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<mods:title id="7AA26EBF0EDD1DCB3478E36C894B6EFD">A new Oligocene Ctenodactylinae (Rodentia: Mammalia) from Ulantatal (nei Mongol): new insight on the phylogenetic origins of the modern Ctenodactylidae</mods:title>
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<subSubSection id="C32EFAD97A453D4DFECBFC65FD4AFC42" box="[256,646,981,1002]" pageId="2" pageNumber="533" type="nomenclature">
<paragraph id="8B8BA9527A453D4DFECBFC65FD4AFC42" blockId="2.[256,646,981,1002]" box="[256,646,981,1002]" pageId="2" pageNumber="533">
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<taxonomicName id="4C34D2D17A453D4DFECBFC65FD4AFC42" authority="HINTON, 1933" authorityName="HINTON" authorityYear="1933" box="[256,646,981,1002]" class="Mammalia" family="Ctenodactylidae" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="subFamily" subFamily="Ctenodactylinae">
CTENODACTYLINAE
<bibRefCitation id="EFA5D4A37A453D4DFE29FC65FD4AFC42" author="Hinton MAC" box="[482,646,981,1002]" pageId="2" pageNumber="533" pagination="620 - 622" refId="ref14290" refString="Hinton MAC. 1933. Diagnoses of new Genera and Species of Rodents from the Indian Tertiary deposits. Annales and Magasine of Natural History 10 (12): 620 - 622." type="journal article" year="1933">HINTON, 1933</bibRefCitation>
</taxonomicName>
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<subSubSection id="C32EFAD97A453D4DFF5BFC4CFC05FC45" pageId="2" pageNumber="533" type="materials_examined">
<paragraph id="8B8BA9527A453D4DFF5BFC4CFD99FBB9" blockId="2.[144,597,1019,1041]" box="[144,597,1019,1041]" pageId="2" pageNumber="533">
<emphasis id="B94075407A453D4DFF5BFC4CFED9FBB9" box="[144,277,1020,1041]" italics="true" pageId="2" pageNumber="533">
<typeStatus id="548F17F07A453D4DFF5BFC4CFF08FBB9" box="[144,196,1020,1041]" pageId="2" pageNumber="533">Type</typeStatus>
genus:
</emphasis>
<taxonomicName id="4C34D2D17A453D4DFED4FC4BFD9DFBB9" authority=", Gray, 1828" authorityName=", Gray" authorityYear="1828" box="[287,593,1019,1041]" class="Mammalia" family="Ctenodactylidae" genus="Ctenodactylus" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFED4FC4BFE0AFBB8" box="[287,454,1019,1040]" italics="true" pageId="2" pageNumber="533">Ctenodactylus,</emphasis>
Gray, 1828
</taxonomicName>
.
</paragraph>
<paragraph id="8B8BA9527A453D4DFF5BFB8BFF3AFB04" blockId="2.[144,759,1083,1686]" pageId="2" pageNumber="533">
<emphasis id="B94075407A453D4DFF5BFB8BFE75FBF8" box="[144,441,1083,1105]" italics="true" pageId="2" pageNumber="533">
Included genera:
<taxonomicName id="4C34D2D17A453D4DFE92FB8BFE75FBF8" authorityName="Wood" authorityYear="1937" box="[345,441,1083,1104]" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">Sayimys</taxonomicName>
</emphasis>
,
<taxonomicName id="4C34D2D17A453D4DFE02FB8CFD87FBF9" authorityName="Baskin" authorityYear="1996" box="[457,587,1084,1105]" class="Mammalia" family="Ctenodactylidae" genus="Prosayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFE02FB8CFD87FBF9" box="[457,587,1084,1105]" italics="true" pageId="2" pageNumber="533">Prosayimys</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFD97FB8CFD3CFBF9" authorityName="sensu Schaub" authorityYear="1958" box="[604,752,1084,1105]" class="Mammalia" family="Ctenodactylidae" genus="Metasayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFD97FB8CFD3CFBF9" box="[604,752,1084,1105]" italics="true" pageId="2" pageNumber="533">Metasayimys</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFF5BFBEAFED2FBC7" authorityName="Lavocat" authorityYear="1961" box="[144,286,1114,1135]" class="Mammalia" family="Ctenodactylidae" genus="Africanomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFF5BFBEAFED2FBC7" box="[144,286,1114,1135]" italics="true" pageId="2" pageNumber="533">Africanomys</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFEE6FBE9FE53FBC6" authorityName="de Bruijn &amp; Rumke" authorityYear="1974" box="[301,415,1113,1134]" class="Mammalia" family="Ctenodactylidae" genus="Sardomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEE6FBE9FE53FBC6" box="[301,415,1113,1134]" italics="true" pageId="2" pageNumber="533">Sardomys</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFE66FBE9FDF9FBC6" baseAuthorityName="De Bruijn &amp; Rumke" baseAuthorityYear="1974" box="[429,565,1113,1134]" class="Mammalia" family="Ctenodactylidae" genus="Pireddamys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFE66FBE9FDF9FBC6" box="[429,565,1113,1134]" italics="true" pageId="2" pageNumber="533">Pireddamys</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFD8FFBE9FD65FBC6" authorityName="Jaeger" authorityYear="1971" box="[580,681,1113,1134]" class="Mammalia" family="Ctenodactylidae" genus="Irhoudia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFD8FFBE9FD65FBC6" box="[580,681,1113,1134]" italics="true" pageId="2" pageNumber="533">Irhoudia</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFD73FBE9FF1AFB26" authorityName="Di Gregorio" authorityYear="1925" class="Magnoliopsida" family="Ericaceae" genus="Pellegrinia" kingdom="Plantae" order="Ericales" pageId="2" pageNumber="533" phylum="Tracheophyta" rank="genus">
<emphasis id="B94075407A453D4DFD73FBE9FF1AFB26" italics="true" pageId="2" pageNumber="533">Pellegrinia</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFF2FFBC9FE94FB26" authorityName="Blyth" authorityYear="1885" box="[228,344,1145,1166]" class="Mammalia" family="Ctenodactylidae" genus="Pectinator" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFF2FFBC9FE94FB26" box="[228,344,1145,1166]" italics="true" pageId="2" pageNumber="533">Pectinator</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFEA3FBC9FE3FFB26" authorityName="Lataste" authorityYear="1885" box="[360,499,1145,1166]" class="Mammalia" family="Ctenodactylidae" genus="Massouteria" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEA3FBC9FE3FFB26" box="[360,499,1145,1166]" italics="true" pageId="2" pageNumber="533">Massouteria</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFDC9FBC8FD99FB25" authorityName="Lataste" authorityYear="1886" box="[514,597,1144,1165]" class="Mammalia" family="Ctenodactylidae" genus="Felovia" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFDC9FBC8FD99FB25" box="[514,597,1144,1165]" italics="true" pageId="2" pageNumber="533">Felovia</emphasis>
</taxonomicName>
,
<taxonomicName id="4C34D2D17A453D4DFDAFFBC8FD3AFB25" authority="Vianey-Liaud &amp; Rodrigues &amp; Marivaux, 2010" authorityName="Vianey-Liaud &amp; Rodrigues &amp; Marivaux" authorityYear="2010" box="[612,758,1144,1165]" class="Mammalia" family="Ctenodactylidae" genus="Helanshania" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus" status="gen. nov.">
<emphasis id="B94075407A453D4DFDAFFBC8FD3AFB25" box="[612,758,1144,1165]" italics="true" pageId="2" pageNumber="533">Helanshania</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A273C83B7A453D4DFF5BFB27FF3AFB04" box="[144,246,1175,1196]" pageId="2" pageNumber="533" rank="genus">gen. nov.</taxonomicNameLabel>
</paragraph>
<paragraph id="8B8BA9527A453D4DFF63FB05FE49F93E" blockId="2.[144,759,1083,1686]" pageId="2" pageNumber="533">
The genus
<taxonomicName id="4C34D2D17A453D4DFEE3FB06FE79FB63" authorityName="Robinson &amp; Black" authorityYear="1973" box="[296,437,1206,1227]" class="Mammalia" family="Ctenodactylidae" genus="Testouromys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEE3FB06FE79FB63" box="[296,437,1206,1227]" italics="true" pageId="2" pageNumber="533">Testouromys</emphasis>
</taxonomicName>
was erected by
<bibRefCitation id="EFA5D4A37A453D4DFDBAFB05FED3FB42" author="Robinson P &amp; Black CC" pageId="2" pageNumber="533" pagination="319 - 332" refId="ref14950" refString="Robinson P, Black CC. 1974. Vertebrate faunas from the Neogene of Tunisia. Annals of the Geological Survey of Egypt IV: 319 - 332." type="journal article" year="1974">Robinson &amp; Black (1974)</bibRefCitation>
for one complete m3, one broken m1, and one eroded M1, from a Tunisian Miocene locality (Testour). The m3 has a pattern close to that of some species of
<taxonomicName id="4C34D2D17A453D4DFEC1FA80FEA6FAED" authorityName="Wood" authorityYear="1937" box="[266,362,1328,1349]" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEC1FA80FEA6FAED" box="[266,362,1328,1349]" italics="true" pageId="2" pageNumber="533">Sayimys</emphasis>
</taxonomicName>
, with open
<collectionCode id="ED2531977A453D4DFDDFFA80FDEAFAED" box="[532,550,1328,1349]" country="Canada" lsid="urn:lsid:biocol.org:col:13946" name="Royal British Columbia Museum - Herbarium" pageId="2" pageNumber="533" type="Museum">V</collectionCode>
shaped mesosynclinid and metasynclinid, like in
<taxonomicName id="4C34D2D17A453D4DFDF9FAFFFDD4FA2B" authority="(Lopez-Antonanza &amp; Sen, 2004)" baseAuthorityName="Lopez-Antonanza &amp; Sen" baseAuthorityYear="2004" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="species" species="baskini">
<emphasis id="B94075407A453D4DFDF9FAFFFD3BFACB" box="[562,759,1358,1380]" italics="true" pageId="2" pageNumber="533">Sayimys baskini</emphasis>
(
<bibRefCitation id="EFA5D4A37A453D4DFF5CFADDFDDDFA2B" author="Lopez-Antonanza R &amp; Sen S" box="[151,529,1389,1411]" pageId="2" pageNumber="533" pagination="1477 - 1494" refId="ref14689" refString="Lopez-Antonanza R, Sen S. 2004. Ctenodactylids from the lower and middle Miocene of Saudi Arabia. Paleontology 47: 1477 - 1494." type="journal article" year="2004">López-Antoñanza &amp; Sen, 2004</bibRefCitation>
)
</taxonomicName>
. For that reason,
<taxonomicName id="4C34D2D17A453D4DFF5BFA3CFED1FA09" authorityName="Robinson &amp; Black" authorityYear="1973" box="[144,285,1420,1441]" class="Mammalia" family="Ctenodactylidae" genus="Testouromys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFF5BFA3CFED1FA09" box="[144,285,1420,1441]" italics="true" pageId="2" pageNumber="533">Testouromys</emphasis>
</taxonomicName>
could be synonymized with
<taxonomicName id="4C34D2D17A453D4DFD44FA3CFD23FA09" authorityName="Wood" authorityYear="1937" box="[655,751,1420,1441]" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFD44FA3CFD23FA09" box="[655,751,1420,1441]" italics="true" pageId="2" pageNumber="533">Sayimys</emphasis>
</taxonomicName>
.
<emphasis id="B94075407A453D4DFF5BFA1AFEEEFA17" box="[144,290,1450,1471]" italics="true" pageId="2" pageNumber="533">
<taxonomicName id="4C34D2D17A453D4DFF5BFA1AFED3FA17" authorityName="Shevyreva" authorityYear="1994" box="[144,287,1450,1471]" class="Mammalia" family="Ctenodactylidae" genus="Akzharomys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">Akzharomys</taxonomicName>
,
</emphasis>
erected by
<bibRefCitation id="EFA5D4A37A453D4DFE68FA1AFDA5FA68" author="Shevyreva N" box="[419,617,1450,1472]" pageId="2" pageNumber="533" pagination="126 - 131" refId="ref15119" refString="Shevyreva N. 1994. A new neogene Ctenodactyloidea (Rodentia, Mammalia) from the Zaisan depression (Eastern Kazakhstan). Paleontologicheskii Zhurnal 28: 126 - 131." type="journal article" year="1994">Shevyreva (1994)</bibRefCitation>
on the basis of a few teeth from the lower Miocene Akhzarian Formation, has not been further used. From its trilobate pattern, the lack of a trigonoid structure on the m3, and the M2 with a sinus relatively longer than in molars of
<taxonomicName id="4C34D2D17A453D4DFEDDF9F3FE64F9F0" authorityName="Vianey-Liaud &amp; Rodrigues &amp; Marivaux" authorityYear="2010" box="[278,424,1603,1624]" class="Mammalia" family="Ctenodactylidae" genus="Helanshania" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEDDF9F3FE64F9F0" box="[278,424,1603,1624]" italics="true" pageId="2" pageNumber="533">Helanshania</emphasis>
</taxonomicName>
or
<taxonomicName id="4C34D2D17A453D4DFE28F9F4FDA9F9F1" authorityName="Baskin" authorityYear="1996" box="[483,613,1604,1625]" class="Mammalia" family="Ctenodactylidae" genus="Prosayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFE28F9F4FDA9F9F1" box="[483,613,1604,1625]" italics="true" pageId="2" pageNumber="533">Prosayimys</emphasis>
</taxonomicName>
, as in the species of
<taxonomicName id="4C34D2D17A453D4DFEC4F9D2FEA3F9DF" authorityName="Wood" authorityYear="1937" box="[271,367,1634,1655]" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFEC4F9D2FEA3F9DF" box="[271,367,1634,1655]" italics="true" pageId="2" pageNumber="533">Sayimys</emphasis>
</taxonomicName>
, this genus is possibly a junior synonym of
<taxonomicName id="4C34D2D17A453D4DFED5F931FEB2F93E" authorityName="Wood" authorityYear="1937" box="[286,382,1665,1686]" class="Mammalia" family="Ctenodactylidae" genus="Sayimys" higherTaxonomySource="GBIF" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="genus">
<emphasis id="B94075407A453D4DFED5F931FEB2F93E" box="[286,382,1665,1686]" italics="true" pageId="2" pageNumber="533">Sayimys</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="8B8BA9527A453D4DFF5BF970FA84FF52" blockId="2.[144,759,1728,1903]" lastBlockId="2.[806,1421,198,250]" pageId="2" pageNumber="533">
<emphasis id="B94075407A453D4DFF5BF970FD74F97D" box="[144,696,1728,1749]" italics="true" pageId="2" pageNumber="533">Geological range and geographical distribution:</emphasis>
Late early to early late Oligocene in Central Asia (
<collectingRegion id="49F067B07A453D4DFD7CF96FFF31F8BB" country="China" name="Nei Mongol" pageId="2" pageNumber="533">Inner Mongolia</collectingRegion>
), from early to late Miocene (North
<collectingCountry id="F323E9C27A453D4DFD61F94DFD3EF8BB" box="[682,754,1789,1811]" name="China" pageId="2" pageNumber="533">China</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFF5BF8ACFF30F89A" box="[144,252,1820,1842]" name="Mongolia" pageId="2" pageNumber="533">Mongolia</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFED7F8ACFE64F89A" box="[284,424,1820,1842]" name="Kazakhstan" pageId="2" pageNumber="533">Kazakhstan</collectingCountry>
, North
<collectingCountry id="F323E9C27A453D4DFDE1F8ACFDA5F89A" box="[554,617,1820,1842]" name="India" pageId="2" pageNumber="533">India</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFD42F8ACFD3EF89A" box="[649,754,1820,1842]" name="Pakistan" pageId="2" pageNumber="533">Pakistan</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFF5BF88AFF2DF8E7" box="[144,225,1850,1871]" name="Greece" pageId="2" pageNumber="533">Greece</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFF33F88AFE85F8F8" box="[248,329,1850,1872]" name="Turkey" pageId="2" pageNumber="533">Turkey</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFEABF88AFE6FF8F8" box="[352,419,1850,1872]" name="Libya" pageId="2" pageNumber="533">Libya</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFE70F88BFDD7F8F8" box="[443,539,1851,1872]" name="Morocco" pageId="2" pageNumber="533">Morocco</collectingCountry>
, Sardinia), Pleistocene (Sicily), Recent (arid zones of North Africa, from
<collectingCountry id="F323E9C27A453D4DFCACFF76FC08FF73" box="[871,964,198,219]" name="Morocco" pageId="2" pageNumber="533">Morocco</collectingCountry>
to
<collectingCountry id="F323E9C27A453D4DFC3BFF76FBFFFF74" box="[1008,1075,198,220]" name="Libya" pageId="2" pageNumber="533">Libya</collectingCountry>
, Saharan Africa from
<collectingCountry id="F323E9C27A453D4DFAF5FF76FCA8FF52" name="Mauritania" pageId="2" pageNumber="533">Mauritania</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFCBAFF54FC0BFF52" box="[881,967,228,250]" name="Algeria" pageId="2" pageNumber="533">Algeria</collectingCountry>
,
<collectingCountry id="F323E9C27A453D4DFC1EFF54FBDEFF52" box="[981,1042,228,250]" name="Chad" pageId="2" pageNumber="533">Chad</collectingCountry>
to
<collectingCountry id="F323E9C27A453D4DFBF7FF54FB52FF52" box="[1084,1182,228,250]" name="Ethiopia" pageId="2" pageNumber="533">Ethiopia</collectingCountry>
and
<collectingCountry id="F323E9C27A453D4DFB17FF54FAF0FF52" box="[1244,1340,228,250]" name="Somalia" pageId="2" pageNumber="533">Somalia</collectingCountry>
).
</paragraph>
<paragraph id="8B8BA9527A453D4DFCEDFEA7FB42FE84" blockId="2.[806,1421,279,1005]" box="[806,1166,279,300]" pageId="2" pageNumber="533">
<emphasis id="B94075407A453D4DFCEDFEA7FB42FE84" box="[806,1166,279,300]" italics="true" pageId="2" pageNumber="533">Emended differential diagnosis</emphasis>
</paragraph>
<paragraph id="8B8BA9527A453D4DFCEDFE86FAF9FEE4" blockId="2.[806,1421,279,1005]" box="[806,1333,310,332]" pageId="2" pageNumber="533">
<taxonomicName id="4C34D2D17A453D4DFCEDFE86FC13FEE4" authorityName="HINTON" authorityYear="1933" box="[806,991,310,332]" class="Mammalia" family="Ctenodactylidae" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="subFamily" subFamily="Ctenodactylinae">Ctenodactylinae</taxonomicName>
differ from
<taxonomicName id="4C34D2D17A453D4DFBA4FE86FAC2FEE4" box="[1135,1294,310,332]" class="Mammalia" family="Ctenodactylidae" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="subFamily" subFamily="Tataromyinae">Tataromyinae</taxonomicName>
in:
</paragraph>
<paragraph id="8B8BA9527A453D4DFCF4FEE4FB78FD89" blockId="2.[806,1421,279,1005]" pageId="2" pageNumber="533">Skull and mandible: reduction of the temporal masticatory apparatus, which includes a small temporal fossa and a weak temporal crest, low condyle and low to absent coronoid process; sciurognathous mandible showing a great development of the masseter -pterygoid masticatory apparatus, with a single horizontal heavy masseteric crest.</paragraph>
<paragraph id="8B8BA9527A453D4DFCF4FD9BFC25FD13" blockId="2.[806,1421,279,1005]" pageId="2" pageNumber="533">
Cheek teeth: reduction of the premolars (in size and eventually in number) compared to the
<taxonomicName id="4C34D2D17A453D4DFB2CFDF9FA45FDF7" box="[1255,1417,585,607]" class="Mammalia" family="Ctenodactylidae" kingdom="Animalia" order="Rodentia" pageId="2" pageNumber="533" phylum="Chordata" rank="subFamily" subFamily="Tataromyinae">Tataromyinae</taxonomicName>
; dental formula 1/1, 2-1/1-0, 3/3. DP4/dp4 may be retained a more or less long time; then P4/p4 may be lost early in life.
</paragraph>
<paragraph id="8B8BA9527A453D4DFCF4FD74FB08FCBF" blockId="2.[806,1421,279,1005]" pageId="2" pageNumber="533">Cheek teeth from unilaterally hypsodont to hypsodont; cementum occasionally filling the sinus (sinusid) and synclines (synclinids).</paragraph>
<paragraph id="8B8BA9527A453D4DFCF4FCAFFC05FC45" blockId="2.[806,1421,279,1005]" pageId="2" pageNumber="533">Entolophid displaced forward, to the middle of the lower molars; possible reduction of the mesosynclinid; anterocone absent on the upper cheek teeth; hypocone as strong as the protocone; reduction of the anterior and posterior synclines on the upper molars; tendency to produce a bilobate pattern, first on upper, then on lower, molars.</paragraph>
</subSubSection>
</treatment>
</document>