treatments-xml/data/20/10/87/201087CBFFDABE67FEADF9E1FB47FA35.xml

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<treatment id="201087CBFFDABE67FEADF9E1FB47FA35" ID-DOI="http://doi.org/10.5281/zenodo.14232251" ID-GBIF-Taxon="247601401" ID-Zenodo-Dep="14232251" LSID="urn:lsid:plazi:treatment:201087CBFFDABE67FEADF9E1FB47FA35" httpUri="http://treatment.plazi.org/id/201087CBFFDABE67FEADF9E1FB47FA35" lastPageId="9" lastPageNumber="486" pageId="7" pageNumber="484" scope_class="Cephalopoda" scope_family="Paracenoceratidae" scope_order="Nautilida" scope_subClass="Nautilia" scope_superFamily="Nautiloidea">
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<paragraph id="A80636DDFFDABE69FEADF9E1FD28F9D6" blockId="7.[260,648,1555,1583]" box="[260,648,1555,1583]" pageId="7" pageNumber="484">
<heading id="F34E81B1FFDABE69FEADF9E1FD28F9D6" box="[260,648,1555,1583]" centered="true" fontSize="10" level="2" pageId="7" pageNumber="484" reason="2">
<taxonomicName id="6FB94D5EFFDABE69FEADF9E1FE4EF9D5" authorityName="Branger" authorityYear="2023" box="[260,494,1555,1583]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="7" pageNumber="484" phylum="Mollusca" rank="species" species="minoti" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFDABE69FEADF9E1FE4EF9D5" bold="true" box="[260,494,1555,1583]" italics="true" pageId="7" pageNumber="484">Micronautilus minoti</emphasis>
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<taxonomicNameLabel id="81FE57B4FFDABE69FE5DF9E0FD28F9D6" box="[500,648,1556,1582]" pageId="7" pageNumber="484" rank="species">n. gen., n. sp.</taxonomicNameLabel>
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<subSubSection id="E0A36556FFDABE69FEAFF9C7FCA7F97E" pageId="7" pageNumber="484" type="description">
<paragraph id="A80636DDFFDABE69FEAFF9C7FD25F9B5" blockId="7.[262,645,1587,1614]" box="[262,645,1587,1614]" pageId="7" pageNumber="484">
(
<figureCitation id="30822A58FFDABE69FEA6F9C7FEC6F9B5" box="[271,358,1587,1614]" captionStart-0="FIG" captionStart-1="FIG" captionStart-2="FIG" captionStart-3="FIG" captionStartId-0="4.[132,143,875,892]" captionStartId-1="5.[520,531,1369,1386]" captionStartId-2="6.[132,143,999,1016]" captionStartId-3="6.[813,824,1682,1699]" captionTargetBox-0="[210,1377,214,833]" captionTargetBox-1="[157,1406,214,1322]" captionTargetBox-2="[416,1268,190,982]" captionTargetBox-3="[867,1426,1113,1641]" captionTargetId-0="figure-232@4.[210,840,214,745]" captionTargetId-1="figure-336@5.[698,1267,762,1328]" captionTargetId-2="figure-434@6.[414,983,228,770]" captionTargetId-3="figure-471@6.[811,1456,1090,1587]" captionTargetPageId-0="4" captionTargetPageId-1="5" captionTargetPageId-2="6" captionTargetPageId-3="6" captionText-0="FIG. 1. — Geographical map reporting the position of the localities that provided specimens of Micronautilus n. gen. Numbers: 1, Buffevent; 2, Saint-Maixentl’École; 3, Sainte-Éanne; 4, Trottebuie; 5, Saint-Gelais; 6, les Lucs; 7, Souché; 8, Jard-sur-Mer. TABLE 1. — Measurements in millimetres for the shells of Micronautilus evolutus n. gen., n. sp." captionText-1="FIG. 2. — Stratigraphic section at Buffevent quarry fromBranger (2009)." captionText-2="FIG. 3. — Suture lines of Micronautilus evolutus n. gen., n. sp. at the end of the phragmocone compared with Pictonautilus Branger, 2004 and Pseudaganides Spath, 1927: A-C, Micronautilus evolutus n. gen., n. sp.; D, Pictonautilus verciacensis (Lissajous, 1923), middle Bathonian, Bremeri Zone, Saint-Maixent-l’École (Deux-Sèvres); E, Pseudaganides n. sp. upper Bathonian, Retrocostatum Zone, Aiffres, Deux-Sèvres." captionText-3="FIG. 4. — Measurement of the septal spacing in the studied Micronautilus n. gen. Scale bar: 1 cm." pageId="7" pageNumber="484">Figs 1-4</figureCitation>
; 
<figureCitation id="30822A58FFDABE69FEDDF9C0FE22F9B6" box="[372,386,1588,1614]" captionStart="FIG" captionStartId="9.[132,143,1095,1112]" captionTargetBox="[408,1160,205,1064]" captionTargetId="graphics-461@9.[428,1160,214,1053]" captionText="FIG. 7. — Origin and evolution of Micronautilus n. gen. and Pictonautilus (Branger, 2004) are likely to occur from the ‘Cenoceras’ fuscum (Crick, 1898) group at the end of Bajocian." pageId="7" pageNumber="484">7</figureCitation>
; Appendices 1F; 3A-D)
</paragraph>
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urn:lsid:zoobank.org:act: 
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<subSubSection id="E0A36556FFDABE69FF2DF943FDC3F8C0" pageId="7" pageNumber="484" type="diagnosis">
<paragraph id="A80636DDFFDABE69FF2DF943FDC3F8C0" blockId="7.[132,777,1719,1848]" pageId="7" pageNumber="484">
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. 
<emphasis id="9ACDEACFFFDABE69FF56F943FEB8F936" box="[255,280,1719,1742]" italics="true" pageId="7" pageNumber="484">—</emphasis>
Small sized and rather compressed 
<taxonomicName id="6FB94D5EFFDABE69FD2AF943FCA9F937" authorityName="Branger" authorityYear="2023" box="[643,777,1719,1743]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="7" pageNumber="484" phylum="Mollusca" rank="genus" status="gen. nov.">
<emphasis id="9ACDEACFFFDABE69FD2AF943FCA9F937" box="[643,777,1719,1743]" italics="true" pageId="7" pageNumber="484">Micronautilus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFDABE69FF2DF926FF69F912" box="[132,201,1746,1770]" pageId="7" pageNumber="484" rank="genus">n. gen.</taxonomicNameLabel>
with a maximum diameter reaching 
<quantity id="6F419B38FFDABE69FD9FF925FD21F911" box="[566,641,1745,1769]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="7" pageNumber="484" unit="mm" value="60.0">60 mm</quantity>
. Shell section is oval on inner whorls becoming subrectangular to subquadrate on full grown individuals. Umbilicus is always open. Septa show a broad and shallow lateral lobe and a ventral lobe.
</paragraph>
</subSubSection>
<subSubSection id="E0A36556FFDABE69FF2DF8A4FBE3FB1B" pageId="7" pageNumber="484" type="materials_examined">
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. — All the samples have been collected within the southern part of the 
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(
<figureCitation id="30822A58FFDABE69FDF0F89EFD33F87A" box="[601,659,1898,1922]" captionStart="FIG" captionStartId="4.[132,143,875,892]" captionTargetBox="[210,1377,214,833]" captionTargetId="figure-232@4.[210,840,214,745]" captionTargetPageId="4" captionText="FIG. 1. — Geographical map reporting the position of the localities that provided specimens of Micronautilus n. gen. Numbers: 1, Buffevent; 2, Saint-Maixentl’École; 3, Sainte-Éanne; 4, Trottebuie; 5, Saint-Gelais; 6, les Lucs; 7, Souché; 8, Jard-sur-Mer. TABLE 1. — Measurements in millimetres for the shells of Micronautilus evolutus n. gen., n. sp." pageId="7" pageNumber="484">Fig. 1</figureCitation>
). 
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<specimenCode id="F81F9EA6FFDABE69FF2FF870FE85F864" box="[134,293,1924,1948]" pageId="7" pageNumber="484">2021.BR.N.150</specimenCode>
is from les Lucs (
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, 
<geoCoordinate id="CD8D501AFFDABE69FDFDF870FD64F864" box="[596,708,1924,1948]" degrees="0" direction="west" minutes="25" orientation="longitude" pageId="7" pageNumber="484" precision="15" seconds="31" value="-0.42527777">0°25’31”W</geoCoordinate>
), temporary exposure near Échiré, it is figured in 
<figureCitation id="30822A58FFDABE69FD91F86BFDD1F84F" box="[568,625,1951,1975]" captionStart="FIG" captionStartId="4.[132,143,875,892]" captionTargetBox="[210,1377,214,833]" captionTargetId="figure-232@4.[210,840,214,745]" captionTargetPageId="4" captionText="FIG. 1. — Geographical map reporting the position of the localities that provided specimens of Micronautilus n. gen. Numbers: 1, Buffevent; 2, Saint-Maixentl’École; 3, Sainte-Éanne; 4, Trottebuie; 5, Saint-Gelais; 6, les Lucs; 7, Souché; 8, Jard-sur-Mer. TABLE 1. — Measurements in millimetres for the shells of Micronautilus evolutus n. gen., n. sp." pageId="7" pageNumber="484">Fig. 1</figureCitation>
; 
<figureCitation id="30822A58FFDABE69FDD7F86BFCA4F84F" box="[638,772,1951,1975]" captionStart="APPENDIX" captionStartId="13.[132,144,220,237]" captionTargetId="figure-112@13.[667,1236,836,1386]" captionTargetPageId="13" captionText="APPENDIX 3. — Micronautilus minoti n. gen., n. sp.: A, holotype 2021.BR.N.150, Les Lucs, municipality of Echiré, temporary exposure, lower Bathonian, Zigzag Zone; B, paratype 2021.BR.N.152, Trottebuie quarry, municipality of Mougon, bed 8, lower Bathonian, Zigzag Zone; C, paratype 2021.BR.N.095, Souché, municipality of Niort, temporary roadworks, lower Bathonian, Zigzag Zone; D, paratype 2021.BR.N.042, Trottebuie quarry, bed 8, lower Bathonian, Zigzag Zone. An asterisk (*) marks the beginning of the body chamber. Scale bar: 1 cm." pageId="7" pageNumber="484">Appendix 3A</figureCitation>
.
</materialsCitation>
<materialsCitation id="18D13C80FFDABE69FF2DF84DFED1F814" ID-GBIF-Occurrence="4985331301" location="Mougon commune" pageId="7" pageNumber="484" specimenCode="2021.BR.N.153" specimenCount="1" typeStatus="paratype">
<specimenCount id="BEBFFD54FFDABE69FF2DF84DFF17F829" box="[132,183,1977,2001]" pageId="7" pageNumber="484" type="generic">Eight</specimenCount>
<typeStatus id="7702887FFFDABE69FF15F84EFEB4F82A" box="[188,276,1978,2002]" pageId="7" pageNumber="484">paratypes</typeStatus>
were sampled from various localities. 2021.BR.N.042 (
<figureCitation id="30822A58FFDABE69FF24F820FF68F814" box="[141,200,2004,2028]" captionStart="FIG" captionStartId="6.[813,824,1682,1699]" captionTargetBox="[867,1426,1113,1641]" captionTargetId="figure-471@6.[811,1456,1090,1587]" captionTargetPageId="6" captionText="FIG. 4. — Measurement of the septal spacing in the studied Micronautilus n. gen. Scale bar: 1 cm." pageId="7" pageNumber="484">Fig. 4</figureCitation>
; 
<figureCitation id="30822A58FFDABE69FF7EF820FEC4F814" box="[215,356,2004,2028]" captionStart="APPENDIX" captionStartId="13.[132,144,220,237]" captionTargetId="figure-112@13.[667,1236,836,1386]" captionTargetPageId="13" captionText="APPENDIX 3. — Micronautilus minoti n. gen., n. sp.: A, holotype 2021.BR.N.150, Les Lucs, municipality of Echiré, temporary exposure, lower Bathonian, Zigzag Zone; B, paratype 2021.BR.N.152, Trottebuie quarry, municipality of Mougon, bed 8, lower Bathonian, Zigzag Zone; C, paratype 2021.BR.N.095, Souché, municipality of Niort, temporary roadworks, lower Bathonian, Zigzag Zone; D, paratype 2021.BR.N.042, Trottebuie quarry, bed 8, lower Bathonian, Zigzag Zone. An asterisk (*) marks the beginning of the body chamber. Scale bar: 1 cm." pageId="7" pageNumber="484">Appendix 3D</figureCitation>
),
</materialsCitation>
<materialsCitation id="18D13C80FFDABE69FED0F827FCF1FC68" ID-GBIF-Occurrence="4985331314" box="[377,849,888,2028]" location="Mougon commune" pageId="7" pageNumber="484" specimenCode="2021.BR.N.152" specimenCount="1" typeStatus="paratype">
<specimenCode id="F81F9EA6FFDABE69FED0F827FDBCF813" box="[377,540,2003,2027]" pageId="7" pageNumber="484">2021.BR.N.152</specimenCode>
(
<figureCitation id="30822A58FFDABE69FD87F820FDC9F814" box="[558,617,2004,2028]" captionStart="FIG" captionStartId="5.[520,531,1369,1386]" captionTargetBox="[157,1406,214,1322]" captionTargetId="figure-336@5.[698,1267,762,1328]" captionTargetPageId="5" captionText="FIG. 2. — Stratigraphic section at Buffevent quarry fromBranger (2009)." pageId="7" pageNumber="484">Fig. 2</figureCitation>
; 
<figureCitation id="30822A58FFDABE69FDD1F820FCA0F814" box="[632,768,2004,2028]" captionStart="APPENDIX" captionStartId="13.[132,144,220,237]" captionTargetId="figure-112@13.[667,1236,836,1386]" captionTargetPageId="13" captionText="APPENDIX 3. — Micronautilus minoti n. gen., n. sp.: A, holotype 2021.BR.N.150, Les Lucs, municipality of Echiré, temporary exposure, lower Bathonian, Zigzag Zone; B, paratype 2021.BR.N.152, Trottebuie quarry, municipality of Mougon, bed 8, lower Bathonian, Zigzag Zone; C, paratype 2021.BR.N.095, Souché, municipality of Niort, temporary roadworks, lower Bathonian, Zigzag Zone; D, paratype 2021.BR.N.042, Trottebuie quarry, bed 8, lower Bathonian, Zigzag Zone. An asterisk (*) marks the beginning of the body chamber. Scale bar: 1 cm." pageId="7" pageNumber="484">Appendix 3B</figureCitation>
) and
</materialsCitation>
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<specimenCode id="F81F9EA6FFDABE69FCFEFC8CFC55FC68" box="[855,1013,888,912]" pageId="7" pageNumber="484">2021.BR.N.153</specimenCode>
are from the 
<geologicalTimeScale id="DA99B676FFDABE69FBDEFC8CFAF2FC69" box="[1143,1362,888,913]" pageId="7" pageNumber="484">old Trotte-Buie quarry</geologicalTimeScale>
, 
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,
</materialsCitation>
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<specimenCode id="F81F9EA6FFDABE69FC31FC66FB94FC52" box="[920,1076,914,938]" pageId="7" pageNumber="484">2021.BR.N.095</specimenCode>
(
<figureCitation id="30822A58FFDABE69FBE8FC67FBD6FC53" box="[1089,1142,915,939]" captionStart="FIG" captionStartId="6.[132,143,999,1016]" captionTargetBox="[416,1268,190,982]" captionTargetId="figure-434@6.[414,983,228,770]" captionTargetPageId="6" captionText="FIG. 3. — Suture lines of Micronautilus evolutus n. gen., n. sp. at the end of the phragmocone compared with Pictonautilus Branger, 2004 and Pseudaganides Spath, 1927: A-C, Micronautilus evolutus n. gen., n. sp.; D, Pictonautilus verciacensis (Lissajous, 1923), middle Bathonian, Bremeri Zone, Saint-Maixent-l’École (Deux-Sèvres); E, Pseudaganides n. sp. upper Bathonian, Retrocostatum Zone, Aiffres, Deux-Sèvres." pageId="7" pageNumber="484">Fig. 3</figureCitation>
A-C; 
<figureCitation id="30822A58FFDABE69FB03FC67FA8AFC53" box="[1194,1322,915,939]" captionStart="APPENDIX" captionStartId="13.[132,144,220,237]" captionTargetId="figure-112@13.[667,1236,836,1386]" captionTargetPageId="13" captionText="APPENDIX 3. — Micronautilus minoti n. gen., n. sp.: A, holotype 2021.BR.N.150, Les Lucs, municipality of Echiré, temporary exposure, lower Bathonian, Zigzag Zone; B, paratype 2021.BR.N.152, Trottebuie quarry, municipality of Mougon, bed 8, lower Bathonian, Zigzag Zone; C, paratype 2021.BR.N.095, Souché, municipality of Niort, temporary roadworks, lower Bathonian, Zigzag Zone; D, paratype 2021.BR.N.042, Trottebuie quarry, bed 8, lower Bathonian, Zigzag Zone. An asterisk (*) marks the beginning of the body chamber. Scale bar: 1 cm." pageId="7" pageNumber="484">Appendix 3C</figureCitation>
) was found in 
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(temporary roadworks near Niort),
</materialsCitation>
<materialsCitation id="18D13C80FFDABE69FB6EFC59FC79FC18" ID-GBIF-Occurrence="4985331315" location="Hauts-de-Rochefort" pageId="7" pageNumber="484" specimenCode="2021.BR.N.135" specimenCount="1" typeStatus="paratype">
<specimenCode id="F81F9EA6FFDABE69FB6EFC59FAC4FC3D" box="[1223,1380,941,965]" pageId="7" pageNumber="484">2021.BR.N.135</specimenCode>
(
<figureCitation id="30822A58FFDABE69FADAFC59FA09FC3D" box="[1395,1449,941,965]" captionStart="FIG" captionStartId="8.[223,234,711,728]" captionTargetBox="[355,1236,218,670]" captionTargetId="graphics-609@8.[445,1223,226,598]" captionTargetPageId="8" captionText="FIG. 6. — Ratio of the width of the umbilicus compared with the size of the shell of Micronautilus evolutus n. gen., n. sp. (2021.BR.N.066)." pageId="7" pageNumber="484">Fig. 6</figureCitation>
; 
<figureCitation id="30822A58FFDABE69FC84FC3CFC0AFC18" box="[813,938,968,992]" captionStart="APPENDIX" captionStartId="11.[132,144,316,333]" captionTargetId="figure-151@11.[748,1286,1040,1602]" captionTargetPageId="11" captionText="APPENDIX 1. — Micronautilus evolutus n. gen., n. sp.: A, holotype 2021.BR.N.103, Buffevent quarry, bed 8, upper Bathonian, Retrocostatum Zone,Hannoveranus horizon;B, paratype 2021.BR.N.091, Buffevent quarry,top of bed 8, upper Bathonian, Retrocostatum Zone, Hannoveranus horizon;C, paratype 2021.BR.N.138, Buffevent quarry,bed 8, upper Bathonian,Retrocostatum Zone,Hannoveranus horizon.The smallest adult with approximated septas;D, paratype 2021.BR.N.066, Saint-Maixent-l’École, upper Bathonian,base of the Retrocostatum Zone; E, paratype 2021.BR.N.136, Buffevent quarry, bed 3, middle Bathonian, Bremeri Zone, Fortecostatum horizon; F, Micronautilus minoti n. gen., n. sp. paratype 2021.BR.N.135, les Hauts-de-Rochefort (Sainte-Éanne quarry), middle Bathonian, Progracilis Zone, Orbignyi horizon. An asterisk (*) marks the beginning of the body chamber. Scale bar: 1 cm." pageId="7" pageNumber="484">Appendix 1F</figureCitation>
) and
</materialsCitation>
<materialsCitation id="18D13C80FFDABE69FC77FC33FB96FC02" ID-GBIF-Occurrence="4985331311" location="Hauts-de-Rochefort" pageId="7" pageNumber="484" specimenCode="2021.BR.N.151" specimenCount="1" typeStatus="paratype">
<specimenCode id="F81F9EA6FFDABE69FC77FC33FBDBFC27" box="[990,1147,967,991]" pageId="7" pageNumber="484">2021.BR.N.151</specimenCode>
come from les 
<location id="AD666006FFDABE69FAA0FC3CFCF1FC02" LSID="urn:lsid:plazi:treatment:201087CBFFDABE67FEADF9E1FB47FA35:AD666006FFDABE69FAA0FC3CFCF1FC02" latitude="46.3575" longLatPrecision="18" longitude="-0.42527777" name="Hauts-de-Rochefort" pageId="7" pageNumber="484">Hauts-de-Rochefort</location>
(
<geologicalTimeScale id="DA99B676FFDABE69FCF4FC17FB8BFC02" box="[861,1067,994,1021]" pageId="7" pageNumber="484">Sainte-Éanne quarry</geologicalTimeScale>
),
</materialsCitation>
<materialsCitation id="18D13C80FFDABE69FB95FC16FA0AFC02" ID-GBIF-Occurrence="4985331309" box="[1084,1450,994,1018]" collectionCode="TYPE, MATERIAL, BR" latitude="46.3575" location="Saint-Gelais" longLatPrecision="18" longitude="-0.42527777" pageId="7" pageNumber="484" specimenCode="2021.BR.N.155" specimenCount="1" typeStatus="holotype">
<specimenCode id="F81F9EA6FFDABE69FB95FC16FB7BFC02" box="[1084,1243,994,1018]" pageId="7" pageNumber="484">2021.BR.N.155</specimenCode>
is from 
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.
</materialsCitation>
</paragraph>
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. — Most of the 
<specimenCount id="BEBFFD54FFDABE69FADCFBE6FCC0FBBC" pageId="7" pageNumber="484" type="generic">specimens</specimenCount>
have been collected from the “Banc pourri” (
<bibRefCitation id="CC284B2CFFDABE69FA88FBD8FA01FBBC" author="WELSCH J." box="[1313,1441,1068,1092]" pageId="7" pageNumber="484" pagination="797 - 881" refId="ref6409" refString="WELSCH J. 1903. - Etude des terrains du Poitou dans le Detroit poitevin et sur les bords du Massif ancien de la Gatine: 797 - 881." type="book chapter" year="1903">Welsch 1903</bibRefCitation>
), a stratigraphic level that extends all along the northern border of the 
<location id="AD666006FFDABE69FCFCFB95FC55FB81" LSID="urn:lsid:plazi:treatment:201087CBFFDABE67FEADF9E1FB47FA35:AD666006FFDABE69FCFCFB95FC55FB81" box="[853,1013,1121,1145]" name="Aquitaine basin" pageId="7" pageNumber="484">Aquitaine basin</location>
. This level has yielded many ammonites, all of them have been reported from the 
<geologicalTimeScale id="DA99B676FFDABE69FB1FFB8FFAC6FB6B" box="[1206,1382,1147,1171]" pageId="7" pageNumber="484">lower Bathonian,</geologicalTimeScale>
<location id="AD666006FFDABE69FAC7FB8FFCC2FB55" LSID="urn:lsid:plazi:treatment:201087CBFFDABE67FEADF9E1FB47FA35:AD666006FFDABE69FAC7FB8FFCC2FB55" name="Zigzag Zone" pageId="7" pageNumber="484">Zigzag Zone</location>
(
<bibRefCitation id="CC284B2CFFDABE69FCC6FB62FC5FFB56" author="SAUVAGET H." box="[879,1023,1174,1198]" pageId="7" pageNumber="484" refId="ref6206" refString="SAUVAGET H. 1906. - Le Banc Pourri du Poitou et sa faune (Zone a Zigzagiceras zigzag et Parkinsonia ferruginea). Memoires - Societe historique et scientifique des Deux-Sevres, 23 p., 3 pl." type="book" year="1906">Sauvaget 1906</bibRefCitation>
; 
<bibRefCitation id="CC284B2CFFDABE69FBA5FB63FB0EFB56" author="ENAY R. &amp; BRANGER P. &amp; AND BELLIGAUD G." box="[1036,1198,1174,1201]" pageId="7" pageNumber="484" pagination="63 - 70" refId="ref5743" refString="ENAY R., BRANGER P. AND BELLIGAUD G. 2012. - Un nouveau temoin des apports sud-tethysiens dans le Poitou: une espece de Micromphalites d'origine arabique pres de Niort, France. Revue de Paleobiologie 31 (1): 63 - 70." type="journal article" year="2012">
Énay 
<emphasis id="9ACDEACFFFDABE69FBECFB63FBD4FB56" box="[1093,1140,1174,1198]" italics="true" pageId="7" pageNumber="484">et al.</emphasis>
2012
</bibRefCitation>
). A single example, 2021. 
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.N.135, a little younger, middle Bathonian, Progracilis Zone, is assigned to the same species.
</paragraph>
</subSubSection>
<subSubSection id="E0A36556FFDABE69FC84FB0FFBCAFAEA" box="[813,1130,1274,1299]" pageId="7" pageNumber="484" type="description">
<paragraph id="A80636DDFFDABE69FC84FB0FFBCAFAEA" blockId="7.[813,1130,1274,1299]" box="[813,1130,1274,1299]" pageId="7" pageNumber="484">
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. 
<emphasis id="9ACDEACFFFDABE69FC7EFB0FFC50FAEA" box="[983,1008,1275,1298]" italics="true" pageId="7" pageNumber="484">—</emphasis>
See 
<tableCitation id="E53B0366FFDABE69FBB5FB0EFBCAFAEA" box="[1052,1130,1274,1299]" captionStart="TABLE" captionStartId="8.[414,425,807,824]" captionTargetBox="[355,1236,218,670]" captionTargetId="graphics-609@8.[445,1223,226,598]" captionText="TABLE 2. — Measurements in millimetres for the shells of Micronautilus minoti n. gen., n. sp." pageId="7" pageNumber="484">Table 2.</tableCitation>
</paragraph>
</subSubSection>
<subSubSection id="E0A36556FFDABE69FC84FADFFB57FA69" pageId="7" pageNumber="484" type="etymology">
<paragraph id="A80636DDFFDABE69FC84FADFFB57FA69" blockId="7.[811,1456,1322,1426]" pageId="7" pageNumber="484">
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. — The specific name 
<taxonomicName id="6FB94D5EFFDABE69FBDBFADFFB0FFABA" authorityName="Branger" authorityYear="2023" box="[1138,1199,1323,1346]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="7" pageNumber="484" phylum="Mollusca" rank="species" species="minoti">
<emphasis id="9ACDEACFFFDABE69FBDBFADFFB0FFABA" box="[1138,1199,1323,1346]" italics="true" pageId="7" pageNumber="484">minoti</emphasis>
</taxonomicName>
is dedicated to Jean-Michel Minot, an amateur paleontologist who published the first exhaustive monograph on brachiopods from Western 
<collectingCountry id="D0AE764DFFDABE69FB15FA94FB5CFA8F" box="[1212,1276,1376,1399]" name="France" pageId="7" pageNumber="484">France</collectingCountry>
(
<bibRefCitation id="CC284B2CFFDABE69FAA0FAABFCFEFA6A" author="MINOT J. M. &amp; BRANGER P." pageId="7" pageNumber="484" refId="ref6053" refString="MINOT J. M. &amp; BRANGER P. 2007. - Les Brachiopodes du Jurassique du Poitou, ce petit patrimoine ancestral sous nos pieds. DSNE-APGP Editions, Niort, 256 p." type="book" year="2007">Minot &amp; Branger 2007</bibRefCitation>
) and collected some interesting nautilids.
</paragraph>
</subSubSection>
<subSubSection id="E0A36556FFDABE69FC84FA40FAD2F8B4" pageId="7" pageNumber="484" type="description">
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</paragraph>
<paragraph id="A80636DDFFDABE69FC84FA27FAD2F8B4" blockId="7.[811,1457,1460,1869]" pageId="7" pageNumber="484">
Small sized nautilus, maximum diameter observed is about 
<quantity id="6F419B38FFDABE69FC87FA07FC22F9F6" box="[814,898,1523,1550]" metricMagnitude="-2" metricUnit="m" metricValue="6.0" pageId="7" pageNumber="484" unit="mm" value="60.0">60 mm</quantity>
. The section of the shell is compressed, oval on the phragmocone. It widens on the body chamber where the width can exceed slightly the height (W/H = 1.06 on 2021. BR.N.095), getting rectangular, sometimes quadrate. Venter is rounded on the inner whorls but flattens as the animal becomes adult. The umbilicus is always open (U/D = 0.15) but narrower than on 
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<emphasis id="9ACDEACFFFDABE69FB8AF946FAB1F934" box="[1059,1297,1714,1740]" italics="true" pageId="7" pageNumber="484">Micronautilus evolutus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFDABE69FAB1F947FA10F935" box="[1304,1456,1715,1741]" pageId="7" pageNumber="484" rank="species">n. gen., n. sp.</taxonomicNameLabel>
with an umbilical wall that is subvertical at any stage. The suture line shows a broad and shallow lateral lobe whereas the ventral lobe is faint but clearly visible, at least from a diameter of 
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. Each half of a whorl shows nine chambers.
</paragraph>
</subSubSection>
<subSubSection id="E0A36556FFDABE67FC84F886FB47FA35" lastPageId="9" lastPageNumber="486" pageId="7" pageNumber="484" type="discussion">
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</paragraph>
<paragraph id="A80636DDFFDABE66FC84F866FE83F915" blockId="7.[812,1455,1906,2028]" lastBlockId="8.[131,777,1491,1773]" lastPageId="8" lastPageNumber="485" pageId="7" pageNumber="484">
<taxonomicName id="6FB94D5EFFDABE69FC84F866FBAFF854" authorityName="Branger" authorityYear="2023" box="[813,1039,1938,1964]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="7" pageNumber="484" phylum="Mollusca" rank="species" species="minoti" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFDABE69FC84F866FBAFF854" box="[813,1039,1938,1964]" italics="true" pageId="7" pageNumber="484">Micronautilus minoti</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFDABE69FBBCF866FB09F854" box="[1045,1193,1938,1964]" pageId="7" pageNumber="484" rank="species">n. gen., n. sp.</taxonomicNameLabel>
has not previously been figured and no former description corresponds to this new species. The shell of 
<taxonomicName id="6FB94D5EFFDABE69FBBAF826FAC1F814" authority="(Crick, 1898)" baseAuthorityName="Crick" baseAuthorityYear="1898" box="[1043,1377,2001,2028]" class="Cephalopoda" family="Cenoceratidae" genus="Cenoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="7" pageNumber="484" phylum="Mollusca" rank="species" species="fuscus">
<emphasis id="9ACDEACFFFDABE69FBBAF826FB1DF814" box="[1043,1213,2002,2028]" italics="true" pageId="7" pageNumber="484">Cenoceras fuscus</emphasis>
(
<bibRefCitation id="CC284B2CFFDABE69FB67F825FAF9F814" author="CRICK G. C." box="[1230,1369,2001,2028]" pageId="7" pageNumber="484" pagination="117 - 139" refId="ref5695" refString="CRICK G. C. 1898. - Descriptions of new or imperfectly known species of Nautilus from the Inferior Oolite, preserved in the British Museum (Natural History). Proceedings of the Malacological Society of London 3: 117 - 139, figs I-XV." type="journal article" year="1898">Crick, 1898</bibRefCitation>
)
</taxonomicName>
, upper Bajocian, is also rather small but larger than 
<taxonomicName id="6FB94D5EFFD5BE66FDDBFA27FF6BF9F5" authorityName="Branger" authorityYear="2023" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="minoti" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFD5BE66FDDBFA27FF6BF9F5" italics="true" pageId="8" pageNumber="485">Micronautilus minoti</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD5BE66FF79FA00FEC1F9F6" box="[208,353,1524,1550]" pageId="8" pageNumber="485" rank="species">n. gen., n. sp.</taxonomicNameLabel>
with an open umbilicus. 
<taxonomicName id="6FB94D5EFFD5BE66FDD9FA07FF78F9D5" authorityName="Branger" authorityYear="2023" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="evolutus" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFD5BE66FDD9FA07FF78F9D5" italics="true" pageId="8" pageNumber="485">Micronautilus evolutus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD5BE66FF76F9E0FED1F9D6" box="[223,369,1556,1582]" pageId="8" pageNumber="485" rank="species">n. gen., n. sp.</taxonomicNameLabel>
possesses a smaller, more compressed shell with a relatively wide umbilicus and more crowded septa. Moreover, its stratigraphical occurrence is younger, namely upper Bathonian. The final two septa in the adult shells of both species are typically approximated with an angular distance lower than 10° instead of 12° to 20° for previous ones.
