228 lines
26 KiB
XML
228 lines
26 KiB
XML
<document id="C7E5AB8B34267B03FE277356BAB912F2" 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="03F76D37FFA1FFC66BD2E654FB599448" 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="Blountia nasuta Rasetti 1946" docType="treatment" docVersion="4" lastPageNumber="15" 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="15" updateTime="1698776919363" updateUser="plazi">
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<mods:title id="420DFEB29521F92AD4662EFD0E000CCA">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="200774B8E2FD9CA48B3AAB0D2FA41201">Westrop, Madison Armstrong Stephen R.</mods:namePart>
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<mods:namePart id="E1A3E65A8669A3DB0F7181B481254DF6">Eoff, Jennifer D.</mods:namePart>
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<mods:title id="CA39F703DD08ADEBB0BDE54B531BF12A">Zootaxa</mods:title>
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<mods:part id="BB3BCC04667E4716B53D326AA4EFB668">
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<mods:date id="3DBA1CE07FFE5323FCB677DEEDCCE6D2">2020</mods:date>
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<mods:number id="D8495F3BE9DAAF67D01842A365476EE9">2020-06-30</mods:number>
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<mods:number id="7D64268E78BD726E0FF0AC38926D07A9">4804</mods:number>
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<mods:identifier id="7FDAA41F120620A5DB7EE5C7CEFE1801" type="DOI">10.11646/zootaxa.4804.1.1</mods:identifier>
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<mods:identifier id="2F4B3191193658B8BD238A991B674FC2" type="ISSN">1175-5326</mods:identifier>
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<subSubSection id="C3448FAAFFA1FFC66BD2E654FE7C9081" box="[151,498,620,647]" pageId="14" pageNumber="15" type="nomenclature">
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<paragraph id="8BE1DC21FFA1FFC66BD2E654FE7C9081" blockId="14.[151,498,620,683]" box="[151,498,620,647]" pageId="14" pageNumber="15">
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<taxonomicName id="4C5EA7A2FFA1FFC66BD2E654FE7C9081" authority="Rasetti, 1946" authorityName="Rasetti" authorityYear="1946" box="[151,498,620,647]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
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<emphasis id="B92A0033FFA1FFC66BD2E654FE7C9081" bold="true" box="[151,498,620,647]" pageId="14" pageNumber="15">
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<emphasis id="B92A0033FFA1FFC66BD2E654FEDF9081" bold="true" box="[151,337,620,647]" italics="true" pageId="14" pageNumber="15">Blountia nasuta</emphasis>
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<bibRefCitation id="EFCFA1D0FFA1FFC66A1DE654FE7C9081" author="Rasetti, F." box="[344,498,620,647]" pageId="14" pageNumber="15" pagination="442 - 446" refId="ref23810" refString="Rasetti, F. (1946) Early Upper Cambrian trilobites from western Gaspe. Journal of Paleontology, 20, 442 - 446." type="journal article" year="1946">Rasetti, 1946</bibRefCitation>
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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="C3448FAAFFA1FFC66BD2E6A9FD4190EB" pageId="14" pageNumber="15" type="description">
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<paragraph id="8BE1DC21FFA1FFC66BD2E6A9FF7C90AD" blockId="14.[151,498,620,683]" box="[151,242,657,683]" pageId="14" pageNumber="15">
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<figureCitation id="1365C0A4FFA1FFC66BD2E6A9FF7C90AD" box="[151,242,657,683]" captionStart="PLATE 12" captionStartId="48.[151,234,1839,1864]" captionText="PLATE 12. Blountia nasuta Rasetti, 1946, lower Grosses-Roches Formation, Grosse-Roches, Matane County, Gaspé Peninsula, eastern Quebec, boulder G-29. 1–3. Cranidium, holotype, GSC 140496 (LU 1005a), anterior, lateral and dorsal views, x11 (illustrated by Rasetti 1946, pl. 67, figs 11, 12). 4–6. Cranidium, paratype, GSC 140497 (LU 1005f), lateral, anterior and dorsal views, x18 (previously unillustrated). 7–9. Pygidium, paratype, GSC 140498 (LU 1005b), lateral, dorsal and posterior views, x9 (illustrated by Rasetti 1946, pl. 67, fig. 14). 10. Pygidium, paratype, GSC 140499 (LU 1005e), dorsal view, x8 (previously unillustrated). 11, 12. Pygidium, paratype, GSC 140500 (LU 1005c), dorsal and posterior views, x12 (illustrated by Rasetti 1946, pl. 67, fig. 13)." pageId="14" pageNumber="15">Plate 12</figureCitation>
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</paragraph>
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<paragraph id="8BE1DC21FFA1FFC66BD2E6EDFD4190EB" blockId="14.[151,719,725,750]" box="[151,719,725,750]" pageId="14" pageNumber="15">
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1946
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<taxonomicName id="4C5EA7A2FFA1FFC66B95E6EDFE4F90E8" authority="Rasetti" authorityName="Rasetti" authorityYear="1946" box="[208,449,725,750]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
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<emphasis id="B92A0033FFA1FFC66B95E6EDFEFC90EB" box="[208,370,725,749]" italics="true" pageId="14" pageNumber="15">Blountia nasuta</emphasis>
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Rasetti
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</taxonomicName>
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, p. 446, pl. 67, figs 11–14.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3448FAAFFA1FFC66BD2E723FE399608" pageId="14" pageNumber="15" type="diagnosis">
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<paragraph id="8BE1DC21FFA1FFC66BD2E723FE399608" blockId="14.[151,1437,795,1614]" pageId="14" pageNumber="15">
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<emphasis id="B92A0033FFA1FFC66BD2E723FE9C9130" bold="true" box="[151,274,795,822]" pageId="14" pageNumber="15">Diagnosis.</emphasis>
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Anterior border increases in length medially, producing nasute outline; maximum length roughly equal to length (sag.) of preglabellar field. Abrupt slope change between down-sloping preglabellar field and nearly flat anterior border; shallow anterior border furrow. Palpebral lobes situated posteriorly, near mid-length of glabella. Triangular pygidium with border occupying 25% of length (sag.) but narrowing abaxially. Border furrow faint; moderately incised axial furrows that weaken at axis tip. Pleural field gently inflated above border. At least nine axial rings and short terminal piece expressed on internal moulds, as are pits corresponding to small projections on underside of exoskeleton.
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</paragraph>
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</subSubSection>
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||
<subSubSection id="C3448FAAFFA1FFC66B82E02FFD1396E0" pageId="14" pageNumber="15" type="materials_examined">
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<paragraph id="8BE1DC21FFA1FFC66B82E02FFC5E9698" blockId="14.[151,1437,795,1614]" pageId="14" pageNumber="15">
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<emphasis id="B92A0033FFA1FFC66B82E02FFEB89634" bold="true" box="[199,310,1047,1074]" pageId="14" pageNumber="15">Material.</emphasis>
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<materialsCitation id="3B36D67CFFA1FFC66A78E020FC5E9698" collectingDate="00-05-14" collectingDateMax="99-04-14" collectingDateMin="00-05-14" collectionCode="GSC" county="Matane County" location="Grosses-Roches" municipality="lower Grosses-Roches Formation" pageId="14" pageNumber="15" specimenCode="LU 1005, LU 1105" specimenCount="3" stateProvince="Quebec" typeStatus="holotype">
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<typeStatus id="54E56283FFA1FFC66A78E020FE2B9634" box="[317,421,1048,1074]" pageId="14" pageNumber="15" type="holotype">Holotype</typeStatus>
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cranidium (
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<date id="FFE0FAE1FFA1FFC6692EE02FFD319637" box="[619,703,1047,1073]" pageId="14" pageNumber="15" value="96-04-14">
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</date>
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[
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<specimenCode id="DBF8745AFFA1FFC66989E020FCB99634" box="[716,823,1047,1074]" collectionCode="LU" country="Russia" name="St. Petersburg University" pageId="14" pageNumber="15">LU 1005</specimenCode>
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a], Pl. 12, figs 1–3) a
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<typeStatus id="54E56283FFA1FFC66F67E020FB0C9634" box="[1058,1154,1048,1074]" pageId="14" pageNumber="15" type="paratype">paratype</typeStatus>
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cranidium (
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<date id="FFE0FAE1FFA1FFC66E0DE020FA129634" box="[1352,1436,1048,1074]" pageId="14" pageNumber="15" value="97-04-14">
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<collectingDate id="EFA40309FFA1FFC66E0DE020FA129634" box="[1352,1436,1048,1074]" pageId="14" pageNumber="15" value="97-04-14">140497</collectingDate>
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</date>
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[
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<specimenCode id="DBF8745AFFA1FFC66BDBE004FE869650" box="[158,264,1083,1110]" collectionCode="LU" country="Russia" name="St. Petersburg University" pageId="14" pageNumber="15">LU 1105</specimenCode>
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f], Pl. 12, figs 4–6), and three
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<typeStatus id="54E56283FFA1FFC66918E004FD339650" box="[605,701,1084,1110]" pageId="14" pageNumber="15" type="paratype">paratype</typeStatus>
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pygidia (
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<date id="FFE0FAE1FFA1FFC6682CE004FC339650" box="[873,957,1084,1110]" pageId="14" pageNumber="15" value="98-04-14">
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<collectingDate id="EFA40309FFA1FFC6682CE004FC339650" box="[873,957,1084,1110]" pageId="14" pageNumber="15" value="98-04-14">140498</collectingDate>
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</date>
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[
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<specimenCode id="DBF8745AFFA1FFC66889E004FBB69650" box="[972,1080,1083,1110]" collectionCode="LU" country="Russia" name="St. Petersburg University" pageId="14" pageNumber="15">LU 1005</specimenCode>
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b], Pl. 14, figs 79;
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<collectionCode id="ED4F44E4FFA1FFC66E4FE004FACE9650" box="[1290,1344,1084,1110]" country="Canada" httpUri="http://grbio.org/cool/52gs-z31g" name="Geological Survey of Canada" pageId="14" pageNumber="15">GSC</collectionCode>
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<date id="FFE0FAE1FFA1FFC66E0DE004FA129650" box="[1352,1436,1084,1110]" pageId="14" pageNumber="15" value="99-04-14">
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<collectingDate id="EFA40309FFA1FFC66E0DE004FA129650" box="[1352,1436,1084,1110]" pageId="14" pageNumber="15" value="99-04-14">140499</collectingDate>
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</date>
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[
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<specimenCode id="DBF8745AFFA1FFC66BDBE058FE86967C" box="[158,264,1119,1146]" collectionCode="LU" country="Russia" name="St. Petersburg University" pageId="14" pageNumber="15">LU 1005</specimenCode>
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e], Pl. 12, fig. 10;
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<collectionCode id="ED4F44E4FFA1FFC66A8DE058FE70967C" box="[456,510,1120,1146]" country="Canada" httpUri="http://grbio.org/cool/52gs-z31g" name="Geological Survey of Canada" pageId="14" pageNumber="15">GSC</collectionCode>
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<date id="FFE0FAE1FFA1FFC66940E067FDD7967C" box="[517,601,1119,1146]" pageId="14" pageNumber="15" value="00-05-14">
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<collectingDate id="EFA40309FFA1FFC66940E067FDD7967C" box="[517,601,1119,1146]" pageId="14" pageNumber="15" value="00-05-14">140500</collectingDate>
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</date>
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[
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<specimenCode id="DBF8745AFFA1FFC66920E058FD41967C" box="[613,719,1119,1146]" collectionCode="LU" country="Russia" name="St. Petersburg University" pageId="14" pageNumber="15">LU 1005</specimenCode>
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||
c], Pl. 12, figs 11, 12) from the
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<collectingMunicipality id="6B85465BFFA1FFC66F64E058FA17967C" box="[1057,1433,1120,1146]" pageId="14" pageNumber="15">lower Grosses-Roches Formation</collectingMunicipality>
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,
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<location id="8E818AFAFFA1FFC66BD2E0BCFEC09698" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC66BD2E654FB599448:8E818AFAFFA1FFC66BD2E0BCFEC09698" box="[151,334,1156,1182]" county="Matane County" municipality="lower Grosses-Roches Formation" name="Grosses-Roches" pageId="14" pageNumber="15" stateProvince="Quebec">Grosses-Roches</location>
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,
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<location id="8E818AFAFFA1FFC66A1FE0BCFD8F9698" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC66BD2E654FB599448:8E818AFAFFA1FFC66A1FE0BCFD8F9698" box="[346,513,1156,1182]" county="Matane County" municipality="lower Grosses-Roches Formation" name="western Gaspe" pageId="14" pageNumber="15" stateProvince="Quebec">western Gaspé</location>
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,
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<collectingCounty id="6280A4ADFFA1FFC66949E0BCFD359698" box="[524,699,1156,1182]" pageId="14" pageNumber="15">Matane County</collectingCounty>
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,
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<collectingRegion id="499A12C3FFA1FFC66980E0BCFC959698" box="[709,795,1156,1182]" country="Canada" name="Quebec" pageId="14" pageNumber="15">Quebec</collectingRegion>
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(
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||
<bibRefCitation id="EFCFA1D0FFA1FFC6686FE0BCFC4D9698" author="Rasetti, F." box="[810,963,1155,1182]" pageId="14" pageNumber="15" pagination="442 - 446" refId="ref23810" refString="Rasetti, F. (1946) Early Upper Cambrian trilobites from western Gaspe. Journal of Paleontology, 20, 442 - 446." type="journal article" year="1946">Rasetti, 1946</bibRefCitation>
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).
