190 lines
23 KiB
XML
190 lines
23 KiB
XML
<document id="6B606F5B0BF8A9FC5A9EE829D8159344" ID-DOI="10.11646/zootaxa.4804.1.1" ID-ISSN="1175-5326" ID-Zenodo-Dep="3927094" ID-ZooBank="8C1C1703-9BBC-4B33-8045-78BDD9738F51" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1593672611012" checkinUser="plazi" docAuthor="Westrop, Madison Armstrong Stephen R. & Eoff, Jennifer D." docDate="2020" docId="03F76D37FFB9FFDE6BD2E57AFD4F96C3" docLanguage="en" docName="zootaxa.4804.1.1.pdf" docOrigin="Zootaxa 4804 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Maryvillia triangularis" docType="treatment" docVersion="4" lastPageNumber="23" masterDocId="FFCE154FFFAFFFC86B45E438FF8E9206" masterDocTitle="Systematics of a survivor: the Cambrian kingstoniid trilobite Blountia Walcott, 1916 across the Marjuman-Steptoean (Guzhangian-Paibian) extinction interval in Laurentian North America" masterLastPageNumber="79" masterPageNumber="1" pageNumber="23" updateTime="1698776919363" updateUser="plazi">
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<mods:title id="6959A0662D1B06AD0269D5797C16A795">Systematics of a survivor: the Cambrian kingstoniid trilobite Blountia Walcott, 1916 across the Marjuman-Steptoean (Guzhangian-Paibian) extinction interval in Laurentian North America</mods:title>
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<mods:namePart id="3C98F365CD734469E6D766DDB3AE28DB">Westrop, Madison Armstrong Stephen R.</mods:namePart>
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<mods:namePart id="A9F0BF45B6F55CE41A1549C350A4A4A5">Eoff, Jennifer D.</mods:namePart>
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<mods:title id="88BBA85D61CF58EEA79E0669EA35668F">Zootaxa</mods:title>
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<mods:part id="F9A72596E94ED08417E3340A49ADE759">
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<mods:date id="86FAAD9DED7E7E8F2BA039B4D4CC760B">2020</mods:date>
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<mods:number id="855DB96A7749D75F2FE36AFA458327FC">2020-06-30</mods:number>
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<mods:number id="EBACC3C91872FABA2E1F5FE51624DA20">4804</mods:number>
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<mods:identifier id="7D90876BFA02D9690531B0C86A85017A" type="DOI">10.11646/zootaxa.4804.1.1</mods:identifier>
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<mods:identifier id="17C18B25C4E7631E9AC0C724FF03834A" type="ISSN">1175-5326</mods:identifier>
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<subSubSection id="C3448FAAFFB9FFDE6BD2E57AFC3B935A" box="[151,949,322,349]" pageId="22" pageNumber="23" type="nomenclature">
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<paragraph id="8BE1DC21FFB9FFDE6BD2E57AFC3B935A" blockId="22.[151,949,322,384]" box="[151,949,322,349]" pageId="22" pageNumber="23">
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<heading id="D0A96B4DFFB9FFDE6BD2E57AFC3B935A" bold="true" box="[151,949,322,349]" fontSize="11" level="1" pageId="22" pageNumber="23" reason="1">
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<taxonomicName id="4C5EA7A2FFB9FFDE6BD2E57AFC3B935A" authority="(Lochman, in Lochman & Duncan, 1944)" baseAuthorityName="Lochman, in Lochman & Duncan" baseAuthorityYear="1944" box="[151,949,322,349]" class="Trilobita" family="Kingstoniidae" genus="Maryvillia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
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<emphasis id="B92A0033FFB9FFDE6BD2E57AFC3B935A" bold="true" box="[151,949,322,349]" pageId="22" pageNumber="23">
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<emphasis id="B92A0033FFB9FFDE6BD2E57AFE25935B" bold="true" box="[151,427,322,349]" italics="true" pageId="22" pageNumber="23">Maryvillia triangularis</emphasis>
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(Lochman, in
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<bibRefCitation id="EFCFA1D0FFB9FFDE6927E57BFC23935A" author="Lochman, C. & Duncan, D." box="[610,941,322,349]" pageId="22" pageNumber="23" pagination="1 - 172" refId="ref23573" refString="Lochman, C. & Duncan, D. (1944) Early Upper Cambrian faunas of Central Montana. Geological Society of America Special Papers, 54, 1 - 172. https: // doi. org / 10.1130 / SPE 54 - p 1" type="journal article" year="1944">Lochman & Duncan, 1944</bibRefCitation>
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)
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</emphasis>
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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="C3448FAAFFB9FFDE6BD2E55EFE5D93FD" pageId="22" pageNumber="23" type="description">
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<paragraph id="8BE1DC21FFB9FFDE6BD2E55EFEA99386" blockId="22.[151,949,322,384]" box="[151,295,357,384]" pageId="22" pageNumber="23">
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<figureCitation id="1365C0A4FFB9FFDE6BD2E55EFF719386" box="[151,255,358,384]" captionStart="PLATE 24" captionStartId="72.[151,234,1839,1864]" captionText="PLATE 24. Maryvillia triangularis Lochman, in Lochman & Duncan, 1944, Pilgrim Formation, Half Moon Pass, Big Snowy Mountains, Montana. 1–3. Cranidium, paratype, USNM 127161, dorsal, anterior and lateral views, x11 (illustrated by Lochman & Duncan 1944, pl. 8, fig. 14). 4. Cranidium, paratype, USNM 127161, dorsal view, x11 (previously unillustrated). 5. Cranidium, paratype, USNM 127161, dorsal view, x15 (previously unillustrated). 6–8. Cranidium, paratype, USNM 127161, dorsal, anterior and lateral views, x20 (previously unillustrated). 9, 10. Pygidium, paratype, USNM 127161, posterior and dorsal views, x18 (previously unillustrated)." pageId="22" pageNumber="23">Plates 24</figureCitation>
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,
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<figureCitation id="1365C0A4FFB9FFDE6A4EE55DFEA99386" box="[267,295,357,384]" captionStart="PLATE 25" captionStartId="74.[151,234,1809,1834]" captionText="PLATE 25. Maryvillia triangularis Lochman, in Lochman & Duncan, 1944, Pilgrim Formation, Half Moon Pass, Big Snowy Mountains, Montana. 1–3. Pygidium, paratype, USNM 127160d, dorsal, lateral and posterior views, x18 (illustrated by Lochman & Duncan, 1944, pl. 8, fig. 18). 4. 5. Pygidium, paratype, USNM 127161, dorsal and posterior views, x18 (previously unillustrated). 6–8. Cranidium, holotype, USNM 127159, dorsal, lateral and anterior views, x20. (illustrated by Lochman & Duncan, 1944, pl. 8, figs 16, 17). 9. Pygidium, paratype, USNM 127160c, dorsal view, x14 (illustrated by Lochman & Duncan, 1944, pl. 8, fig. 15)." pageId="22" pageNumber="23">25</figureCitation>
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</paragraph>
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<paragraph id="8BE1DC21FFB9FFDE6BD2E59DFB8993BB" blockId="22.[151,1436,420,507]" box="[151,1031,420,445]" pageId="22" pageNumber="23">
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1944
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<taxonomicName id="4C5EA7A2FFB9FFDE6B95E59DFC9F93BB" authority="Lochman, in Lochman & Duncan" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[208,785,420,445]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
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<emphasis id="B92A0033FFB9FFDE6B95E59DFE3D93BB" box="[208,435,421,445]" italics="true" pageId="22" pageNumber="23">Blountina triangularis</emphasis>
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Lochman, in Lochman & Duncan
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</taxonomicName>
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, p. 57, pl. 8, figs 12–18.
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</paragraph>
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<paragraph id="8BE1DC21FFB9FFDE6BD2E5FBFE5D93FD" blockId="22.[151,1436,420,507]" pageId="22" pageNumber="23">
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1956
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<taxonomicName id="4C5EA7A2FFB9FFDE6B97E5FCFDAF93DA" authority="Lochman" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[210,545,451,476]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
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<emphasis id="B92A0033FFB9FFDE6B97E5FCFE3893DA" box="[210,438,452,476]" italics="true" pageId="22" pageNumber="23">Blountina triangularis</emphasis>
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Lochman
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</taxonomicName>
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; Rasetti, p. 1268 [included in list of species that Rasetti considered to be synonyms of
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<taxonomicName id="4C5EA7A2FFB9FFDE6B82E5DAFE4793FD" authority="Walcott" authorityName="Walcott" authorityYear="1916" box="[199,457,482,507]" class="Trilobita" family="Kingstoniidae" genus="Maryvillia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="arion">
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<emphasis id="B92A0033FFB9FFDE6B82E5DAFEE193FC" box="[199,367,482,506]" italics="true" pageId="22" pageNumber="23">Maryvillia arion</emphasis>
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Walcott
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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="C3448FAAFFB9FFDE6BD2E61BFCAB90CB" pageId="22" pageNumber="23" type="diagnosis">
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<paragraph id="8BE1DC21FFB9FFDE6BD2E61BFCAB90CB" blockId="22.[151,1437,547,1222]" pageId="22" pageNumber="23">
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<emphasis id="B92A0033FFB9FFDE6BD2E61BFE9C9038" bold="true" box="[151,274,547,574]" pageId="22" pageNumber="23">Diagnosis.</emphasis>
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Anterior border narrows abaxially with well-incised border furrow; steeply sloping preglabellar field. Moderately convex glabella that narrows (tr.) anteriorly to a broadly rounded front, and very shallow axial furrows. Posterolateral projections long and triangular, with posteriorly deflected margins. Pygidium subtriangular in outline with faint border, axial, and pleural furrows that all weaken posteriorly. Pitting (corresponding to small projections on underside of exoskeleton) preserved on internal mould.
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</paragraph>
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||
</subSubSection>
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||
<subSubSection id="C3448FAAFFB9FFDE6B82E6EFFD1491CC" pageId="22" pageNumber="23" type="materials_examined">
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||
<paragraph id="8BE1DC21FFB9FFDE6B82E6EFFC6E9184" blockId="22.[151,1437,547,1222]" pageId="22" pageNumber="23">
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||
<emphasis id="B92A0033FFB9FFDE6B82E6EFFEB890F4" bold="true" box="[199,310,727,754]" pageId="22" pageNumber="23">Material.</emphasis>
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||
<materialsCitation id="3B36D67CFFB9FFDE6A7BE6EFFC529184" collectionCode="USNM" county="Pilgrim Formation" location="Big Snowy Mountains" municipality="Half Moon Pass" pageId="22" pageNumber="23" specimenCode="USNM 127159, USNM 127161, USNM 127160" specimenCount="3" stateProvince="Montana" typeStatus="holotype">
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Figured specimens include the
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<typeStatus id="54E56283FFB9FFDE69D9E6EFFD7090F7" box="[668,766,727,753]" pageId="22" pageNumber="23" type="holotype">holotype</typeStatus>
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cranidium (
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||
<specimenCode id="DBF8745AFFB9FFDE68C3E6E0FBB990F4" box="[902,1079,727,754]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127159</specimenCode>
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, Pl. 16, figs 6–8), four
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<typeStatus id="54E56283FFB9FFDE6E79E6E0FA1290F4" box="[1340,1436,728,754]" pageId="22" pageNumber="23" type="paratype">paratype</typeStatus>
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cranidia (
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<specimenCode id="DBF8745AFFB9FFDE6A47E6C4FE389113" box="[258,438,763,790]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 24, figs 1–3;
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<specimenCode id="DBF8745AFFB9FFDE69C2E6C4FCB69113" box="[647,824,763,790]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 24, fig. 4;
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<specimenCode id="DBF8745AFFB9FFDE68ACE6C4FB149113" box="[1001,1178,763,790]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 24, fig. 5;
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<specimenCode id="DBF8745AFFB9FFDE6E0EE6C4FF60913F" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 24, figs 6–8), and four
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<typeStatus id="54E56283FFB9FFDE6966E718FD0D913C" box="[547,643,800,826]" pageId="22" pageNumber="23" type="paratype">paratype</typeStatus>
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pygidia (
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||
<specimenCode id="DBF8745AFFB9FFDE69ABE718FC11913F" box="[750,927,799,826]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127160</specimenCode>
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c, Pl. 25, fig.. 9;
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<specimenCode id="DBF8745AFFB9FFDE6F1CE718FA86913F" box="[1113,1288,799,826]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127160</specimenCode>
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d, Pl. 25, figs 1–3;
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<specimenCode id="DBF8745AFFB9FFDE6B94E77CFE0F915B" box="[209,385,835,862]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 25, figs 4, 5;
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<specimenCode id="DBF8745AFFB9FFDE6909E77CFD72915B" box="[588,764,835,862]" collectionCode="USNM" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:34871" lsid="urn:lsid:biocol.org:col:34871" name="Smithsonian Institution, National Museum of Natural History" pageId="22" pageNumber="23" type="Museum">USNM 127161</specimenCode>
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, Pl. 24, figs 9, 10) from the
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<collectingCounty id="6280A4ADFFB9FFDE6F7AE77BFA9D915B" box="[1087,1299,835,861]" pageId="22" pageNumber="23">Pilgrim Formation</collectingCounty>
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,
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<collectingMunicipality id="6B85465BFFB9FFDE6E5AE77BFF479184" pageId="22" pageNumber="23">Half Moon Pass</collectingMunicipality>
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section (
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<bibRefCitation id="EFCFA1D0FFB9FFDE6A6BE75FFDD99184" author="Lochman, C. & Duncan, D." box="[302,599,871,898]" pageId="22" pageNumber="23" pagination="1 - 172" refId="ref23573" refString="Lochman, C. & Duncan, D. (1944) Early Upper Cambrian faunas of Central Montana. Geological Society of America Special Papers, 54, 1 - 172. https: // doi. org / 10.1130 / SPE 54 - p 1" type="journal article" year="1944">Lochman & Duncan 1944</bibRefCitation>
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),
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<location id="8E818AFAFFB9FFDE692EE75FFCE49187" LSID="urn:lsid:plazi:treatment:03F76D37FFB9FFDE6BD2E57AFD4F96C3:8E818AFAFFB9FFDE692EE75FFCE49187" box="[619,874,871,898]" county="Pilgrim Formation" municipality="Half Moon Pass" name="Big Snowy Mountains" pageId="22" pageNumber="23" stateProvince="Montana">Big Snowy Mountains</location>
|
||
,
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<collectingRegion id="499A12C3FFB9FFDE6830E750FC529184" box="[885,988,872,898]" country="United States of America" name="Montana" pageId="22" pageNumber="23">Montana</collectingRegion>
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</materialsCitation>
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||
.
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</paragraph>
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<paragraph id="8BE1DC21FFB9FFDE6B82E7B3FD1491CC" blockId="22.[151,1437,547,1222]" pageId="22" pageNumber="23">
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||
<emphasis id="B92A0033FFB9FFDE6B82E7B3FED491A0" bold="true" box="[199,346,907,934]" pageId="22" pageNumber="23">Occurrence.</emphasis>
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<taxonomicName id="4C5EA7A2FFB9FFDE6A25E7B4FC6E91A0" authority="Zone, Pilgrim Formation, Half Moon Pass" authorityName="Zone, Pilgrim Formation, Half Moon Pass" box="[352,992,907,934]" class="Trilobita" family="Crepicephalidae" genus="Crepicephalus" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="genus">
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||
<emphasis id="B92A0033FFB9FFDE6A25E7B4FD8C91A0" box="[352,514,908,934]" italics="true" pageId="22" pageNumber="23">Crepicephalus</emphasis>
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||
<materialsCitation id="3B36D67CFFB9FFDE694CE7B4FC6E91A0" box="[521,992,907,934]" location="Big Snowy Mountains" pageId="22" pageNumber="23" specimenCount="1" stateProvince="Montana">Zone, Pilgrim Formation, Half Moon Pass</materialsCitation>
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||
</taxonomicName>
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section,
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<bibRefCitation id="EFCFA1D0FFB9FFDE6F07E7B3FA1291A0" author="Lochman, C. & Duncan, D." box="[1090,1436,907,934]" pageId="22" pageNumber="23" pagination="1 - 172" refId="ref23573" refString="Lochman, C. & Duncan, D. (1944) Early Upper Cambrian faunas of Central Montana. Geological Society of America Special Papers, 54, 1 - 172. https: // doi. org / 10.1130 / SPE 54 - p 1" type="journal article" year="1944">Lochman and Duncan’s (1944)</bibRefCitation>
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horizon 9.2,
|
||
<location id="8E818AFAFFB9FFDE6A60E797FDAA91CF" LSID="urn:lsid:plazi:treatment:03F76D37FFB9FFDE6BD2E57AFD4F96C3:8E818AFAFFB9FFDE6A60E797FDAA91CF" box="[293,548,943,970]" name="Big Snowy Mountains" pageId="22" pageNumber="23" stateProvince="Montana">Big Snowy Mountains</location>
|
||
,
|
||
<collectingRegion id="499A12C3FFB9FFDE696AE788FD1891CC" box="[559,662,944,970]" country="United States of America" name="Montana" pageId="22" pageNumber="23">Montana</collectingRegion>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C3448FAAFFB9FFDE6B82E7EBFD4F96C3" pageId="22" pageNumber="23" type="discussion">
|
||
<paragraph id="8BE1DC21FFB9FFDE6B82E7EBFD4F96C3" blockId="22.[151,1437,547,1222]" pageId="22" pageNumber="23">
|
||
<emphasis id="B92A0033FFB9FFDE6B82E7EBFECB91E8" bold="true" box="[199,325,979,1006]" pageId="22" pageNumber="23">Discussion</emphasis>
|
||
.
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6A16E7ECFD8A91EB" authorityName="Rasetti" authorityYear="1946" box="[339,516,980,1006]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFB9FFDE6A16E7ECFD8A91EB" box="[339,516,980,1006]" italics="true" pageId="22" pageNumber="23">Blountia nasuta</emphasis>
|
||
</taxonomicName>
|
||
(Pl. 12, figs 1–6) resembles
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6807E7ECFBCA91E8" baseAuthorityName="Lochman, in Lochman & Duncan" baseAuthorityYear="1944" box="[834,1092,980,1006]" class="Trilobita" family="Kingstoniidae" genus="Maryvillia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
|
||
<emphasis id="B92A0033FFB9FFDE6807E7ECFBCA91E8" box="[834,1092,980,1006]" italics="true" pageId="22" pageNumber="23">Maryvillia triangularis</emphasis>
|
||
</taxonomicName>
|
||
by having a roughly triangular anterior cranidial margin, and a pygidium is also triangular in outline (Pl. 12, figs 7–12). However,
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6FA1E7C0FAC09617" authorityName="Rasetti" authorityYear="1946" box="[1252,1358,1016,1042]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFB9FFDE6FA1E7C0FB7B9617" box="[1252,1269,1016,1041]" italics="true" pageId="22" pageNumber="23">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFB9FFDE6E46E7C0FAC09617" box="[1283,1358,1016,1041]" italics="true" pageId="22" pageNumber="23">nasuta</emphasis>
|
||
</taxonomicName>
|
||
differs in having a longer frontal area (accounting for 37% cranidial length, versus 28% in
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6F0FE024FB789630" baseAuthorityName="Lochman, in Lochman & Duncan" baseAuthorityYear="1944" box="[1098,1270,1052,1078]" class="Trilobita" family="Kingstoniidae" genus="Maryvillia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
|
||
<emphasis id="B92A0033FFB9FFDE6F0FE024FB789630" box="[1098,1270,1052,1078]" italics="true" pageId="22" pageNumber="23">M. triangularis</emphasis>
|
||
</taxonomicName>
|
||
) with a longer preglabellar field (occupying 46% of frontal area, versus 30%), and a flat, rather than concave border. The facial sutures of
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6A49E05CFEF8967B" authorityName="Rasetti" authorityYear="1946" box="[268,374,1124,1149]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFB9FFDE6A49E05CFEF8967B" box="[268,374,1124,1149]" italics="true" pageId="22" pageNumber="23">B. nasuta</emphasis>
|
||
</taxonomicName>
|
||
diverge forward from the palpebral lobes, whereas the anterior branches of
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE6F8DE05CFAFD9678" baseAuthorityName="Lochman, in Lochman & Duncan" baseAuthorityYear="1944" box="[1224,1395,1124,1150]" class="Trilobita" family="Kingstoniidae" genus="Maryvillia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="triangularis">
|
||
<emphasis id="B92A0033FFB9FFDE6F8DE05CFAFD9678" box="[1224,1395,1124,1150]" italics="true" pageId="22" pageNumber="23">M. triangularis</emphasis>
|
||
</taxonomicName>
|
||
are nearly parallel. The pygidium of
|
||
<taxonomicName id="4C5EA7A2FFB9FFDE694DE0B0FDFC96A7" authorityName="Rasetti" authorityYear="1946" box="[520,626,1160,1186]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="22" pageNumber="23" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFB9FFDE694DE0B0FD9796A7" box="[520,537,1160,1185]" italics="true" pageId="22" pageNumber="23">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFB9FFDE6962E0B0FDFC96A7" box="[551,626,1160,1185]" italics="true" pageId="22" pageNumber="23">nasuta</emphasis>
|
||
</taxonomicName>
|
||
is noticeably flatter (e.g., compare Pl. 12, figs 7. 9, 12 and Pl. 25, figs 2, 3, 5), with a shorter axis and longer (sag.) border.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |