183 lines
24 KiB
XML
183 lines
24 KiB
XML
<document id="F60CC4A1CC7C11842DA9914D55565F4E" 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="03F76D37FFB8FFDF6BD2E4A1FBFA9673" 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="Blountina eleanora Lochman, in Lochman & Duncan 1944" docType="treatment" docVersion="4" lastPageNumber="24" 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="24" updateTime="1698776919363" updateUser="plazi">
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<mods:title id="6B86402E28474D03941B312D2C431673">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="88E132383772C95557EB0AA723C51853">Westrop, Madison Armstrong Stephen R.</mods:namePart>
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<mods:namePart id="7A2C88C44F5F45C38A87D212ECF8917D">Eoff, Jennifer D.</mods:namePart>
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<mods:title id="3C0F799F56B518FB27AC8FBF34691BCE">Zootaxa</mods:title>
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<mods:part id="886B344DD1797AA7EF56ED78EAD34F72">
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<mods:date id="637FF452D52AA769D621A4C99E98D528">2020</mods:date>
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<mods:number id="598634A533B94F95C5D5B8170394F54F">2020-06-30</mods:number>
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<mods:number id="CDDDBA5A1AF182D6F9D1969A72F34EE0">4804</mods:number>
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<subSubSection id="C3448FAAFFB8FFDF6BD2E4A1FCF792B5" box="[151,889,153,180]" pageId="23" pageNumber="24" type="nomenclature">
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<paragraph id="8BE1DC21FFB8FFDF6BD2E4A1FCF792B5" blockId="23.[151,889,153,215]" box="[151,889,153,180]" pageId="23" pageNumber="24">
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<heading id="D0A96B4DFFB8FFDF6BD2E4A1FCF792B5" bold="true" box="[151,889,153,180]" fontSize="11" level="1" pageId="23" pageNumber="24" reason="1">
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<taxonomicName id="4C5EA7A2FFB8FFDF6BD2E4A1FCF792B5" authority="Lochman, in Lochman & Duncan, 1944" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[151,889,153,180]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="eleanora">
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<emphasis id="B92A0033FFB8FFDF6BD2E4A1FCF792B5" bold="true" box="[151,889,153,180]" pageId="23" pageNumber="24">
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<emphasis id="B92A0033FFB8FFDF6BD2E4A1FE0D92B2" bold="true" box="[151,387,153,180]" italics="true" pageId="23" pageNumber="24">Blountina eleanora</emphasis>
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Lochman, in
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<bibRefCitation id="EFCFA1D0FFB8FFDF696AE4A2FCF792B5" author="Lochman, C. & Duncan, D." box="[559,889,153,180]" pageId="23" pageNumber="24" 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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</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="C3448FAAFFB8FFDF6BD2E485FA19933F" pageId="23" pageNumber="24" type="description">
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<paragraph id="8BE1DC21FFB8FFDF6BD2E485FEA992D1" blockId="23.[151,889,153,215]" box="[151,295,189,215]" pageId="23" pageNumber="24">
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<figureCitation id="1365C0A4FFB8FFDF6BD2E485FF7192D1" box="[151,255,189,215]" captionStart="PLATE 26" captionStartId="76.[151,234,1897,1922]" captionText="PLATE 26. Blountina eleanora Lochman, in Lochman & Duncan, 1944, Pilgrim Formation, Half Moon Pass, Big Snowy Mountains, Montana. 1–3. Cranidium, holotype, USNM 127156, dorsal, lateral and anterior views, x16 (illustrated by Lochman & Duncan, 1944, pl. 8, figs 37, 40). 4–6. Cranidium, paratype, USNM 127158, lateral, anterior and dorsal views, x16 (previously unillustrated). 7–9. Cranidium, paratype, USNM 127158, anterior, dorsal and lateral views, x16 (previously unillustrated). 10. Librigena, paratype, USNM 127157a, dorsal view, x14 (illustrated by Lochman & Duncan, 1944, pl. 8, fig. 36)." pageId="23" pageNumber="24">Plates 26</figureCitation>
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,
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<figureCitation id="1365C0A4FFB8FFDF6A4EE485FEA992D1" box="[267,295,189,215]" captionStart="PLATE 27" captionStartId="78.[151,234,1839,1864]" captionText="PLATE 27. Blountina eleanora Lochman, in Lochman & Duncan, 1944, Pilgrim Formation, Half Moon Pass, Big Snowy Mountains, Montana. 1–3. Pygidium, paratype, USNM 127157b, dorsal, posterior and lateral views, x14 (illustrated by Lochman & Duncan 1944, pl. 8, figs 38, 39). 4. Pygidium, paratype, USNM 127158, dorsal view, x18. 5. Pygidium, paratype, USNM 127158, dorsal view, x30. 6, 7. Pygidium, paratype, USNM 127157c, dorsal and posterior views, x20 (illustrated by Lochman & Duncan 1944, pl. 8, fig. 35). 8, 9. Pygidium, paratype, USNM 127158, dorsal and posterior views, x18. 10. Pygidium, paratype, USNM 127158, dorsal view, x18. 11. Pygidium, paratype, USNM 127158, dorsal view, x18." pageId="23" pageNumber="24">27</figureCitation>
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</paragraph>
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<paragraph id="8BE1DC21FFB8FFDF6BD2E53AFC67931C" blockId="23.[151,1431,257,313]" box="[151,1001,257,282]" pageId="23" pageNumber="24">
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1944
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<taxonomicName id="4C5EA7A2FFB8FFDF6B95E53AFD7C931F" authority="Lochman, in Lochman & Duncan" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[208,754,257,282]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="eleanora">
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<emphasis id="B92A0033FFB8FFDF6B95E53AFE1A931C" box="[208,404,258,282]" italics="true" pageId="23" pageNumber="24">Blountina eleanora</emphasis>
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Lochman, in Lochman & Duncan
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</taxonomicName>
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, p. 56, pl. 8, figs 35–40.
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</paragraph>
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<paragraph id="8BE1DC21FFB8FFDF6BD2E519FA19933F" blockId="23.[151,1431,257,313]" box="[151,1431,288,313]" pageId="23" pageNumber="24">
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<emphasis id="B92A0033FFB8FFDF6BD2E519FF33933E" box="[151,189,289,312]" italics="true" pageId="23" pageNumber="24">non</emphasis>
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2000
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<taxonomicName id="4C5EA7A2FFB8FFDF6BB8E518FC9D933E" authority="Lochman, in Lochman & Duncan" authorityName="Lochman, in Lochman & Duncan" box="[253,787,288,313]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="eleanora">
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<emphasis id="B92A0033FFB8FFDF6BB8E518FE3A933E" box="[253,436,288,312]" italics="true" pageId="23" pageNumber="24">Blountia eleanora</emphasis>
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Lochman, in Lochman & Duncan
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</taxonomicName>
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; Stitt & Perfetta, p. 213, figs 11.8–11.13 [=
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<taxonomicName id="4C5EA7A2FFB8FFDF6F8CE518FAAE933E" authorityName="Walcott" authorityYear="1916" box="[1225,1312,288,312]" class="Trilobita" family="Kingstoniidae" genus="Blountia" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="genus">
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<emphasis id="B92A0033FFB8FFDF6F8CE518FAAE933E" box="[1225,1312,288,312]" italics="true" pageId="23" pageNumber="24">Blountia</emphasis>
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</taxonomicName>
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? sp. indet].
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</paragraph>
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||
</subSubSection>
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<subSubSection id="C3448FAAFFB8FFDF6BD2E55EFCCD905F" pageId="23" pageNumber="24" type="diagnosis">
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<paragraph id="8BE1DC21FFB8FFDF6BD2E55EFCCD905F" blockId="23.[151,1437,358,1141]" pageId="23" pageNumber="24">
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<emphasis id="B92A0033FFB8FFDF6BD2E55EFE9C9387" bold="true" box="[151,274,358,385]" pageId="23" pageNumber="24">Diagnosis.</emphasis>
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Frontal area 24% (23–24) of cranidial length (sag.) with steeply sloping preglabellar field. Cranidium is slightly wider than long with evenly rounded anterior margin. Strongly convex glabella with nearly parallel sides, well-rounded front, and shallow occipital furrow expressed on the exoskeleton. Posterolateral projections long, extend to a narrow, tapered point. Semielliptical pygidium has distinct axial furrows that shallow at the terminal piece; pleural and interpleural furrows expressed only on internal mould. Border furrow nearly effaced on external surface, but inner edge of border marked on mould by termination of pleural and interpleural furrows (Pl. 27, fig. 4); border flexed steeply downward. Internal mould with pitted surface.