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||
</materialsCitation>
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</paragraph>
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<paragraph id="8BE1DC21FFA1FFC66B82E09FFD1396E0" blockId="14.[151,1437,795,1614]" pageId="14" pageNumber="15">
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<emphasis id="B92A0033FFA1FFC66B82E09FFED496C4" bold="true" box="[199,346,1191,1218]" pageId="14" pageNumber="15">Occurrence.</emphasis>
|
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<taxonomicName id="4C5EA7A2FFA1FFC66A25E090FDCB96C4" authority="Zone" authorityName="Zone" box="[352,581,1192,1218]" class="Trilobita" family="Crepicephalidae" genus="Crepicephalus" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B92A0033FFA1FFC66A25E090FD8C96C4" box="[352,514,1192,1218]" italics="true" pageId="14" pageNumber="15">Crepicephalus</emphasis>
|
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<materialsCitation id="3B36D67CFFA1FFC6694CE090FDCB96C4" box="[521,581,1192,1218]" county="Matane County" location="Grosses-Roches" municipality="lower Grosses-Roches Formation" pageId="14" pageNumber="15" specimenCount="1" stateProvince="Quebec">Zone</materialsCitation>
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||
</taxonomicName>
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||
,
|
||
<collectingMunicipality id="6B85465BFFA1FFC66914E090FC4496C4" box="[593,970,1192,1218]" pageId="14" pageNumber="15">lower Grosses-Roches Formation</collectingMunicipality>
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,
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<location id="8E818AFAFFA1FFC66890E090FB0296C4" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC66BD2E654FB599448:8E818AFAFFA1FFC66890E090FB0296C4" box="[981,1164,1192,1218]" county="Matane County" municipality="lower Grosses-Roches Formation" name="Grosses-Roches" pageId="14" pageNumber="15" stateProvince="Quebec">Grosses-Roches</location>
|
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,
|
||
<location id="8E818AFAFFA1FFC66FD2E090FAB096C4" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC66BD2E654FB599448:8E818AFAFFA1FFC66FD2E090FAB096C4" box="[1175,1342,1192,1218]" county="Matane County" municipality="lower Grosses-Roches Formation" name="western Gaspe" pageId="14" pageNumber="15" stateProvince="Quebec">western Gaspé</location>
|
||
,
|
||
<collectingCounty id="6280A4ADFFA1FFC66E0DE090FF6596E0" pageId="14" pageNumber="15">Matane County</collectingCounty>
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,
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<collectingRegion id="499A12C3FFA1FFC66BB3E0F4FEC096E0" box="[246,334,1228,1254]" country="Canada" name="Quebec" pageId="14" pageNumber="15">Quebec</collectingRegion>
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||
, boulder G-29 (
|
||
<bibRefCitation id="EFCFA1D0FFA1FFC66ABBE0F4FD1F96E0" author="Rasetti, F." box="[510,657,1227,1254]" pageId="14" pageNumber="15" pagination="442 - 446" refId="ref23810" refString="Rasetti, F. (1946) Early Upper Cambrian trilobites from western Gaspe. Journal of Paleontology, 20, 442 - 446." type="journal article" year="1946">Rasetti 1946</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C3448FAAFFA1FFC66B82E0D7FB599448" pageId="14" pageNumber="15" type="discussion">
|
||
<paragraph id="8BE1DC21FFA1FFC66B82E0D7FB599448" blockId="14.[151,1437,795,1614]" pageId="14" pageNumber="15">
|
||
<emphasis id="B92A0033FFA1FFC66B82E0D7FEC2970C" bold="true" box="[199,332,1263,1290]" pageId="14" pageNumber="15">Discussion.</emphasis>
|
||
Among species of
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66966E0C8FD0D970C" authorityName="Walcott" authorityYear="1916" box="[547,643,1264,1290]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B92A0033FFA1FFC66966E0C8FD0D970C" box="[547,643,1264,1290]" italics="true" pageId="14" pageNumber="15">Blountia</emphasis>
|
||
</taxonomicName>
|
||
, the nasute outline of the anterior border of the cranidium of
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66E77E0C8FA13970F" authorityName="Rasetti" authorityYear="1946" box="[1330,1437,1264,1289]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66E77E0C8FA13970F" box="[1330,1437,1264,1289]" italics="true" pageId="14" pageNumber="15">B. nasuta</emphasis>
|
||
</taxonomicName>
|
||
is matched only in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66A28E12CFD869728" authority="Westrop & Eoff, 2020" authorityName="Westrop & Eoff" authorityYear="2020" box="[365,520,1300,1326]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nevadensis" status="sp. nov.">
|
||
<emphasis id="B92A0033FFA1FFC66A28E12CFD869728" box="[365,520,1300,1326]" italics="true" pageId="14" pageNumber="15">B. nevadensis</emphasis>
