123 lines
17 KiB
XML
123 lines
17 KiB
XML
<document id="979EA7512756A7E63B7D253B4D9C57BD" ID-DOI="10.5281/zenodo.13620385" ID-ISSN="1732-2421" ID-Zenodo-Dep="13620385" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" IM.treatmentCitations_approvedBy="felipe" IM.treatments_approvedBy="karina" checkinTime="1723143568114" checkinUser="felipe" docAuthor="Ahlberg, Per, Szaniawski, Hubert, Clarkson, Euan N. K. & Bengtson, Stefan" docDate="2005" docId="315A9976FFA2FFEEFF9C5DC8FC92FD53" docLanguage="en" docName="ActaPalaeontolPol.50.3.429-440.pdf" docOrigin="Acta Palaeontologica Polonica 50 (3)" docStyle="DocumentStyle:93F5927C23D90727DE855278A6F17B37.1:ActaPalaeontolPol.2002-2009.journal_article" docStyleId="93F5927C23D90727DE855278A6F17B37" docStyleName="ActaPalaeontolPol.2002-2009.journal_article" docStyleVersion="1" docTitle="Sphaerophthalmus alatus" docType="treatment" docVersion="3" lastPageNumber="433" masterDocId="CD63E10EFFA6FFEAFFFA5E0DFFF5FFDC" masterDocTitle="Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Västergötland, Sweden" masterLastPageNumber="440" masterPageNumber="429" pageNumber="433" updateTime="1725042222256" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:titleInfo id="36D691BFBD971EC384D459DF463FF4A9">
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<mods:title id="3D69E70AFD15248BF1AB60A5D9CD17BC">Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Västergötland, Sweden</mods:title>
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<mods:namePart id="6FFF08194A7F34253653A0BE2E2BD8C1">Ahlberg, Per</mods:namePart>
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<mods:namePart id="427E5A929CC10DD2D217F082DD9C0774">Szaniawski, Hubert</mods:namePart>
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<mods:roleTerm id="41150BA8CC9A92C151786774DFE540A4">Author</mods:roleTerm>
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<mods:namePart id="B5D188D394D7B9B0AD2FFBBC17987ED5">Clarkson, Euan N. K.</mods:namePart>
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<mods:name id="17F0C0E2B64F2FFEC0D6F436834641EB" type="personal">
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<mods:roleTerm id="108AEB246C4014CDED8BB8D8901A3F2E">Author</mods:roleTerm>
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<mods:namePart id="FB7C380249AA6103D94CD9FA57FF6291">Bengtson, Stefan</mods:namePart>
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<mods:typeOfResource id="3C0CFC8CDD792C30BC155A0DD8B1CF64">text</mods:typeOfResource>
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<mods:title id="C40FDA93E8D10CC8152C3FB711FAED40">Acta Palaeontologica Polonica</mods:title>
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</mods:titleInfo>
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<mods:part id="02EF024FC2D810930C9216CF635303C6">
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<mods:date id="5F8AF478FA6105D7C691B697E60DD32E">2005</mods:date>
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<mods:detail id="3DC89157C1957933C787EA5CCFF848DF" type="volume">
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<mods:number id="AE998FD8E05AB953812C8C8273E1E39C">50</mods:number>
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<mods:number id="53B5698CA08316171794B3D93F5F2ACF">3</mods:number>
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<mods:start id="591A908511803EEA04D9362CC4182CBC">429</mods:start>
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<mods:end id="F2DDAD5F38309ACAAE273D3469D52EA4">440</mods:end>
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<mods:identifier id="5F75B023F53B52186438193FF587B9ED" type="DOI">10.5281/zenodo.13620385</mods:identifier>
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<mods:identifier id="91F4A8408C7A8F59E58210F1D6F40F51" type="ISSN">1732-2421</mods:identifier>
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<mods:identifier id="52856DF9C6E8BDD34E9A84BDD6194D4B" type="Zenodo-Dep">13620385</mods:identifier>
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<treatment id="315A9976FFA2FFEEFF9C5DC8FC92FD53" ID-DOI="http://doi.org/10.5281/zenodo.13620549" ID-Zenodo-Dep="13620549" LSID="urn:lsid:plazi:treatment:315A9976FFA2FFEEFF9C5DC8FC92FD53" httpUri="http://treatment.plazi.org/id/315A9976FFA2FFEEFF9C5DC8FC92FD53" lastPageNumber="433" pageId="4" pageNumber="433">
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<subSubSection id="F1E97BEBFFA2FFEEFF9C5DC8FD66FC3D" box="[102,659,965,993]" pageId="4" pageNumber="433" type="nomenclature">
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<paragraph id="B94C2860FFA2FFEEFF9C5DC8FD66FC3D" blockId="4.[102,659,965,1025]" box="[102,659,965,993]" pageId="4" pageNumber="433">
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<heading id="E2049F0CFFA2FFEEFF9C5DC8FD66FC3D" box="[102,659,965,993]" fontSize="12" level="2" pageId="4" pageNumber="433" reason="9">
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<taxonomicName id="7EF353E3FFA2FFEEFF9C5DC8FD66FC3D" ID-CoL="4YRFF" authority="(Boeck, 1838)" baseAuthorityName="Boeck" baseAuthorityYear="1838" box="[102,659,965,993]" class="Trilobita" family="Olenidae" genus="Sphaerophthalmus" isUncertain="true" kingdom="Animalia" order="Ptychopariida" pageId="4" pageNumber="433" phylum="Arthropoda" rank="species" species="alatus">
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<emphasis id="8B87F472FFA2FFEEFF9C5DC8FEA3FC3D" box="[102,342,965,993]" italics="true" pageId="4" pageNumber="433">Sphaerophthalmus</emphasis>
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cf.
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<emphasis id="8B87F472FFA2FFEEFE7C5DC8FE21FC3D" box="[390,468,965,993]" italics="true" pageId="4" pageNumber="433">alatus</emphasis>
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(
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<bibRefCitation id="DD625591FFA2FFEEFE1F5DC8FD7EFC3D" author="Boeck, C." box="[485,651,965,993]" pageId="4" pageNumber="433" pagination="138 - 145" refId="ref8912" refString="Boeck, C. 1838. Uebersicht der bisher in Norwegen gefundenen Formen der Trilobiten. In: B. M. Keilhau (ed.), Gaea Norvegica, 138 - 145. Johan Dahl, Christiania (Oslo)." type="book chapter" year="1838">Boeck, 1838</bibRefCitation>
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)
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</taxonomicName>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="F1E97BEBFFA2FFEEFF9C5DE1FD68F8CA" pageId="4" pageNumber="433" type="description">
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<paragraph id="B94C2860FFA2FFEEFF9C5DE1FF20FBDD" blockId="4.[102,659,965,1025]" box="[102,213,1004,1025]" pageId="4" pageNumber="433">
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<figureCitation id="21C834E5FFA2FFEEFF9C5DE1FF25FBDD" box="[102,208,1004,1025]" captionStart="Fig" captionStartId="3.[102,134,1806,1826]" captionTargetBox="[102,1485,228,1777]" captionTargetId="figure-8@3.[102,1486,228,1777]" captionTargetPageId="3" captionText="Fig. 2. A. Parabolina sp., juvenile pygidium, SMNH Ar59711 (3.13), sample 2. B–H. Ctenopyge sp. B. Fragmentary cranidium, SMNH Ar59712 (2.8), sample 2. C. Left librigena with intact eye, SMNH Ar59713 (1.12), sample 1. D. Left librigena with intact eye, SMNH Ar59714 (1.13), sample 1. E. Small pygidium, SMNH Ar59715 (1.23), sample 1. F. Pygidium, SMNH Ar59716 (2.6), sample 2. G. Pygidium, SMNH A59717 (2.2), sample 2. H. Pygidium, SMNH Ar59718 (1.4), sample 1. I–K. Sphaerophthalmus humilis (Phillips, 1848). I. Cranidium, SMNH Ar59719 (2.20), sample 2. J. Pygidium, SMNH 59720 (1.5), sample 1. K. Pygidium, SMNH Ar59721(2.5), sample 2. L, M. Sphaerophthalmus cf. alatus (Boeck, 1838). L. Right librigena with intact eye, SMNH Ar59722 (1.20), sample 1. M. Left librigena, SMNH Ar59723 (1.14), sample 1. N, O. Sphaerophthalmus cf. majusculus Linnarsson, 1880. N. Pygidium, SMNH Ar59724 (1.15), sample 2. O. Pygidium, SMNH Ar59725 (2.1), sample 2. P. Sphaerophthalmus sp. A?, juvenile cranidium, SMNH Ar59726 (2.11), sample 2. Q–R. Sphaerophthalmus sp. A, sample 1. Q. Cranidium, SMNH Ar59727 (1.8). R. Cranidium, SMNH Ar59728 (1.10). Scale bars 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.13620389" httpUri="https://zenodo.org/record/13620389/files/figure.png" pageId="4" pageNumber="433">Fig. 2L, M</figureCitation>
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.
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</paragraph>
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<paragraph id="B94C2860FFA2FFEEFF9C5A18FD6FFBF1" blockId="4.[102,666,1044,1069]" box="[102,666,1044,1069]" pageId="4" pageNumber="433">
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<emphasis id="8B87F472FFA2FFEEFF9C5A18FF3DFBF1" box="[102,200,1045,1069]" italics="true" pageId="4" pageNumber="433">Material</emphasis>
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.—Two librigenae, one left and one right.
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</paragraph>
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<paragraph id="B94C2860FFA2FFEEFF9C5A33FDAEF98A" blockId="4.[102,775,1085,1814]" pageId="4" pageNumber="433">
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<emphasis id="8B87F472FFA2FFEEFF9C5A33FF12FB89" box="[102,231,1086,1109]" italics="true" pageId="4" pageNumber="433">Description</emphasis>
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.—Nearly intact left and right librigena (1.2 and
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<quantity id="7E0B8585FFA2FFEEFF9C5A50FF4CFBA9" box="[102,185,1117,1142]" metricMagnitude="-4" metricUnit="m" metricValue="7.0" pageId="4" pageNumber="433" unit="mm" value="0.7">0.7 mm</quantity>
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long respectively), the latter with an intact eye, probably belong to this species. They are very narrow, curving and tapering anteriorly, and with the eyes set in the posterior third, where the librigena is widest. Long genal spines (broken) emerge from a level opposite the eye at an angle of 70–80
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<emphasis id="8B87F472FFA2FFEEFD1A5AD1FD1EFB33" box="[736,747,1244,1263]" italics="true" pageId="4" pageNumber="433">°</emphasis>
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to the sagittal line. The postero−lateral margin between the spine and the facial suture is almost straight and very short, less than the length of the eye. The antero−lateral margin in front of the spine is three to four times as long as the postero−lateral margin. It is almost straight laterally and then curves forwards and inwards to terminate very sharply against the facial suture. The anterior branch of the facial suture is almost straight anteriorly, and then slightly curved to meet the eye, where it curves sharply inwards and outwards again, encompassing the rear part of the eye. The posterior branch is short and curves slightly inwards to meet the posterior margin.
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</paragraph>
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<paragraph id="B94C2860FFA2FFEEFF765850FD68F8CA" blockId="4.[102,775,1085,1814]" pageId="4" pageNumber="433">
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The eye is ovoid, slightly expanded posteriorly, and provided with about 50 thin lenses, which are slightly larger towards the rear. The librigenae are very small and clearly belong to juvenile specimens, and the eyes have fewer lenses and are more elongated than in adult specimens from Andrarum,
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<collectingRegion id="7B37E682FFA2FFEEFF9C58F0FF47F8CA" box="[102,178,1789,1814]" country="Sweden" name="Skane" pageId="4" pageNumber="433">Scania</collectingRegion>
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, southern
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<collectingCountry id="C1E468F0FFA2FFEEFED858F0FE8CF8CA" box="[290,377,1789,1814]" name="Sweden" pageId="4" pageNumber="433">Sweden</collectingCountry>
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(see
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<bibRefCitation id="DD625591FFA2FFEEFE4958F0FD64F8CA" author="Clarkson, E. N. K." box="[435,657,1789,1814]" pageId="4" pageNumber="433" pagination="735 - 763" refId="ref9062" refString="Clarkson, E. N. K. 1973. Morphology and evolution of the eye in Upper Cambrian Olenidae (Trilobita). Palaeontology 16: 735 - 763." type="journal article" year="1973">Clarkson 1973: 756</bibRefCitation>
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).