</paragraph>
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. 6. — Ratio of the width of the umbilicus compared with the size of the shell of 
<taxonomicName id="6FB94D5EFFD5BE66FC26FD33FBE8FD20" authorityName="Branger" authorityYear="2023" box="[911,1096,711,728]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="evolutus" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFD5BE66FC26FD33FBE8FD20" box="[911,1096,711,728]" italics="true" pageId="8" pageNumber="485">Micronautilus evolutus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD5BE66FBE7FD33FB61FD20" box="[1102,1217,711,728]" pageId="8" pageNumber="485" rank="species">n. gen., n. sp.</taxonomicNameLabel>
(2021.BR.N.066).
</paragraph>
</caption>
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<paragraph id="A80636DDFFD5BE66FE37FCD3FB37FCC0" blockId="8.[414,1175,807,824]" box="[414,1175,807,824]" pageId="8" pageNumber="485">
<smallCapsWord id="AEE0A001FFD5BE66FE37FCD3FE6CFCCF" baselines="820,820" box="[414,460,807,824]" lowerCaseFontSize="5" mainFontSize="7" normCase="title" normString="Table" pageId="8" pageNumber="485">TABLE</smallCapsWord>
2. — Measurements in millimetres for the shells of 
<taxonomicName id="6FB94D5EFFD5BE66FCDEFCD3FBBEFCC0" authorityName="Branger" authorityYear="2023" box="[887,1054,807,824]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="minoti" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFD5BE66FCDEFCD3FBBEFCC0" box="[887,1054,807,824]" italics="true" pageId="8" pageNumber="485">Micronautilus minoti</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD5BE66FB8AFCD3FB37FCC0" box="[1059,1175,807,824]" pageId="8" pageNumber="485" rank="species">n. gen., n. sp.</taxonomicNameLabel>
</paragraph>
</caption>
<paragraph id="A80636DDFFD5BE66FF2FFC87FA25FA6B" pageId="8" pageNumber="485">
<table id="DAB9C47DFFD54191FF2FFC87FA26FA6B" box="[134,1414,883,1427]" gridcols="9" gridrows="19" pageId="8" pageNumber="485">
<tr id="1689349FFFD54191FF2FFC87FA26FC7F" box="[134,1414,883,903]" gridrow="0" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFC87FEB7FC7F" box="[134,279,883,903]" gridcol="0" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FF2FFC87FF09FC7F" bold="true" box="[134,169,883,903]" pageId="8" pageNumber="485">No.</emphasis>
</th>
<th id="55585DE3FFD54191FE7EFC87FDA1FC7F" box="[471,513,883,903]" gridcol="1" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FE4DFC87FE54FC7F" bold="true" box="[484,500,883,903]" pageId="8" pageNumber="485">D</emphasis>
</th>
<th id="55585DE3FFD54191FDF1FC87FD22FC7F" box="[600,642,883,903]" gridcol="2" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FDCCFC87FDD5FC7F" bold="true" box="[613,629,883,903]" pageId="8" pageNumber="485">H</emphasis>
</th>
<th id="55585DE3FFD54191FD71FC87FCA2FC7F" box="[728,770,883,903]" gridcol="3" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FD4EFC87FD54FC7F" bold="true" box="[743,756,883,903]" pageId="8" pageNumber="485">h</emphasis>
</th>
<th id="55585DE3FFD54191FCE4FC87FC23FC7F" box="[845,899,883,903]" gridcol="4" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FCCDFC87FCD8FC7F" bold="true" box="[868,888,883,903]" pageId="8" pageNumber="485">W</emphasis>
</th>
<th id="55585DE3FFD54191FC70FC87FBA3FC7F" box="[985,1027,883,903]" gridcol="5" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FC4CFC87FC56FC7F" bold="true" box="[997,1014,883,903]" pageId="8" pageNumber="485">w</emphasis>
</th>
<th id="55585DE3FFD54191FBFDFC87FBDEFC7F" box="[1108,1150,883,903]" gridcol="6" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FBCEFC87FBD7FC7F" bold="true" box="[1127,1143,883,903]" pageId="8" pageNumber="485">U</emphasis>
</th>
<th id="55585DE3FFD54191FB73FC87FAA4FC7F" box="[1242,1284,883,903]" gridcol="7" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FB40FC87FB56FC7F" bold="true" box="[1257,1270,883,903]" pageId="8" pageNumber="485">u</emphasis>
</th>
<th id="55585DE3FFD54191FAF0FC87FA26FC7F" box="[1369,1414,883,903]" gridcol="8" gridrow="0" pageId="8" pageNumber="485">
<emphasis id="9ACDEACFFFD5BE66FAF3FC87FA26FC7F" bold="true" box="[1370,1414,883,903]" pageId="8" pageNumber="485">W/H</emphasis>
</th>
</tr>
<tr id="1689349FFFD54191FF2FFC62FA26FC52" box="[134,1414,918,938]" gridrow="1" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFC62FEB7FC52" box="[134,279,918,938]" gridcol="0" gridrow="1" pageId="8" pageNumber="485">2021.BR.N.042</th>
<td id="55585DE3FFD54191FE7EFC62FDA1FC52" box="[471,513,918,938]" gridcol="1" gridrow="1" pageId="8" pageNumber="485">37</td>
<td id="55585DE3FFD54191FDF1FC62FD22FC52" box="[600,642,918,938]" gridcol="2" gridrow="1" pageId="8" pageNumber="485">21</td>
<td id="55585DE3FFD54191FD71FC62FCA2FC52" box="[728,770,918,938]" gridcol="3" gridrow="1" pageId="8" pageNumber="485">0.56</td>
<td id="55585DE3FFD54191FCE4FC62FC23FC52" box="[845,899,918,938]" gridcol="4" gridrow="1" pageId="8" pageNumber="485">16</td>
<td id="55585DE3FFD54191FC70FC62FBA3FC52" box="[985,1027,918,938]" gridcol="5" gridrow="1" pageId="8" pageNumber="485">0.43</td>
<td id="55585DE3FFD54191FBFDFC62FBDEFC52" box="[1108,1150,918,938]" gridcol="6" gridrow="1" pageId="8" pageNumber="485">5.4</td>
<td id="55585DE3FFD54191FB73FC62FAA4FC52" box="[1242,1284,918,938]" gridcol="7" gridrow="1" pageId="8" pageNumber="485">0.14</td>
<td id="55585DE3FFD54191FAF0FC62FA26FC52" box="[1369,1414,918,938]" gridcol="8" gridrow="1" pageId="8" pageNumber="485">0.76</td>
</tr>
<tr id="1689349FFFD54191FF2FFC5AFA26FC3A" box="[134,1414,942,962]" gridrow="2" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFC5AFDA1FC3A" box="[471,513,942,962]" gridcol="1" gridrow="2" pageId="8" pageNumber="485">28.3</td>
<td id="55585DE3FFD54191FDF1FC5AFD22FC3A" box="[600,642,942,962]" gridcol="2" gridrow="2" pageId="8" pageNumber="485">16</td>
<td id="55585DE3FFD54191FD71FC5AFCA2FC3A" box="[728,770,942,962]" gridcol="3" gridrow="2" pageId="8" pageNumber="485">0.56</td>
<td id="55585DE3FFD54191FCE4FC5AFC23FC3A" box="[845,899,942,962]" gridcol="4" gridrow="2" pageId="8" pageNumber="485">13.6</td>
<td id="55585DE3FFD54191FC70FC5AFBA3FC3A" box="[985,1027,942,962]" gridcol="5" gridrow="2" pageId="8" pageNumber="485">0.48</td>
<td id="55585DE3FFD54191FBFDFC5AFBDEFC3A" box="[1108,1150,942,962]" gridcol="6" gridrow="2" pageId="8" pageNumber="485">4</td>
<td id="55585DE3FFD54191FB73FC5AFAA4FC3A" box="[1242,1284,942,962]" gridcol="7" gridrow="2" pageId="8" pageNumber="485">0.14</td>
<td id="55585DE3FFD54191FAF0FC5AFA26FC3A" box="[1369,1414,942,962]" gridcol="8" gridrow="2" pageId="8" pageNumber="485">0.85</td>
</tr>
<tr id="1689349FFFD54191FF2FFC26FA26FC1E" box="[134,1414,978,998]" gridrow="3" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFC26FEB7FC1E" box="[134,279,978,998]" gridcol="0" gridrow="3" pageId="8" pageNumber="485">2021.BR.N.056</th>
<td id="55585DE3FFD54191FE7EFC26FDA1FC1E" box="[471,513,978,998]" gridcol="1" gridrow="3" pageId="8" pageNumber="485">57</td>
<td id="55585DE3FFD54191FDF1FC26FD22FC1E" box="[600,642,978,998]" gridcol="2" gridrow="3" pageId="8" pageNumber="485">29.4</td>
<td id="55585DE3FFD54191FD71FC26FCA2FC1E" box="[728,770,978,998]" gridcol="3" gridrow="3" pageId="8" pageNumber="485">0.51</td>
<td id="55585DE3FFD54191FCE4FC26FC23FC1E" box="[845,899,978,998]" gridcol="4" gridrow="3" pageId="8" pageNumber="485">26</td>
<td id="55585DE3FFD54191FC70FC26FBA3FC1E" box="[985,1027,978,998]" gridcol="5" gridrow="3" pageId="8" pageNumber="485">0.45</td>
<td id="55585DE3FFD54191FBFDFC26FBDEFC1E" box="[1108,1150,978,998]" gridcol="6" gridrow="3" pageId="8" pageNumber="485">8</td>
<td id="55585DE3FFD54191FB73FC26FAA4FC1E" box="[1242,1284,978,998]" gridcol="7" gridrow="3" pageId="8" pageNumber="485">0.14</td>
<td id="55585DE3FFD54191FAF0FC26FA26FC1E" box="[1369,1414,978,998]" gridcol="8" gridrow="3" pageId="8" pageNumber="485">0.88</td>
</tr>
<tr id="1689349FFFD54191FF2FFC1EFA26FC06" box="[134,1414,1002,1022]" gridrow="4" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFC1EFDA1FC06" box="[471,513,1002,1022]" gridcol="1" gridrow="4" pageId="8" pageNumber="485">46</td>
<td id="55585DE3FFD54191FDF1FC1EFD22FC06" box="[600,642,1002,1022]" gridcol="2" gridrow="4" pageId="8" pageNumber="485">25</td>
<td id="55585DE3FFD54191FD71FC1EFCA2FC06" box="[728,770,1002,1022]" gridcol="3" gridrow="4" pageId="8" pageNumber="485">0.54</td>
<td id="55585DE3FFD54191FCE4FC1EFC23FC06" box="[845,899,1002,1022]" gridcol="4" gridrow="4" pageId="8" pageNumber="485">26</td>
<td id="55585DE3FFD54191FC70FC1EFBA3FC06" box="[985,1027,1002,1022]" gridcol="5" gridrow="4" pageId="8" pageNumber="485">0.56</td>
<td id="55585DE3FFD54191FBFDFC1EFBDEFC06" box="[1108,1150,1002,1022]" gridcol="6" gridrow="4" pageId="8" pageNumber="485">4.8</td>
<td id="55585DE3FFD54191FB73FC1EFAA4FC06" box="[1242,1284,1002,1022]" gridcol="7" gridrow="4" pageId="8" pageNumber="485">0.1</td>
<td id="55585DE3FFD54191FAF0FC1EFA26FC06" box="[1369,1414,1002,1022]" gridcol="8" gridrow="4" pageId="8" pageNumber="485">1.04</td>
</tr>
<tr id="1689349FFFD54191FF2FFBF6FA26FBEE" box="[134,1414,1026,1046]" gridrow="5" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFBF6FDA1FBEE" box="[471,513,1026,1046]" gridcol="1" gridrow="5" pageId="8" pageNumber="485">40</td>
<td id="55585DE3FFD54191FDF1FBF6FD22FBEE" box="[600,642,1026,1046]" gridcol="2" gridrow="5" pageId="8" pageNumber="485">23</td>
<td id="55585DE3FFD54191FD71FBF6FCA2FBEE" box="[728,770,1026,1046]" gridcol="3" gridrow="5" pageId="8" pageNumber="485">0.57</td>
<td id="55585DE3FFD54191FCE4FBF6FC23FBEE" box="[845,899,1026,1046]" gridcol="4" gridrow="5" pageId="8" pageNumber="485">19.6</td>
<td id="55585DE3FFD54191FC70FBF6FBA3FBEE" box="[985,1027,1026,1046]" gridcol="5" gridrow="5" pageId="8" pageNumber="485">0.49</td>
<td id="55585DE3FFD54191FBFDFBF6FBDEFBEE" box="[1108,1150,1026,1046]" gridcol="6" gridrow="5" pageId="8" pageNumber="485">3</td>
<td id="55585DE3FFD54191FB73FBF6FAA4FBEE" box="[1242,1284,1026,1046]" gridcol="7" gridrow="5" pageId="8" pageNumber="485">0.07</td>
<td id="55585DE3FFD54191FAF0FBF6FA26FBEE" box="[1369,1414,1026,1046]" gridcol="8" gridrow="5" pageId="8" pageNumber="485">0.85</td>
</tr>
<tr id="1689349FFFD54191FF2FFBD1FA26FBC1" box="[134,1414,1061,1081]" gridrow="6" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFBD1FEB7FBC1" box="[134,279,1061,1081]" gridcol="0" gridrow="6" pageId="8" pageNumber="485">2021.BR.N.095</th>
<td id="55585DE3FFD54191FE7EFBD1FDA1FBC1" box="[471,513,1061,1081]" gridcol="1" gridrow="6" pageId="8" pageNumber="485">41</td>
<td id="55585DE3FFD54191FDF1FBD1FD22FBC1" box="[600,642,1061,1081]" gridcol="2" gridrow="6" pageId="8" pageNumber="485">22</td>
<td id="55585DE3FFD54191FD71FBD1FCA2FBC1" box="[728,770,1061,1081]" gridcol="3" gridrow="6" pageId="8" pageNumber="485">0.53</td>
<td id="55585DE3FFD54191FCE4FBD1FC23FBC1" box="[845,899,1061,1081]" gridcol="4" gridrow="6" pageId="8" pageNumber="485">23.5</td>
<td id="55585DE3FFD54191FC70FBD1FBA3FBC1" box="[985,1027,1061,1081]" gridcol="5" gridrow="6" pageId="8" pageNumber="485">0.57</td>
<td id="55585DE3FFD54191FBFDFBD1FBDEFBC1" box="[1108,1150,1061,1081]" gridcol="6" gridrow="6" pageId="8" pageNumber="485">6.5</td>
<td id="55585DE3FFD54191FB73FBD1FAA4FBC1" box="[1242,1284,1061,1081]" gridcol="7" gridrow="6" pageId="8" pageNumber="485">0.16</td>
<td id="55585DE3FFD54191FAF0FBD1FA26FBC1" box="[1369,1414,1061,1081]" gridcol="8" gridrow="6" pageId="8" pageNumber="485">1.06</td>
</tr>
<tr id="1689349FFFD54191FF2FFBC9FA26FBA9" box="[134,1414,1085,1105]" gridrow="7" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFBC9FDA1FBA9" box="[471,513,1085,1105]" gridcol="1" gridrow="7" pageId="8" pageNumber="485">31</td>
<td id="55585DE3FFD54191FDF1FBC9FD22FBA9" box="[600,642,1085,1105]" gridcol="2" gridrow="7" pageId="8" pageNumber="485">17</td>
<td id="55585DE3FFD54191FD71FBC9FCA2FBA9" box="[728,770,1085,1105]" gridcol="3" gridrow="7" pageId="8" pageNumber="485">0.54</td>
<td id="55585DE3FFD54191FCE4FBC9FC23FBA9" box="[845,899,1085,1105]" gridcol="4" gridrow="7" pageId="8" pageNumber="485">15.5</td>
<td id="55585DE3FFD54191FC70FBC9FBA3FBA9" box="[985,1027,1085,1105]" gridcol="5" gridrow="7" pageId="8" pageNumber="485">0.5</td>
<td id="55585DE3FFD54191FBFDFBC9FBDEFBA9" box="[1108,1150,1085,1105]" gridcol="6" gridrow="7" pageId="8" pageNumber="485">4</td>
<td id="55585DE3FFD54191FB73FBC9FAA4FBA9" box="[1242,1284,1085,1105]" gridcol="7" gridrow="7" pageId="8" pageNumber="485">0.13</td>
<td id="55585DE3FFD54191FAF0FBC9FA26FBA9" box="[1369,1414,1085,1105]" gridcol="8" gridrow="7" pageId="8" pageNumber="485">0.91</td>
</tr>
<tr id="1689349FFFD54191FF2FFB95FA26FB8D" box="[134,1414,1121,1141]" gridrow="8" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFB95FEB7FB8D" box="[134,279,1121,1141]" gridcol="0" gridrow="8" pageId="8" pageNumber="485">2021.BR.N.150</th>
<td id="55585DE3FFD54191FE7EFB95FDA1FB8D" box="[471,513,1121,1141]" gridcol="1" gridrow="8" pageId="8" pageNumber="485">45.5</td>
<td id="55585DE3FFD54191FDF1FB95FD22FB8D" box="[600,642,1121,1141]" gridcol="2" gridrow="8" pageId="8" pageNumber="485">24</td>
<td id="55585DE3FFD54191FD71FB95FCA2FB8D" box="[728,770,1121,1141]" gridcol="3" gridrow="8" pageId="8" pageNumber="485">0.52</td>
<td id="55585DE3FFD54191FCE4FB95FC23FB8D" box="[845,899,1121,1141]" gridcol="4" gridrow="8" pageId="8" pageNumber="485">#24</td>
<td id="55585DE3FFD54191FC70FB95FBA3FB8D" box="[985,1027,1121,1141]" gridcol="5" gridrow="8" pageId="8" pageNumber="485">0.52</td>
<td id="55585DE3FFD54191FBFDFB95FBDEFB8D" box="[1108,1150,1121,1141]" gridcol="6" gridrow="8" pageId="8" pageNumber="485">7.5</td>
<td id="55585DE3FFD54191FB73FB95FAA4FB8D" box="[1242,1284,1121,1141]" gridcol="7" gridrow="8" pageId="8" pageNumber="485">0.16</td>
<td id="55585DE3FFD54191FAF0FB95FA26FB8D" box="[1369,1414,1121,1141]" gridcol="8" gridrow="8" pageId="8" pageNumber="485">1</td>
</tr>
<tr id="1689349FFFD54191FF2FFB8DFA26FB75" box="[134,1414,1145,1165]" gridrow="9" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFB8DFDA1FB75" box="[471,513,1145,1165]" gridcol="1" gridrow="9" pageId="8" pageNumber="485">34.5</td>
<td id="55585DE3FFD54191FDF1FB8DFD22FB75" box="[600,642,1145,1165]" gridcol="2" gridrow="9" pageId="8" pageNumber="485">20</td>
<td id="55585DE3FFD54191FD71FB8DFCA2FB75" box="[728,770,1145,1165]" gridcol="3" gridrow="9" pageId="8" pageNumber="485">0.57</td>
<td id="55585DE3FFD54191FCE4FB8DFC23FB75" box="[845,899,1145,1165]" gridcol="4" gridrow="9" pageId="8" pageNumber="485">#16</td>
<td id="55585DE3FFD54191FC70FB8DFBA3FB75" box="[985,1027,1145,1165]" gridcol="5" gridrow="9" pageId="8" pageNumber="485">0.46</td>
<td id="55585DE3FFD54191FBFDFB8DFBDEFB75" box="[1108,1150,1145,1165]" gridcol="6" gridrow="9" pageId="8" pageNumber="485">3.8</td>
<td id="55585DE3FFD54191FB73FB8DFAA4FB75" box="[1242,1284,1145,1165]" gridcol="7" gridrow="9" pageId="8" pageNumber="485">0.19</td>
<td id="55585DE3FFD54191FAF0FB8DFA26FB75" box="[1369,1414,1145,1165]" gridcol="8" gridrow="9" pageId="8" pageNumber="485">0.8</td>
</tr>
<tr id="1689349FFFD54191FF2FFB68FA26FB48" box="[134,1414,1180,1200]" gridrow="10" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFB68FEB7FB48" box="[134,279,1180,1200]" gridcol="0" gridrow="10" pageId="8" pageNumber="485">2021.BR.N.151</th>
<td id="55585DE3FFD54191FE7EFB68FDA1FB48" box="[471,513,1180,1200]" gridcol="1" gridrow="10" pageId="8" pageNumber="485">40</td>
<td id="55585DE3FFD54191FDF1FB68FD22FB48" box="[600,642,1180,1200]" gridcol="2" gridrow="10" pageId="8" pageNumber="485">22</td>
<td id="55585DE3FFD54191FD71FB68FCA2FB48" box="[728,770,1180,1200]" gridcol="3" gridrow="10" pageId="8" pageNumber="485">0.55</td>
<td id="55585DE3FFD54191FCE4FB68FC23FB48" box="[845,899,1180,1200]" gridcol="4" gridrow="10" pageId="8" pageNumber="485">#10</td>
<td id="55585DE3FFD54191FC70FB68FBA3FB48" box="[985,1027,1180,1200]" gridcol="5" gridrow="10" pageId="8" pageNumber="485">0.25</td>
<td id="55585DE3FFD54191FBFDFB68FBDEFB48" box="[1108,1150,1180,1200]" gridcol="6" gridrow="10" pageId="8" pageNumber="485">6</td>
<td id="55585DE3FFD54191FB73FB68FAA4FB48" box="[1242,1284,1180,1200]" gridcol="7" gridrow="10" pageId="8" pageNumber="485">0.15</td>
<td id="55585DE3FFD54191FAF0FB68FA26FB48" box="[1369,1414,1180,1200]" gridcol="8" gridrow="10" pageId="8" pageNumber="485">0.5?</td>
</tr>
<tr id="1689349FFFD54191FF2FFB40FA26FB30" box="[134,1414,1204,1224]" gridrow="11" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFB40FDA1FB30" box="[471,513,1204,1224]" gridcol="1" gridrow="11" pageId="8" pageNumber="485">18.4</td>
<td id="55585DE3FFD54191FDF1FB40FD22FB30" box="[600,642,1204,1224]" gridcol="2" gridrow="11" pageId="8" pageNumber="485">16</td>
<td id="55585DE3FFD54191FD71FB40FCA2FB30" box="[728,770,1204,1224]" gridcol="3" gridrow="11" pageId="8" pageNumber="485">–</td>
<td id="55585DE3FFD54191FCE4FB40FC23FB30" box="[845,899,1204,1224]" gridcol="4" gridrow="11" pageId="8" pageNumber="485">#14</td>
<td id="55585DE3FFD54191FC70FB40FBA3FB30" box="[985,1027,1204,1224]" gridcol="5" gridrow="11" pageId="8" pageNumber="485">–</td>
<td id="55585DE3FFD54191FBFDFB40FBDEFB30" box="[1108,1150,1204,1224]" gridcol="6" gridrow="11" pageId="8" pageNumber="485">4</td>
<td id="55585DE3FFD54191FB73FB40FAA4FB30" box="[1242,1284,1204,1224]" gridcol="7" gridrow="11" pageId="8" pageNumber="485">0.21</td>
<td id="55585DE3FFD54191FAF0FB40FA26FB30" box="[1369,1414,1204,1224]" gridcol="8" gridrow="11" pageId="8" pageNumber="485">–</td>
</tr>
<tr id="1689349FFFD54191FF2FFB2CFA26FB14" box="[134,1414,1240,1260]" gridrow="12" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFB2CFEB7FB14" box="[134,279,1240,1260]" gridcol="0" gridrow="12" pageId="8" pageNumber="485">2021.BR.N.152</th>
<td id="55585DE3FFD54191FE7EFB2CFDA1FB14" box="[471,513,1240,1260]" gridcol="1" gridrow="12" pageId="8" pageNumber="485">53</td>
<td id="55585DE3FFD54191FDF1FB2CFD22FB14" box="[600,642,1240,1260]" gridcol="2" gridrow="12" pageId="8" pageNumber="485">27</td>
<td id="55585DE3FFD54191FD71FB2CFCA2FB14" box="[728,770,1240,1260]" gridcol="3" gridrow="12" pageId="8" pageNumber="485">0.5</td>
<td id="55585DE3FFD54191FCE4FB2CFC23FB14" box="[845,899,1240,1260]" gridcol="4" gridrow="12" pageId="8" pageNumber="485">25</td>
<td id="55585DE3FFD54191FC70FB2CFBA3FB14" box="[985,1027,1240,1260]" gridcol="5" gridrow="12" pageId="8" pageNumber="485">0.47</td>
<td id="55585DE3FFD54191FBFDFB2CFBDEFB14" box="[1108,1150,1240,1260]" gridcol="6" gridrow="12" pageId="8" pageNumber="485">5</td>
<td id="55585DE3FFD54191FB73FB2CFAA4FB14" box="[1242,1284,1240,1260]" gridcol="7" gridrow="12" pageId="8" pageNumber="485">0.17</td>
<td id="55585DE3FFD54191FAF0FB2CFA26FB14" box="[1369,1414,1240,1260]" gridcol="8" gridrow="12" pageId="8" pageNumber="485">0.92</td>
</tr>
<tr id="1689349FFFD54191FF2FFB04FA26FAFC" box="[134,1414,1264,1284]" gridrow="13" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFB04FDA1FAFC" box="[471,513,1264,1284]" gridcol="1" gridrow="13" pageId="8" pageNumber="485">30</td>
<td id="55585DE3FFD54191FDF1FB04FD22FAFC" box="[600,642,1264,1284]" gridcol="2" gridrow="13" pageId="8" pageNumber="485">16</td>
<td id="55585DE3FFD54191FD71FB04FCA2FAFC" box="[728,770,1264,1284]" gridcol="3" gridrow="13" pageId="8" pageNumber="485">0.53</td>
<td id="55585DE3FFD54191FCE4FB04FC23FAFC" box="[845,899,1264,1284]" gridcol="4" gridrow="13" pageId="8" pageNumber="485">15</td>
<td id="55585DE3FFD54191FC70FB04FBA3FAFC" box="[985,1027,1264,1284]" gridcol="5" gridrow="13" pageId="8" pageNumber="485">0.5</td>
<td id="55585DE3FFD54191FBFDFB04FBDEFAFC" box="[1108,1150,1264,1284]" gridcol="6" gridrow="13" pageId="8" pageNumber="485">3.8</td>
<td id="55585DE3FFD54191FB73FB04FAA4FAFC" box="[1242,1284,1264,1284]" gridcol="7" gridrow="13" pageId="8" pageNumber="485">0.12</td>
<td id="55585DE3FFD54191FAF0FB04FA26FAFC" box="[1369,1414,1264,1284]" gridcol="8" gridrow="13" pageId="8" pageNumber="485">0.93</td>
</tr>
<tr id="1689349FFFD54191FF2FFAFCFA26FAE4" box="[134,1414,1288,1308]" gridrow="14" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFAFCFDA1FAE4" box="[471,513,1288,1308]" gridcol="1" gridrow="14" pageId="8" pageNumber="485">25</td>
<td id="55585DE3FFD54191FDF1FAFCFD22FAE4" box="[600,642,1288,1308]" gridcol="2" gridrow="14" pageId="8" pageNumber="485">14</td>
<td id="55585DE3FFD54191FD71FAFCFCA2FAE4" box="[728,770,1288,1308]" gridcol="3" gridrow="14" pageId="8" pageNumber="485">0.56</td>
<td id="55585DE3FFD54191FCE4FAFCFC23FAE4" box="[845,899,1288,1308]" gridcol="4" gridrow="14" pageId="8" pageNumber="485">12.5</td>
<td id="55585DE3FFD54191FC70FAFCFBA3FAE4" box="[985,1027,1288,1308]" gridcol="5" gridrow="14" pageId="8" pageNumber="485">0.5</td>
<td id="55585DE3FFD54191FBFDFAFCFBDEFAE4" box="[1108,1150,1288,1308]" gridcol="6" gridrow="14" pageId="8" pageNumber="485">3.7</td>
<td id="55585DE3FFD54191FB73FAFCFAA4FAE4" box="[1242,1284,1288,1308]" gridcol="7" gridrow="14" pageId="8" pageNumber="485">0.14</td>
<td id="55585DE3FFD54191FAF0FAFCFA26FAE4" box="[1369,1414,1288,1308]" gridcol="8" gridrow="14" pageId="8" pageNumber="485">0.9</td>
</tr>
<tr id="1689349FFFD54191FF2FFADFFA26FAC7" box="[134,1414,1323,1343]" gridrow="15" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFADFFEB7FAC7" box="[134,279,1323,1343]" gridcol="0" gridrow="15" pageId="8" pageNumber="485">2021.BR.N.153</th>
<td id="55585DE3FFD54191FE7EFADFFDA1FAC7" box="[471,513,1323,1343]" gridcol="1" gridrow="15" pageId="8" pageNumber="485">61</td>
<td id="55585DE3FFD54191FDF1FADFFD22FAC7" box="[600,642,1323,1343]" gridcol="2" gridrow="15" pageId="8" pageNumber="485">33</td>
<td id="55585DE3FFD54191FD71FADFFCA2FAC7" box="[728,770,1323,1343]" gridcol="3" gridrow="15" pageId="8" pageNumber="485">0.54</td>
<td id="55585DE3FFD54191FCE4FADFFC23FAC7" box="[845,899,1323,1343]" gridcol="4" gridrow="15" pageId="8" pageNumber="485">29</td>
<td id="55585DE3FFD54191FC70FADFFBA3FAC7" box="[985,1027,1323,1343]" gridcol="5" gridrow="15" pageId="8" pageNumber="485">0.47</td>
<td id="55585DE3FFD54191FBFDFADFFBDEFAC7" box="[1108,1150,1323,1343]" gridcol="6" gridrow="15" pageId="8" pageNumber="485">?5</td>
<td id="55585DE3FFD54191FB73FADFFAA4FAC7" box="[1242,1284,1323,1343]" gridcol="7" gridrow="15" pageId="8" pageNumber="485">0.08</td>
<td id="55585DE3FFD54191FAF0FADFFA26FAC7" box="[1369,1414,1323,1343]" gridcol="8" gridrow="15" pageId="8" pageNumber="485">0.87</td>
</tr>
<tr id="1689349FFFD54191FF2FFABBFA26FA9B" box="[134,1414,1359,1379]" gridrow="16" pageId="8" pageNumber="485">
<th id="55585DE3FFD54191FF2FFABBFEB7FA9B" box="[134,279,1359,1379]" gridcol="0" gridrow="16" pageId="8" pageNumber="485">2021.BR.N.155</th>
<td id="55585DE3FFD54191FE7EFABBFDA1FA9B" box="[471,513,1359,1379]" gridcol="1" gridrow="16" pageId="8" pageNumber="485">54</td>
<td id="55585DE3FFD54191FDF1FABBFD22FA9B" box="[600,642,1359,1379]" gridcol="2" gridrow="16" pageId="8" pageNumber="485">28</td>
<td id="55585DE3FFD54191FD71FABBFCA2FA9B" box="[728,770,1359,1379]" gridcol="3" gridrow="16" pageId="8" pageNumber="485">0.51</td>
<td id="55585DE3FFD54191FCE4FABBFC23FA9B" box="[845,899,1359,1379]" gridcol="4" gridrow="16" pageId="8" pageNumber="485">27</td>
<td id="55585DE3FFD54191FC70FABBFBA3FA9B" box="[985,1027,1359,1379]" gridcol="5" gridrow="16" pageId="8" pageNumber="485">0.5</td>
<td id="55585DE3FFD54191FBFDFABBFBDEFA9B" box="[1108,1150,1359,1379]" gridcol="6" gridrow="16" pageId="8" pageNumber="485">9</td>
<td id="55585DE3FFD54191FB73FABBFAA4FA9B" box="[1242,1284,1359,1379]" gridcol="7" gridrow="16" pageId="8" pageNumber="485">0.16</td>
<td id="55585DE3FFD54191FAF0FABBFA26FA9B" box="[1369,1414,1359,1379]" gridcol="8" gridrow="16" pageId="8" pageNumber="485">0.96</td>
</tr>
<tr id="1689349FFFD54191FF2FFA93FA26FA83" box="[134,1414,1383,1403]" gridrow="17" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFA93FDA1FA83" box="[471,513,1383,1403]" gridcol="1" gridrow="17" pageId="8" pageNumber="485">42</td>
<td id="55585DE3FFD54191FDF1FA93FD22FA83" box="[600,642,1383,1403]" gridcol="2" gridrow="17" pageId="8" pageNumber="485">23</td>
<td id="55585DE3FFD54191FD71FA93FCA2FA83" box="[728,770,1383,1403]" gridcol="3" gridrow="17" pageId="8" pageNumber="485">0.54</td>
<td id="55585DE3FFD54191FCE4FA93FC23FA83" box="[845,899,1383,1403]" gridcol="4" gridrow="17" pageId="8" pageNumber="485">23</td>
<td id="55585DE3FFD54191FC70FA93FBA3FA83" box="[985,1027,1383,1403]" gridcol="5" gridrow="17" pageId="8" pageNumber="485">0.54</td>
<td id="55585DE3FFD54191FBFDFA93FBDEFA83" box="[1108,1150,1383,1403]" gridcol="6" gridrow="17" pageId="8" pageNumber="485">8</td>
<td id="55585DE3FFD54191FB73FA93FAA4FA83" box="[1242,1284,1383,1403]" gridcol="7" gridrow="17" pageId="8" pageNumber="485">0.19</td>
<td id="55585DE3FFD54191FAF0FA93FA26FA83" box="[1369,1414,1383,1403]" gridcol="8" gridrow="17" pageId="8" pageNumber="485">1</td>
</tr>
<tr id="1689349FFFD54191FF2FFA8BFA26FA6B" box="[134,1414,1407,1427]" gridrow="18" pageId="8" pageNumber="485" rowspan-0="1">
<td id="55585DE3FFD54191FE7EFA8BFDA1FA6B" box="[471,513,1407,1427]" gridcol="1" gridrow="18" pageId="8" pageNumber="485">37</td>
<td id="55585DE3FFD54191FDF1FA8BFD22FA6B" box="[600,642,1407,1427]" gridcol="2" gridrow="18" pageId="8" pageNumber="485">19</td>
<td id="55585DE3FFD54191FD71FA8BFCA2FA6B" box="[728,770,1407,1427]" gridcol="3" gridrow="18" pageId="8" pageNumber="485">0.51</td>
<td id="55585DE3FFD54191FCE4FA8BFC23FA6B" box="[845,899,1407,1427]" gridcol="4" gridrow="18" pageId="8" pageNumber="485">17</td>
<td id="55585DE3FFD54191FC70FA8BFBA3FA6B" box="[985,1027,1407,1427]" gridcol="5" gridrow="18" pageId="8" pageNumber="485">0.45</td>
<td id="55585DE3FFD54191FBFDFA8BFBDEFA6B" box="[1108,1150,1407,1427]" gridcol="6" gridrow="18" pageId="8" pageNumber="485">6</td>
<td id="55585DE3FFD54191FB73FA8BFAA4FA6B" box="[1242,1284,1407,1427]" gridcol="7" gridrow="18" pageId="8" pageNumber="485">0.16</td>
<td id="55585DE3FFD54191FAF0FA8BFA26FA6B" box="[1369,1414,1407,1427]" gridcol="8" gridrow="18" pageId="8" pageNumber="485">0.89</td>
</tr>
</table>
</paragraph>
<paragraph id="A80636DDFFD5BE66FF2DF8C6FEB8F8B4" blockId="8.[132,280,1842,1868]" box="[132,280,1842,1868]" pageId="8" pageNumber="485">DWARFISM</paragraph>
<paragraph id="A80636DDFFD5BE66FF2DF886FA95F895" blockId="8.[132,775,1906,2028]" lastBlockId="8.[811,1458,1491,2028]" pageId="8" pageNumber="485">
Dwarfism has been described from several Jurassic nautilids including 
<taxonomicName id="6FB94D5EFFD5BE66FF5CF867FD33F854" authority="Tintant, 1984" authorityName="Tintant" authorityYear="1984" box="[245,659,1938,1964]" class="Cephalopoda" family="Paracenoceratidae" genus="Paracenoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="parvulum">
<emphasis id="9ACDEACFFFD5BE66FF5CF867FE51F854" box="[245,497,1938,1964]" italics="true" pageId="8" pageNumber="485">Paracenoceras parvulum</emphasis>
Tintant, 1984
</taxonomicName>
and 
<taxonomicName id="6FB94D5EFFD5BE66FD79F867FF75F814" authority="(Parona &amp; Bonarelli, 1895) (Tintant 1984 b)" authorityName="Tintant" authorityYear="1984" baseAuthorityName="Parona &amp; Bonarelli" baseAuthorityYear="1895" class="Cephalopoda" family="Paracenoceratidae" genus="Paracenoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="dorsoexcavatum">
<emphasis id="9ACDEACFFFD5BE66FD79F867FE24F834" italics="true" pageId="8" pageNumber="485">Paracenoceras dorsoexcavatum</emphasis>
(Parona &amp; Bonarelli, 1895) (
<bibRefCitation id="CC284B2CFFD5BE66FD1FF846FF6AF813" author="TINTANT H." pageId="8" pageNumber="485" pagination="403 - 410" refId="ref6352" refString="TINTANT H. 1984 b. - Exemples de nanisme specifique chez les Nautiloides du genre Paracenoceras au Jurassique moyen. Geobios 17 (Supplement 1): 403 - 410, 3 figs, 1 pl. https: // doi. org / 10.1016 / S 0016 - 6995 (84) 80197 - 7" type="journal article" year="1984">Tintant 1984b</bibRefCitation>
)
</taxonomicName>
. The description of the smallest taxon (
<taxonomicName id="6FB94D5EFFD5BE66FDD6F826FD5EF813" authorityName="Tintant" authorityYear="1984" box="[639,766,2001,2027]" class="Cephalopoda" family="Paracenoceratidae" genus="Paracenoceras" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="parvulum">
<emphasis id="9ACDEACFFFD5BE66FDD6F826FD5EF813" box="[639,766,2001,2027]" italics="true" pageId="8" pageNumber="485">P. parvulum</emphasis>
</taxonomicName>
) was based on one complete specimen and two body chambers. According to Tintant, this species was adult with a shell diameter of about 
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. According to the plates presented in Tintant’s paper, the approximation of the two last septa does not clearly appear. 
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<emphasis id="9ACDEACFFFD5BE66FBEDF9A0FAE9F995" box="[1092,1353,1619,1645]" italics="true" pageId="8" pageNumber="485">Paracenoceras parvulum</emphasis>
</taxonomicName>
has only previously been recorded from 
<collectingRegion id="6A7DF83FFFD5BE66FBD5F987FB48F975" box="[1148,1256,1651,1677]" country="France" name="Bourgogne" pageId="8" pageNumber="485">Burgundy</collectingRegion>
but is now known to occur at the same stratigraphic level (upper Callovian) in Western 
<collectingCountry id="D0AE764DFFD5BE66FC21F947FC6EF935" box="[904,974,1715,1741]" name="France" pageId="8" pageNumber="485">France</collectingCountry>
(personal data of the author). These small sized specimens are a little larger than those described by Tintant; one example in the author’s collection shows feature of an adult specimen at a diameter of 
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. Another interesting dwarf species is ‘ 
<emphasis id="9ACDEACFFFD5BE66FC4DF8C6FB3CF8B4" box="[996,1180,1842,1868]" italics="true" pageId="8" pageNumber="485">Cenoceras’ fuscum</emphasis>
figured in 
<bibRefCitation id="CC284B2CFFD5BE66FAB3F8C6FA09F8B4" author="CHIRAT R." box="[1306,1449,1842,1868]" pageId="8" pageNumber="485" refId="ref5590" refString="CHIRAT R. 1997. - Les Nautilida post-triasiques. Paleobiologie, paleoecologie, paleobiogeographie et systematique a la lumiere des donnees recemment acquises sur Nautilus. MC thesis, Universite de Caen Normandie, Caen, 322 p." type="book" year="1997">Chirat (1997</bibRefCitation>
: pl. 5, fig. 5a-c), whose adult diameter is 
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.
</paragraph>
<paragraph id="A80636DDFFD5BE67FCEAF886FD81FA35" blockId="8.[811,1458,1491,2028]" lastBlockId="9.[130,777,1172,1773]" lastPageId="9" lastPageNumber="486" pageId="8" pageNumber="485">
Nevertheless, all these nautilids are larger at adult size than 
<taxonomicName id="6FB94D5EFFD5BE66FC82F866FBB8F854" authorityName="Branger" authorityYear="2023" box="[811,1048,1938,1964]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="8" pageNumber="485" phylum="Mollusca" rank="species" species="evolutus" status="n. gen., n. sp.">
<emphasis id="9ACDEACFFFD5BE66FC82F866FBB8F854" box="[811,1048,1938,1964]" italics="true" pageId="8" pageNumber="485">Micronautilus evolutus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD5BE66FB89F866FB12F854" box="[1056,1202,1938,1964]" pageId="8" pageNumber="485" rank="species">n. gen., n. sp.</taxonomicNameLabel>
The origin of this unusual dwarfism among nautilids has already been discussed by 
<bibRefCitation id="CC284B2CFFD5BE66FC82F825FC7BF814" author="TINTANT H." box="[811,987,2001,2028]" pageId="8" pageNumber="485" pagination="403 - 410" refId="ref6352" refString="TINTANT H. 1984 b. - Exemples de nanisme specifique chez les Nautiloides du genre Paracenoceras au Jurassique moyen. Geobios 17 (Supplement 1): 403 - 410, 3 figs, 1 pl. https: // doi. org / 10.1016 / S 0016 - 6995 (84) 80197 - 7" type="journal article" year="1984">Tintant (1984b)</bibRefCitation>
. At the same stratigraphic levels, larger shells, up to diameter of 
<quantity id="6F419B38FFD4BE67FEE7FB61FE10FB57" box="[334,432,1173,1199]" metricMagnitude="-1" metricUnit="m" metricValue="3.0" pageId="9" pageNumber="486" unit="mm" value="300.0">300 mm</quantity>
, are mixed with small to dwarf individuals. This is also true for the accompanying ammonite fauna and the benthic elements, bivalves and gastropods, that shows a mixing of larger and smaller individuals. As the limestone layers where the nautilids are preserved have been deposited within an open shelf environment, those populations were not isolated. Consequently, it seems impossible to explain this case of dwarfism as a result of an highly stressed environment, it has to be considered as a specific feature due to the evolution of an original lineage.
</paragraph>
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<paragraph id="A80636DDFFD4BE67FF2DFBB3FEE2FB97" blockId="9.[132,1455,1095,1135]" pageId="9" pageNumber="486">
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. 7. — Origin and evolution of 
<taxonomicName id="6FB94D5EFFD4BE67FE37FBB3FDADFBA0" authorityName="Branger" authorityYear="2023" box="[414,525,1095,1112]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus" status="gen. nov.">
<emphasis id="9ACDEACFFFD4BE67FE37FBB3FDADFBA0" box="[414,525,1095,1112]" italics="true" pageId="9" pageNumber="486">Micronautilus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD4BE67FDBDFBB3FDF0FBA0" box="[532,592,1095,1112]" pageId="9" pageNumber="486" rank="genus">n. gen.</taxonomicNameLabel>
and 
<taxonomicName id="6FB94D5EFFD4BE67FDD2FBB3FCCDFBA0" authority="(Branger, 2004)" baseAuthorityName="Branger" baseAuthorityYear="2004" box="[635,877,1095,1112]" class="Cephalopoda" family="Cenoceratidae" genus="Pictonautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus">
<emphasis id="9ACDEACFFFD4BE67FDD2FBB3FD46FBA0" box="[635,742,1095,1112]" italics="true" pageId="9" pageNumber="486">Pictonautilus</emphasis>
(
<bibRefCitation id="CC284B2CFFD4BE67FD59FBB3FCC9FBA0" author="BRANGER P." box="[752,873,1095,1112]" pageId="9" pageNumber="486" pagination="142 - 149" refId="ref5498" refString="BRANGER P. 2004. - Middle Jurassic Nautiloidea from Western France. Rivista Italiana di Paleontologia e Stratigraphia (Special issue the 6 th Int. Symposium on the Jurassic System, 16 - 19 September 2002) 110 (1): 142 - 149, 3 pl." type="journal article" year="2004">Branger, 2004</bibRefCitation>
)
</taxonomicName>
are likely to occur from the 
<emphasis id="9ACDEACFFFD4BE67FBF6FBB3FAA6FBA0" box="[1119,1286,1095,1112]" italics="true" pageId="9" pageNumber="486">‘Cenoceras’ fuscum</emphasis>
(
<bibRefCitation id="CC284B2CFFD4BE67FABBFBB3FAD3FBA0" author="CRICK G. C." box="[1298,1395,1095,1112]" pageId="9" pageNumber="486" pagination="117 - 139" refId="ref5695" refString="CRICK G. C. 1898. - Descriptions of new or imperfectly known species of Nautilus from the Inferior Oolite, preserved in the British Museum (Natural History). Proceedings of the Malacological Society of London 3: 117 - 139, figs I-XV." type="journal article" year="1898">Crick, 1898</bibRefCitation>
) group at the end of Bajocian.
</paragraph>
</caption>
<paragraph id="A80636DDFFD4BE67FF32FA27FD0FF914" blockId="9.[130,777,1172,1773]" pageId="9" pageNumber="486">
Another explanation which could be evoked would be a possible sexual dimorphism. This phenomenon has been proved by many authors in modern 
<taxonomicName id="6FB94D5EFFD4BE67FE1AF9E7FDADF9D5" authorityName="Linnaeus" authorityYear="1758" box="[435,525,1555,1581]" class="Cephalopoda" family="Nautilidae" genus="Nautilus" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus">
<emphasis id="9ACDEACFFFD4BE67FE1AF9E7FDADF9D5" box="[435,525,1555,1581]" italics="true" pageId="9" pageNumber="486">Nautilus</emphasis>
</taxonomicName>
. 
<bibRefCitation id="CC284B2CFFD4BE67FDB2F9E7FD12F9D5" author="WILLEY A." box="[539,690,1555,1581]" pageId="9" pageNumber="486" pagination="691 - 830" refId="ref6439" refString="WILLEY A. 1902. - Contributions to the natural history of the pearly Nautilus: Zoological results based on material from New Britain, New Guinea, Loyalty Islands and elsewhere, collected during the years 1895, 1896 and 1897. Part 6. Cambridge University Press, Cambridge: 691 - 830. https: // doi. org / 10.5962 / bhl. title. 46216" type="book chapter" year="1902">Willey (1902)</bibRefCitation>
was the first biologist who noticed that males are larger and have a broader aperture than females.More recent studies (
<bibRefCitation id="CC284B2CFFD4BE67FD26F9A7FEB5F975" author="SAUNDERS W. B. &amp; SPINOSA C." pageId="9" pageNumber="486" pagination="349 - 358" refId="ref6088" refString="SAUNDERS W. B. &amp; SPINOSA C. 1978. - Sexual dimorphism in Nautilus from Palau. Paleobiology 4 (3): 349 - 358. https: // doi. org / 10.1017 / S 0094837300006047" type="journal article" year="1978">Saunders &amp; Spinosa 1978</bibRefCitation>
; 
<bibRefCitation id="CC284B2CFFD4BE67FE8BF987FE58F975" author="SAUNDERS W. B. &amp; MAPES R. H. &amp; WHITE M. M. &amp; HASTIE S. T. &amp; YAQIN K." box="[290,504,1651,1677]" pageId="9" pageNumber="486" pagination="1 - 14" refId="ref6128" refString="SAUNDERS W. B., MAPES R. H., WHITE M. M., HASTIE S. T. &amp; YAQIN K. 2017. - Descriptions of Nautilus pompilius Linnaeus, 1758 from the Type Area, Ambon, Molucca Islands, and from Sumbawa - Lombok Islands, Indonesia. American Malacological Bulletin 35 (1): 1 - 14. https: // doi. org / 10.4003 / 006.035.0102" type="journal article" year="2017">
Saunders 
<emphasis id="9ACDEACFFFD4BE67FE20F980FE1BF975" box="[393,443,1651,1677]" italics="true" pageId="9" pageNumber="486">et al.</emphasis>
2017
</bibRefCitation>
) lead to the same conclusions. In comparison, the differences between 
<taxonomicName id="6FB94D5EFFD4BE67FDDDF967FCA6F955" authorityName="Branger" authorityYear="2023" box="[628,774,1683,1709]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus" status="gen. nov.">
<emphasis id="9ACDEACFFFD4BE67FDDDF967FCA6F955" box="[628,774,1683,1709]" italics="true" pageId="9" pageNumber="486">Micronautilus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD4BE67FF2DF947FF6FF935" box="[132,207,1715,1741]" pageId="9" pageNumber="486" rank="genus">n. gen.</taxonomicNameLabel>
and other Bathonian nautiluses are disproportionate and cannot be the result of any sexual dimorphism.
</paragraph>
<paragraph id="A80636DDFFD4BE67FF2DF8C6FE41F8B4" blockId="9.[132,481,1842,1868]" box="[132,481,1842,1868]" pageId="9" pageNumber="486">ORIGIN AND EVOLUTION</paragraph>
<paragraph id="A80636DDFFD4BE67FF2DF886FB47FA35" blockId="9.[132,775,1906,2028]" lastBlockId="9.[811,1457,1172,1486]" pageId="9" pageNumber="486">
As discussed above, dwarf nautiluses were already present during Bajocian times (
<bibRefCitation id="CC284B2CFFD4BE67FE2DF866FDAAF854" author="CHIRAT R." box="[388,522,1938,1964]" pageId="9" pageNumber="486" refId="ref5590" refString="CHIRAT R. 1997. - Les Nautilida post-triasiques. Paleobiologie, paleoecologie, paleobiogeographie et systematique a la lumiere des donnees recemment acquises sur Nautilus. MC thesis, Universite de Caen Normandie, Caen, 322 p." type="book" year="1997">Chirat 1997</bibRefCitation>
). 
<taxonomicName id="6FB94D5EFFD4BE67FD8BF866FD14F854" authorityName="Branger" authorityYear="2023" box="[546,692,1938,1964]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus" status="gen. nov.">
<emphasis id="9ACDEACFFFD4BE67FD8BF866FD14F854" box="[546,692,1938,1964]" italics="true" pageId="9" pageNumber="486">Micronautilus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD4BE67FD15F866FCA7F854" box="[700,775,1938,1964]" pageId="9" pageNumber="486" rank="genus">n. gen.</taxonomicNameLabel>
could have evolved from these forms through species like ‘ 
<emphasis id="9ACDEACFFFD4BE67FF22F826FEE8F814" box="[139,328,2002,2028]" italics="true" pageId="9" pageNumber="486">Cenoceras’ fuscum</emphasis>
. All these shells show similarities: small and compressed whorl section, subrectangular section whose venter is boarded by angular wedges. One lineage (
<figureCitation id="30822A58FFD4BE67FACFFB40FA06FB37" box="[1382,1446,1204,1231]" captionStart="FIG" captionStartId="9.[132,143,1095,1112]" captionTargetBox="[408,1160,205,1064]" captionTargetId="graphics-461@9.[428,1160,214,1053]" captionText="FIG. 7. — Origin and evolution of Micronautilus n. gen. and Pictonautilus (Branger, 2004) are likely to occur from the ‘Cenoceras’ fuscum (Crick, 1898) group at the end of Bajocian." pageId="9" pageNumber="486">Fig. 7</figureCitation>
) would be constituted by the following species: ‘ 
<emphasis id="9ACDEACFFFD4BE67FAECFB21FCD4FAF6" italics="true" pageId="9" pageNumber="486">Cenoceras’ fuscum</emphasis>
, upper Bajocian, 
<taxonomicName id="6FB94D5EFFD4BE67FB82FB00FACAFAF6" authority="(Tintant)" baseAuthorityName="Tintant" baseAuthorityYear="1994" box="[1067,1386,1268,1294]" class="Cephalopoda" family="Cenoceratidae" genus="Pictonautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="species" species="clavifer">
<emphasis id="9ACDEACFFFD4BE67FB82FB00FAA0FAF6" box="[1067,1280,1268,1294]" italics="true" pageId="9" pageNumber="486">Pictonautilus clavifer</emphasis>
(Tintant)
</taxonomicName>
, lower Bathonian, 
<taxonomicName id="6FB94D5EFFD4BE67FC02FAE0FA89FAD6" authority="(Lissajous)" baseAuthorityName="Lissajous" baseAuthorityYear="1923" box="[939,1321,1300,1326]" class="Cephalopoda" family="Cenoceratidae" genus="Pictonautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="species" species="verciacensis">
<emphasis id="9ACDEACFFFD4BE67FC02FAE0FB0EFAD6" box="[939,1198,1300,1326]" italics="true" pageId="9" pageNumber="486">Pictonautilus verciacensis</emphasis>
(Lissajous)
</taxonomicName>
, middle and upper Bathonian, and 
<taxonomicName id="6FB94D5EFFD4BE67FBB7FAC0FB69FAB6" box="[1054,1225,1332,1358]" class="Cephalopoda" family="Cenoceratidae" genus="Pictonautilus" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="species" species="undetermined">
<emphasis id="9ACDEACFFFD4BE67FBB7FAC0FB06FAB6" box="[1054,1190,1332,1358]" italics="true" pageId="9" pageNumber="486">Pictonautilus</emphasis>
sp.
</taxonomicName>
(lower Callovian). In the proposed phylogeny, 
<taxonomicName id="6FB94D5EFFD4BE67FBEFFAA0FB7AFA96" authorityName="Branger" authorityYear="2023" box="[1094,1242,1364,1390]" class="Cephalopoda" family="Paracenoceratidae" genus="Micronautilus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Nautilida" pageId="9" pageNumber="486" phylum="Mollusca" rank="genus" status="gen. nov.">
<emphasis id="9ACDEACFFFD4BE67FBEFFAA0FB7AFA96" box="[1094,1242,1364,1390]" italics="true" pageId="9" pageNumber="486">Micronautilus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="81FE57B4FFD4BE67FB4BFAA0FA8FFA96" box="[1250,1327,1364,1390]" pageId="9" pageNumber="486" rank="genus">n. gen.</taxonomicNameLabel>
could have evolved from ‘ 
<emphasis id="9ACDEACFFFD4BE67FC61FA80FBDEFA76" box="[968,1150,1396,1422]" italics="true" pageId="9" pageNumber="486">Cenoceras’ fuscum</emphasis>
at the very end of the Bajocian and would have disappeared before the beginning of the Callovian stage without any descendants.
</paragraph>
</subSubSection>
</treatment>
</document>