F835FC0D8497" box="[810,1004,2006,2030]" italics="true" pageId="51" pageNumber="52">Lo. subquadratus</emphasis>
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</taxonomicName>
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are preserved in limestone). Given the preservational differences, assignment of these two specimens to
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<taxonomicName id="FEA54D06FFC9FFBC6250FF7BFBD783C9" box="[882,1078,152,176]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="52" pageNumber="53" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFC9FFBC6250FF7BFBD783C9" box="[882,1078,152,176]" italics="true" pageId="52" pageNumber="53">Lo. subquadratus</emphasis>
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</taxonomicName>
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must remain tentative, and they are conservatively treated herein as
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<taxonomicName id="FEA54D06FFC9FFBC630BFF5FFCF183AD" box="[553,784,188,213]" class="Trilobita" family="Biceratopsidae" genus="Lochmanolenellus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Redlichiida" pageId="52" pageNumber="53" phylum="Arthropoda" rank="species" species="subquadratus">
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<emphasis id="0BD1EA97FFC9FFBC630BFF5FFDAF83AD" box="[553,590,189,212]" italics="true" pageId="52" pageNumber="53">Lo.</emphasis>
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cf.
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<emphasis id="0BD1EA97FFC9FFBC635AFF5EFCF183AD" box="[632,784,188,212]" italics="true" pageId="52" pageNumber="53">subquadratus</emphasis>
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</taxonomicName>
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1.
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</paragraph>
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<paragraph id="391A3685FFC9FFBC61E5FF3DFCB8821C" blockId="52.[151,1436,151,357]" pageId="52" pageNumber="53">
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The sagittal axis of LACMIP 7401 was oriented parallel to the major axis of the tectonic strain ellipse (as revealed by weak lineations within the shale matrix). This orientation relative to tectonic strain accounts for the unusually large length:width ratios evident on this specimen. The sagittal cephalic length of the specimen (
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<quantity id="FE5D9B60FFC9FFBC6448FECAFF25821D" metricMagnitude="-2" metricUnit="m" metricValue="1.41" pageId="52" pageNumber="53" unit="mm" value="14.1">14.1 mm</quantity>
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) might have been slightly exaggerated by the deformation.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |