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209 lines
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<document id="534396F2B99C5CF97BB68F1CED23444C" 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="03F76D37FFA1FFC76BD2E2A7FE659591" 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 tennesseensis Westrop & Eoff 2020, n. sp." docType="treatment" docVersion="3" lastPageNumber="16" 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="E7E96C79D540E975EEB4C032CA59B51C">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:name id="E29CABE7E050E61935D201B1B9E479AD" type="personal">
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<mods:roleTerm id="62ECDB6C24448C85A3C133E3A4EDBAD5">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="A4686121FBDE7AD92BF457EC6A5E6FF1">Westrop, Madison Armstrong Stephen R.</mods:namePart>
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</mods:name>
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<mods:name id="FE648F3DCE5448F89BFBCA714BD42136" type="personal">
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<mods:roleTerm id="781796F664219A4DD01130B10359640E">Author</mods:roleTerm>
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</mods:role>
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<mods:namePart id="CC7EF5A9C389E5E6EDC33ADFF288C708">Eoff, Jennifer D.</mods:namePart>
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</mods:name>
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<mods:typeOfResource id="7CD0B0DDF507CE4BE5CB9B216C46D77F">text</mods:typeOfResource>
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<mods:titleInfo id="13334F9E747F117B94A72BB28AF5432E">
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<mods:title id="C65AC01F0B39928CF14D478C63AC1C7B">Zootaxa</mods:title>
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</mods:titleInfo>
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<mods:part id="9A3971B9BD02706F62EF00151A94DC82">
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<mods:date id="77FE3D183572C7A4EEA6C468BE3006D1">2020</mods:date>
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<mods:detail id="92F783C24053EB630F5FB31271199591" type="pubDate">
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<mods:number id="0E8BC5EA4487C273D448552EAF089D76">2020-06-30</mods:number>
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</mods:detail>
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<mods:detail id="B2BD865CAA42FD48F46319DD88E831A0" type="volume">
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<mods:number id="21C3A40531BE1440997960C1C5B64269">4804</mods:number>
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</mods:detail>
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<mods:detail id="FA8CF0FFFAE73731F1E546740535D05C" type="issue">
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<mods:number id="355F3725E197999B4DED122BD8CBF2F0">1</mods:number>
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<mods:start id="96E2C21F46974E4711D01F624DAF5C9D">1</mods:start>
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<mods:end id="5AA3B04D3F8B514E2269E224E119ABFE">79</mods:end>
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</mods:extent>
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<mods:classification id="913C3AEBFFFD1FFF6CF1038A279F7B74">journal article</mods:classification>
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<mods:identifier id="90F4C5967160AA9E091DF4931427EBBD" type="DOI">10.11646/zootaxa.4804.1.1</mods:identifier>
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<mods:identifier id="134076F359744121F1EC95BD12E4523A" type="ISSN">1175-5326</mods:identifier>
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<mods:identifier id="CF90C3074E3573C0415D0B4C064018B1" type="Zenodo-Dep">3927094</mods:identifier>
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</mods:mods>
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<treatment id="03F76D37FFA1FFC76BD2E2A7FE659591" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC76BD2E2A7FE659591" httpUri="http://treatment.plazi.org/id/03F76D37FFA1FFC76BD2E2A7FE659591" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15">
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<subSubSection id="C3448FAAFFA1FFC66BD2E2A7FE7B94BC" box="[151,501,1695,1722]" pageId="14" pageNumber="15" type="nomenclature">
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<paragraph id="8BE1DC21FFA1FFC66BD2E2A7FE7B94BC" blockId="14.[151,501,1695,1758]" box="[151,501,1695,1722]" pageId="14" pageNumber="15">
