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<document ID-DOI="10.1206/0003-0090.457.1.1" ID-ISSN="0003-0090" ID-Zenodo-Dep="6971356" approvalRequired="59" approvalRequired_for_taxonomicNames="59" checkinTime="1659882917898" checkinUser="felipe" docAuthor="Beck, Robin M. D., Voss, Robert S. &amp; Jansa, Sharon A." docDate="2022" docId="03EFDD5DF779696BDB05FC8A1EE2FEDC" docLanguage="en" docName="BulAmeMusNatHist.2022.457.1-350.pdf" docOrigin="Bulletin of the American Museum of Natural History 2022 (457)" docSource="https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-457/issue-1/0003-0090.457.1.1/Craniodental-Morphology-and-Phylogeny-of-Marsupials/10.1206/0003-0090.457.1.1.full" docStyle="DocumentStyle:915933466F796C9C739DF4DB6B8DCFA6.7:BulAmeMusNatHis.2011-.journal_article.1cover.type1" docStyleId="915933466F796C9C739DF4DB6B8DCFA6" docStyleName="BulAmeMusNatHis.2011-.journal_article.1cover.type1" docStyleVersion="7" docTitle="Microbiotherium tehuelchum Ameghino 1887" docType="treatment" docVersion="7" lastPageNumber="322" masterDocId="FFD6A525F63B6829DA0BFFAE1A62FFC7" masterDocTitle="Craniodental Morphology And Phylogeny Of Marsupials" masterLastPageNumber="353" masterPageNumber="1" pageNumber="322" updateTime="1661891901480" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title>Craniodental Morphology And Phylogeny Of Marsupials</mods:title>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Beck, Robin M. D.</mods:namePart>
<mods:affiliation>School of Science, Engineering and Environment University of Salford, U. K. &amp; School of Biological, Earth &amp; Environmental Sciences University of New South Wales, Australia &amp; Division of Vertebrate Zoology (Mammalogy) American Museum of Natural History</mods:affiliation>
</mods:name>
<mods:name type="personal">
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Voss, Robert S.</mods:namePart>
<mods:affiliation>Division of Vertebrate Zoology (Mammalogy) American Museum of Natural History</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Jansa, Sharon A.</mods:namePart>
<mods:affiliation>Bell Museum and Department of Ecology, Evolution, and Behavior University of Minnesota</mods:affiliation>
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<mods:title>Bulletin of the American Museum of Natural History</mods:title>
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<mods:part>
<mods:date>2022</mods:date>
<mods:detail type="pubDate">
<mods:number>2022-06-28</mods:number>
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<mods:detail type="volume">
<mods:number>2022</mods:number>
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<mods:detail type="issue">
<mods:number>457</mods:number>
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<mods:end>353</mods:end>
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<mods:url>https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-457/issue-1/0003-0090.457.1.1/Craniodental-Morphology-and-Phylogeny-of-Marsupials/10.1206/0003-0090.457.1.1.full</mods:url>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.1206/0003-0090.457.1.1</mods:identifier>
<mods:identifier type="ISSN">0003-0090</mods:identifier>
<mods:identifier type="Zenodo-Dep">6971356</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.6974452" ID-Zenodo-Dep="6974452" LSID="urn:lsid:plazi:treatment:03EFDD5DF779696BDB05FC8A1EE2FEDC" httpUri="http://treatment.plazi.org/id/03EFDD5DF779696BDB05FC8A1EE2FEDC" lastPageNumber="322" pageId="322" pageNumber="322">
<subSubSection box="[270,474,804,828]" pageId="322" pageNumber="322" type="multiple">
<paragraph blockId="322.[270,474,804,828]" box="[270,474,804,828]" pageId="322" pageNumber="322">
<heading box="[270,474,804,828]" centered="true" fontSize="10" level="2" pageId="322" pageNumber="322" reason="4">
<taxonomicName box="[283,474,804,828]" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="undetermined">
<emphasis bold="true" box="[283,474,804,828]" italics="true" pageId="322" pageNumber="322">Microbiotherium</emphasis>
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection pageId="322" pageNumber="322" type="nomenclature">
<paragraph blockId="322.[108,637,854,1738]" pageId="322" pageNumber="322">
SPECIES SCORED: †
<emphasis italics="true" pageId="322" pageNumber="322">
<taxonomicName authorityName="Ameghino" authorityYear="1887" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="tehuelchum">Microbiotherium tehuelchum</taxonomicName>
.
</emphasis>
</paragraph>
</subSubSection>
<subSubSection pageId="322" pageNumber="322" type="materials_examined">
<paragraph blockId="322.[108,637,854,1738]" pageId="322" pageNumber="322">
GEOLOGICAL PROVENANCE OF SCORED
<collectionCode box="[108,167,953,977]" pageId="322" pageNumber="322">SPECIMENS</collectionCode>
: Santa Cruz Formation,
<collectingRegion country="Argentina" name="Santa Cruz" pageId="322" pageNumber="322">Santa Cruz Province</collectingRegion>
,
<collectingCountry box="[167,280,986,1010]" name="Argentina" pageId="322" pageNumber="322">Argentina</collectingCountry>
.
</paragraph>
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<subSubSection pageId="322" pageNumber="322" type="description">
<paragraph blockId="322.[108,637,854,1738]" pageId="322" pageNumber="322">
AGE OF SCORED SPECIMENS: The
<collectingRegion box="[514,636,1019,1043]" country="Bolivia" name="Santa Cruz" pageId="322" pageNumber="322">Santa Cruz</collectingRegion>
Formation spans a maximum of 1419 Mya (see account for †
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[253,385,1085,1109]" class="Mammalia" family="Caenolestidae" genus="Stilotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Paucituberculata" pageId="322" pageNumber="322" phylum="Chordata" rank="genus">
<emphasis box="[253,385,1085,1109]" italics="true" pageId="322" pageNumber="322">Stilotherium</emphasis>
</taxonomicName>
, above).
</paragraph>
<paragraph blockId="322.[108,637,854,1738]" box="[140,621,1119,1143]" pageId="322" pageNumber="322">
ASSIGNED AGE
<collectionCode box="[311,388,1119,1143]" pageId="322" pageNumber="322">RANGE</collectionCode>
:
<geoCoordinate box="[402,474,1119,1143]" degrees="19.000" direction="north" orientation="latitude" pageId="322" pageNumber="322" precision="55" value="19.0">19.000</geoCoordinate>
<geoCoordinate box="[473,559,1119,1143]" degrees="14.000" direction="west" orientation="longitude" pageId="322" pageNumber="322" precision="55" value="-14.0">14.000</geoCoordinate>
Mya.
</paragraph>
</subSubSection>
<subSubSection pageId="322" pageNumber="322" type="discussion">
<paragraph blockId="322.[108,637,854,1738]" lastBlockId="322.[684,1213,226,283]" pageId="322" pageNumber="322">
REMARKS: †
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[281,606,1151,1175]" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="tehuelchum">
<emphasis box="[281,606,1151,1175]" italics="true" pageId="322" pageNumber="322">Microbiotherium tehuelchum</emphasis>
</taxonomicName>
is the only fossil microbiotheriid currently known from anything other than isolated dental remains (Segall, 1969; Marshall, 1982). Of particular importance is a partial auditory region (PU 15038) that exhibits a number of distinctive cranial features that are seen only in
<taxonomicName authorityName="Thomas" authorityYear="1894" box="[512,636,1351,1374]" class="Mammalia" family="Microbiotheriidae" genus="Dromiciops" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="genus">
<emphasis box="[512,636,1351,1374]" italics="true" pageId="322" pageNumber="322">Dromiciops</emphasis>
</taxonomicName>
among living marsupials (Segall, 1969). We scored our †
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[262,448,1416,1440]" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="genus">
<emphasis box="[262,448,1416,1440]" italics="true" pageId="322" pageNumber="322">Microbiotherium</emphasis>
</taxonomicName>
terminal based solely on specimens of †
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[374,534,1449,1473]" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="tehuelchum">
<emphasis box="[374,534,1449,1473]" italics="true" pageId="322" pageNumber="322">M. tehuelchum</emphasis>
</taxonomicName>
from the Santa Cruz Formation (Segall, 1969; Marshall, 1982). However, material from the?middle Miocene (Friasian
<collectionCode box="[272,364,1548,1572]" pageId="322" pageNumber="322">SALMA</collectionCode>
) Río Frias Formation in
<collectingCountry box="[108,167,1581,1605]" name="Chile" pageId="322" pageNumber="322">Chile</collectingCountry>
(Marshall, 1990) and the early Miocene Pinturas Formation in
<collectingCountry box="[382,494,1614,1638]" name="Argentina" pageId="322" pageNumber="322">Argentina</collectingCountry>
(Bown and Fleagle, 1994; Chornogubsky and Kramarz, 2012) has also been referred to †
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[469,630,1680,1704]" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="tehuelchum">
<emphasis box="[469,630,1680,1704]" italics="true" pageId="322" pageNumber="322">M. tehuelchum</emphasis>
</taxonomicName>
. Goin and Abello (2013) presented a phylogenetic analysis of
<taxonomicName authorityName="Ameghino" authorityYear="1887" box="[822,1029,226,250]" class="Mammalia" family="Microbiotheriidae" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="family">Microbiotheriidae</taxonomicName>
, including †
<taxonomicName authorityName="Ameghino" authorityYear="1887" class="Mammalia" family="Microbiotheriidae" genus="Microbiotherium" higherTaxonomySource="GBIF" kingdom="Animalia" order="Microbiotheria" pageId="322" pageNumber="322" phylum="Chordata" rank="species" species="tehuelchum">
<emphasis italics="true" pageId="322" pageNumber="322">M. tehuelchum</emphasis>
</taxonomicName>
, based on 20 dental characters.
</paragraph>
</subSubSection>
</treatment>
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