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<mods:title id="63FCB744B9D007D9E4FF9A65649758D9">Systematics, palaeoecology and taphonomy of Turonian oysters from the northern Gabon Coastal Basin</mods:title>
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<treatment id="03A9D86FFA78FFDD3C7492B75A739500" ID-DOI="http://doi.org/10.5281/zenodo.4536457" ID-GBIF-Taxon="137584607" ID-Zenodo-Dep="4536457" LSID="urn:lsid:plazi:treatment:03A9D86FFA78FFDD3C7492B75A739500" httpUri="http://treatment.plazi.org/id/03A9D86FFA78FFDD3C7492B75A739500" lastPageId="5" lastPageNumber="218" pageId="3" pageNumber="216">
<subSubSection id="C31A3AF2FA78FFDB3C7492B75CF0911D" box="[856,1412,1524,1551]" pageId="3" pageNumber="216" type="nomenclature">
<paragraph id="8BBF6979FA78FFDB3C7492B75CF0911D" blockId="3.[856,1412,1524,1583]" box="[856,1412,1524,1551]" pageId="3" pageNumber="216">
<heading id="D0F7DE15FA78FFDB3C7492B75CF0911D" box="[856,1412,1524,1551]" centered="true" fontSize="11" level="4" pageId="3" pageNumber="216" reason="4">
<taxonomicName id="4C0012FAFA78FFDB3C7492B75CF0911D" authorityName="Lamarck" authorityYear="1801" box="[856,1412,1524,1551]" class="Bivalvia" family="Gryphaeidae" genus="Rhynchostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="3" pageNumber="216" phylum="Mollusca" rank="species" species="cf. suborbiculatum">
<emphasis id="B974B56BFA78FFDB3C7492B75A81911D" bold="true" box="[856,1013,1524,1551]" italics="true" pageId="3" pageNumber="216">Rhynchostreon</emphasis>
cf.
<emphasis id="B974B56BFA78FFDB3B3192B75DB3911D" bold="true" box="[1053,1223,1524,1551]" italics="true" pageId="3" pageNumber="216">suborbiculatum</emphasis>
(
<bibRefCitation id="EF911488FA78FFDB3BF992B65C08911D" author="LAMARCK J. B. P." bookContentInfo="432 p." box="[1237,1404,1525,1551]" journalOrPublisher="Deterville, Paris" pageId="3" pageNumber="216" publicationUrl="http://www.biodiversitylibrary.org/ bibliography/14255" refString="LAMARCK J. B. P. 1801. - Systeme des animaux sans vertebres. Deterville, Paris, 432 p. http: // www. biodiversitylibrary. org / bibliography / 14255" title="Systeme des animaux sans vertebres" type="book" year="1801">Lamarck, 1801</bibRefCitation>
)
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C31A3AF2FA78FFDB3B0091565DDB913D" box="[1068,1199,1556,1583]" pageId="3" pageNumber="216" type="description">
<paragraph id="8BBF6979FA78FFDB3B0091565DDB913D" blockId="3.[856,1412,1524,1583]" box="[1068,1199,1556,1583]" pageId="3" pageNumber="216">
<heading id="D0F7DE15FA78FFDB3B0091565DDB913D" box="[1068,1199,1556,1583]" centered="true" fontSize="11" level="4" pageId="3" pageNumber="216" reason="1">
(
<figureCitation id="133B75FCFA78FFDB3B1991575D00913D" box="[1077,1140,1556,1583]" captionStart="FIG" captionStartId="4.[132,142,1826,1844]" captionTargetBox="[132,1455,215,1783]" captionTargetId="figure@4.[132,1455,215,1783]" captionTargetPageId="4" captionText="FIG. 3. — A, Gyrostrea A MDG/LBV/Lm-13;B, C, Rhynchostreon cf.suborbiculatum (Lamarck,1801) MDG/LBV/Lm-9;D-F, Gryphaeostrea sp.;D-E, MDG/LBV/Lm- 7.1, F. MDG/LBV/Lm-7.2; G, H, Curvostrea tevesthensis (Coquand,1862) MDG/LBV/Lm-11;I-M, Ilymatogyra (Afrogyra) africana (Lamarck, 1801); I, J, MDG/LBV/ Lm-8.3,K.MDG/LBV/Lm-8.2,L-M.MDG/LBV/Lm-8.1;N, Q, Ostreidea gen.et sp.;indet MDG/LBV/Lm-34;O,P.Pycnodonte sp.MDG/LBV/Lm-10.Scale bar:1 cm." httpUri="https://zenodo.org/record/1069854/files/figure.png" pageId="3" pageNumber="216">Fig. 3</figureCitation>
B, C)
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C31A3AF2FA78FFDB3C0191125AB69043" pageId="3" pageNumber="216" type="reference_group">
<paragraph id="8BBF6979FA78FFDB3C0191125ABA9191" blockId="3.[813,1456,1617,1667]" pageId="3" pageNumber="216">
<taxonomicName id="4C0012FAFA78FFDB3C0191125AF2917B" authorityName="Lamarck" authorityYear="1801" box="[813,902,1617,1641]" class="Bivalvia" family="Gryphaeidae" genus="Gryphaea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="3" pageNumber="216" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA78FFDB3C0191125AF2917B" box="[813,902,1617,1641]" italics="true" pageId="3" pageNumber="216">Gryphaea</emphasis>
</taxonomicName>
cf.
<emphasis id="B974B56BFA78FFDB3C8A91125D56917B" box="[934,1058,1617,1641]" italics="true" pageId="3" pageNumber="216">suborbiculata</emphasis>
<bibRefCitation id="EF911488FA78FFDB3B0B91125DC3917B" author="LAMARCK J. B. P." bookContentInfo="432 p." box="[1063,1207,1617,1641]" journalOrPublisher="Deterville, Paris" pageId="3" pageNumber="216" publicationUrl="http://www.biodiversitylibrary.org/ bibliography/14255" refString="LAMARCK J. B. P. 1801. - Systeme des animaux sans vertebres. Deterville, Paris, 432 p. http: // www. biodiversitylibrary. org / bibliography / 14255" title="Systeme des animaux sans vertebres" type="book" year="1801">Lamarck, 1801</bibRefCitation>
: 398, figs
<emphasis id="B974B56BFA78FFDB3A3B91125C5E917A" box="[1303,1322,1617,1640]" italics="true" pageId="3" pageNumber="216">in</emphasis>
Knorr (1801: pl. 62; figs 1, 2).
</paragraph>
<paragraph id="8BBF6979FA78FFDB3C0191DD5CDB91A4" blockId="3.[813,1455,1694,1719]" box="[813,1455,1694,1719]" pageId="3" pageNumber="216">
<taxonomicName id="4C0012FAFA78FFDB3C0191DD5ADF91A4" authorityName="Bayle" authorityYear="1878" box="[813,939,1694,1718]" class="Bivalvia" family="Gryphaeidae" genus="Rhynchostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="3" pageNumber="216" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA78FFDB3C0191DD5ADF91A4" box="[813,939,1694,1718]" italics="true" pageId="3" pageNumber="216">Rhynchostreon</emphasis>
</taxonomicName>
cf.
<emphasis id="B974B56BFA78FFDB3CE691DD5D0291A4" box="[970,1142,1694,1718]" italics="true" pageId="3" pageNumber="216">columbum mermeti</emphasis>
<bibRefCitation id="EF911488FA78FFDB3BA791DD5C7791A5" author="FRENEIX S." box="[1163,1283,1694,1719]" journalOrPublisher="Notes et Memoires du Service geologique du Maroc" pageId="3" pageNumber="216" pagination="49 - 255" part="228" refString="FRENEIX S. 1972. - Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional). Notes et Memoires du Service geologique du Maroc 228: 49 - 255." title="Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional)" type="journal article" year="1972">Freneix 1972</bibRefCitation>
: 89, pl. 5, figs 4, 5.