|
||
</taxonomicName>
|
||
<emphasis id="B92A0033FFA1FFC6694AE12CFDC09728" bold="true" box="[527,590,1300,1326]" pageId="14" pageNumber="15">
|
||
<taxonomicNameLabel id="A219BD48FFA1FFC6694AE12CFDC09728" box="[527,590,1300,1326]" pageId="14" pageNumber="15" rank="species">n. sp.</taxonomicNameLabel>
|
||
</emphasis>
|
||
(Pl. 16, figs 1–3, 8). However, the latter species differs by having a shorter frontal area (equal to 30% cranidial length (sag.) versus 37% in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66833E100FC6F9757" authorityName="Rasetti" authorityYear="1946" box="[886,993,1336,1362]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66833E100FC099757" box="[886,903,1336,1361]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC668D3E100FC6F9757" box="[918,993,1336,1361]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
) and an even shorter preglabellar field (36% of frontal area length [sag.], versus 46% in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66986E164FCA09773" authorityName="Rasetti" authorityYear="1946" box="[707,814,1372,1398]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66986E164FD5A9773" box="[707,724,1372,1397]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC669A6E164FCA09773" box="[739,814,1372,1397]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
). The palpebral lobes in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66F02E164FB3F9773" authorityName="Rasetti" authorityYear="1946" box="[1095,1201,1372,1398]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66F02E164FBD69773" box="[1095,1112,1372,1397]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66F23E164FB3F9773" box="[1126,1201,1372,1397]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
are more posteriorly positioned, so that the posterolateral projections are shorter (exsag.) and lack the conspicuous posterior deflection of the tips that characterizes
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66A92E19CFDFF97B8" authorityName="Westrop & Eoff" authorityYear="2020" box="[471,625,1444,1470]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nevadensis">
|
||
<emphasis id="B92A0033FFA1FFC66A92E19CFE6697BB" box="[471,488,1444,1469]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66AB3E19CFDFF97B8" box="[502,625,1444,1470]" italics="true" pageId="14" pageNumber="15">nevadensis</emphasis>
|
||
</taxonomicName>
|
||
. The pygidia are dramatically different:
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66F70E19CFB1197BB" authorityName="Rasetti" authorityYear="1946" box="[1077,1183,1444,1470]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66F70E19CFBC897BB" box="[1077,1094,1444,1469]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66F11E19CFB1197BB" box="[1108,1183,1444,1469]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
(Pl. 12, figs 7–12) has a subtriangular outline with a posteriorly expanded border, and the axis has at least one more axial ring in front of the terminal piece. In contrast,
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66AABE1D4FD099400" authorityName="Westrop & Eoff" authorityYear="2020" box="[494,647,1516,1542]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nevadensis">
|
||
<emphasis id="B92A0033FFA1FFC66AABE1D4FE719403" box="[494,511,1516,1541]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66949E1D4FD099400" box="[524,647,1516,1542]" italics="true" pageId="14" pageNumber="15">nevadensis</emphasis>
|
||
</taxonomicName>
|
||
(Pl. 16, figs 6, 7, 9) is semielliptical in outline with a rounded posterior margin, and has a shorter (sag.) border (equal to 17% of pygidial length versus to 25% in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66F31E228FB53942F" authorityName="Rasetti" authorityYear="1946" box="[1140,1245,1552,1578]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66F31E228FB0B942F" box="[1140,1157,1552,1577]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66FD7E228FB53942F" box="[1170,1245,1552,1577]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
) that shows little change in length abaxially. The border furrow, although weak, is better defined than in
|
||
<taxonomicName id="4C5EA7A2FFA1FFC66F23E20CFB5E944B" authorityName="Rasetti" authorityYear="1946" box="[1126,1232,1588,1614]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="nasuta">
|
||
<emphasis id="B92A0033FFA1FFC66F23E20CFBF9944B" box="[1126,1143,1588,1613]" italics="true" pageId="14" pageNumber="15">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFA1FFC66FC0E20CFB5E944B" box="[1157,1232,1588,1613]" italics="true" pageId="14" pageNumber="15">nasuta</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |