treatments-xml/data/3B/79/54/3B7954795D7C9F3863F0F8E5FDC3652B.xml
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<subSubSection id="FBCAB6E45D7C9F3763F0F8E5FD98676D" pageId="23" pageNumber="24" type="nomenclature">
<paragraph id="B36FE56F5D7C9F3763F0F8E5FD87674C" blockId="23.[151,602,1858,1917]" box="[151,581,1858,1884]" pageId="23" pageNumber="24">
<heading id="E82752035D7C9F3763F0F8E5FD87674C" bold="true" box="[151,581,1858,1884]" fontSize="11" level="1" pageId="23" pageNumber="24" reason="1">
<taxonomicName id="74D09EEC5D7C9F3763F0F8E5FD87674C" ID-CoL="4P5GX" authority="Shaw, 1974" authorityName="Shaw" authorityYear="1974" box="[151,581,1858,1884]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D7C9F3763F0F8E5FD87674C" bold="true" box="[151,581,1858,1884]" pageId="23" pageNumber="24">
<emphasis id="81A4397D5D7C9F3763F0F8E5FE71674C" bold="true" box="[151,435,1858,1884]" italics="true" pageId="23" pageNumber="24">Pseudoolenoides derbyi</emphasis>
<bibRefCitation id="D741989E5D7C9F3762DDF8E5FD87674C" author="Shaw, F. C." box="[442,581,1858,1884]" pageId="23" pageNumber="24" pagination="1 - 54" refId="ref35027" refString="Shaw, F. C. (1974) Simpson Group (Middle Ordovician) trilobites of Oklahoma. Paleontological Society Memoir, 6, 1 - 54." type="journal article" year="1974">Shaw, 1974</bibRefCitation>
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="B36FE56F5D7C9F3763F0F8C2FD98676D" blockId="23.[151,602,1858,1917]" box="[151,602,1893,1917]" pageId="23" pageNumber="24">Plate 12, figs 114, 1619, Plates 1315</paragraph>
</subSubSection>
<subSubSection id="FBCAB6E45D7C9F3763A0F801FC4C67CB" pageId="23" pageNumber="24" type="description">
<paragraph id="B36FE56F5D7C9F3763A0F801FC6367AC" blockId="23.[199,929,1958,2011]" box="[199,929,1958,1981]" pageId="23" pageNumber="24">
1974
<taxonomicName id="74D09EEC5D7C9F376234F800FD4767AC" authority="Shaw" authorityName="Shaw" authorityYear="1974" box="[339,645,1958,1981]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D7C9F376234F800FD8767AD" box="[339,581,1959,1981]" italics="true" pageId="23" pageNumber="24">Pseudoolenoides derbyi</emphasis>
Shaw
</taxonomicName>
, p. 26, pl. 1, figs 23, 2528.
</paragraph>
<paragraph id="B36FE56F5D7C9F3763A0F862FC4C67CB" blockId="23.[199,929,1958,2011]" box="[199,910,1989,2011]" pageId="23" pageNumber="24">
1996
<taxonomicName id="74D09EEC5D7C9F376234F862FD4567CB" authority="Shaw" authorityName="Shaw" authorityYear="1974" box="[339,647,1989,2011]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="23" pageNumber="24" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D7C9F376234F862FD8767CB" box="[339,581,1989,2011]" italics="true" pageId="23" pageNumber="24">Pseudoolenoides derbyi</emphasis>
Shaw
</taxonomicName>
; Fortey and Droser, p. 87.