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</paragraph>
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</subSubSection>
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<subSubSection id="F1E97BEBFFA2FFEEFF9C5937FF26F8AA" pageId="4" pageNumber="433" type="reference_group">
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<paragraph id="B94C2860FFA2FFEEFF9C5937FF26F8AA" blockId="4.[102,765,1849,1910]" pageId="4" pageNumber="433">
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<taxonomicName id="7EF353E3FFA2FFEEFF9C5937FD08F889" ID-CoL="4YRFM" authority="Linnarsson, 1880" authorityName="Linnarsson" authorityYear="1880" box="[102,765,1849,1878]" class="Trilobita" family="Olenidae" genus="Sphaerophthalmus" isUncertain="true" kingdom="Animalia" order="Ptychopariida" pageId="4" pageNumber="433" phylum="Arthropoda" rank="species" species="majusculus">
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<emphasis id="8B87F472FFA2FFEEFF9C5937FEA3F88A" box="[102,342,1850,1878]" italics="true" pageId="4" pageNumber="433">Sphaerophthalmus</emphasis>
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cf.
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<emphasis id="8B87F472FFA2FFEEFE7C5937FDE3F88A" box="[390,534,1850,1878]" italics="true" pageId="4" pageNumber="433">majusculus</emphasis>
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<bibRefCitation id="DD625591FFA2FFEEFDE45934FD08F889" author="Linnarsson, G." box="[542,765,1849,1877]" pageId="4" pageNumber="433" pagination="132 - 161" refId="ref9484" refString="Linnarsson, G. 1880. Om forsteningarne i de svenska lagren med Peltura och Sphaerophthalmus. Geologiska Foreningens i Stockholm Forhandlingar 5: 132 - 161." type="journal article" year="1880">Linnarsson, 1880</bibRefCitation>
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</taxonomicName>
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<figureCitation id="21C834E5FFA2FFEEFF9C596CFF3AF8AA" box="[102,207,1889,1910]" captionStart="Fig" captionStartId="3.[102,134,1806,1826]" captionTargetBox="[102,1485,228,1777]" captionTargetId="figure-8@3.[102,1486,228,1777]" captionTargetPageId="3" captionText="Fig. 2. A. Parabolina sp., juvenile pygidium, SMNH Ar59711 (3.13), sample 2. B–H. Ctenopyge sp. B. Fragmentary cranidium, SMNH Ar59712 (2.8), sample 2. C. Left librigena with intact eye, SMNH Ar59713 (1.12), sample 1. D. Left librigena with intact eye, SMNH Ar59714 (1.13), sample 1. E. Small pygidium, SMNH Ar59715 (1.23), sample 1. F. Pygidium, SMNH Ar59716 (2.6), sample 2. G. Pygidium, SMNH A59717 (2.2), sample 2. H. Pygidium, SMNH Ar59718 (1.4), sample 1. I–K. Sphaerophthalmus humilis (Phillips, 1848). I. Cranidium, SMNH Ar59719 (2.20), sample 2. J. Pygidium, SMNH 59720 (1.5), sample 1. K. Pygidium, SMNH Ar59721(2.5), sample 2. L, M. Sphaerophthalmus cf. alatus (Boeck, 1838). L. Right librigena with intact eye, SMNH Ar59722 (1.20), sample 1. M. Left librigena, SMNH Ar59723 (1.14), sample 1. N, O. Sphaerophthalmus cf. majusculus Linnarsson, 1880. N. Pygidium, SMNH Ar59724 (1.15), sample 2. O. Pygidium, SMNH Ar59725 (2.1), sample 2. P. Sphaerophthalmus sp. A?, juvenile cranidium, SMNH Ar59726 (2.11), sample 2. Q–R. Sphaerophthalmus sp. A, sample 1. Q. Cranidium, SMNH Ar59727 (1.8). R. Cranidium, SMNH Ar59728 (1.10). Scale bars 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.13620389" httpUri="https://zenodo.org/record/13620389/files/figure.png" pageId="4" pageNumber="433">Fig. 2N, O</figureCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="F1E97BEBFFA2FFEEFF9C5984FC92FD53" pageId="4" pageNumber="433" type="materials_examined">
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<paragraph id="B94C2860FFA2FFEEFF9C5984FD83F87E" blockId="4.[102,774,1929,2026]" box="[102,630,1929,1954]" pageId="4" pageNumber="433">
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<emphasis id="8B87F472FFA2FFEEFF9C5984FF3DF87D" box="[102,200,1929,1953]" italics="true" pageId="4" pageNumber="433">Material</emphasis>
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.—Two pygidia, 0.6 and
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<quantity id="7E0B8585FFA2FFEEFE1A5984FDC3F87D" box="[480,566,1929,1954]" metricMagnitude="-4" metricUnit="m" metricValue="8.0" pageId="4" pageNumber="433" unit="mm" value="0.8">0.8 mm</quantity>
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long.
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</paragraph>
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<paragraph id="B94C2860FFA2FFEEFF9C59BFFC92FD53" blockId="4.[102,774,1929,2026]" lastBlockId="4.[812,1485,232,655]" pageId="4" pageNumber="433">
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<emphasis id="8B87F472FFA2FFEEFF9C59BFFF1FF815" box="[102,234,1970,1993]" italics="true" pageId="4" pageNumber="433">Description</emphasis>
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.—The pygidia are subtriangular, wider than long, and with the postero−lateral margins slightly concave and a somewhat rounded posterior end. The axis occupies slightly more than the central third of the total width anteriorly, tapers regularly backwards and almost reaches the posterior border. It consists of an articulating half−ring, three axial rings, and a terminal piece. The pleural fields become distinctly narrower backwards and have two or three shallow pleural furrows. The pygidial border is raised and continuous, lacking undulations, and provided with several distinct, subparallel terrace lines. The pygidial surface lacks distinct ornamentation other than the terrace lines and some faint granulation on the central part of the axial rings, and, on the larger specimen (
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<figureCitation id="21C834E5FFA2FFEEFC145C59FBB2FDB1" box="[1006,1095,596,621]" captionStart="Fig" captionStartId="3.[102,134,1806,1826]" captionTargetBox="[102,1485,228,1777]" captionTargetId="figure-8@3.[102,1486,228,1777]" captionTargetPageId="3" captionText="Fig. 2. A. Parabolina sp., juvenile pygidium, SMNH Ar59711 (3.13), sample 2. B–H. Ctenopyge sp. B. Fragmentary cranidium, SMNH Ar59712 (2.8), sample 2. C. Left librigena with intact eye, SMNH Ar59713 (1.12), sample 1. D. Left librigena with intact eye, SMNH Ar59714 (1.13), sample 1. E. Small pygidium, SMNH Ar59715 (1.23), sample 1. F. Pygidium, SMNH Ar59716 (2.6), sample 2. G. Pygidium, SMNH A59717 (2.2), sample 2. H. Pygidium, SMNH Ar59718 (1.4), sample 1. I–K. Sphaerophthalmus humilis (Phillips, 1848). I. Cranidium, SMNH Ar59719 (2.20), sample 2. J. Pygidium, SMNH 59720 (1.5), sample 1. K. Pygidium, SMNH Ar59721(2.5), sample 2. L, M. Sphaerophthalmus cf. alatus (Boeck, 1838). L. Right librigena with intact eye, SMNH Ar59722 (1.20), sample 1. M. Left librigena, SMNH Ar59723 (1.14), sample 1. N, O. Sphaerophthalmus cf. majusculus Linnarsson, 1880. N. Pygidium, SMNH Ar59724 (1.15), sample 2. O. Pygidium, SMNH Ar59725 (2.1), sample 2. P. Sphaerophthalmus sp. A?, juvenile cranidium, SMNH Ar59726 (2.11), sample 2. Q–R. Sphaerophthalmus sp. A, sample 1. Q. Cranidium, SMNH Ar59727 (1.8). R. Cranidium, SMNH Ar59728 (1.10). Scale bars 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.13620389" httpUri="https://zenodo.org/record/13620389/files/figure.png" pageId="4" pageNumber="433">Fig. 2O</figureCitation>
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), on the anterior part of the pleural field.
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |