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<document ID-DOI="10.37520/fi.2022.021" ID-GBIF-Dataset="974a6532-7fd7-48eb-97cb-3070fb39cd42" ID-ISSN="2533-4069" ID-Zenodo-Dep="7522607" approvalRequired="1" approvalRequired_for_taxonomicNames="1" checkinTime="1673381723414" checkinUser="felipe" docAuthor="Dernov, Vitaly" docDate="2022" docId="03925E10FFC04259F22BDC4FFA4BFAA5" docLanguage="en" docName="FossilImprint.78.2.489-512.pdf" docOrigin="Fossil Imprint 78 (2)" docSource="http://dx.doi.org/10.37520/fi.2022.021" docStyle="DocumentStyle:0EC54BF35E227CA4627F894F6BA30634.3:FossilImprint.2016-.journal_article" docStyleId="0EC54BF35E227CA4627F894F6BA30634" docStyleName="FossilImprint.2016-.journal_article" docStyleVersion="3" docTitle="Melvilloceras rotaii" docType="treatment" docVersion="9" lastPageNumber="499" masterDocId="FFAB2668FFC94253F14CDA74FFE4FFB9" masterDocTitle="Late Bashkirian Ammonoids From The Mospyne Formation Of The Donets Basin, Ukraine" masterLastPageNumber="512" masterPageNumber="489" pageNumber="498" updateTime="1673899258662" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-NC-ND-3.0">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Late Bashkirian Ammonoids From The Mospyne Formation Of The Donets Basin, Ukraine</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Dernov, Vitaly</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Fossil Imprint</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2022</mods:date>
<mods:detail type="pubDate">
<mods:number>2022-12-20</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>78</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>2</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>489</mods:start>
<mods:end>512</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.37520/fi.2022.021</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.37520/fi.2022.021</mods:identifier>
<mods:identifier type="GBIF-Dataset">974a6532-7fd7-48eb-97cb-3070fb39cd42</mods:identifier>
<mods:identifier type="ISSN">2533-4069</mods:identifier>
<mods:identifier type="Zenodo-Dep">7522607</mods:identifier>
</mods:mods>
<treatment ID-DOI="http://doi.org/10.5281/zenodo.7541563" ID-GBIF-Taxon="208976712" ID-Zenodo-Dep="7541563" LSID="urn:lsid:plazi:treatment:03925E10FFC04259F22BDC4FFA4BFAA5" httpUri="http://treatment.plazi.org/id/03925E10FFC04259F22BDC4FFA4BFAA5" lastPageId="10" lastPageNumber="499" pageId="9" pageNumber="498">
<subSubSection box="[871,1408,1595,1619]" pageId="9" pageNumber="498" type="nomenclature">
<paragraph blockId="9.[871,1408,1595,1619]" box="[871,1408,1595,1619]" pageId="9" pageNumber="498">
<heading box="[871,1408,1595,1619]" centered="true" fontSize="8" level="2" pageId="9" pageNumber="498" reason="2">
<emphasis bold="true" box="[871,1408,1595,1619]" pageId="9" pageNumber="498">
<taxonomicName authority="LIBROVITCH in POPOV, 1979" box="[871,1085,1595,1619]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="9" pageNumber="498" phylum="Mollusca" rank="species" species="rotaii">
<emphasis bold="true" box="[871,1085,1595,1619]" italics="true" pageId="9" pageNumber="498">Melvilloceras rotaii</emphasis>
</taxonomicName>
(LIBROVITCH in
<bibRefCitation author="Popov, A. V." box="[1263,1333,1595,1619]" pageId="9" pageNumber="498" pagination="1 - 119" refId="ref19411" refString="Popov, A. V. (1979): Kamennougol'nye ammonoidei Donbassa i ikh stratigraficheskoe znachenie [Carboniferous ammonoids of the Donets Basin and their stratigraphic significance]. - Trudy VSEGEI, n. s., 220: 1 - 119. (in Russian)" type="journal article" year="1979">POPOV</bibRefCitation>
, 1979)
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection lastPageId="10" lastPageNumber="499" pageId="9" pageNumber="498" type="description">
<paragraph blockId="9.[1084,1195,1627,1651]" box="[1084,1195,1627,1651]" pageId="9" pageNumber="498">
<figureCitation box="[1084,1195,1627,1651]" captionStart="Text-fig" captionStartId="11.[124,205,1626,1647]" captionTargetBox="[125,1441,142,1610]" captionTargetId="figure-164@11.[500,877,691,967]" captionTargetPageId="11" captionText="Text-fig. 8. Ammonoids Melvilloceras rotaii (LIBROVITCH in POPOV, 1979) from the Mospyne Formation. a, b: A slightly laterally compressed specimen IGSU-7/8040, lateral view (a), ventral view (b). c, d: A slightly laterally compressed specimen IGSU-7/472, lateral view (c), ventral view (d). e, f: Specimen IGSU-7/540, lateral view (e), ventral view (f). g–i: Specimen IGSU-7/468, dorsal view (g), lateral view (h), ventral view (i). j: Specimen IGSU-7/6538, dorsal view. k, l: Specimen IGSU-7/620, lateral view (k), ventral view (l). m–q: Lateral views of the conchs showing the different relief of the umbilical nodes; m – specimen IGSU-4/4148, n – specimen IGSU-7/522, o – specimen IGSU-7/468a, p – specimen IGSU-7/472a, q – specimen IGSU-7/316. Scale bars 10 mm." figureDoi="http://doi.org/10.5281/zenodo.7522625" httpUri="https://zenodo.org/record/7522625/files/figure.png" pageId="9" pageNumber="498">Text-fig. 8</figureCitation>
</paragraph>
<paragraph blockId="9.[820,1460,1674,1755]" pageId="9" pageNumber="498">
1979
<taxonomicName box="[896,1091,1675,1696]" class="Cephalopoda" genus="Lutuginoceras" higherTaxonomySource="GBIF" kingdom="Animalia" pageId="9" pageNumber="498" phylum="Mollusca" rank="species" species="rotaii">
<emphasis box="[896,1091,1675,1696]" italics="true" pageId="9" pageNumber="498">Lutuginoceras rotaii</emphasis>
</taxonomicName>
; Popov, p. 86, pl. XI, figs 1, 2, text-fig. 10I.
</paragraph>
<paragraph blockId="9.[820,1460,1674,1755]" box="[820,1388,1733,1755]" pageId="9" pageNumber="498">
2021a
<taxonomicName box="[896,1086,1733,1755]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="9" pageNumber="498" phylum="Mollusca" rank="species" species="rotaii">
<emphasis box="[896,1086,1733,1755]" italics="true" pageId="9" pageNumber="498">Melvilloceras rotaii</emphasis>
</taxonomicName>
; Dernov, p. 13, text-fig. 1A–O.
</paragraph>
<paragraph blockId="9.[820,1459,1779,1868]" pageId="9" pageNumber="498">
H o l o t y p e. Specimen VSEGEI-
<quantity box="[1248,1310,1779,1803]" metricMagnitude="0" metricUnit="m" metricValue="1.8542" pageId="9" pageNumber="498" unit="in" value="73.0">73 in</quantity>
the Russian Geological Research Institute (
<collectingRegion box="[1185,1349,1811,1835]" country="Russia" name="Saint Petersburg" pageId="9" pageNumber="498">St. Petersburg</collectingRegion>
,
<collectingCountry box="[1371,1447,1811,1835]" name="Russia" pageId="9" pageNumber="498">Russia</collectingCountry>
); figured by
<bibRefCitation author="Popov, A. V." box="[936,1082,1844,1868]" pageId="9" pageNumber="498" pagination="1 - 119" refId="ref19411" refString="Popov, A. V. (1979): Kamennougol'nye ammonoidei Donbassa i ikh stratigraficheskoe znachenie [Carboniferous ammonoids of the Donets Basin and their stratigraphic significance]. - Trudy VSEGEI, n. s., 220: 1 - 119. (in Russian)" type="journal article" year="1979">Popov (1979)</bibRefCitation>
in pl. XI, figs 1 and 2.
</paragraph>
<paragraph blockId="9.[820,1459,1891,2012]" pageId="9" pageNumber="498">
Ty p e l o c a l i t y a n d s t r a t i g r a p h i c h o r i z o n. Rus’ko-Orlovka on Krynka River (
<collectingRegion box="[1261,1455,1923,1947]" country="Ukraine" name="Donets'k" pageId="9" pageNumber="498">Donetsk Region</collectingRegion>
,
<collectingCountry box="[820,911,1956,1980]" name="Ukraine" pageId="9" pageNumber="498">Ukraine</collectingCountry>
); Mospyne Formation, G
<subScript attach="left" box="[1203,1211,1969,1983]" fontSize="6" pageId="9" pageNumber="498">4</subScript>
limestone layer (late Bashkirian).
</paragraph>
<paragraph blockId="9.[820,1459,2036,2092]" lastBlockId="10.[129,768,748,836]" lastPageId="10" lastPageNumber="499" pageId="9" pageNumber="498">
D i a g n o s i s.
<taxonomicName authorityName="NASSICHUK" authorityYear="1975" box="[1037,1184,2036,2060]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="9" pageNumber="498" phylum="Mollusca" rank="genus">
<emphasis box="[1037,1184,2036,2060]" italics="true" pageId="9" pageNumber="498">Melvilloceras</emphasis>
</taxonomicName>
has a discoidal and subinvolute conch with narrow convex venter and weakly convex flanks covered with delicate concavo-convex growth lines; umbilical margin almost rectangular with small, sharp nodes.
</paragraph>
<caption ID-Table-UUID="DF44BF8EFFC34259F1CDDAECFEA2FF73" httpUri="http://table.plazi.org/id/DF44BF8EFFC34259F1CDDAECFEA2FF73" pageId="10" pageNumber="499" startId="10.[129,185,152,173]" targetBox="[140,1449,250,665]" targetIsTable="true" targetPageId="10">
<paragraph blockId="10.[129,1482,152,202]" pageId="10" pageNumber="499">
<emphasis bold="true" box="[129,888,152,173]" pageId="10" pageNumber="499">
Table 2. Dimensions (in mm) of
<taxonomicName box="[465,659,152,173]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="rotaii">
<emphasis bold="true" box="[465,659,152,173]" italics="true" pageId="10" pageNumber="499">Melvilloceras rotaii</emphasis>
</taxonomicName>
(LIBROVITCH in
<bibRefCitation author="Popov, A. V." box="[826,888,152,173]" pageId="10" pageNumber="499" pagination="1 - 119" refId="ref19411" refString="Popov, A. V. (1979): Kamennougol'nye ammonoidei Donbassa i ikh stratigraficheskoe znachenie [Carboniferous ammonoids of the Donets Basin and their stratigraphic significance]. - Trudy VSEGEI, n. s., 220: 1 - 119. (in Russian)" type="journal article" year="1979">POPOV</bibRefCitation>
</emphasis>
, 1979). The dimensions of the holotype (
<bibRefCitation author="Popov, A. V." box="[1312,1434,152,173]" pageId="10" pageNumber="499" pagination="1 - 119" refId="ref19411" refString="Popov, A. V. (1979): Kamennougol'nye ammonoidei Donbassa i ikh stratigraficheskoe znachenie [Carboniferous ammonoids of the Donets Basin and their stratigraphic significance]. - Trudy VSEGEI, n. s., 220: 1 - 119. (in Russian)" type="journal article" year="1979">Popov 1979</bibRefCitation>
) are highlighted in grey.
</paragraph>
</caption>
<paragraph pageId="10" pageNumber="499">
<table box="[140,1449,250,665]" colsContinueIn="17.[118,1423,1780,2087]" gridcols="11" gridrows="12" pageId="10" pageNumber="499">
<tr box="[140,1449,250,269]" gridrow="0" pageId="10" pageNumber="499">
<th box="[140,266,250,269]" gridcol="0" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[141,229,250,269]" pageId="10" pageNumber="499">Specimen</emphasis>
</th>
<th box="[412,449,250,269]" gridcol="1" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[416,446,250,269]" pageId="10" pageNumber="499">dm</emphasis>
</th>
<th box="[508,556,250,269]" gridcol="2" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[517,548,250,269]" pageId="10" pageNumber="499">ww</emphasis>
</th>
<th box="[624,661,250,269]" gridcol="3" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[629,656,250,269]" pageId="10" pageNumber="499">wh</emphasis>
</th>
<th box="[733,761,250,269]" gridcol="4" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[733,760,250,269]" pageId="10" pageNumber="499">uw</emphasis>
</th>
<th box="[819,846,250,269]" gridcol="5" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[821,844,250,269]" pageId="10" pageNumber="499">ah</emphasis>
</th>
<th box="[903,969,250,269]" gridcol="6" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[903,969,250,269]" pageId="10" pageNumber="499">ww/dm</emphasis>
</th>
<th box="[1036,1101,250,269]" gridcol="7" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[1036,1101,250,269]" pageId="10" pageNumber="499">ww/wh</emphasis>
</th>
<th box="[1169,1232,250,269]" gridcol="8" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[1169,1232,250,269]" pageId="10" pageNumber="499">uw/dm</emphasis>
</th>
<th box="[1298,1349,250,269]" gridcol="9" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[1298,1349,250,269]" pageId="10" pageNumber="499">WER</emphasis>
</th>
<th box="[1411,1449,250,269]" gridcol="10" gridrow="0" pageId="10" pageNumber="499">
<emphasis bold="true" box="[1411,1449,250,269]" pageId="10" pageNumber="499">IZR</emphasis>
</th>
</tr>
<tr box="[140,1449,286,305]" gridrow="1" pageId="10" pageNumber="499">
<th box="[140,266,286,305]" gridcol="0" gridrow="1" pageId="10" pageNumber="499">IGSU-7/8040</th>
<td box="[412,449,286,305]" gridcol="1" gridrow="1" pageId="10" pageNumber="499">32.1</td>
<td box="[508,556,286,305]" gridcol="2" gridrow="1" pageId="10" pageNumber="499">~11.0</td>
<td box="[624,661,286,305]" gridcol="3" gridrow="1" pageId="10" pageNumber="499">15.0</td>
<td box="[733,761,286,305]" gridcol="4" gridrow="1" pageId="10" pageNumber="499">6.0</td>
<td box="[819,846,286,305]" gridcol="5" gridrow="1" pageId="10" pageNumber="499">–</td>
<td box="[903,969,286,305]" gridcol="6" gridrow="1" pageId="10" pageNumber="499">~0.34</td>
<td box="[1036,1101,286,305]" gridcol="7" gridrow="1" pageId="10" pageNumber="499">~0.73</td>
<td box="[1169,1232,286,305]" gridcol="8" gridrow="1" pageId="10" pageNumber="499">0.19</td>
<td box="[1298,1349,286,305]" gridcol="9" gridrow="1" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,286,305]" gridcol="10" gridrow="1" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,322,341]" gridrow="2" pageId="10" pageNumber="499">
<th box="[140,266,322,341]" gridcol="0" gridrow="2" pageId="10" pageNumber="499">IGSU-7/496a</th>
<td box="[412,449,322,341]" gridcol="1" gridrow="2" pageId="10" pageNumber="499">25.0</td>
<td box="[508,556,322,341]" gridcol="2" gridrow="2" pageId="10" pageNumber="499">–</td>
<td box="[624,661,322,341]" gridcol="3" gridrow="2" pageId="10" pageNumber="499">9.4</td>
<td box="[733,761,322,341]" gridcol="4" gridrow="2" pageId="10" pageNumber="499">5.0</td>
<td box="[819,846,322,341]" gridcol="5" gridrow="2" pageId="10" pageNumber="499">–</td>
<td box="[903,969,322,341]" gridcol="6" gridrow="2" pageId="10" pageNumber="499">–</td>
<td box="[1036,1101,322,341]" gridcol="7" gridrow="2" pageId="10" pageNumber="499">–</td>
<td box="[1169,1232,322,341]" gridcol="8" gridrow="2" pageId="10" pageNumber="499">0.20</td>
<td box="[1298,1349,322,341]" gridcol="9" gridrow="2" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,322,341]" gridcol="10" gridrow="2" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,358,377]" gridrow="3" pageId="10" pageNumber="499">
<th box="[140,266,358,377]" gridcol="0" gridrow="3" pageId="10" pageNumber="499">IGSU-7/468</th>
<td box="[412,449,358,377]" gridcol="1" gridrow="3" pageId="10" pageNumber="499">23.4</td>
<td box="[508,556,358,377]" gridcol="2" gridrow="3" pageId="10" pageNumber="499">11.2</td>
<td box="[624,661,358,377]" gridcol="3" gridrow="3" pageId="10" pageNumber="499">12.3</td>
<td box="[733,761,358,377]" gridcol="4" gridrow="3" pageId="10" pageNumber="499">4.1</td>
<td box="[819,846,358,377]" gridcol="5" gridrow="3" pageId="10" pageNumber="499">7.4</td>
<td box="[903,969,358,377]" gridcol="6" gridrow="3" pageId="10" pageNumber="499">0.48</td>
<td box="[1036,1101,358,377]" gridcol="7" gridrow="3" pageId="10" pageNumber="499">0.91</td>
<td box="[1169,1232,358,377]" gridcol="8" gridrow="3" pageId="10" pageNumber="499">0.18</td>
<td box="[1298,1349,358,377]" gridcol="9" gridrow="3" pageId="10" pageNumber="499">2.14</td>
<td box="[1411,1449,358,377]" gridcol="10" gridrow="3" pageId="10" pageNumber="499">0.40</td>
</tr>
<tr box="[140,1449,394,413]" gridrow="4" pageId="10" pageNumber="499">
<th box="[140,266,394,413]" gridcol="0" gridrow="4" pageId="10" pageNumber="499">IGSU-7/472</th>
<td box="[412,449,394,413]" gridcol="1" gridrow="4" pageId="10" pageNumber="499">20.5</td>
<td box="[508,556,394,413]" gridcol="2" gridrow="4" pageId="10" pageNumber="499">–</td>
<td box="[624,661,394,413]" gridcol="3" gridrow="4" pageId="10" pageNumber="499">9.3</td>
<td box="[733,761,394,413]" gridcol="4" gridrow="4" pageId="10" pageNumber="499">4.7</td>
<td box="[819,846,394,413]" gridcol="5" gridrow="4" pageId="10" pageNumber="499">–</td>
<td box="[903,969,394,413]" gridcol="6" gridrow="4" pageId="10" pageNumber="499">–</td>
<td box="[1036,1101,394,413]" gridcol="7" gridrow="4" pageId="10" pageNumber="499">–</td>
<td box="[1169,1232,394,413]" gridcol="8" gridrow="4" pageId="10" pageNumber="499">0.23</td>
<td box="[1298,1349,394,413]" gridcol="9" gridrow="4" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,394,413]" gridcol="10" gridrow="4" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,430,449]" gridrow="5" pageId="10" pageNumber="499">
<th box="[140,266,430,449]" gridcol="0" gridrow="5" pageId="10" pageNumber="499">IGSU-7/540</th>
<td box="[412,449,430,449]" gridcol="1" gridrow="5" pageId="10" pageNumber="499">19.7</td>
<td box="[508,556,430,449]" gridcol="2" gridrow="5" pageId="10" pageNumber="499">9.3</td>
<td box="[624,661,430,449]" gridcol="3" gridrow="5" pageId="10" pageNumber="499">10.7</td>
<td box="[733,761,430,449]" gridcol="4" gridrow="5" pageId="10" pageNumber="499">4.8</td>
<td box="[819,846,430,449]" gridcol="5" gridrow="5" pageId="10" pageNumber="499">–</td>
<td box="[903,969,430,449]" gridcol="6" gridrow="5" pageId="10" pageNumber="499">0.47</td>
<td box="[1036,1101,430,449]" gridcol="7" gridrow="5" pageId="10" pageNumber="499">0.87</td>
<td box="[1169,1232,430,449]" gridcol="8" gridrow="5" pageId="10" pageNumber="499">0.24</td>
<td box="[1298,1349,430,449]" gridcol="9" gridrow="5" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,430,449]" gridcol="10" gridrow="5" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,466,485]" gridrow="6" pageId="10" pageNumber="499">