</paragraph>
</subSubSection>
<subSubSection id="FBCAB6E45D739F3863F0FF30FDC76125" pageId="24" pageNumber="25" type="materials_examined">
<paragraph id="B36FE56F5D739F3863F0FF30FDC76125" blockId="24.[151,1436,151,1340]" pageId="24" pageNumber="25">
<emphasis id="81A4397D5D739F3863F0FF30FEC460A0" bold="true" box="[151,262,151,176]" inLineHeading="true" pageId="24" pageNumber="25" reason="1">Material.</emphasis>
<materialsCitation id="03B8EF325D739F386273FF30FDC76125" collectionCode="WSC" collectorName="Assigned &amp; Section N &amp; Oil Creek Formation" country="United States of America" county="Murray County" elevation="49" location="Oil Creek Formation" municipality="Carter County" pageId="24" pageNumber="25" specimenCode="OU 7952, OU 7948-7950, 13961- 13963, 38881, 38884-38886, 38888-38890, 38894, 38897, 38899, 38902, 38904, 38905, 38912, 38914, 38917- 38921, OU 7951" specimenCount="1" stateProvince="Oklahoma" typeStatus="holotype">
<typeStatus id="6C6B5BCD5D739F386273FF30FEBD60BF" box="[276,383,151,175]" pageId="24" pageNumber="25" type="holotype">Holotype</typeStatus>
, cranidium,
<specimenCode id="E3764D145D739F38616EFF30FDB360BF" box="[521,625,151,175]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">OU 7952</specimenCode>
(Pl. 12, figs 1, 4, 7), and assigned specimens
<specimenCode id="E3764D145D739F386715FF30FAE360BF" box="[1138,1313,151,175]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">OU 79487950</specimenCode>
,
<specimenCode id="E3764D145D739F38664AFF30FF2260C1" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">13961 13963</specimenCode>
,
<specimenCode id="E3764D145D739F38638CFF1EFEF160C1" box="[235,307,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38881</specimenCode>
,
<specimenCode id="E3764D145D739F386258FF1EFE1960C1" box="[319,475,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">3888438886</specimenCode>
,
<specimenCode id="E3764D145D739F386280FF1EFD4160C1" box="[487,643,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">3888838890</specimenCode>
,
<specimenCode id="E3764D145D739F3861E8FF1EFD1A60C1" box="[655,728,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38894</specimenCode>
,
<specimenCode id="E3764D145D739F386185FF1EFCE960C1" box="[738,811,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38897</specimenCode>
,
<specimenCode id="E3764D145D739F386050FF1EFCBD60C1" box="[823,895,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38899</specimenCode>
,
<specimenCode id="E3764D145D739F3860EDFF1EFC1160C1" box="[906,979,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38902</specimenCode>
,
<specimenCode id="E3764D145D739F3860B9FF1EFBE460C1" box="[990,1062,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38904</specimenCode>
,
<specimenCode id="E3764D145D739F386755FF1EFBB960C1" box="[1074,1147,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38905</specimenCode>
,
<specimenCode id="E3764D145D739F3867E1FF1EFB0D60C1" box="[1158,1231,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38912</specimenCode>
,
<specimenCode id="E3764D145D739F3867BDFF1EFAE160C1" box="[1242,1315,185,209]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38914</specimenCode>
,
<specimenCode id="E3764D145D739F386649FF1EFF2260E2" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">38917 38921</specimenCode>
, from Section
<collectionCode id="D5C17DAA5D739F3862E4FF7DFE0260E2" box="[387,448,218,242]" country="0" httpUri="http://grbio.org/cool/cnv0-s4bi" name="Westfield State College, Museum and Herbarium" pageId="24" pageNumber="25">WSC</collectionCode>
<quantity id="7428488A5D739F3862A1FF7DFD9460E2" box="[454,598,218,242]" metricMagnitude="1" metricUnit="m" metricValue="4.89" metricValueMax="5.15" metricValueMin="4.63" pageId="24" pageNumber="25" unit="m" value="48.9" valueMax="51.5" valueMin="46.3">