</paragraph>
<paragraph id="8BBF6979FA78FFDB3C0191925CDB9016" blockId="3.[813,1455,1745,1796]" pageId="3" pageNumber="216">
<taxonomicName id="4C0012FAFA78FFDB3C0191925AC391FB" authorityName="Bayle" authorityYear="1878" box="[813,951,1745,1769]" class="Bivalvia" family="Gryphaeidae" genus="Rhynchostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="3" pageNumber="216" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA78FFDB3C0191925AC391FB" box="[813,951,1745,1769]" italics="true" pageId="3" pageNumber="216">Rhynchostreon</emphasis>
</taxonomicName>
cf.
<emphasis id="B974B56BFA78FFDB3CCC91925D0391FB" box="[992,1143,1745,1769]" italics="true" pageId="3" pageNumber="216">suborbiculatum</emphasis>
<bibRefCitation id="EF911488FA78FFDB3BB991925C6D91F8" author="FISCHER J. C." bookContentInfo="444 p." box="[1173,1305,1745,1770]" journalOrPublisher="Masson, Paris" pageId="3" pageNumber="216" refString="FISCHER J. C. 1980. - Fossiles de France et des regions limitrophes. Guides geologiques regionaux. Masson, Paris, 444 p." title="Fossiles de France et des regions limitrophes" type="book" year="1980">Fischer 1980</bibRefCitation>
: 250, pl. 121; figs 7, 8. —
<bibRefCitation id="EF911488FA78FFDB3CB591AF5D699016" author="MALCHUS N." box="[921,1053,1772,1796]" journalOrPublisher="Berliner Geowissenschaftliche Abhandlungen (Reihe A)" pageId="3" pageNumber="216" pagination="1 - 231" part="125" refString="MALCHUS N. 1990. - Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik). Berliner Geowissenschaftliche Abhandlungen (Reihe A) 125: 1 - 231." title="Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik)" type="journal article" year="1990">Malchus 1990</bibRefCitation>
: 132-133. —
<bibRefCitation id="EF911488FA78FFDB3BB391AF5C729016" author="VIDET B &amp; These de l'Universite de Rennes" bookContentInfo="263 p." box="[1183,1286,1772,1796]" journalOrPublisher="Memoire dell'Instituto Geologico della Universita di Padova" pageId="3" pageNumber="216" pagination="1" refString="VIDET B. 2003 - Dynamique des paleoenvironnements a huitres du Cretace superieur Nord-Aquitain (SO France) et du Mio-Pliocene Andalou (SE Espagne). These de l'Universite de Rennes 1, 263 p." title="Dynamique des paleoenvironnements a huitres du Cretace superieur Nord-Aquitain (SO France) et du Mio-Pliocene Andalou (SE Espagne)" type="book" year="2003">Videt 2003</bibRefCitation>
: 24, pl. 5, figs 1-8.
</paragraph>
<paragraph id="8BBF6979FA78FFDB3C01905C5AB69043" blockId="3.[813,1456,1823,1874]" pageId="3" pageNumber="216">
<emphasis id="B974B56BFA78FFDB3C01905C5D7B9025" box="[813,1039,1823,1847]" italics="true" pageId="3" pageNumber="216">
<taxonomicName id="4C0012FAFA78FFDB3C01905C5AC39025" authorityName="Bayle" authorityYear="1878" box="[813,951,1823,1847]" class="Bivalvia" family="Gryphaeidae" genus="Rhynchostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="3" pageNumber="216" phylum="Mollusca" rank="genus">Rhynchostreon</taxonomicName>
mermeti
</emphasis>
<bibRefCitation id="EF911488FA78FFDB3B00905C5DCB9025" author="MALCHUS N." box="[1068,1215,1823,1847]" journalOrPublisher="Berliner Geowissenschaftliche Abhandlungen (Reihe A)" pageId="3" pageNumber="216" pagination="1 - 231" part="125" refString="MALCHUS N. 1990. - Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik). Berliner Geowissenschaftliche Abhandlungen (Reihe A) 125: 1 - 231." title="Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik)" type="journal article" year="1990">Malchus 1990</bibRefCitation>
: 128, pl. 8, figs 15-17; pl. 9, figs 5-21.