<th box="[140,266,466,485]" gridcol="0" gridrow="6" pageId="10" pageNumber="499">VSEGEI–73</th>
<td box="[412,449,466,485]" gridcol="1" gridrow="6" pageId="10" pageNumber="499">15.0</td>
<td box="[508,556,466,485]" gridcol="2" gridrow="6" pageId="10" pageNumber="499">9.0</td>
<td box="[624,661,466,485]" gridcol="3" gridrow="6" pageId="10" pageNumber="499">7.3</td>
<td box="[733,761,466,485]" gridcol="4" gridrow="6" pageId="10" pageNumber="499">3.5</td>
<td box="[819,846,466,485]" gridcol="5" gridrow="6" pageId="10" pageNumber="499">–</td>
<td box="[903,969,466,485]" gridcol="6" gridrow="6" pageId="10" pageNumber="499">0.60</td>
<td box="[1036,1101,466,485]" gridcol="7" gridrow="6" pageId="10" pageNumber="499">1.23</td>
<td box="[1169,1232,466,485]" gridcol="8" gridrow="6" pageId="10" pageNumber="499">0.23</td>
<td box="[1298,1349,466,485]" gridcol="9" gridrow="6" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,466,485]" gridcol="10" gridrow="6" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,502,521]" gridrow="7" pageId="10" pageNumber="499">
<th box="[140,266,502,521]" gridcol="0" gridrow="7" pageId="10" pageNumber="499">IGSU-7/496</th>
<td box="[412,449,502,521]" gridcol="1" gridrow="7" pageId="10" pageNumber="499">14.0</td>
<td box="[508,556,502,521]" gridcol="2" gridrow="7" pageId="10" pageNumber="499">6.7</td>
<td box="[624,661,502,521]" gridcol="3" gridrow="7" pageId="10" pageNumber="499">8.4</td>
<td box="[733,761,502,521]" gridcol="4" gridrow="7" pageId="10" pageNumber="499">3.0</td>
<td box="[819,846,502,521]" gridcol="5" gridrow="7" pageId="10" pageNumber="499">–</td>
<td box="[903,969,502,521]" gridcol="6" gridrow="7" pageId="10" pageNumber="499">0.48</td>
<td box="[1036,1101,502,521]" gridcol="7" gridrow="7" pageId="10" pageNumber="499">0.80</td>
<td box="[1169,1232,502,521]" gridcol="8" gridrow="7" pageId="10" pageNumber="499">0.21</td>
<td box="[1298,1349,502,521]" gridcol="9" gridrow="7" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,502,521]" gridcol="10" gridrow="7" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,538,557]" gridrow="8" pageId="10" pageNumber="499">
<th box="[140,266,538,557]" gridcol="0" gridrow="8" pageId="10" pageNumber="499">IGSU-7/620</th>
<td box="[412,449,538,557]" gridcol="1" gridrow="8" pageId="10" pageNumber="499">13.4</td>
<td box="[508,556,538,557]" gridcol="2" gridrow="8" pageId="10" pageNumber="499">6.1</td>
<td box="[624,661,538,557]" gridcol="3" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[733,761,538,557]" gridcol="4" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[819,846,538,557]" gridcol="5" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[903,969,538,557]" gridcol="6" gridrow="8" pageId="10" pageNumber="499">0.46</td>
<td box="[1036,1101,538,557]" gridcol="7" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[1169,1232,538,557]" gridcol="8" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[1298,1349,538,557]" gridcol="9" gridrow="8" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,538,557]" gridcol="10" gridrow="8" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,574,593]" gridrow="9" pageId="10" pageNumber="499">
<th box="[140,266,574,593]" gridcol="0" gridrow="9" pageId="10" pageNumber="499">IGSU-7/8040a</th>
<td box="[412,449,574,593]" gridcol="1" gridrow="9" pageId="10" pageNumber="499">13.3</td>
<td box="[508,556,574,593]" gridcol="2" gridrow="9" pageId="10" pageNumber="499">7.0</td>
<td box="[624,661,574,593]" gridcol="3" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[733,761,574,593]" gridcol="4" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[819,846,574,593]" gridcol="5" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[903,969,574,593]" gridcol="6" gridrow="9" pageId="10" pageNumber="499">0.53</td>
<td box="[1036,1101,574,593]" gridcol="7" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[1169,1232,574,593]" gridcol="8" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[1298,1349,574,593]" gridcol="9" gridrow="9" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,574,593]" gridcol="10" gridrow="9" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,610,629]" gridrow="10" pageId="10" pageNumber="499">
<th box="[140,266,610,629]" gridcol="0" gridrow="10" pageId="10" pageNumber="499">IGSU-4/316</th>
<td box="[412,449,610,629]" gridcol="1" gridrow="10" pageId="10" pageNumber="499">10.0</td>
<td box="[508,556,610,629]" gridcol="2" gridrow="10" pageId="10" pageNumber="499">–</td>
<td box="[624,661,610,629]" gridcol="3" gridrow="10" pageId="10" pageNumber="499">4.0</td>
<td box="[733,761,610,629]" gridcol="4" gridrow="10" pageId="10" pageNumber="499">3.3</td>
<td box="[819,846,610,629]" gridcol="5" gridrow="10" pageId="10" pageNumber="499">–</td>
<td box="[903,969,610,629]" gridcol="6" gridrow="10" pageId="10" pageNumber="499">–</td>
<td box="[1036,1101,610,629]" gridcol="7" gridrow="10" pageId="10" pageNumber="499">–</td>
<td box="[1169,1232,610,629]" gridcol="8" gridrow="10" pageId="10" pageNumber="499">0.33</td>
<td box="[1298,1349,610,629]" gridcol="9" gridrow="10" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,610,629]" gridcol="10" gridrow="10" pageId="10" pageNumber="499">–</td>
</tr>
<tr box="[140,1449,646,665]" gridrow="11" pageId="10" pageNumber="499">
<th box="[140,266,646,665]" gridcol="0" gridrow="11" pageId="10" pageNumber="499">IGSU-7/6538</th>
<td box="[412,449,646,665]" gridcol="1" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[508,556,646,665]" gridcol="2" gridrow="11" pageId="10" pageNumber="499">10.7</td>
<td box="[624,661,646,665]" gridcol="3" gridrow="11" pageId="10" pageNumber="499">12.5</td>
<td box="[733,761,646,665]" gridcol="4" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[819,846,646,665]" gridcol="5" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[903,969,646,665]" gridcol="6" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[1036,1101,646,665]" gridcol="7" gridrow="11" pageId="10" pageNumber="499">0.86</td>
<td box="[1169,1232,646,665]" gridcol="8" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[1298,1349,646,665]" gridcol="9" gridrow="11" pageId="10" pageNumber="499">–</td>
<td box="[1411,1449,646,665]" gridcol="10" gridrow="11" pageId="10" pageNumber="499">–</td>
</tr>
</table>
</paragraph>
<paragraph blockId="10.[129,767,859,948]" pageId="10" pageNumber="499">
M a t e r i a l.
<specimenCount box="[330,491,859,883]" pageId="10" pageNumber="499" type="generic">13 specimens</specimenCount>
with conch diameter between 7 and
<quantity box="[294,369,891,915]" metricMagnitude="-2" metricUnit="m" metricValue="3.2" pageId="10" pageNumber="499" unit="mm" value="32.0">32 mm</quantity>
from stratigraphic levels No. 2–6 of the Mospyne Formation.
</paragraph>
<paragraph blockId="10.[129,768,970,1989]" pageId="10" pageNumber="499">
D e s c r i p t i o n. The largest available specimen IGSU-7/8040 (
<figureCitation box="[214,361,1002,1026]" captionStart="Text-fig" captionStartId="11.[124,205,1626,1647]" captionTargetBox="[125,1441,142,1610]" captionTargetId="figure-164@11.[500,877,691,967]" captionTargetPageId="11" captionText="Text-fig. 8. Ammonoids Melvilloceras rotaii (LIBROVITCH in POPOV, 1979) from the Mospyne Formation. a, b: A slightly laterally compressed specimen IGSU-7/8040, lateral view (a), ventral view (b). c, d: A slightly laterally compressed specimen IGSU-7/472, lateral view (c), ventral view (d). e, f: Specimen IGSU-7/540, lateral view (e), ventral view (f). g–i: Specimen IGSU-7/468, dorsal view (g), lateral view (h), ventral view (i). j: Specimen IGSU-7/6538, dorsal view. k, l: Specimen IGSU-7/620, lateral view (k), ventral view (l). m–q: Lateral views of the conchs showing the different relief of the umbilical nodes; m – specimen IGSU-4/4148, n – specimen IGSU-7/522, o – specimen IGSU-7/468a, p – specimen IGSU-7/472a, q – specimen IGSU-7/316. Scale bars 10 mm." figureDoi="http://doi.org/10.5281/zenodo.7522625" httpUri="https://zenodo.org/record/7522625/files/figure.png" pageId="10" pageNumber="499">Text-fig. 8a, b</figureCitation>
) with diameter
<quantity box="[524,616,1002,1026]" metricMagnitude="-2" metricUnit="m" metricValue="3.21" pageId="10" pageNumber="499" unit="mm" value="32.1">32.1 mm</quantity>
is subinvolute (uw/dm = 0.19), thinly discoidal (ww/dm ~ 0.34) with a weakly compressed whorl profile (ww/wh ~ 0.73). The venter is strongly convex and narrow; flanks weakly convex and slightly converging towards the ventrolateral shoulder. The umbilical margin is almost rectangular. The umbilical wall is vertical and flattened. The surface of the conch is covered with frequent and clearly visible lamellar lines and delicate growth lines, forming a narrow, deep external sinus, high ventrolateral projection and shallow, wide lateral sinus. On the midflank the growth lines are spaced about
<quantity metricMagnitude="-4" metricUnit="m" metricValue="4.5" metricValueMax="5.0" metricValueMin="4.0" pageId="10" pageNumber="499" unit="mm" value="0.45" valueMax="0.5" valueMin="0.4">0.4 to 0.5 mm</quantity>
apart. The umbilical margin has sharp elongated nodes.
</paragraph>
<paragraph blockId="10.[129,768,970,1989]" pageId="10" pageNumber="499">
Specimen IGSU-7/468 is an almost fully limonitized specimen with a diameter of
<quantity box="[449,545,1452,1476]" metricMagnitude="-2" metricUnit="m" metricValue="2.34" pageId="10" pageNumber="499" unit="mm" value="23.4">23.4 mm</quantity>
(
<figureCitation box="[562,712,1451,1475]" captionStart="Text-fig" captionStartId="11.[124,205,1626,1647]" captionTargetBox="[125,1441,142,1610]" captionTargetId="figure-164@11.[500,877,691,967]" captionTargetPageId="11" captionText="Text-fig. 8. Ammonoids Melvilloceras rotaii (LIBROVITCH in POPOV, 1979) from the Mospyne Formation. a, b: A slightly laterally compressed specimen IGSU-7/8040, lateral view (a), ventral view (b). c, d: A slightly laterally compressed specimen IGSU-7/472, lateral view (c), ventral view (d). e, f: Specimen IGSU-7/540, lateral view (e), ventral view (f). g–i: Specimen IGSU-7/468, dorsal view (g), lateral view (h), ventral view (i). j: Specimen IGSU-7/6538, dorsal view. k, l: Specimen IGSU-7/620, lateral view (k), ventral view (l). m–q: Lateral views of the conchs showing the different relief of the umbilical nodes; m – specimen IGSU-4/4148, n – specimen IGSU-7/522, o – specimen IGSU-7/468a, p – specimen IGSU-7/472a, q – specimen IGSU-7/316. Scale bars 10 mm." figureDoi="http://doi.org/10.5281/zenodo.7522625" httpUri="https://zenodo.org/record/7522625/files/figure.png" pageId="10" pageNumber="499">
Text-fig.
<quantity box="[663,689,1451,1475]" metricMagnitude="-3" metricUnit="kg" metricValue="8.0" pageId="10" pageNumber="499" unit="g" value="8.0">8g</quantity>
–i
</figureCitation>
) and weakly compressed whorl profile (ww/wh = 0.91). The conch is thickly discoidal (ww/dm = 0.48) with narrow umbilicus (uw/dm = 0.18) and high aperture (WER = 2.14); the umbilical wall is flat and narrow; and the umbilical margin is almost rectangular. The venter is strongly convex; flanks are broad and very slightly convex. Ornamented with small, sharp hardly noticeable umbilical nodes.
</paragraph>
<paragraph blockId="10.[129,768,970,1989]" pageId="10" pageNumber="499">
Specimen IGSU-7/472 is a steinkern of
<quantity box="[578,669,1708,1732]" metricMagnitude="-2" metricUnit="m" metricValue="2.05" pageId="10" pageNumber="499" unit="mm" value="20.5">20.5 mm</quantity>
diameter (
<figureCitation box="[136,297,1740,1764]" captionStart="Text-fig" captionStartId="11.[124,205,1626,1647]" captionTargetBox="[125,1441,142,1610]" captionTargetId="figure-164@11.[500,877,691,967]" captionTargetPageId="11" captionText="Text-fig. 8. Ammonoids Melvilloceras rotaii (LIBROVITCH in POPOV, 1979) from the Mospyne Formation. a, b: A slightly laterally compressed specimen IGSU-7/8040, lateral view (a), ventral view (b). c, d: A slightly laterally compressed specimen IGSU-7/472, lateral view (c), ventral view (d). e, f: Specimen IGSU-7/540, lateral view (e), ventral view (f). g–i: Specimen IGSU-7/468, dorsal view (g), lateral view (h), ventral view (i). j: Specimen IGSU-7/6538, dorsal view. k, l: Specimen IGSU-7/620, lateral view (k), ventral view (l). m–q: Lateral views of the conchs showing the different relief of the umbilical nodes; m – specimen IGSU-4/4148, n – specimen IGSU-7/522, o – specimen IGSU-7/468a, p – specimen IGSU-7/472a, q – specimen IGSU-7/316. Scale bars 10 mm." figureDoi="http://doi.org/10.5281/zenodo.7522625" httpUri="https://zenodo.org/record/7522625/files/figure.png" pageId="10" pageNumber="499">Text-fig. 8c, d</figureCitation>
). The conch has a narrow umbilicus (uw/ dm = 0.23); a flattened, narrow umbilical wall and almost rectangular umbilical margin. The venter is strongly convex and narrow; the flanks are slightly convex (nearly flattened) and ornamented with small, sharp umbilical nodes (one node per
<quantity box="[171,235,1901,1925]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="499" unit="mm" value="1.0">1 mm</quantity>
of the umbilical margin). Four narrow concavoconvex constrictions with high ventrolateral projection and deep ventral sinus are prominent on the whorl.
</paragraph>
<paragraph blockId="10.[129,768,2012,2101]" lastBlockId="10.[843,1482,748,1195]" pageId="10" pageNumber="499">
R e m a r k s.
<taxonomicName box="[339,578,2012,2036]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="rotaii">
<emphasis box="[339,578,2012,2036]" italics="true" pageId="10" pageNumber="499">Melvilloceras rotaii</emphasis>
</taxonomicName>
differs from
<taxonomicName authorityName="NASSICHUK" authorityYear="1975" box="[129,400,2044,2068]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="sabinensis">
<emphasis box="[129,400,2044,2068]" italics="true" pageId="10" pageNumber="499">Melvilloceras sabinensis</emphasis>
</taxonomicName>
in the coarser umbilical nodes, which don’t disappear during ontogeny and absence of the longitudinal lirae. The conch form of the studied specimens differs from the single specimen of the type material, studied by Popov (
<typeStatus box="[1042,1137,813,837]" pageId="10" pageNumber="499">holotype</typeStatus>
VSEGEI–73): ww/dm = 0.60 at conch diameter
<quantity box="[1016,1092,846,870]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="10" pageNumber="499" unit="mm" value="15.0">15 mm</quantity>
in the
<typeStatus box="[1171,1264,846,870]" pageId="10" pageNumber="499">holotype</typeStatus>
in comparison with ww/dm = 0.48 at conch diameter
<quantity box="[1209,1284,878,902]" metricMagnitude="-2" metricUnit="m" metricValue="1.4" pageId="10" pageNumber="499" unit="mm" value="14.0">14 mm</quantity>
(specimen IGSU-7/496).In addition, the specimens studied lack the longitudinal lirae noted by
<bibRefCitation author="Popov, A. V." box="[997,1144,944,968]" pageId="10" pageNumber="499" pagination="1 - 119" refId="ref19411" refString="Popov, A. V. (1979): Kamennougol'nye ammonoidei Donbassa i ikh stratigraficheskoe znachenie [Carboniferous ammonoids of the Donets Basin and their stratigraphic significance]. - Trudy VSEGEI, n. s., 220: 1 - 119. (in Russian)" type="journal article" year="1979">Popov (1979)</bibRefCitation>
in the original description. It is possible that longitudinal lirae are characteristic of young conchs; they may be absent on mature conchs (most of the specimens studied have a diameter of about
<quantity box="[1401,1481,1041,1065]" metricMagnitude="-2" metricUnit="m" metricValue="2.0" pageId="10" pageNumber="499" unit="mm" value="20.0">20 mm</quantity>
or more). The conch shape of the described specimens is more closely related to the species
<taxonomicName authorityName="NASSICHUK" authorityYear="1975" box="[1217,1481,1106,1130]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="sabinensis">
<emphasis box="[1217,1481,1106,1130]" italics="true" pageId="10" pageNumber="499">Melvilloceras sabinensis</emphasis>
</taxonomicName>
(ww/dm = 0.47 at
<quantity box="[1048,1144,1139,1163]" metricMagnitude="-2" metricUnit="m" metricValue="1.95" pageId="10" pageNumber="499" unit="mm" value="19.5">19.5 mm</quantity>
diameter in
<taxonomicName authorityName="NASSICHUK" authorityYear="1975" box="[1285,1434,1139,1163]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="sabinensis">
<emphasis box="[1285,1434,1139,1163]" italics="true" pageId="10" pageNumber="499">M. sabinensis</emphasis>
</taxonomicName>
and ww/dm = 0.47 at
<quantity box="[1030,1125,1171,1195]" metricMagnitude="-2" metricUnit="m" metricValue="1.97" pageId="10" pageNumber="499" unit="mm" value="19.7">19.7 mm</quantity>
diameter in
<taxonomicName box="[1259,1353,1172,1195]" class="Cephalopoda" family="Reticuloceratidae" genus="Melvilloceras" kingdom="Animalia" order="Ammonoidea" pageId="10" pageNumber="499" phylum="Mollusca" rank="species" species="rotaii">
<emphasis box="[1259,1353,1172,1195]" italics="true" pageId="10" pageNumber="499">M. rotaii</emphasis>
</taxonomicName>
).
</paragraph>
<paragraph blockId="10.[843,1482,1219,1308]" pageId="10" pageNumber="499">
O c c u r r e n c e. Late Bashkirian, Mospyne Formation (shale
<quantity box="[921,996,1252,1276]" metricMagnitude="2" metricUnit="m" metricValue="1.0" pageId="10" pageNumber="499" unit="m" value="100.0">100 m</quantity>
below the G
<subScript attach="left" box="[1156,1164,1264,1278]" fontSize="6" pageId="10" pageNumber="499">1</subScript>
<superScript attach="left" box="[1164,1172,1250,1264]" fontSize="6" pageId="10" pageNumber="499">2</superScript>
limestone layer to the G
<subScript attach="left" box="[1474,1482,1264,1278]" fontSize="6" pageId="10" pageNumber="499">4</subScript>
limestone layer; see
<figureCitation box="[1061,1174,1284,1308]" captionStart="Text-fig" captionStartId="7.[106,187,1752,1773]" captionTargetPageId="7" captionText="Text-fig. 6. Stratigraphic distribution of ammonoids in the Mospyne Formation. The lithological symbols are the same as in Text-fig. 2." figureDoi="http://doi.org/10.5281/zenodo.7542140" httpUri="https://zenodo.org/record/7542140/files/figure.png" pageId="10" pageNumber="499">Text-fig. 6</figureCitation>
); Donets Basin (
<collectingCountry box="[1352,1444,1284,1308]" name="Ukraine" pageId="10" pageNumber="499">Ukraine</collectingCountry>
).
</paragraph>
</subSubSection>
</treatment>
</document>
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