<elevation id="38FD025C5D739F3862A1FF7DFD9460E2" box="[454,598,218,242]" metricMagnitude="1" metricUnit="m" metricValue="4.89" metricValueMax="5.15" metricValueMin="4.63" pageId="24" pageNumber="25" unit="m" value="48.9" valueMax="51.5" valueMin="46.3">46.351.5 m</elevation>
</quantity>
,
<location id="B60FB3B45D739F386106FF7DFC8860E2" LSID="urn:lsid:plazi:treatment:3B7954795D7C9F3863F0F8E5FDC3652B:B60FB3B45D739F386106FF7DFC8860E2" box="[609,842,218,242]" country="United States of America" county="Murray County" municipality="Carter County" name="Oil Creek Formation" pageId="24" pageNumber="25" stateProvince="Oklahoma">
<location id="B60FB3B45D739F386106FF7DFD0D60E2" LSID="urn:lsid:plazi:treatment:3B7954795D7C9F3863F0F8E5FDC3652B:B60FB3B45D739F386106FF7DFD0D60E2" box="[609,719,218,242]" country="United States of America" county="Murray County" municipality="Carter County" name="Oil Creek" pageId="24" pageNumber="25" stateProvince="Oklahoma">Oil Creek</location>
Formation
</location>
(Darriwilian),
<location id="B60FB3B45D739F386094FF7CFB0B60E2" LSID="urn:lsid:plazi:treatment:3B7954795D7C9F3863F0F8E5FDC3652B:B60FB3B45D739F386094FF7CFB0B60E2" box="[1011,1225,218,242]" country="United States of America" county="Murray County" municipality="Carter County" name="West Spring Creek" pageId="24" pageNumber="25" stateProvince="Oklahoma">West Spring Creek</location>
,
<collectingCounty id="5A0E9DE35D739F3867B3FF7CFA4060E2" box="[1236,1410,218,243]" pageId="24" pageNumber="25">Murray County</collectingCounty>
,
<collectingRegion id="71142B8D5D739F3863F0FF5BFECD6104" box="[151,271,252,276]" country="United States of America" name="Oklahoma" pageId="24" pageNumber="25">Oklahoma</collectingRegion>
,
<collectingCountry id="CBC7A5FF5D739F38627EFF5BFE976104" box="[281,341,252,276]" name="United States of America" pageId="24" pageNumber="25">USA</collectingCountry>
.
<collectorName id="1E2580B95D739F386200FF5BFE0D6104" box="[359,463,252,276]" pageId="24" pageNumber="25">Assigned</collectorName>
specimen
<specimenCode id="E3764D145D739F386120FF5BFD736104" box="[583,689,252,276]" collectionCode="OU" country="New Zealand" name="Fossil Catalgoue in the Geology Museum" pageId="24" pageNumber="25">OU 7951</specimenCode>
, from
<collectorName id="1E2580B95D739F38619DFF5BFCAA6103" box="[762,872,252,276]" pageId="24" pageNumber="25">Section N</collectorName>
1
<quantity id="7428488A5D739F3860E2FF5BFC206103" box="[901,994,252,276]" metricMagnitude="2" metricUnit="m" metricValue="1.6149999999999998" pageId="24" pageNumber="25" unit="m" value="161.5">
<elevation id="38FD025C5D739F3860E2FF5BFC206103" box="[901,994,252,276]" metricMagnitude="2" metricUnit="m" metricValue="1.6149999999999998" pageId="24" pageNumber="25" unit="m" value="161.5">161.5 m</elevation>
</quantity>
,
<collectorName id="1E2580B95D739F386089FF5BFB156104" box="[1006,1239,252,276]" pageId="24" pageNumber="25">
<location id="B60FB3B45D739F386089FF5BFB9E6104" LSID="urn:lsid:plazi:treatment:3B7954795D7C9F3863F0F8E5FDC3652B:B60FB3B45D739F386089FF5BFB9E6104" box="[1006,1116,252,276]" country="United States of America" county="Murray County" municipality="Carter County" name="Oil Creek" pageId="24" pageNumber="25" stateProvince="Oklahoma">Oil Creek</location>
Formation
</collectorName>
(Darriwilian),
<collectingMunicipality id="530B7F155D739F3863F0FEBAFEF56125" box="[151,311,285,309]" pageId="24" pageNumber="25">Carter County</collectingMunicipality>
,
<collectingRegion id="71142B8D5D739F386225FEBAFE786125" box="[322,442,285,309]" country="United States of America" name="Oklahoma" pageId="24" pageNumber="25">Oklahoma</collectingRegion>
,
<collectingCountry id="CBC7A5FF5D739F3862A2FEBAFDC36125" box="[453,513,285,309]" name="United States of America" pageId="24" pageNumber="25">USA</collectingCountry>
.
