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<document id="145962F3E525A3B92A0C38148F940590" ID-ISSN="0253-6730" IM.materialsCitations_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1649690268132" checkinUser="carolina" docAuthor="Sassaroli, Stefano &amp; Venturi, Federico" docDate="2012" docId="03DA011AFFC4FFFE086BFCA6FB150F55" docLanguage="en" docName="RevPaleobiol.31.1.85-114.pdf" docOrigin="Revue de Paléobiologie 31 (1)" docStyle="DocumentStyle:C172DF54475A4E3C75B7590733AD2922.3:RevPaleobiol.2012-.journal_article.1cover" docStyleId="C172DF54475A4E3C75B7590733AD2922" docStyleName="RevPaleobiol.2012-.journal_article.1cover" docStyleVersion="3" docTitle="Hildaites bisulcatus Sassaroli &amp; Venturi 2012, n. sp." docType="treatment" docVersion="2" lastPageNumber="101" masterDocId="FFE37962FFD5FFEF0953FF85FFA50C7C" masterDocTitle="Early Toarcian (post-OAE) Hildoceratinae (Ammonitina) fauna from the Marchean Apennines (Italy)" masterLastPageNumber="114" masterPageNumber="85" pageNumber="101" updateTime="1699312896216" updateUser="plazi" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0">
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<mods:title id="AF3890EC3D76874FD0CA81005989BF7E">Early Toarcian (post-OAE) Hildoceratinae (Ammonitina) fauna from the Marchean Apennines (Italy)</mods:title>
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<mods:name id="D13DE54E579524A161A0AF277E76A894" type="personal">
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<mods:namePart id="FAB8DAA58AFA83093A5732B8FE0DFF22">Sassaroli, Stefano</mods:namePart>
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<mods:namePart id="7875E7B34B7E70F107B3D94EEF3BB70F">Venturi, Federico</mods:namePart>
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<mods:title id="03D91B635C85520F95A1D2A3CA91C571">Revue de Paléobiologie</mods:title>
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<mods:part id="877991E44E4A5DB77EF5C0AC0D0D4F92">
<mods:date id="9C806E779795235ABADDAC2E71AAAF6A">2012</mods:date>
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<mods:number id="B40906CDD8823A12345106C1B91CF521">2012-07-31</mods:number>
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<mods:detail id="DA2FD206117226F759C1E07EBC31CCE1" type="volume">
<mods:number id="C71A95B40642E5323B7C8A0123F9A169">31</mods:number>
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<treatment id="03DA011AFFC4FFFE086BFCA6FB150F55" LSID="urn:lsid:plazi:treatment:03DA011AFFC4FFFE086BFCA6FB150F55" httpUri="http://treatment.plazi.org/id/03DA011AFFC4FFFE086BFCA6FB150F55" lastPageNumber="101" pageId="17" pageNumber="101">
<subSubSection id="C369E387FFC4FFFE086BFCA6FD640F27" pageId="17" pageNumber="101" type="nomenclature">
<paragraph id="8BCCB00CFFC4FFFE086BFCA6FDF60F40" blockId="17.[202,705,803,892]" box="[312,595,803,828]" pageId="17" pageNumber="101">
<heading id="D0840760FFC4FFFE086BFCA6FDF60F40" box="[312,595,803,828]" centered="true" fontSize="9" level="2" pageId="17" pageNumber="101" reason="4">
<emphasis id="B9076C1EFFC4FFFE086BFCA6FDF60F40" bold="true" box="[312,595,803,828]" pageId="17" pageNumber="101">
<taxonomicName id="4C73CB8FFFC4FFFE086BFCA6FDB40F47" ID-CoL="3LWVP" authority="Sassaroli &amp; Venturi, 2012" authorityName="Sassaroli &amp; Venturi" authorityYear="2012" box="[312,529,803,827]" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="bisulcatus" status="sp. nov.">
<emphasis id="B9076C1EFFC4FFFE086BFCA6FDB40F47" bold="true" box="[312,529,803,827]" italics="true" pageId="17" pageNumber="101">Hildaites bisulcatus</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A234D165FFC4FFFE0B44FCA1FDF60F40" box="[535,595,804,828]" pageId="17" pageNumber="101" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="8BCCB00CFFC4FFFE0999FCC1FD640F27" blockId="17.[202,705,803,892]" box="[202,705,835,860]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE0999FCC1FD640F27" bold="true" box="[202,705,835,860]" pageId="17" pageNumber="101">Pl. III, figs. 7, 8, 9a-b, 10a-c; Pl. IV, figs. 1, 2;</emphasis>
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE08DBFCE6FDC60FC4" pageId="17" pageNumber="101" type="description">
<paragraph id="8BCCB00CFFC4FFFE08DBFCE6FDA60F00" blockId="17.[202,705,803,892]" box="[392,515,867,892]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE08DBFCE6FDA60F00" bold="true" box="[392,515,867,892]" pageId="17" pageNumber="101">
<figureCitation id="1348AC89FFC4FFFE08DBFCE6FE6D0F00" box="[392,456,867,892]" captionStart="Fig" captionStartId="16.[151,186,1282,1304]" captionTargetBox="[149,1433,259,1260]" captionTargetId="figure-361@16.[148,1433,259,1265]" captionTargetPageId="16" captionText="Fig. 7: A-C: Hildaites planiventris n. sp., holotype MSA61, shell draw (x1), whorl section (x1) and suture (x3). D-E: Hildaites bisulcatus n. sp., holotype MSA351, whorl section (x1) and suture (x3). F-G: Hildaites calamantis n. sp., holotype MSA85, whorl section (x1) and suture (x2)." pageId="17" pageNumber="101">Fig. 7</figureCitation>
, D-E
</emphasis>
</paragraph>
<paragraph id="8BCCB00CFFC4FFFE09C4FC26FDC60FC4" blockId="17.[151,611,931,953]" box="[151,611,931,953]" pageId="17" pageNumber="101">
2010.