</paragraph>
</subSubSection>
<subSubSection id="C31A3AF2FA78FFDB3C01902F5D8E9097" box="[813,1274,1900,1925]" pageId="3" pageNumber="216" type="materials_examined">
<paragraph id="8BBF6979FA78FFDB3C01902F5D8E9097" blockId="3.[813,1274,1900,1925]" box="[813,1274,1900,1925]" pageId="3" pageNumber="216">
<emphasis id="B974B56BFA78FFDB3C01902F5AFB9090" bold="true" box="[813,911,1900,1924]" pageId="3" pageNumber="216">MATERIAL</emphasis>
. — 1 specimen (MDG/LBV/Lm-9).
</paragraph>
</subSubSection>
<subSubSection id="C31A3AF2FA78FFDB3C0190DC5DF890FF" pageId="3" pageNumber="216" type="distribution">
<paragraph id="8BBF6979FA78FFDB3C0190DC5DF890FF" blockId="3.[813,1456,1951,2029]" pageId="3" pageNumber="216">
<emphasis id="B974B56BFA78FFDB3C0190DC5AC790A7" bold="true" box="[813,947,1951,1975]" pageId="3" pageNumber="216">OCCURRENCE</emphasis>
. — Upper Cretaceous of Europe (
<bibRefCitation id="EF911488FA78FFDB3BD990E35C1B90AA" author="FISCHER J. C." bookContentInfo="444 p." box="[1269,1391,1952,1976]" journalOrPublisher="Masson, Paris" pageId="3" pageNumber="216" refString="FISCHER J. C. 1980. - Fossiles de France et des regions limitrophes. Guides geologiques regionaux. Masson, Paris, 444 p." title="Fossiles de France et des regions limitrophes" type="book" year="1980">Fischer 1980</bibRefCitation>
;
<bibRefCitation id="EF911488FA78FFDB3A5690E35A1490C0" author="VIDET B &amp; These de l'Universite de Rennes" bookContentInfo="263 p." journalOrPublisher="Memoire dell'Instituto Geologico della Universita di Padova" pageId="3" pageNumber="216" pagination="1" refString="VIDET B. 2003 - Dynamique des paleoenvironnements a huitres du Cretace superieur Nord-Aquitain (SO France) et du Mio-Pliocene Andalou (SE Espagne). These de l'Universite de Rennes 1, 263 p." title="Dynamique des paleoenvironnements a huitres du Cretace superieur Nord-Aquitain (SO France) et du Mio-Pliocene Andalou (SE Espagne)" type="book" year="2003">Videt 2003</bibRefCitation>
), North Africa (
<bibRefCitation id="EF911488FA78FFDB3CD790F95D0E90C0" author="FRENEIX S." box="[1019,1146,1978,2002]" journalOrPublisher="Notes et Memoires du Service geologique du Maroc" pageId="3" pageNumber="216" pagination="49 - 255" part="228" refString="FRENEIX S. 1972. - Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional). Notes et Memoires du Service geologique du Maroc 228: 49 - 255." title="Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional)" type="journal article" year="1972">Freneix 1972</bibRefCitation>
;
<bibRefCitation id="EF911488FA78FFDB3BA990F95C6490C0" author="MALCHUS N." box="[1157,1296,1978,2002]" journalOrPublisher="Berliner Geowissenschaftliche Abhandlungen (Reihe A)" pageId="3" pageNumber="216" pagination="1 - 231" part="125" refString="MALCHUS N. 1990. - Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik). Berliner Geowissenschaftliche Abhandlungen (Reihe A) 125: 1 - 231." title="Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik)" type="journal article" year="1990">Malchus 1990</bibRefCitation>
). In Gabon, this species is recorded for the first time.
</paragraph>
</subSubSection>
<caption id="DF7F39F1FA78FFDB3FA8908058E190F9" httpUri="https://zenodo.org/record/1069852/files/figure.svg" pageId="3" pageNumber="216" targetBox="[140,773,215,1917]" targetPageId="3">
<paragraph id="8BBF6979FA78FFDB3FA8908058E190F9" blockId="3.[132,775,1987,2027]" pageId="3" pageNumber="216">FIG. 2. — Lithostratigraphy of the PK 12 section plotted against occurrence of oysters, gastropods and bivalve.</paragraph>
</caption>
<caption id="DF7F39F1FA7FFFDC3FA890615CC49073" httpUri="https://zenodo.org/record/1069854/files/figure.png" pageId="4" pageNumber="217" targetBox="[132,1455,215,1783]" targetPageId="4">
<paragraph id="8BBF6979FA7FFFDC3FA890615CC49073" blockId="4.[132,1456,1825,1889]" pageId="4" pageNumber="217">
FIG. 3. —
<emphasis id="B974B56BFA7FFFDC3FFF906159949026" bold="true" box="[211,224,1826,1844]" pageId="4" pageNumber="217">A</emphasis>
,
<taxonomicName id="4C0012FAFA7FFFDC3FC69062584C9021" authorityName="Mirkamalov" authorityYear="1963" box="[234,312,1825,1843]" class="Bivalvia" family="Gryphaeidae" genus="Gyrostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA7FFFDC3FC69062584C9021" box="[234,312,1825,1843]" italics="true" pageId="4" pageNumber="217">Gyrostrea</emphasis>
</taxonomicName>
A MDG/LBV/Lm-13;
<emphasis id="B974B56BFA7FFFDC3ECA906158879026" bold="true" box="[486,499,1826,1844]" pageId="4" pageNumber="217">B</emphasis>
,
<emphasis id="B974B56BFA7FFFDC3ED190615B7F9026" bold="true" box="[509,523,1826,1844]" pageId="4" pageNumber="217">C</emphasis>
,
<taxonomicName id="4C0012FAFA7FFFDC3D3990615BFB9026" authorityName="Bayle" authorityYear="1878" box="[533,655,1826,1844]" class="Bivalvia" family="Gryphaeidae" genus="Rhynchostreon" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA7FFFDC3D3990615BFB9026" box="[533,655,1826,1844]" italics="true" pageId="4" pageNumber="217">Rhynchostreon</emphasis>
</taxonomicName>
cf.
<emphasis id="B974B56BFA7FFFDC3D8290615A5F9026" box="[686,811,1826,1844]" italics="true" pageId="4" pageNumber="217">suborbiculatum</emphasis>
(Lamarck, 1801) MDG/LBV/Lm-9;
<emphasis id="B974B56BFA7FFFDC3B6990615D129026" bold="true" box="[1093,1126,1826,1844]" pageId="4" pageNumber="217">D -F,</emphasis>
<taxonomicName id="4C0012FAFA7FFFDC3B4090625D969021" authorityName="Conrad" authorityYear="1865" box="[1132,1250,1825,1843]" class="Bivalvia" family="Gryphaeidae" genus="Gryphaeostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA7FFFDC3B4090625D969021" box="[1132,1250,1825,1843]" italics="true" pageId="4" pageNumber="217">Gryphaeostrea</emphasis>
</taxonomicName>
sp.;
<emphasis id="B974B56BFA7FFFDC3A2790615C589026" bold="true" box="[1291,1324,1826,1844]" pageId="4" pageNumber="217">D -E</emphasis>
, MDG/LBV/Lm- 7.1, F. MDG/LBV/Lm-7.2;
<emphasis id="B974B56BFA7FFFDC3E76907B581C9058" bold="true" box="[346,360,1848,1866]" pageId="4" pageNumber="217">G</emphasis>
,
<emphasis id="B974B56BFA7FFFDC3E5F907A58F59059" bold="true" box="[371,385,1849,1867]" pageId="4" pageNumber="217">H</emphasis>
,
<emphasis id="B974B56BFA7FFFDC3EA0907B5B3A9058" box="[396,590,1848,1866]" italics="true" pageId="4" pageNumber="217">
<taxonomicName id="4C0012FAFA7FFFDC3EA0907B58909058" authorityName="Vyalov" authorityYear="1936" box="[396,484,1848,1866]" class="Bivalvia" family="Ostreidae" genus="Curvostrea" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">Curvostrea</taxonomicName>
tevesthensis
</emphasis>
(Coquand, 1862) MDG/LBV/Lm-11;
<emphasis id="B974B56BFA7FFFDC3C50907A5AEE9059" bold="true" box="[892,922,1848,1867]" pageId="4" pageNumber="217">I -M</emphasis>
,
<taxonomicName id="4C0012FAFA7FFFDC3C88907B5D229058" authority="(Afrogyra)" authorityName="africana - Seeling &amp; Bengtson" authorityYear="1999" baseAuthorityName="Afrogyra" box="[932,1110,1848,1866]" class="Bivalvia" family="Gryphaeidae" genus="Ilymatogyra" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA7FFFDC3C88907B5D759058" box="[932,1025,1848,1866]" italics="true" pageId="4" pageNumber="217">Ilymatogyra</emphasis>
(
<emphasis id="B974B56BFA7FFFDC3B21907B5D259058" box="[1037,1105,1848,1866]" italics="true" pageId="4" pageNumber="217">Afrogyra</emphasis>
)
</taxonomicName>
<emphasis id="B974B56BFA7FFFDC3B70907B5DE89058" box="[1116,1180,1848,1866]" italics="true" pageId="4" pageNumber="217">africana</emphasis>
(Lamarck, 1801);
<emphasis id="B974B56BFA7FFFDC3A1C907A5C419059" bold="true" box="[1328,1333,1849,1867]" pageId="4" pageNumber="217">I</emphasis>
,
<emphasis id="B974B56BFA7FFFDC3A6D907A5C3F9059" bold="true" box="[1345,1355,1849,1867]" pageId="4" pageNumber="217">J</emphasis>
, MDG/LBV/ Lm-8.3, K. MDG/LBV/Lm-8.2, L-M. MDG/LBV/Lm-8.1;
<emphasis id="B974B56BFA7FFFDC3D6D900C5B3B9073" bold="true" box="[577,591,1871,1889]" pageId="4" pageNumber="217">N</emphasis>
,
<emphasis id="B974B56BFA7FFFDC3D74900C5B129073" bold="true" box="[600,614,1871,1889]" pageId="4" pageNumber="217">Q</emphasis>
, Ostreidea gen. et sp.; indet MDG/LBV/Lm-34; O, P.
<taxonomicName id="4C0012FAFA7FFFDC3B3C900C5D059073" authorityName="Fischer de Waldheim" authorityYear="1835" box="[1040,1137,1871,1889]" class="Bivalvia" family="Gryphaeidae" genus="Pycnodonte" higherTaxonomySource="GBIF" kingdom="Animalia" order="Ostreoida" pageId="4" pageNumber="217" phylum="Mollusca" rank="genus">
<emphasis id="B974B56BFA7FFFDC3B3C900C5D059073" box="[1040,1137,1871,1889]" italics="true" pageId="4" pageNumber="217">Pycnodonte</emphasis>
</taxonomicName>
sp. MDG/LBV/Lm-10. Scale bar: 1 cm.
</paragraph>
</caption>
<subSubSection id="C31A3AF2FA7FFFDC3FA890D05CFA90FC" pageId="4" pageNumber="217" type="description">
<paragraph id="8BBF6979FA7FFFDC3FA890D0586190B9" blockId="4.[132,776,1939,2030]" box="[132,277,1939,1965]" pageId="4" pageNumber="217">
<heading id="D0F7DE15FA7FFFDC3FA890D0586190B9" allCaps="true" bold="true" box="[132,277,1939,1965]" fontSize="10" level="3" pageId="4" pageNumber="217" reason="6">
<emphasis id="B974B56BFA7FFFDC3FA890D0586190B9" bold="true" box="[132,277,1939,1965]" pageId="4" pageNumber="217">DESCRIPTION</emphasis>
</heading>
</paragraph>
<paragraph id="8BBF6979FA7FFFDC3FA890F05A7C90FF" blockId="4.[132,776,1939,2030]" pageId="4" pageNumber="217">Shell, represented only by left valve, is large, inequivalve, elliptical shape in outline. Umbo is small, very opisthogyrate.</paragraph>
<paragraph id="8BBF6979FA7FFFDC3C0190D05CFA90FC" blockId="4.[813,1455,1939,2030]" pageId="4" pageNumber="217">Anterior margin is curved into approximately semicircular shape. Posterior margin is slightly curved. Attachment area is small. Ornament consists of ribs in posterodorsal part.</paragraph>
</subSubSection>
<subSubSection id="C31A3AF2FA7EFFDD3FA8979A5A739500" pageId="5" pageNumber="218" type="discussion">
<paragraph id="8BBF6979FA7EFFDD3FA8979A59AA97E3" blockId="5.[132,775,217,531]" box="[132,222,217,243]" pageId="5" pageNumber="218">
<heading id="D0F7DE15FA7EFFDD3FA8979A59AA97E3" allCaps="true" bold="true" box="[132,222,217,243]" fontSize="10" level="3" pageId="5" pageNumber="218" reason="6">
<emphasis id="B974B56BFA7EFFDD3FA8979A59AA97E3" bold="true" box="[132,222,217,243]" pageId="5" pageNumber="218">REMARK</emphasis>
</heading>
</paragraph>
<paragraph id="8BBF6979FA7EFFDD3FA897BA58F69641" blockId="5.[132,775,217,531]" pageId="5" pageNumber="218">
This morphotype is doubtfully assigned to
<emphasis id="B974B56BFA7EFFDD3D6597B95A739601" box="[585,775,249,275]" italics="true" pageId="5" pageNumber="218">R. suborbiculatum</emphasis>
(
<bibRefCitation id="EF911488FA7EFFDD3FA7965A58479621" author="LAMARCK J. B. P." bookContentInfo="432 p." box="[139,307,281,307]" journalOrPublisher="Deterville, Paris" pageId="5" pageNumber="218" publicationUrl="http://www.biodiversitylibrary.org/ bibliography/14255" refString="LAMARCK J. B. P. 1801. - Systeme des animaux sans vertebres. Deterville, Paris, 432 p. http: // www. biodiversitylibrary. org / bibliography / 14255" title="Systeme des animaux sans vertebres" type="book" year="1801">Lamarck, 1801</bibRefCitation>
) because of the presence of ribs in posterodorsal part of left valve.
</paragraph>
<paragraph id="8BBF6979FA7EFFDD3FB7961A5A739500" blockId="5.[132,775,217,531]" pageId="5" pageNumber="218">
<emphasis id="B974B56BFA7EFFDD3FB7961A58259661" box="[155,337,345,371]" italics="true" pageId="5" pageNumber="218">R. suborbiculatum</emphasis>
shows great similarities to
<emphasis id="B974B56BFA7EFFDD3D4D961A5BBB9660" box="[609,719,345,370]" italics="true" pageId="5" pageNumber="218">R. mermeti</emphasis>
(
<bibRefCitation id="EF911488FA7EFFDD3DF1961A58799686" author="COQUAND H. M." bookContentInfo="343 p." journalOrPublisher="Geologie et paleontologie de la region sud de la province de Constantine. Arnaud, Marseille" pageId="5" pageNumber="218" refString="COQUAND H. M. 1862. - Geologie et paleontologie de la region sud de la province de Constantine. Arnaud, Marseille, 343 p." type="book" year="1862">Coquand, 1862</bibRefCitation>
). For discussion concerning this topic, the reader is referred to
<bibRefCitation id="EF911488FA7EFFDD3E2B96DB58D496A1" author="FRENEIX S." box="[263,416,408,435]" journalOrPublisher="Notes et Memoires du Service geologique du Maroc" pageId="5" pageNumber="218" pagination="49 - 255" part="228" refString="FRENEIX S. 1972. - Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional). Notes et Memoires du Service geologique du Maroc 228: 49 - 255." title="Les mollusques bivalves du Bassin cotier de Tarfaya (Maroc meridional)" type="journal article" year="1972">Freneix (1972)</bibRefCitation>
,
<bibRefCitation id="EF911488FA7EFFDD3E8696DB5BD796A1" author="FRENEIX S. &amp; VIAUD J. M." box="[426,675,408,435]" journalOrPublisher="Bulletin trimestriel de la Societe geologique de Normandie et Amis du Museum du Havre" pageId="5" pageNumber="218" pagination="13 - 19" part="73" refString="FRENEIX S. &amp; VIAUD J. M. 1986. - Huitres du Cretace superieur du Bassin de Challans-Commequiers (Vendee). Biostratigraphie, taxinomie, paleobiologie. Bulletin trimestriel de la Societe geologique de Normandie et Amis du Museum du Havre 73 (1 - 2): 13 - 19." title="Huitres du Cretace superieur du Bassin de Challans-Commequiers (Vendee). Biostratigraphie, taxinomie, paleobiologie" type="journal article" year="1986">Freneix &amp; Viaud (1986)</bibRefCitation>
,
<bibRefCitation id="EF911488FA7EFFDD3D8196DB59B996C1" author="MALCHUS N." journalOrPublisher="Berliner Geowissenschaftliche Abhandlungen (Reihe A)" pageId="5" pageNumber="218" pagination="1 - 231" part="125" refString="MALCHUS N. 1990. - Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik). Berliner Geowissenschaftliche Abhandlungen (Reihe A) 125: 1 - 231." title="Revision der krei-Austern (Bivalvia: Pteriomorphia) Agyptens (Biostratigraphie, Systematik)" type="journal article" year="1990">Malchus (1990)</bibRefCitation>
,
<bibRefCitation id="EF911488FA7EFFDD3FFB96FB58F296C1" author="AQRABAWI M." box="[215,390,440,467]" journalOrPublisher="Mitteilungen aus dem Geologisch-Pala ¨ ontologischen Institut der Universitat Hamburg" pageId="5" pageNumber="218" pagination="1 - 136" part="75" refString="AQRABAWI M. 1993. - Oysters (Bivalvia - Pteriomorphia) of the Upper Cretaceous rocks of Jordan: palaeontology, stratigraphy and comparison with the Upper Cretaceous oysters of northwest Europe. Mitteilungen aus dem Geologisch-Pala ¨ ontologischen Institut der Universitat Hamburg 75: 1 - 136." title="Oysters (Bivalvia - Pteriomorphia) of the Upper Cretaceous rocks of Jordan: palaeontology, stratigraphy and comparison with the Upper Cretaceous oysters of northwest Europe" type="journal article" year="1993">Aqrabawi (1993)</bibRefCitation>
,
<bibRefCitation id="EF911488FA7EFFDD3EBF96FA5B5B96C1" author="COOPER M. R." box="[403,559,440,467]" journalOrPublisher="Durban Museum Novitates" pageId="5" pageNumber="218" pagination="1 - 48" part="20" refString="COOPER M. R. 1995. - Exogyrid oysters (Bivalvia: Gryphaeoidea) from the Cretaceous of southeast Africa. Part 1. Durban Museum Novitates 20: 1 - 48." title="Exogyrid oysters (Bivalvia: Gryphaeoidea) from the Cretaceous of southeast Africa. Part 1." type="journal article" year="1995">Cooper (1995)</bibRefCitation>
,
<bibRefCitation id="EF911488FA7EFFDD3D1696FB59BC96E1" author="SEELING J. &amp; BENGTSON P." journalOrPublisher="Cretaceous Research" pageId="5" pageNumber="218" pagination="747 - 765" part="20" publicationUrl="10.1006/cres.1999.0190" refString="SEELING J. &amp; BENGTSON P. 1999. - Cenomanian oyster from the Sergipe Basin, Brazil. Cretaceous Research 20: 747 - 765. https: //doi. org / 10.1006 / cres. 1999.0190" title="Cenomanian oyster from the Sergipe Basin, Brazil" type="journal article" year="1999">Seeling &amp; Bengtson (1999)</bibRefCitation>
. In our material we have only one specimen.For this reason we prefer to consider
<emphasis id="B974B56BFA7EFFDD3E7A96BA58B69500" box="[342,450,505,530]" italics="true" pageId="5" pageNumber="218">R. mermeti</emphasis>
as a synonym
<emphasis id="B974B56BFA7EFFDD3D6396BA5A739500" box="[591,775,504,530]" italics="true" pageId="5" pageNumber="218">R. suborbiculatum.</emphasis>
</paragraph>
</subSubSection>
</treatment>
</document>