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="FBCAB6E45D739F3863A0FE99FC0C61D1" pageId="24" pageNumber="25" type="diagnosis">
<paragraph id="B36FE56F5D739F3863A0FE99FC0C61D1" blockId="24.[151,1436,151,1340]" pageId="24" pageNumber="25">
<emphasis id="81A4397D5D739F3863A0FE99FE836147" bold="true" box="[199,321,318,343]" inLineHeading="true" pageId="24" pageNumber="25" reason="1">Diagnosis.</emphasis>
Glabella strongly and fairly coarsely tuberculate; line of tubercles on slightly swollen anterior edge of L1; eye ridge very prominent; raised line arc on librigenal field and frontal area surmounted by line of partially merged tubercles; pygidium with four unreleased segments, but pleural spines relatively small; pygidium with strong dorsal convexity, especially of pleurae; posteromedian spine short.
</paragraph>
</subSubSection>
<subSubSection id="FBCAB6E45D739F3863A0FE6BFDC3652B" pageId="24" pageNumber="25" type="discussion">
<paragraph id="B36FE56F5D739F3863A0FE6BFB6862CE" blockId="24.[151,1436,151,1340]" pageId="24" pageNumber="25">
<emphasis id="81A4397D5D739F3863A0FE6BFE8E61F5" bold="true" box="[199,332,460,485]" inLineHeading="true" pageId="24" pageNumber="25" reason="1">Discussion.</emphasis>
<bibRefCitation id="D741989E5D739F38623CFE6AFE3661F5" author="Shaw, F. C." box="[347,500,461,485]" pageId="24" pageNumber="25" pagination="1 - 54" refId="ref35027" refString="Shaw, F. C. (1974) Simpson Group (Middle Ordovician) trilobites of Oklahoma. Paleontological Society Memoir, 6, 1 - 54." type="journal article" year="1974">Shaw's (1974</bibRefCitation>
, p. 26) list of autapomorphic features of
<taxonomicName id="74D09EEC5D739F3860D8FE6AFB0961F5" authorityName="Shaw" authorityYear="1974" box="[959,1227,461,485]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F3860D8FE6AFB0961F5" box="[959,1227,461,485]" italics="true" pageId="24" pageNumber="25">Pseudoolenoides derbyi</emphasis>
</taxonomicName>
is accurate, and is supplemented in the diagnosis above.
<taxonomicName id="74D09EEC5D739F386130FE57FCA46218" authorityName="Shaw" authorityYear="1974" box="[599,870,496,520]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F386130FE57FCA46218" box="[599,870,496,520]" italics="true" pageId="24" pageNumber="25">Pseudoolenoides derbyi</emphasis>
</taxonomicName>
is a distinctive species with its combination of a strongly tuberculate glabella with mostly nontuberculate fixigenae and librigenae and a raised librigenal field/ frontal area arc that features aligned, partially merged tubercles. Parsimony analysis retrieves it as sister to a clade including
<taxonomicName id="74D09EEC5D739F38626AFDFBFE626263" authorityName="Hintze" authorityYear="1953" box="[269,416,603,627]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="acicaudus">
<emphasis id="81A4397D5D739F38626AFDFBFE626263" box="[269,416,603,627]" italics="true" pageId="24" pageNumber="25">P. acicaudus</emphasis>
</taxonomicName>
,
<taxonomicName id="74D09EEC5D739F3862D3FDFBFDA56263" authorityName="Adrain &amp; Karim" authorityYear="2012" box="[436,615,603,627]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="oilcreekensis">
<emphasis id="81A4397D5D739F3862D3FDFBFDA56263" box="[436,615,603,627]" italics="true" pageId="24" pageNumber="25">P. oilcreekensis</emphasis>
</taxonomicName>
,
<taxonomicName id="74D09EEC5D739F38611CFDFBFCBB6263" authorityName="Adrain &amp; Karim" authorityYear="2012" box="[635,889,603,627]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="fossilmountainensis">
<emphasis id="81A4397D5D739F38611CFDFBFCBB6263" box="[635,889,603,627]" italics="true" pageId="24" pageNumber="25">P. fossilmountainensis</emphasis>
</taxonomicName>
, and
<taxonomicName id="74D09EEC5D739F3860A4FDFBFB9D6263" authorityName="Shaw" authorityYear="1974" box="[963,1119,604,627]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="carterensis">
<emphasis id="81A4397D5D739F3860A4FDFBFB9D6263" box="[963,1119,604,627]" italics="true" pageId="24" pageNumber="25">P. carterensis</emphasis>
</taxonomicName>
(
<figureCitation id="2BEBF9EA5D739F386713FDFCFB7D6263" box="[1140,1215,603,627]" captionStart="FIGURE 3" captionStartId="5.[151,250,1810,1833]" captionTargetBox="[151,1434,1397,1770]" captionTargetId="figure-778@5.[148,1434,1397,1774]" captionTargetPageId="5" captionText="FIGURE 3. Single most parsimonious tree resulting from analysis of the matrix of Table 1. Length = 36; c.i. = 0.91; r.i. = 0.95. Open circles are characters containing homoplasy. Character optimizations are shown carried out under the ACCTRAN assumption. Upper values at nodes are Bremer support values. Lower values at nodes are bootstrapping GC scores." pageId="24" pageNumber="25">Fig. 3</figureCitation>
). The tuberculate glabella of
<taxonomicName id="74D09EEC5D739F386278FD27FE496287" authorityName="Shaw" authorityYear="1974" box="[287,395,639,663]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F386278FD27FE496287" box="[287,395,639,663]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
is a plesiomorphic feature and is transformed in the more derived group to a sculpture composed entirely of raised lines.
<taxonomicName id="74D09EEC5D739F386178FD04FCEE62AB" authorityName="Shaw" authorityYear="1974" box="[543,812,675,699]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F386178FD04FCEE62AB" box="[543,812,675,699]" italics="true" pageId="24" pageNumber="25">Pseudoolenoides derbyi</emphasis>
</taxonomicName>
also retains a forward eye position whereas the derived group are characterized by a posteriorly placed eye (though this is reversed in
<taxonomicName id="74D09EEC5D739F386764FD60FB5B62CE" authorityName="Shaw" authorityYear="1974" box="[1027,1177,711,734]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="carterensis">
<emphasis id="81A4397D5D739F386764FD60FB5B62CE" box="[1027,1177,711,734]" italics="true" pageId="24" pageNumber="25">P. carterensis</emphasis>
</taxonomicName>
).
</paragraph>
<paragraph id="B36FE56F5D739F3863A0FD4EFAD26476" blockId="24.[151,1436,151,1340]" pageId="24" pageNumber="25">
Among known species,
<taxonomicName id="74D09EEC5D739F3862B0FD4DFDFC6312" authorityName="Shaw" authorityYear="1974" box="[471,574,746,770]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F3862B0FD4DFDFC6312" box="[471,574,746,770]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
is most similar to
<taxonomicName id="74D09EEC5D739F386068FD4DFC5C6312" authorityName="Hintze" authorityYear="1953" box="[783,926,746,770]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="acicaudus">
<emphasis id="81A4397D5D739F386068FD4DFC5C6312" box="[783,926,746,770]" italics="true" pageId="24" pageNumber="25">P. acicaudus</emphasis>
</taxonomicName>
, which is retrieved as the basal species of its derived sister group. Pygidia of the species are closely comparable, except that those of
<taxonomicName id="74D09EEC5D739F3867F4FCA9FAE06335" authorityName="Hintze" authorityYear="1953" box="[1171,1314,781,805]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="acicaudus">
<emphasis id="81A4397D5D739F3867F4FCA9FAE06335" box="[1171,1314,781,805]" italics="true" pageId="24" pageNumber="25">P. acicaudus</emphasis>
</taxonomicName>
feature an extra unreleased segment, have slightly longer pleural spines, have a completely smooth axis versus a sculpture of subdued scattered small tubercles, and have an apparently longer posteromedian spine, though this structure is broken at the base in most specimens of
<taxonomicName id="74D09EEC5D739F386138FCDEFD046380" authorityName="Shaw" authorityYear="1974" box="[607,710,888,912]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F386138FCDEFD046380" box="[607,710,888,912]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
(but see the internal mold of Pl. 15, fig. 14, which seems to give an indication of a short, narrow spine). Librigenae differ in that those of
<taxonomicName id="74D09EEC5D739F38608BFC3BFB9763A4" authorityName="Shaw" authorityYear="1974" box="[1004,1109,924,948]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F38608BFC3BFB9763A4" box="[1004,1109,924,948]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
have an acute versus obtuse angle between the rear margin of the posterior border and the inner margin of the genal spine, have a distinctly broader field with a prominent tuberculate raised arc versus very subdued and non-tuberculate sculpture, have a posterior border that widens versus narrows adaxially, and which appears to lack the posterior point at the contact with the facial suture seen in
<taxonomicName id="74D09EEC5D739F38629BFB8CFD4C6452" authorityName="Hintze" authorityYear="1953" box="[508,654,1066,1090]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="acicaudus">
<emphasis id="81A4397D5D739F38629BFB8CFD4C6452" box="[508,654,1066,1090]" italics="true" pageId="24" pageNumber="25">P. acicaudus</emphasis>
</taxonomicName>
. Cranidia are similar in proportions, but differ in the tuberculate sculpture and anterior eye position of
<taxonomicName id="74D09EEC5D739F386158FBE8FD606476" authorityName="Shaw" authorityYear="1974" box="[575,674,1102,1126]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F386158FBE8FD606476" box="[575,674,1102,1126]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
, as well as its somewhat deeper anterior border furrow.
</paragraph>
<paragraph id="B36FE56F5D739F3863A0FBD6FDC3652B" blockId="24.[151,1436,151,1340]" pageId="24" pageNumber="25">
Almost all of the material of this species is from a narrow stratigraphic interval at the West Spring Creek section in Murray County, where its highest occurrence is some 56 metres below the occurrence of
<taxonomicName id="74D09EEC5D739F38679AFB31FA5764BD" authorityName="Shaw" authorityYear="1974" box="[1277,1429,1174,1197]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="carterensis">
<emphasis id="81A4397D5D739F38679AFB31FA5764BD" box="[1277,1429,1174,1197]" italics="true" pageId="24" pageNumber="25">P. carterensis</emphasis>
</taxonomicName>
. The exception is a single cranidium (Pl. 12, figs 11, 12) from a section in Carter County, which
<bibRefCitation id="D741989E5D739F3867A1FB1FFA8D64C0" author="Shaw, F. C." box="[1222,1359,1208,1232]" pageId="24" pageNumber="25" pagination="1 - 54" refId="ref35027" refString="Shaw, F. C. (1974) Simpson Group (Middle Ordovician) trilobites of Oklahoma. Paleontological Society Memoir, 6, 1 - 54." type="journal article" year="1974">Shaw (1974</bibRefCitation>
, p. 26) listed as occurring in the same collection as
<taxonomicName id="74D09EEC5D739F3861C4FB7AFCFF64E4" authorityName="Shaw" authorityYear="1974" box="[675,829,1245,1268]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="carterensis">
<emphasis id="81A4397D5D739F3861C4FB7AFCFF64E4" box="[675,829,1245,1268]" italics="true" pageId="24" pageNumber="25">P. carterensis</emphasis>
</taxonomicName>
. The occurrence seems anomalous, given the wide stratigraphic separation of the species at West Spring Creek, but was taken by
<bibRefCitation id="D741989E5D739F386741FB58FB706507" author="Shaw, F. C." box="[1062,1202,1279,1303]" pageId="24" pageNumber="25" pagination="1 - 54" refId="ref35027" refString="Shaw, F. C. (1974) Simpson Group (Middle Ordovician) trilobites of Oklahoma. Paleontological Society Memoir, 6, 1 - 54." type="journal article" year="1974">Shaw (1974</bibRefCitation>
, p. 26) to indicate a much longer range for
<taxonomicName id="74D09EEC5D739F3862F0FA83FE38652B" authorityName="Shaw" authorityYear="1974" box="[407,506,1315,1339]" class="Trilobita" family="Bathyuridae" genus="Pseudoolenoides" kingdom="Animalia" order="Proetida" pageId="24" pageNumber="25" phylum="Arthropoda" rank="species" species="derbyi">
<emphasis id="81A4397D5D739F3862F0FA83FE38652B" box="[407,506,1315,1339]" italics="true" pageId="24" pageNumber="25">P. derbyi</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>