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<heading id="D0A96B4DFFA1FFC66BD2E2A7FE7B94BC" bold="true" box="[151,501,1695,1722]" fontSize="11" level="1" pageId="14" pageNumber="15" reason="1">
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<emphasis id="B92A0033FFA1FFC66BD2E2A7FE7B94BC" bold="true" box="[151,501,1695,1722]" pageId="14" pageNumber="15">
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<taxonomicName id="4C5EA7A2FFA1FFC66BD2E2A7FE2594BC" authority="Westrop & Eoff, 2020" authorityName="Westrop & Eoff" authorityYear="2020" box="[151,427,1695,1722]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="tennesseensis" status="sp. nov.">
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<emphasis id="B92A0033FFA1FFC66BD2E2A7FE2594BC" bold="true" box="[151,427,1695,1722]" italics="true" pageId="14" pageNumber="15">Blountia tennesseensis</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="A219BD48FFA1FFC66AF6E298FE7B94BC" box="[435,501,1696,1722]" pageId="14" pageNumber="15" rank="species">n. sp.</taxonomicNameLabel>
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</emphasis>
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</heading>
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</paragraph>
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</subSubSection>
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<subSubSection id="C3448FAAFFA1FFC66BD2E2FCFBCD9526" pageId="14" pageNumber="15" type="description">
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<paragraph id="8BE1DC21FFA1FFC66BD2E2FCFEA994D8" blockId="14.[151,501,1695,1758]" box="[151,295,1732,1758]" pageId="14" pageNumber="15">
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<figureCitation id="1365C0A4FFA1FFC66BD2E2FCFF7194D8" box="[151,255,1732,1758]" captionStart="PLATE 13" captionStartId="50.[151,234,1897,1922]" captionText="PLATE 13. Blountia tennesseensis n. sp., Nolichucky Formation, northeastern Tennessee. 1–3. Cranidium, paratype, USNM 144598, dorsal, lateral and anterior views, x18 (illustrated by Rasetti 1965, pl. 9, figs 13, 16 as B. montanensis Duncan). 4–6. Cranidium, paratype, USNM 144599, dorsal, anterior and lateral views, x20 (illustrated by Rasetti 1965, pl. 9, fig. 20 as B. montanensis Duncan). 7–9. Pygidium, paratype, USNM 144598, dorsal, lateral and posterior views, x20 (illustrated by Rasetti 1965, pl. 9, fig. 15 as B. montanensis Duncan)." pageId="14" pageNumber="15">Plates 13</figureCitation>
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,
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<figureCitation id="1365C0A4FFA1FFC66A4EE2FCFEA994D8" box="[267,295,1732,1758]" captionStart="PLATE 14" captionStartId="52.[151,234,1839,1864]" captionText="PLATE 14. Blountia tennesseensis n. sp., Nolichucky Formation, northeastern Tennessee. 1–3. Cranidium, holotype, USNM 144599, dorsal, lateral and anterior views, x11 (illustrated by Rasetti 1965, pl. 9, fig. 17 as B. montanensis Duncan). 4. Pygidium, paratype, USNM 144599, dorsal view, x18 (illustrated by Rasetti 1965, pl. 9, fig. 18 as B. montanensis Duncan) 5, 6. Pygidium, paratype, USNM 144599, dorsal and posterior views, x11 (illustrated by Rasetti 1965, pl. 9, fig. 19 as B. montanensis Duncan). 7, 8. Librigena paratype, USNM 144598, dorsal and lateral views, x16 (illustrated by Rasetti 1965, pl. 9, fig. 14 as B. montanensis Duncan)." pageId="14" pageNumber="15">14</figureCitation>
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</paragraph>
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<paragraph id="8BE1DC21FFA1FFC66BD2E33FFBCD9526" blockId="14.[151,1091,1799,1824]" box="[151,1091,1799,1824]" pageId="14" pageNumber="15">
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1965
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<taxonomicName id="4C5EA7A2FFA1FFC66B95E330FD749519" authority="Duncan, in Lochman & Duncan" authorityName="Duncan, in Lochman & Duncan" authorityYear="1944" box="[208,762,1799,1824]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="montanensis">
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<emphasis id="B92A0033FFA1FFC66B95E330FE239526" box="[208,429,1800,1824]" italics="true" pageId="14" pageNumber="15">Blountia montanensis</emphasis>
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Duncan, in Lochman & Duncan
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</taxonomicName>
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; Rasetti, p. 57, pl. 9, figs 13–20.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3448FAAFFA1FFC76BD2E375FC9592FD" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15" type="diagnosis">
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<paragraph id="8BE1DC21FFA1FFC76BD2E375FB6692D1" blockId="14.[151,1437,1869,2041]" lastBlockId="15.[151,1437,153,1943]" lastPageId="15" lastPageNumber="16" pageId="14" pageNumber="15">
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<emphasis id="B92A0033FFA1FFC66BD2E375FE9C956E" bold="true" box="[151,274,1869,1896]" pageId="14" pageNumber="15">Diagnosis.</emphasis>
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Cranidium strongly arched in lateral view. Frontal area short, equal to 20% (19–21) of cranidial length, and flexed steeply downward. Glabella occupies two-thirds (67%; 66–70) of cranidial width across palpebral lobes. Palpebral area of fixigena very narrow, equal to 24% (20–26) of glabellar width. Anterior branches of facial sutures nearly parallel between palpebral lobe and anterior border furrow; posterior branches diverge backward along curved path so that cranidial width at palpebral lobe equals 70% (69-73) of width between posterior corners of cra- nidium. Pygidium with axis of seven axial rings and terminal piece of at least two segments occupying 82% (80–84) of pygidial length. Border furrow faint; border maintains nearly even width along pygidial margin.
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</paragraph>
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<paragraph id="8BE1DC21FFA0FFC76B82E4D9FC9592FD" blockId="15.[151,1437,153,1943]" box="[199,795,225,251]" pageId="15" pageNumber="16">
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<emphasis id="B92A0033FFA0FFC76B82E4D9FE9A92FD" bold="true" box="[199,276,225,251]" pageId="15" pageNumber="16">Name.</emphasis>
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<materialsCitation id="3B36D67CFFA0FFC76A5EE4D9FC9992FD" box="[283,791,225,251]" location="Tennessee" pageId="15" pageNumber="16" specimenCount="1" stateProvince="Tennessee">
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For the
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<typeStatus id="54E56283FFA0FFC76A37E4D9FE2C92FD" box="[370,418,225,251]" pageId="15" pageNumber="16">type</typeStatus>
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area of this species in
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<collectingRegion id="499A12C3FFA0FFC769E4E4D9FC9992FD" box="[673,791,225,251]" country="United States of America" name="Tennessee" pageId="15" pageNumber="16">Tennessee</collectingRegion>
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</materialsCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection id="C3448FAAFFA0FFC76B82E53CFDC193D5" pageId="15" pageNumber="16" type="materials_examined">
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<paragraph id="8BE1DC21FFA0FFC76B82E53CFB60938D" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">
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<emphasis id="B92A0033FFA0FFC76B82E53CFEB89319" bold="true" box="[199,310,260,287]" pageId="15" pageNumber="16">Material.</emphasis>
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<materialsCitation id="3B36D67CFFA0FFC76A7EE53DFB64938D" collectionCode="USNM" county="Hawkins County" location="Nolichucky Formation" municipality="All" pageId="15" pageNumber="16" specimenCode="USNM 144599, USNM 144598" specimenCount="2" stateProvince="Tennessee" typeStatus="holotype">
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<collectingMunicipality id="6B85465BFFA0FFC76A7EE53DFED19319" box="[315,351,261,287]" pageId="15" pageNumber="16">All</collectingMunicipality>
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specimens are from the
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<location id="8E818AFAFFA0FFC76928E53DFCE39319" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC76BD2E2A7FE659591:8E818AFAFFA0FFC76928E53DFCE39319" box="[621,877,261,287]" county="Hawkins County" municipality="All" name="Nolichucky Formation" pageId="15" pageNumber="16" stateProvince="Tennessee">Nolichucky Formation</location>
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,
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<location id="8E818AFAFFA0FFC76832E53DFC759319" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC76BD2E2A7FE659591:8E818AFAFFA0FFC76832E53DFC759319" box="[887,1019,261,287]" county="Hawkins County" municipality="All" name="Rogersville" pageId="15" pageNumber="16" stateProvince="Tennessee">Rogersville</location>
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,
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<collectingCounty id="6280A4ADFFA0FFC76F40E53DFB4D9319" box="[1029,1219,261,287]" pageId="15" pageNumber="16">Hawkins County</collectingCounty>
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,
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<collectingRegion id="499A12C3FFA0FFC76F89E53DFAB19319" box="[1228,1343,261,287]" country="United States of America" name="Tennessee" pageId="15" pageNumber="16">Tennessee</collectingRegion>
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(
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<bibRefCitation id="EFCFA1D0FFA0FFC76E08E53DFF5D9345" author="Rasetti, F." pageId="15" pageNumber="16" pagination="1 - 127" refId="ref23892" refString="Rasetti, F. (1965) Upper Cambrian trilobite faunas of Northeastern Tennessee. Smithsonian Miscellaneous Collections, 148, 1 - 127." type="journal article" year="1965">Rasetti 1965</bibRefCitation>
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).
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<location id="8E818AFAFFA0FFC76BA3E511FE9C9345" LSID="urn:lsid:plazi:treatment:03F76D37FFA1FFC76BD2E2A7FE659591:8E818AFAFFA0FFC76BA3E511FE9C9345" box="[230,274,297,323]" county="Hawkins County" municipality="All" name="The" pageId="15" pageNumber="16" stateProvince="Tennessee">The</location>
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<typeStatus id="54E56283FFA0FFC76A5DE511FEF49345" box="[280,378,297,323]" pageId="15" pageNumber="16" type="holotype">holotype</typeStatus>
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cranidium (
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<specimenCode id="DBF8745AFFA0FFC76945E511FD3F9345" box="[512,689,296,323]" 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="15" pageNumber="16" type="Museum">USNM 144599</specimenCode>
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; Pl. 14, figs 1–3) is from collection cnm/2.
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<typeStatus id="54E56283FFA0FFC76FD6E511FB7B9345" box="[1171,1269,297,323]" pageId="15" pageNumber="16" type="paratype">Paratype</typeStatus>
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cranidium and two pygidia (
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<specimenCode id="DBF8745AFFA0FFC76A6AE575FE6C9361" box="[303,482,332,359]" 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="15" pageNumber="16" type="Museum">USNM 144599</specimenCode>
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, Pl. 13, figs 4–6, Pl. 14, figs 4–6) are from collection cnm/2, and a cranidium, pygidium and librigena (
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<specimenCode id="DBF8745AFFA0FFC76ACAE549FDCE938D" box="[399,576,368,395]" 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="15" pageNumber="16" type="Museum">USNM 144598</specimenCode>
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, Pl. 13, figs 1–3, 7–9, Pl. 14, figs 7, 8) from collection cnk/1
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="8BE1DC21FFA0FFC76B82E5ACFDC193D5" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">
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<emphasis id="B92A0033FFA0FFC76B82E5ACFED493A9" bold="true" box="[199,346,404,431]" pageId="15" pageNumber="16">Occurrence.</emphasis>
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<taxonomicName id="4C5EA7A2FFA0FFC76A24E5ADFBAF93A9" authority="Zone, Nolichucky Formation, Hawkins County" authorityName="Zone, Nolichucky Formation, Hawkins County" box="[353,1057,405,431]" class="Trilobita" family="Crepicephalidae" genus="Crepicephalus" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="genus">
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<emphasis id="B92A0033FFA0FFC76A24E5ADFD8D93A9" box="[353,515,405,431]" italics="true" pageId="15" pageNumber="16">Crepicephalus</emphasis>
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Zone, Nolichucky Formation, Hawkins County
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</taxonomicName>
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,
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<collectingRegion id="499A12C3FFA0FFC76F69E5ADFB1193A9" box="[1068,1183,405,431]" country="United States of America" name="Tennessee" pageId="15" pageNumber="16">Tennessee</collectingRegion>
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at
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<bibRefCitation id="EFCFA1D0FFA0FFC76F87E5ADFAFB93A9" author="Rasetti, F." box="[1218,1397,404,431]" pageId="15" pageNumber="16" pagination="1 - 127" refId="ref23892" refString="Rasetti, F. (1965) Upper Cambrian trilobite faunas of Northeastern Tennessee. Smithsonian Miscellaneous Collections, 148, 1 - 127." type="journal article" year="1965">Rasetti’s (1965)</bibRefCitation>
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localities cnk/1, cnm/2, cnn/1, and cnn/3.
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</paragraph>
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</subSubSection>
|
|||
|
|
<subSubSection id="C3448FAAFFA0FFC76B82E5E4FC52940D" pageId="15" pageNumber="16" type="description">
|
|||
|
|
<paragraph id="8BE1DC21FFA0FFC76B82E5E4FA93965D" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76B82E5E4FEDF93F1" bold="true" box="[199,337,476,503]" pageId="15" pageNumber="16">Description</emphasis>
|
|||
|
|
. Cranidium strongly arched, with width at palpebral lobe equal to 87% (86–88) of cranidial length; expands posteriorly, so that width at palpebral lobe equal to 70% (69-73) of maximum width at posterolateral projection.Axial and preglabellar furrows finely etched grooves. Glabella roughly barrel-shaped, with well rounded anterior margin; width at palpebral lobe equal to 74% (72–77) of glabellar length; occupies 80% (79–81) of cranidial length and 67% (66–70) of cranidial width at palpebral lobe. Lateral profile convex, flexed steeply downward anteriorly. Glabella unfurrowed aside from merest hint of SO on some specimens (e.g., Pl. 13, fig. 1). Frontal area with convex anterior border occupying 65% (61–67) of length; anterior border furrow clearly defined, forwardly convex curve. Preglabellar and preocular fields steeply sloping; in lateral view, nearly continuous with slope of anterior part of glabella (e.g., Pl. 14, fig. 2). Palpebral area slopes down from axial furrow, width equal to 24% (20–26; lowest value in largest cranidium, Pl. 14, fig. 1) of glabellar width at palpebral lobe. Palpebral lobe centred in front of glabellar mid-length, equal to 21% (19–23) of glabellar length; palpebral furrow shallow, expressed in part by change in slope of palpebral area at palpebral lobe. Convex, oblique palpebral ridge expressed on some specimens (Pl. 13, fig. 1). Anterior branches of facial sutures nearly parallel between palpebral lobe and border furrow before curving inward along anterior cranidial margin. Posterior branches diverge along curved path, becoming nearly parallel at posterior border. Posterior area flexed steeply downward; posterior margin deflected backward. Shallow posterior border furrow nearly transverse at axial furrow but curves forward distally. Posterior border without independent convexity, expanding distally, with minimum width at axial furrow equal to 25% (18–30; lowest value on smallest cranidium, Pl. 13, fig. 4) of maximum width at sutural margin. External surface of exoskeleton smooth.
|
|||
|
|
</paragraph>
|
|||
|
|
<paragraph id="8BE1DC21FFA0FFC76B82E05DFE7196C1" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">Free cheek with visual surface attached. Weakly inflated librigenal field slopes down to convex lateral border; border furrow well defined groove, shallowing slightly posteriorly. Border with terrace ridges at outer margin; remainder of exoskeleton smooth.</paragraph>
|
|||
|
|
<paragraph id="8BE1DC21FFA0FFC76B82E0E9FC52940D" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">Pygidium semielliptical in outline, length equal to 61% (60–62) of maximum length; articulating facet at anteri- or corner. Axial furrows distinct grooves, shallowing somewhat posteriorly. Axis convex, tapering gently backward, width at first ring equal to 29% (28–29) of maximum pygidial width; occupies 82% (80–84) of pygidial length. Axial rings and ring furrows faint on external surface of exoskeleton (Pl. 13, figs 7–9), but expressed clearly on internal mould (Pl. 14, figs 5, 6). Seven rings plus terminal piece of at least two segments; transverse rings furrows deepest at axial furrows, shallowing slightly medially. Pleural fields gently convex. External surface with shallow pleural furrow at anterior; other furrows barely perceptible. Internal mould with faint, oblique pleural furrows. Border furrow shallow on external surface of exoskeleton; border slopes downward, maintains nearly even width. External surface smooth aside from a few terrace ridges at pygidal margin.</paragraph>
|
|||
|
|
</subSubSection>
|
|||
|
|
<subSubSection id="C3448FAAFFA0FFC76B82E22CFE659591" pageId="15" pageNumber="16" type="discussion">
|
|||
|
|
<paragraph id="8BE1DC21FFA0FFC76B82E22CFC7A94B9" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76B82E22CFECB9429" bold="true" box="[199,325,1556,1583]" pageId="15" pageNumber="16">Discussion</emphasis>
|
|||
|
|
. The combination of a short frontal area, parallel anterior branches of the facial sutures, and a very narrow (tr.) palpebral area of the fixigenae separates cranidia of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC7682DE202FB909455" authorityName="Westrop & Eoff" authorityYear="2020" box="[872,1054,1593,1619]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="tennesseensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC7682DE202FCF79455" box="[872,889,1594,1619]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC768C2E202FB909455" box="[903,1054,1594,1619]" italics="true" pageId="15" pageNumber="16">tennesseensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
(Pl. 13, figs 1–6, Pl. 14, figs 1–3) from those of other species of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76AA3E265FDC89471" authorityName="Walcott" authorityYear="1916" box="[486,582,1629,1655]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="genus">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76AA3E265FDC89471" box="[486,582,1629,1655]" italics="true" pageId="15" pageNumber="16">Blountia</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
. The pygidia (Pl. 13, figs 7–9, Pl. 14, figs 1–3) are most like those of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76E0DE266FECF949D" authorityName="Westrop & Eoff" authorityYear="2020" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="newfoundlandensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76E0DE266FAD79471" box="[1352,1369,1630,1655]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76E23E266FECF949D" italics="true" pageId="15" pageNumber="16">newfoundlandensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
(Pl. 21), which differ in showing adaxial expansion of the border and has a distinct border furrow. The border furrow of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76ACEE29EFDCF94B9" authorityName="Westrop & Eoff" authorityYear="2020" box="[395,577,1701,1727]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="tennesseensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76ACEE29EFE1294B9" box="[395,412,1702,1727]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76AEFE29EFDCF94B9" box="[426,577,1702,1727]" italics="true" pageId="15" pageNumber="16">tennesseensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
is ill defined even in small specimens.
|
|||
|
|
</paragraph>
|
|||
|
|
<paragraph id="8BE1DC21FFA0FFC76B82E2F1FE659591" blockId="15.[151,1437,153,1943]" pageId="15" pageNumber="16">
|
|||
|
|
The cranidium assigned incorrectly to
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC7693DE2F2FCAD94E5" authorityName="Duncan, in Lochman & Duncan" authorityYear="1944" box="[632,803,1737,1763]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="montanensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC7693DE2F2FD0794E5" box="[632,649,1738,1763]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC769D2E2F2FCAD94E5" box="[663,803,1738,1763]" italics="true" pageId="15" pageNumber="16">montanensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
by
|
|||
|
|
<bibRefCitation id="EFCFA1D0FFA0FFC7680BE2F1FC4094E5" author="Pratt, B. R." box="[846,974,1737,1763]" pageId="15" pageNumber="16" pagination="1 - 179" refId="ref23771" refString="Pratt, B. R. (1992) Trilobites of the Marjuman and Steptoean stages (Upper Cambrian), Rabbitkettle Formation, southern Mackenzie Mountains, northwest Canada. Palaeontographica Canadiana, 9, 1 - 179" type="journal article" year="1992">Pratt (1992</bibRefCitation>
|
|||
|
|
, pl. 24, figs 13, 14; see earlier discussion of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76BF2E2D6FEED9501" authorityName="Duncan, in Lochman & Duncan" authorityYear="1944" box="[183,355,1773,1799]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="montanensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76BF2E2D6FF469501" box="[183,200,1774,1799]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76B92E2D6FEED9501" box="[215,355,1774,1799]" italics="true" pageId="15" pageNumber="16">montanensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
) is close to
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76AB5E2D6FD269501" authorityName="Westrop & Eoff" authorityYear="2020" box="[496,680,1773,1799]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="tennesseensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76AB5E2D6FD8F9501" box="[496,513,1774,1799]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76954E2D6FD269501" box="[529,680,1774,1799]" italics="true" pageId="15" pageNumber="16">tennesseensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
in possessing a narrow palpebral area of the fixigena. However, it differs in having a shorter anterior border than both small (Pl. 13, figs 4–6) and large (Pl. 14, figs 1–3) specimens of the latter. The pygidium illustrated by
|
|||
|
|
<bibRefCitation id="EFCFA1D0FFA0FFC76978E30DFD329549" author="Pratt, B. R." box="[573,700,1845,1871]" pageId="15" pageNumber="16" pagination="1 - 179" refId="ref23771" refString="Pratt, B. R. (1992) Trilobites of the Marjuman and Steptoean stages (Upper Cambrian), Rabbitkettle Formation, southern Mackenzie Mountains, northwest Canada. Palaeontographica Canadiana, 9, 1 - 179" type="journal article" year="1992">Pratt (1992</bibRefCitation>
|
|||
|
|
, pl. 24, fig. 15) is smaller than any of the
|
|||
|
|
<typeStatus id="54E56283FFA0FFC76FC7E30DFB339549" box="[1154,1213,1845,1871]" pageId="15" pageNumber="16">types</typeStatus>
|
|||
|
|
of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC76FA5E30EFA1B9549" authorityName="Westrop & Eoff" authorityYear="2020" box="[1248,1429,1845,1871]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="tennesseensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76FA5E30EFB7F9549" box="[1248,1265,1846,1871]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC76FBBE30EFA1B9549" box="[1278,1429,1846,1871]" italics="true" pageId="15" pageNumber="16">tennesseensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
. It has a border that narrows abaxially, whereas the border of
|
|||
|
|
<taxonomicName id="4C5EA7A2FFA0FFC7687FE362FC619575" authorityName="Westrop & Eoff" authorityYear="2020" box="[826,1007,1881,1907]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="tennesseensis">
|
|||
|
|
<emphasis id="B92A0033FFA0FFC7687FE362FCC59575" box="[826,843,1882,1907]" italics="true" pageId="15" pageNumber="16">B</emphasis>
|
|||
|
|
.
|
|||
|
|
<emphasis id="B92A0033FFA0FFC7681DE362FC619575" box="[856,1007,1882,1907]" italics="true" pageId="15" pageNumber="16">tennesseensis</emphasis>
|
|||
|
|
</taxonomicName>
|
|||
|
|
maintains a far more even width (e.g., Pl. 13, figs 7–9; Pl. 14, fig. 4).
|
|||
|
|
</paragraph>
|
|||
|
|
</subSubSection>
|
|||
|
|
</treatment>
|
|||
|
|
</document>
|