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<mods:title id="815FB1E92A2E4FA850A60C04E229B084">Systematics of the genus Palaeictops Matthew, 1899 (Mammalia: Leptictidae), with the description of two new species from the Middle Eocene of Utah and Wyoming</mods:title>
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<paragraph id="8B90368DFB079C7BFE6E36338B41FDEE" blockId="3.[482,861,600,626]" box="[482,861,600,626]" pageId="3" pageNumber="4">
Subfamily
<taxonomicName id="4C2F4D0EFB079C7BFDEC36338B41FDEE" authority="Gill, 1872" authorityName="Gill" authorityYear="1872" box="[608,861,600,626]" class="Mammalia" family="Leptictidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptictida" pageId="3" pageNumber="4" phylum="Chordata" rank="subFamily" subFamily="Leptictinae">
Leptictinae
<bibRefCitation id="EFBE4B7CFB079C7BFD6736338B41FDEE" author="Gill, T." box="[747,861,600,626]" pageId="3" pageNumber="4" pagination="1 - 98" refId="ref13945" refString="Gill, T. 1872. Arrangement of the families of mammals with analytical tables. Smithsonian Miscellaneous Collections 11: 1 - 98." type="journal article" year="1872">Gill, 1872</bibRefCitation>
</taxonomicName>
</paragraph>
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<paragraph id="8B90368DFB079C7BFF2436FD8A6BFC40" blockId="3.[120,1226,662,1251]" pageId="3" pageNumber="4">
EMENDED DIAGNOSIS: Leptictids with large, distinct hypocones on P5 (vestigial or absent in nonleptictines). Anteroposteriorly more elongated P5 and upper molars with lower paracones, protocones, and metacones (taller cusps in nonleptictines). Upper molars with slightly more labially situated conules, absence of a twinned paraconule, and variably developed ectoflexi, but less deeply infolded than in nonleptictines. Upper molar parastylar spurs poorly developed. Elongated p5, with large, projecting paraconid. Skeletons (known in
<taxonomicName id="4C2F4D0EFB079C7BFB93373988A4FC0D" baseAuthorityName="Leidy" baseAuthorityYear="1868" class="Mammalia" family="Leptictidae" genus="Leptictis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="species" species="dakotensis">
<emphasis id="B95BEA9FFB079C7BFB93373988A4FC0D" italics="true" pageId="3" pageNumber="4">Leptictis dakotensis</emphasis>
</taxonomicName>
and
<taxonomicName id="4C2F4D0EFB079C7BFF7D371C89F9FC0D" authorityName="Novacek" authorityYear="1977" box="[241,485,887,913]" class="Mammalia" family="Leptictidae" genus="Palaeictops" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="species" species="matthewi">
<emphasis id="B95BEA9FFB079C7BFF7D371C89F9FC0D" box="[241,485,887,913]" italics="true" pageId="3" pageNumber="4">Palaeictops matthewi</emphasis>
</taxonomicName>
) with distinct distal fusion of tibia and fibula, head of humerus semilunar with sharply defined medial border, head of femur strongly canted to long axis of shaft, and deep trochanteric fossa of femur.
</paragraph>
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<paragraph id="8B90368DFB079C7BFF2437838B37FBBB" blockId="3.[120,1226,662,1251]" pageId="3" pageNumber="4">
INCLUDED TAXA:
<taxonomicName id="4C2F4D0EFB079C7BFEFB37838B3AFB9E" authority="Meehan and Martin, 2010" authorityName="Meehan and Martin" authorityYear="2010" box="[375,806,1000,1026]" class="Mammalia" family="Leptictidae" genus="Blacktops" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="genus">
<emphasis id="B95BEA9FFB079C7BFEFB378389F8FB9E" box="[375,484,1000,1026]" italics="true" pageId="3" pageNumber="4">Blacktops</emphasis>
<bibRefCitation id="EFBE4B7CFB079C7BFE6137838B3AFB9E" author="Meehan, T. J. &amp; L. D. Martin" box="[493,806,1000,1026]" pageId="3" pageNumber="4" pagination="99 - 107" refId="ref15064" refString="Meehan, T. J., and L. D. Martin. 2010. New leptictids (Mammalia: Insectivora) from the Early Oligocene of Nebraska, USA. Neues Jahrbuch fur Geologie und Palaontologie-Abhandlungen 256: 99 - 107." type="journal article" year="2010">Meehan and Martin, 2010</bibRefCitation>
</taxonomicName>
;
<taxonomicName id="4C2F4D0EFB079C7BFCB937838C39FB9E" authority="Leidy, 1868" authorityName="Leidy" authorityYear="1868" box="[821,1061,1000,1026]" class="Mammalia" family="Leptictidae" genus="Leptictis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="genus">
<emphasis id="B95BEA9FFB079C7BFCB937838B89FB9D" box="[821,917,1000,1025]" italics="true" pageId="3" pageNumber="4">Leptictis</emphasis>
<bibRefCitation id="EFBE4B7CFB079C7BFC1037838C39FB9E" author="Leidy, J." box="[924,1061,1000,1026]" pageId="3" pageNumber="4" pagination="315 - 316" refId="ref14472" refString="Leidy, J. 1868. Notice of some remains of extinct Insectivora from Dakota. Proceedings of the Academy of Natural Sciences of Philadelphia 1868: 315 - 316." type="journal article" year="1868">Leidy, 1868</bibRefCitation>
</taxonomicName>
;
<taxonomicName id="4C2F4D0EFB079C7BFBB8378389B3FBBB" authority="Meehan and Martin, 2012" authorityName="Meehan and Martin" authorityYear="2012" class="Mammalia" family="Leptictidae" genus="Megaleptictis" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="genus">
<emphasis id="B95BEA9FFB079C7BFBB837838CD6FB9E" box="[1076,1226,1000,1026]" italics="true" pageId="3" pageNumber="4">Megaleptictis</emphasis>
<bibRefCitation id="EFBE4B7CFB079C7BFFF4306689B3FBBB" author="Meehan, T. J. &amp; L. D. Martin" box="[120,431,1037,1063]" pageId="3" pageNumber="4" pagination="509 - 518" refId="ref15108" refString="Meehan, T. J., and L. D. Martin. 2012. New large leptictid insectivore from the Late Paleogene of South Dakota, USA. Acta Palaeontologica Polonica 57: 509 - 518." type="journal article" year="2012">Meehan and Martin, 2012</bibRefCitation>
</taxonomicName>
; and
<taxonomicName id="4C2F4D0EFB079C7BFE7C30668B3AFBBB" authority="Matthew, 1899" authorityName="Matthew" authorityYear="1899" box="[496,806,1037,1063]" class="Mammalia" family="Leptictidae" genus="Palaeictops" higherTaxonomySource="GBIF" kingdom="Animalia" order="Pilosa" pageId="3" pageNumber="4" phylum="Chordata" rank="genus">
<emphasis id="B95BEA9FFB079C7BFE7C30668A6CFBBB" box="[496,624,1037,1063]" italics="true" pageId="3" pageNumber="4">Palaeictops</emphasis>
<bibRefCitation id="EFBE4B7CFB079C7BFDFB30668B3AFBBB" author="Matthew, W. D." box="[631,806,1037,1063]" pageId="3" pageNumber="4" pagination="19 - 75" refId="ref14602" refString="Matthew, W. D. 1899. A provisional classification of the fresh-water Tertiary of the West. Bulletin of the American Museum of Natural History 12 (3): 19 - 75." type="journal article" year="1899">Matthew, 1899</bibRefCitation>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="C3356506FB079C7BFF24305888F8FBEE" pageId="3" pageNumber="4" type="distribution">
<paragraph id="8B90368DFB079C7BFF24305888F8FBEE" blockId="3.[120,1226,662,1251]" pageId="3" pageNumber="4">DISTRIBUTION: Early Eocene (Wasatchian)Late Oligocene (Whitneyan), North America.</paragraph>
</subSubSection>
<subSubSection id="C3356506FB079C7BFF2430158C22FB7F" pageId="3" pageNumber="4" type="discussion">
<paragraph id="8B90368DFB079C7BFF2430158C22FB7F" blockId="3.[120,1226,662,1251]" pageId="3" pageNumber="4">
REMARKS: Postcranial evidence offers compelling evidence for the monophyly of
<taxonomicName id="4C2F4D0EFB079C7BFBE8301588B8FB22" authorityName="Gill" authorityYear="1872" class="Mammalia" family="Leptictidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Leptictida" pageId="3" pageNumber="4" phylum="Chordata" rank="subFamily" subFamily="Leptictinae">Leptictinae</taxonomicName>
. Unfortunately, only two species in this group are represented by skeletal material. For the present, the dental features alone must serve to group all species of the subfamily.
</paragraph>
</subSubSection>
</treatment>
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