<taxonomicName id="4C73CB8FFFC4FFFE0989FC26FE970FC4" authority="Sassaroli &amp; Venturi, 2012" authorityName="Sassaroli &amp; Venturi" authorityYear="2012" box="[218,306,931,952]" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="genus" status="sp. nov.">
<emphasis id="B9076C1EFFC4FFFE0989FC26FE970FC4" box="[218,306,931,952]" italics="true" pageId="17" pageNumber="101">Hildaites</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A234D165FFC4FFFE086BFC26FEC90FC4" box="[312,364,931,952]" pageId="17" pageNumber="101" rank="species">n. sp.</taxonomicNameLabel>
- BILOTTA
<emphasis id="B9076C1EFFC4FFFE088AFC26FDAF0FC4" box="[473,522,931,952]" italics="true" pageId="17" pageNumber="101">et al.</emphasis>
, fig. 17C
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4FC64FDF70866" pageId="17" pageNumber="101" type="materials_examined">
<paragraph id="8BCCB00CFFC4FFFE09C4FC64FDF70866" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4FC64FEA10F85" bold="true" box="[151,260,993,1017]" pageId="17" pageNumber="101">Material:</emphasis>
Fourteen specimens of small and medium size, all coming from Marconessa quarry.
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4FBA4FEA40826" pageId="17" pageNumber="101" type="etymology">
<paragraph id="8BCCB00CFFC4FFFE09C4FBA4FEA40826" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4FBA4FEC80845" bold="true" box="[151,365,1057,1081]" pageId="17" pageNumber="101">Derivatio nominis:</emphasis>
From the bisulcate venter shown in all stages.
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4FBE7FDF10886" pageId="17" pageNumber="101" type="materials_examined">
<paragraph id="8BCCB00CFFC4FFFE09C4FBE7FDEB08C6" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<materialsCitation id="3B1BBA51FFC4FFFE09C4FBE7FDEB08C6" collectionCode="III" pageId="17" pageNumber="101" specimenCode="MSA351" specimenCount="1" typeStatus="holotype">
<emphasis id="B9076C1EFFC4FFFE09C4FBE7FEAD0806" bold="true" box="[151,264,1122,1146]" pageId="17" pageNumber="101">
<typeStatus id="54C80EAEFFC4FFFE09C4FBE7FEA60806" box="[151,259,1122,1146]" pageId="17" pageNumber="101" type="holotype">Holotype</typeStatus>
:
</emphasis>
A medium size and wholly septate specimen
<specimenCode id="DBD51877FFC4FFFE09C4FB04FF5E08E5" box="[151,251,1153,1177]" collectionCode="MSA" country="Ireland" httpUri="http://grbio.org/cool/vvha-6rck" name="Museum of Science and Art" pageId="17" pageNumber="101">MSA351</specimenCode>
, coming from Marconessa quarry, section 2, bed 3a (Pl.
<collectionCode id="ED6228C9FFC4FFFE0842FB27FE8B08C5" box="[273,302,1186,1209]" pageId="17" pageNumber="101">III</collectionCode>
, figs. 10a-b-c;
<figureCitation id="1348AC89FFC4FFFE089FFB27FDA308C6" box="[460,518,1186,1210]" captionStart="Fig" captionStartId="16.[151,186,1282,1304]" captionTargetBox="[149,1433,259,1260]" captionTargetId="figure-361@16.[148,1433,259,1265]" captionTargetPageId="16" captionText="Fig. 7: A-C: Hildaites planiventris n. sp., holotype MSA61, shell draw (x1), whorl section (x1) and suture (x3). D-E: Hildaites bisulcatus n. sp., holotype MSA351, whorl section (x1) and suture (x3). F-G: Hildaites calamantis n. sp., holotype MSA85, whorl section (x1) and suture (x2)." pageId="17" pageNumber="101">Fig.7</figureCitation>
, D-E).
</materialsCitation>
</paragraph>
<paragraph id="8BCCB00CFFC4FFFE09C4FB47FDF10886" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4FB47FEEA08A6" bold="true" box="[151,335,1218,1242]" pageId="17" pageNumber="101">Stratus typicus:</emphasis>
Nodular limestone and grey marls of the early Toarcian (Bugarone Formation).
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4FA87FE2B0A67" pageId="17" pageNumber="101" type="diagnosis">
<paragraph id="8BCCB00CFFC4FFFE09C4FA87FE2B0A67" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4FA87FEAB0966" bold="true" box="[151,270,1282,1306]" pageId="17" pageNumber="101">Diagnosis:</emphasis>
Moderately evolute compressed shell showing a little overlap of the whorls, from fastigate to sub-trapezoidal whorl section by flattened or little convex sides, wide and bisulcate venter with gentle keel. The shell shows a fast-growth coiling, mainly in the outer whorls. High and sloped umbilical wall and rounded umbilical edge. Falcoid, sparse and single ribs, strongly projected on the ventro-lateral edge. The moderately frilled suture is simple.
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4F9A6FE9B0A00" pageId="17" pageNumber="101" type="materials_examined">
<paragraph id="8BCCB00CFFC4FFFE09C4F9A6FE9B0A00" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4F9A6FE090A47" bold="true" box="[151,428,1571,1595]" pageId="17" pageNumber="101">
<typeStatus id="54C80EAEFFC4FFFE09C4F9A6FF5A0A47" box="[151,255,1571,1595]" pageId="17" pageNumber="101" type="holotype">Holotype</typeStatus>
measurements
</emphasis>
. D:
<quantity id="4C8B1DE9FFC4FFFE08B3F9A6FDE40A47" box="[480,577,1571,1595]" metricMagnitude="-2" metricUnit="m" metricValue="7.45" pageId="17" pageNumber="101" unit="mm" value="74.5">74,5 mm</quantity>
- U:
<quantity id="4C8B1DE9FFC4FFFE0BD3F9A6FD440A47" box="[640,737,1571,1595]" metricMagnitude="-2" metricUnit="m" metricValue="3.35" pageId="17" pageNumber="101" unit="mm" value="33.5">33,5 mm</quantity>
- U/D: 0.45 - Wb:
<quantity id="4C8B1DE9FFC4FFFE0804F9C1FE390A27" box="[343,412,1604,1628]" metricMagnitude="-1" metricUnit="m" metricValue="1.8" pageId="17" pageNumber="101" unit="cm" value="18.0">18 cm</quantity>
- Wh:
<quantity id="4C8B1DE9FFC4FFFE08BDF9C1FD9E0A27" box="[494,571,1604,1628]" metricMagnitude="-2" metricUnit="m" metricValue="2.3" pageId="17" pageNumber="101" unit="mm" value="23.0">23 mm</quantity>
- Wh/ Wb: 1.27 - Wb/Wh: 0.78.
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE09C4F901FC310D01" pageId="17" pageNumber="101" type="description">
<paragraph id="8BCCB00CFFC4FFFE09C4F901FF4C0BA1" blockId="17.[151,757,993,2078]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4F901FE810AE0" bold="true" box="[151,292,1668,1692]" pageId="17" pageNumber="101">Description:</emphasis>
Moderately evolute shell by little convex sides and a sub-trapezoidal whorl section. The bisulcate venter is wide, showing narrow and little deep sulci and a gentle keel. The sloped umbilical wall is high and the umbilical edge is rounded. The falcoid ribs are sparse (moderately rib-density, we counted 46 ribs in the last whorl of the phragmocone), ever single, little coarse and strongly projected on the ventro-lateral edge. The ammonitic suture is slightly jagged, with the E lobe shorter than L lobe, which is wide and little developed in high.
</paragraph>
<paragraph id="8BCCB00CFFC4FFFE09C4F860FC310D01" blockId="17.[151,757,993,2078]" lastBlockId="17.[831,1437,258,809]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE09C4F860FEB70B81" bold="true" box="[151,274,2021,2045]" pageId="17" pageNumber="101">
<typeStatus id="54C80EAEFFC4FFFE09C4F860FEA80B81" box="[151,269,2021,2045]" pageId="17" pageNumber="101" type="paratype">Paratypes</typeStatus>
:
</emphasis>
The
<typeStatus id="54C80EAEFFC4FFFE0833F863FE630B82" box="[352,454,2022,2046]" pageId="17" pageNumber="101" type="paratype">paratypes</typeStatus>
features coincide almost perfectly to the holotypes description. They vary chiefly in having a more or less rib projection on the ventrolateral edge. All samples in all growth stages show a bisulcate venter, which is the typical character of the species.
</paragraph>
</subSubSection>
<subSubSection id="C369E387FFC4FFFE0A13FE03FB150F55" pageId="17" pageNumber="101" type="discussion">
<paragraph id="8BCCB00CFFC4FFFE0A13FE03FC670F74" blockId="17.[831,1437,258,809]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE0A13FE03FAA40DE1" bold="true" box="[832,1281,389,414]" pageId="17" pageNumber="101">Remarks and comparative diagnosis:</emphasis>
This species clearly differs from BUCKMAN s
<typeStatus id="54C80EAEFFC4FFFE0DE3FE23FAA80DC2" box="[1200,1293,422,446]" pageId="17" pageNumber="101" type="holotype">holotype</typeStatus>
of
<taxonomicName id="4C73CB8FFFC4FFFE0C69FE23FC7A0DA3" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="subserpentinus">
<emphasis id="B9076C1EFFC4FFFE0C69FE23FC7A0DA3" italics="true" pageId="17" pageNumber="101">Hildaites subserpentinus</emphasis>
</taxonomicName>
for whorl section, rib-sculpture and ribdensity. At a glance it has a resemblance with some specimens figured by HOWARTH (1992) as
<taxonomicName id="4C73CB8FFFC4FFFE0C69FD8CFC7A0E3E" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="subserpentinus">
<emphasis id="B9076C1EFFC4FFFE0C69FD8CFC7A0E3E" italics="true" pageId="17" pageNumber="101">Hildaites subserpentinus</emphasis>
</taxonomicName>
(pl. 32, figs. 5a-5b; pl. 33, figs. 4a-4b and Pl. 34, figs. 1a-1b), mainly for the ornament. Nevertheless,
<taxonomicName id="4C73CB8FFFC4FFFE0A6CFDE8FC6B0EF8" authorityName="Sassaroli &amp; Venturi" authorityYear="2012" box="[831,974,620,644]" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="bisulcatus">
<emphasis id="B9076C1EFFC4FFFE0A6CFDE8FC6B0EF8" box="[831,974,620,644]" italics="true" pageId="17" pageNumber="101">H. bisulcatus</emphasis>
</taxonomicName>
differs for the wider and bisulcate venter. This species differs from
<taxonomicName id="4C73CB8FFFC4FFFE0D00FD0BFB680ED9" authorityName=", SASSAROLI &amp; VENTURI" authorityYear="2012" box="[1107,1229,653,677]" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="evolutus">
<emphasis id="B9076C1EFFC4FFFE0D00FD0BFB680ED9" box="[1107,1229,653,677]" italics="true" pageId="17" pageNumber="101">H. evolutus</emphasis>
</taxonomicName>
chiefly in having a lesser evolute shell from a sub-trapezoidal whorl section, a narrower bisulcate venter and strongly projected and coarser ribs.
</paragraph>
<paragraph id="8BCCB00CFFC4FFFE0A6CFC94FB150F55" blockId="17.[831,1437,258,809]" box="[831,1200,785,809]" pageId="17" pageNumber="101">
<emphasis id="B9076C1EFFC4FFFE0A6CFC94FC680F55" bold="true" box="[831,973,785,809]" pageId="17" pageNumber="101">Occurrence:</emphasis>
Upper
<taxonomicName id="4C73CB8FFFC4FFFE0D4EFC97FBD50F55" box="[1053,1136,786,809]" class="Cephalopoda" family="Hildoceratidae" genus="Hildaites" kingdom="Animalia" order="Ammonoidea" pageId="17" pageNumber="101" phylum="Mollusca" rank="species" species="striatus">
<emphasis id="B9076C1EFFC4FFFE0D4EFC97FBD50F55" box="[1053,1136,786,809]" italics="true" pageId="17" pageNumber="101">Striatus</emphasis>
</taxonomicName>
zone.
</paragraph>
</subSubSection>
</treatment>
</document>