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</paragraph>
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||
</subSubSection>
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||
<subSubSection id="C3448FAAFFB8FFDF6B82E65AFD14917F" pageId="23" pageNumber="24" type="materials_examined">
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||
<paragraph id="8BE1DC21FFB8FFDF6B82E65AFC809137" blockId="23.[151,1437,358,1141]" pageId="23" pageNumber="24">
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<emphasis id="B92A0033FFB8FFDF6B82E65AFEB8907B" bold="true" box="[199,310,610,637]" pageId="23" pageNumber="24">Material.</emphasis>
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<materialsCitation id="3B36D67CFFB8FFDF6A04E65BFC849137" collectionCode="USNM" county="Pilgrim Formation" location="Big Snowy Mountains" municipality="Half Moon Pass" pageId="23" pageNumber="24" specimenCode="USNM 127156, USNM 127158, USNM 127157" specimenCount="4" stateProvince="Montana" typeStatus="holotype">
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Figured specimens include the
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<typeStatus id="54E56283FFB8FFDF69EEE65BFC83907B" box="[683,781,611,637]" pageId="23" pageNumber="24" type="holotype">holotype</typeStatus>
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cranidium (
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||
<specimenCode id="DBF8745AFFB8FFDF68DEE65BFBDE907B" box="[923,1104,610,637]" 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="23" pageNumber="24" type="Museum">USNM 127156</specimenCode>
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, Pl. 26, figs 1–3), two
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<typeStatus id="54E56283FFB8FFDF6E26E65BFF4990A7" pageId="23" pageNumber="24" type="paratype">paratype</typeStatus>
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cranidia (
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<specimenCode id="DBF8745AFFB8FFDF6A7FE6BFFE6290A7" box="[314,492,646,673]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 26, figs 4–6;
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<specimenCode id="DBF8745AFFB8FFDF69FDE6BFFCE690A7" box="[696,872,646,673]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 26, figs 7–9), one
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<typeStatus id="54E56283FFB8FFDF6F28E6BFFB4390A7" box="[1133,1229,647,673]" pageId="23" pageNumber="24" type="paratype">paratype</typeStatus>
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librigena (
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<specimenCode id="DBF8745AFFB8FFDF6E0CE6BFFF6090C3" 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="23" pageNumber="24" type="Museum">USNM 127157</specimenCode>
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a, Pl. 26, fig. 10), and seven
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<typeStatus id="54E56283FFB8FFDF6971E693FD1A90C3" box="[564,660,683,709]" pageId="23" pageNumber="24" type="paratype">paratype</typeStatus>
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pygidia (
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<specimenCode id="DBF8745AFFB8FFDF6845E693FC3C90C3" box="[768,946,682,709]" 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="23" pageNumber="24" type="Museum">USNM 127157</specimenCode>
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b, Pl. 27, figs 1–3;
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<specimenCode id="DBF8745AFFB8FFDF6FCFE693FAB490C3" box="[1162,1338,682,709]" 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="23" pageNumber="24" type="Museum">USNM 127157</specimenCode>
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c, Pl. 27, figs 6, 7;
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<specimenCode id="DBF8745AFFB8FFDF6A4DE6F7FE3790EF" box="[264,441,718,745]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 27, fig. 4;
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<specimenCode id="DBF8745AFFB8FFDF692DE6F7FC9790EF" box="[616,793,718,745]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 27, fig. 5;
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<specimenCode id="DBF8745AFFB8FFDF688CE6F7FBF490EF" box="[969,1146,718,745]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 27, figs 8, 9;
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<specimenCode id="DBF8745AFFB8FFDF6E0EE6F7FF60910B" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 27, fig. 10;
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<specimenCode id="DBF8745AFFB8FFDF6ADBE6CBFDC3910B" box="[414,589,754,781]" 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="23" pageNumber="24" type="Museum">USNM 127158</specimenCode>
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, Pl. 27, fig. 11) from the
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<collectingCounty id="6280A4ADFFB8FFDF6826E6CBFBB8910B" box="[867,1078,755,781]" pageId="23" pageNumber="24">Pilgrim Formation</collectingCounty>
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,
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<collectingMunicipality id="6B85465BFFB8FFDF6F05E6CBFB7A910B" box="[1088,1268,755,781]" pageId="23" pageNumber="24">Half Moon Pass</collectingMunicipality>
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section (
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<bibRefCitation id="EFCFA1D0FFB8FFDF6E1DE6CBFE0B9137" author="Lochman, C. & Duncan, D." pageId="23" pageNumber="24" 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="8E818AFAFFB8FFDF6ADCE72FFD169137" LSID="urn:lsid:plazi:treatment:03F76D37FFB8FFDF6BD2E4A1FBFA9673:8E818AFAFFB8FFDF6ADCE72FFD169137" box="[409,664,791,817]" county="Pilgrim Formation" municipality="Half Moon Pass" name="Big Snowy Mountains" pageId="23" pageNumber="24" stateProvince="Montana">Big Snowy Mountains</location>
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,
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<collectingRegion id="499A12C3FFB8FFDF69E6E72FFC849137" box="[675,778,791,817]" country="United States of America" name="Montana" pageId="23" pageNumber="24">Montana</collectingRegion>
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</materialsCitation>
|
||
.
|
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</paragraph>
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<paragraph id="8BE1DC21FFB8FFDF6B82E702FD14917F" blockId="23.[151,1437,358,1141]" pageId="23" pageNumber="24">
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<emphasis id="B92A0033FFB8FFDF6B82E702FED49153" bold="true" box="[199,346,826,853]" pageId="23" pageNumber="24">Occurrence.</emphasis>
|
||
<taxonomicName id="4C5EA7A2FFB8FFDF6A25E703FC6E9153" authority="Zone, Pilgrim Formation, Half Moon Pass" authorityName="Zone, Pilgrim Formation, Half Moon Pass" box="[352,992,827,853]" class="Trilobita" family="Crepicephalidae" genus="Crepicephalus" higherTaxonomySource="GBIF,CoL" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B92A0033FFB8FFDF6A25E703FD8C9153" box="[352,514,827,853]" italics="true" pageId="23" pageNumber="24">Crepicephalus</emphasis>
|
||
<materialsCitation id="3B36D67CFFB8FFDF694CE703FC6E9153" box="[521,992,827,853]" location="Big Snowy Mountains" pageId="23" pageNumber="24" specimenCount="1" stateProvince="Montana">Zone, Pilgrim Formation, Half Moon Pass</materialsCitation>
|
||
</taxonomicName>
|
||
section,
|
||
<bibRefCitation id="EFCFA1D0FFB8FFDF6F07E703FA129153" author="Lochman, C. & Duncan, D." box="[1090,1436,827,853]" pageId="23" pageNumber="24" 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>
|
||
horizon 9.2,
|
||
<location id="8E818AFAFFB8FFDF6A60E767FDAA917F" LSID="urn:lsid:plazi:treatment:03F76D37FFB8FFDF6BD2E4A1FBFA9673:8E818AFAFFB8FFDF6A60E767FDAA917F" box="[293,548,863,889]" name="Big Snowy Mountains" pageId="23" pageNumber="24" stateProvince="Montana">Big Snowy Mountains</location>
|
||
,
|
||
<collectingRegion id="499A12C3FFB8FFDF696AE767FD18917F" box="[559,662,863,889]" country="United States of America" name="Montana" pageId="23" pageNumber="24">Montana</collectingRegion>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="C3448FAAFFB8FFDF6B82E7BAFBFA9673" pageId="23" pageNumber="24" type="discussion">
|
||
<paragraph id="8BE1DC21FFB8FFDF6B82E7BAFBFA9673" blockId="23.[151,1437,358,1141]" pageId="23" pageNumber="24">
|
||
<emphasis id="B92A0033FFB8FFDF6B82E7BAFEC2919B" bold="true" box="[199,332,898,925]" pageId="23" pageNumber="24">Discussion.</emphasis>
|
||
<taxonomicName id="4C5EA7A2FFB8FFDF6A11E7BBFDA0919B" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[340,558,899,925]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="eleanora">
|
||
<emphasis id="B92A0033FFB8FFDF6A11E7BBFDA0919B" box="[340,558,899,925]" italics="true" pageId="23" pageNumber="24">Blountina eleanora</emphasis>
|
||
</taxonomicName>
|
||
was reported from the Deadwood Formation of
|
||
<collectingRegion id="499A12C3FFB8FFDF6F11E7BBFB60919B" box="[1108,1262,899,925]" country="United States of America" name="South Dakota" pageId="23" pageNumber="24">South Dakota</collectingRegion>
|
||
by
|
||
<bibRefCitation id="EFCFA1D0FFB8FFDF6E5FE7BBFE9A91C7" author="Stitt, J. H. & Perfetta, P. J." pageId="23" pageNumber="24" pagination="199 - 223" refId="ref24040" refString="Stitt, J. H. & Perfetta, P. J. (2000) Trilobites, biostratigraphy, and lithostratigraphy of the Crepicephalus and Aphelaspis zones, lower Deadwood Formation (Marjuman and Steptoean stages, Upper Cambrian), Black Hills, South Dakota. Journal of Paleontology, 74, 199 - 223. https: // doi. org / 10.1017 / S 0022336000031437" type="journal article" year="2000">Stitt & Perfetta (2000</bibRefCitation>
|
||
, figs 11.8–11.13), but comparison with the
|
||
<typeStatus id="54E56283FFB8FFDF69BBE79FFCB791C7" box="[766,825,935,961]" pageId="23" pageNumber="24">types</typeStatus>
|
||
(Pls 26, 27) shows that their specimens are misidentified. As far can be determined from their very small images, the cranidia have very short frontal areas that lack preglabellar fields. The palpebral lobes are located farther forward than in
|
||
<taxonomicName id="4C5EA7A2FFB8FFDF68A4E7C8FBEB960F" authorityName="Lochman, in Lochman & Duncan" authorityYear="1944" box="[993,1125,1007,1033]" class="Trilobita" family="Asaphiscidae" genus="Blountina" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ptychopariida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="eleanora">
|
||
<emphasis id="B92A0033FFB8FFDF68A4E7C8FC7C960F" box="[993,1010,1008,1033]" italics="true" pageId="23" pageNumber="24">B</emphasis>
|
||
.
|
||
<emphasis id="B92A0033FFB8FFDF6F44E7D7FBEB960F" box="[1025,1125,1007,1033]" italics="true" pageId="23" pageNumber="24">eleanora</emphasis>
|
||
</taxonomicName>
|
||
, and the posterior branches of the facial sutures are less divergent, so that the posterolateral projections tapers (exsag., tr.) more rapidly. The associated pygidia (
|
||
<bibRefCitation id="EFCFA1D0FFB8FFDF6A31E00FFDE69657" author="Stitt, J. H. & Perfetta, P. J." box="[372,616,1079,1105]" pageId="23" pageNumber="24" pagination="199 - 223" refId="ref24040" refString="Stitt, J. H. & Perfetta, P. J. (2000) Trilobites, biostratigraphy, and lithostratigraphy of the Crepicephalus and Aphelaspis zones, lower Deadwood Formation (Marjuman and Steptoean stages, Upper Cambrian), Black Hills, South Dakota. Journal of Paleontology, 74, 199 - 223. https: // doi. org / 10.1017 / S 0022336000031437" type="journal article" year="2000">Stitt & Perfetta, 2000</bibRefCitation>
|
||
, figs 11.11–11.13) are relatively longer and narrower than both small (Pl. 27, fig. 5) and larger (Pl. 27, fig. 1) specimens from
|
||
<bibRefCitation id="EFCFA1D0FFB8FFDF69A4E063FBA49673" author="Lochman, C. & Duncan, D." box="[737,1066,1115,1141]" pageId="23" pageNumber="24" 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’s (1944)</bibRefCitation>
|
||
<typeStatus id="54E56283FFB8FFDF6F74E063FBFE9673" box="[1073,1136,1115,1141]" pageId="23" pageNumber="24">types</typeStatus>
|
||
.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |