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<document ID-CLB-Dataset="297059" ID-DOI="10.5281/zenodo.7316535" ID-GBIF-Dataset="bb605a32-1722-403b-9e46-bac664e1a8e5" ID-ISBN="0-8018-8221-4" checkinTime="1670905143547" checkinUser="guido" docAuthor="Wilson, Don E. &amp; Reeder, DeeAnn" docDate="2005" docId="019D9C9468A621739E0051FAB5237573" docLanguage="en" docName="MammalSpeciesofTheWorld.2005.Cricetidae.955-1189.xml" docOrigin="Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press" docTitle="Sigmodon Say and Ord 1825" docType="treatment" docVersion="4" id="05F3D1847A4743C70A50558FE6B48509" lastPageNumber="1173" masterDocId="05F3D1847A4743C70A50558FE6B48509" masterDocTitle="Order Rodentia - Family Cricetidae" masterLastPageNumber="1189" masterPageNumber="955" pageNumber="1173" updateTime="1716773916032" updateUser="ExternalLinkService">
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<mods:title id="236141A0026B74AE663121797D115835">Order Rodentia - Family Cricetidae</mods:title>
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<mods:title id="77B49E1C738C84D89E91166E9675ABF6">Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2</mods:title>
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<treatment id="019D9C9468A621739E0051FAB5237573" ID-GBIF-Taxon="231523049" LSID="urn:lsid:plazi:treatment:019D9C9468A621739E0051FAB5237573" httpUri="http://treatment.plazi.org/id/019D9C9468A621739E0051FAB5237573" lastPageNumber="1173" pageNumber="1173" sourceUrl="http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=13000909">
<subSubSection id="A261701F845D673B983CA03AC00A927E" pageNumber="1173" type="nomenclature">
<paragraph id="74D2D1A4487A81A9ABCB9E42E0BFD046" pageNumber="1173">
<taxonomicName id="D0D99662C69D2A0F142636C8E3DFB1C9" ID-CoL="7GSM" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="genus">
<emphasis id="6123DB5698C959C920CEA28541B96085" italics="true" pageNumber="1173">Sigmodon</emphasis>
Say and Ord 1825
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="70D9382AEE6B3B460A5F9EBE2C839B4B" pageNumber="1173" type="reference_group">
<paragraph id="7BBCDBAA2A277BBCCF52F22A313FC184" pageNumber="1173">
<treatmentCitation id="B105E6B291705C66CDFE0D9E971C2E9A" author="Say and Ord" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" issue="2" journal="J. Acad. Nat. Sci. Philadelphia" kingdom="Animalia" order="Rodentia" page="352" pageNumber="1173" phylum="Chordata" rank="genus" title="Sigmodon" volume="4" year="1825">
<taxonomicName id="AAAB088BC16D9A8E071726A8E6E3FE08" ID-CoL="7GSM" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="genus">
<emphasis id="AD1B5B9B3F4296029E15A642A0EEAAF5" italics="true" pageNumber="1173">Sigmodon</emphasis>
Say and Ord 1825
</taxonomicName>
,
<bibCitation id="7575151DDE0210BF7D86BE587E3037A0" author="Say and Ord" issue="2" journal="J. Acad. Nat. Sci. Philadelphia" pageNumber="1173" pagination="352" title="Sigmodon" volume="4" year="1825">
J. Acad. Nat. Sci.
<collectingRegion id="5E867F284EB7E9C66F4540612E8C65DB" country="Jordan" name="'Amman">Philadelphia</collectingRegion>
, 4 (2): 352
</bibCitation>
</treatmentCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="5AC70FA2AE5575EC27DEDBEA0BC7892A" pageNumber="1173" type="type_taxon">
<paragraph id="B936CA3187CFC7BA39E1E6D151D70018" pageNumber="1173">
<emphasis id="EADEA06489A5AC0C7C83010680C04A06" inLineHeading="true" pageNumber="1173">Type Species:</emphasis>
<taxonomicName id="60CB9633AA03595FA6F032D4CF4BF471" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="hispidus">
<emphasis id="8255A3940445C063570CD66BAFF37C5B" italics="true" pageNumber="1173">Sigmodon hispidus</emphasis>
Say and Ord 1825
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="6EC5BE8178F1F9245E273FD50D76A57F" pageNumber="1173" type="synonym_list">
<paragraph id="6283F227B7DC841701D79DC505519B5E" pageNumber="1173">
<emphasis id="5CF83D163B231B75F1A9948DB4CC3DD2" inLineHeading="true" pageNumber="1173">Synonyms:</emphasis>
<taxonomicName id="BBBDBCFE3B32B85A48BA0D07610A9C37" authority="Saussure 1860" authorityName="Saussure" authorityYear="1860" class="Mammalia" family="Cricetidae" genus="Deilemys" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="genus">
<emphasis id="60439EC7CB299480BA6B75AA957F6D81" italics="true" pageNumber="1173">Deilemys</emphasis>
Saussure 1860
</taxonomicName>
;
<taxonomicName id="AE9A88FCB9F2164D56903E459CBA66A3" authority="Burmeister 1854" authorityName="Burmeister" authorityYear="1854" class="Mammalia" family="Cricetidae" genus="Lasiomys" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="genus">
<emphasis id="0B728949DB181B7FCB8C5915B8B18AF1" italics="true" pageNumber="1173">Lasiomys</emphasis>
Burmeister 1854
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="2A84C975000AB0D37A9B4D8FED28E979" pageNumber="1173" type="child_taxa">
<paragraph id="0D2B3AF51FED8AFB303B67F725BABB00" pageNumber="1173">
<emphasis id="FD54A80BBB633A5938CC1AA2ACE6C088" inLineHeading="true" pageNumber="1173">Species and subspecies:</emphasis>
14 species in 2 subgenera:
</paragraph>
<paragraph id="563D2F971960BC9D5E639B777483EBB8" pageNumber="1173">
Subgenus
<taxonomicName id="D86DFF0181F8FBC41C9224E62BA59C46" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="subGenus" subGenus="Sigmodon">
<emphasis id="B0B0E0B9C2232F8EE24FB81EEA882EE0" italics="true" pageNumber="1173">Sigmodon (Sigmodon)</emphasis>
Say and Ord 1825
</taxonomicName>
</paragraph>
<paragraph id="5B8F3619AD9F223E40FE8E60BBBED21B" pageNumber="1173">
Subgenus
<taxonomicName id="7ADCDB7C87E5B4B33CAC410019530B32" authority="Thomas 1901" authorityName="Thomas" authorityYear="1901" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="subGenus" subGenus="Sigmomys">
<emphasis id="B72F0E0AA69D5D40DEC89ACF69BC723E" italics="true" pageNumber="1173">Sigmodon (Sigmomys)</emphasis>
Thomas 1901
</taxonomicName>
</paragraph>
<paragraph id="A7CDFD27377D29C1A9BC9B850669CC60" pageNumber="1173">
Species
<taxonomicName id="40342B747670DDCB724FC5903418DEC1" authority="Bailey 1902" authorityName="Bailey" authorityYear="1902" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="alleni" subGenus="Sigmodon">
<emphasis id="C50DB70C9BFF9C41110A4D00C8EF6D7B" italics="true" pageNumber="1173">Sigmodon (Sigmodon) alleni</emphasis>
<bibRefCitation id="7A190F5B92067DAD557DFD1506BB1CF0" author="Bailey, V. E." refId="ref17609" refString="Bailey, V. E. 1902. Synopsis of the North American species of Sigmodon. Proceedings of the Biological Society of Washington, 15: 101 - 116." year="1902">Bailey 1902</bibRefCitation>
</taxonomicName>
</paragraph>
<paragraph id="6762D91AB0C2946B1321544CBEBAF4E2" pageNumber="1173">
Species
<taxonomicName id="9B129095962BB967839D23D95C697A59" authority="Thomas 1880" authorityName="Thomas" authorityYear="1880" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="alstoni" subGenus="Sigmomys">
<emphasis id="D0855FEE935416D3733CDAE1382E9EA6" italics="true" pageNumber="1173">Sigmodon (Sigmomys) alstoni</emphasis>
Thomas 1880
</taxonomicName>
</paragraph>
<paragraph id="14C5BB60E4F9778A67F32EA263A895F6" pageNumber="1173">
Species
<taxonomicName id="C25E747441C8E54DB9B8ADC880F40A2C" authority="Mearns 1890" authorityName="Mearns" authorityYear="1890" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="arizonae" subGenus="Sigmodon">
<emphasis id="A91B003D2FC2D72832FEBE7C9C034A1E" italics="true" pageNumber="1173">Sigmodon (Sigmodon) arizonae</emphasis>
Mearns 1890
</taxonomicName>
</paragraph>
<paragraph id="0A08216DF3FD6E24861E689A3344B188" pageNumber="1173">
Species
<taxonomicName id="4C460A7B42F437C7FE1C7B6D03C53DF0" authority="J. A. Allen 1889" authorityName="J. A. Allen" authorityYear="1889" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="fulviventer" subGenus="Sigmodon">
<emphasis id="B1C8D416CE838CEC33EC972C2AAE353C" italics="true" pageNumber="1173">Sigmodon (Sigmodon) fulviventer</emphasis>
J. A. Allen 1889
</taxonomicName>
</paragraph>
<paragraph id="DAD6A2FFDE918EA66396A78918DF49CF" pageNumber="1173">
Species
<taxonomicName id="3367C32216441FBAC74376D1CAF04B01" authority="Burmeister 1854" authorityName="Burmeister" authorityYear="1854" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="hirsutus" subGenus="Sigmodon">
<emphasis id="8144912D764E3254EA1AB4461CDAE2EE" italics="true" pageNumber="1173">Sigmodon (Sigmodon) hirsutus</emphasis>
Burmeister 1854
</taxonomicName>
</paragraph>
<paragraph id="1CC9344D71781EB31595621544D30B41" pageNumber="1173">
Species
<taxonomicName id="A168BE5ABEB3E0D252FDD0A94D8EE476" authority="Say and Ord 1825" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="hispidus" subGenus="Sigmodon">
<emphasis id="9C0553A60C23966EB28139DFF90835E2" italics="true" pageNumber="1173">Sigmodon (Sigmodon) hispidus</emphasis>
Say and Ord 1825
</taxonomicName>
</paragraph>
<paragraph id="7C7BA3E875C9C4AA76E78BD24A06D123" pageNumber="1173">
Species
<taxonomicName id="3298DE6583B869DA492F27BB84025107" authority="Anthony 1924" authorityName="Anthony" authorityYear="1924" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="inopinatus" subGenus="Sigmodon">
<emphasis id="43B35A17CDBC67B0DB6A5DDC87690521" italics="true" pageNumber="1173">Sigmodon (Sigmodon) inopinatus</emphasis>
<bibRefCitation id="05B040A93FAB1FE3A141D41D9D08318E" author="Anthony, H. E." refId="ref11568" refString="Anthony, H. E. 1924. Preliminary report on Ecuadorean mammals. No. 6. American Museum Novitates, 139: 1 - 9." year="1924">Anthony 1924</bibRefCitation>
</taxonomicName>
</paragraph>
<paragraph id="8DC5C758B776F38F7E1F586EAB7F0F43" pageNumber="1173">
Species
<taxonomicName id="866F576BAEF050DAC5EC5C02C0D527EC" authority="Bailey 1902" authorityName="Bailey" authorityYear="1902" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="leucotis" subGenus="Sigmodon">
<emphasis id="7807E343CC0E27017354EAC199E3912A" italics="true" pageNumber="1173">Sigmodon (Sigmodon) leucotis</emphasis>
<bibRefCitation id="B9BF0A741E5291E5EA36F99D330D58F1" author="Bailey, V. E." refId="ref17609" refString="Bailey, V. E. 1902. Synopsis of the North American species of Sigmodon. Proceedings of the Biological Society of Washington, 15: 101 - 116." year="1902">Bailey 1902</bibRefCitation>
</taxonomicName>
</paragraph>
<paragraph id="ADFE2CD3352E836080E343876AA174D8" pageNumber="1173">
Species
<taxonomicName id="D8EFFB9720E7B5A3F61E5DCD1DA186F4" authority="J. A. Allen 1897" authorityName="J. A. Allen" authorityYear="1897" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="mascotensis" subGenus="Sigmodon">
<emphasis id="BD753355F28C70C9B0EBDCE78A61E105" italics="true" pageNumber="1173">Sigmodon (Sigmodon) mascotensis</emphasis>
J. A. Allen 1897
</taxonomicName>
</paragraph>
<paragraph id="8F320386A720D50BA5ACD9B064DC1D85" pageNumber="1173">
Species
<taxonomicName id="11460E805E7768C6E629486D55CCC588" authority="Bailey 1902" authorityName="Bailey" authorityYear="1902" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="ochrognathus" subGenus="Sigmodon">
<emphasis id="0E1BF1AA123646AE5B058E049FC6DFCF" italics="true" pageNumber="1173">Sigmodon (Sigmodon) ochrognathus</emphasis>
<bibRefCitation id="BE7D7F451A6BCF95CE67272E556AD9A9" author="Bailey, V. E." refId="ref17609" refString="Bailey, V. E. 1902. Synopsis of the North American species of Sigmodon. Proceedings of the Biological Society of Washington, 15: 101 - 116." year="1902">Bailey 1902</bibRefCitation>
</taxonomicName>
</paragraph>
<paragraph id="9BAA3F507C56868DA1AC063C25FB5EF9" pageNumber="1173">
Species
<taxonomicName id="2A441E2D8AC7BA2FDE3CBF3B9F27C168" authority="J. A. Allen 1897" authorityName="J. A. Allen" authorityYear="1897" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="peruanus" subGenus="Sigmodon">
<emphasis id="81AEB38169937A1003BB7A3D70139CB2" italics="true" pageNumber="1173">Sigmodon (Sigmodon) peruanus</emphasis>
J. A. Allen 1897
</taxonomicName>
</paragraph>
<paragraph id="513AC7F7788698EF94B6E8CD424FB2B4" pageNumber="1173">
Species
<taxonomicName id="196C3B019BECBFEAAC4CD2FD4E97E338" authority="Nelson and Goldman 1933" authorityName="Nelson and Goldman" authorityYear="1933" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="planifrons" subGenus="Sigmodon">
<emphasis id="B986A3133D19047B2E0E3929D49C5063" italics="true" pageNumber="1173">Sigmodon (Sigmodon) planifrons</emphasis>
Nelson and Goldman 1933
</taxonomicName>
</paragraph>
<paragraph id="FC1FC71B3EB1FF2561536CCA526264E2" pageNumber="1173">
Species
<taxonomicName id="61BAEB4EFAA6BAB687DEACFADD5FE241" authority="Saussure 1860" authorityName="Saussure" authorityYear="1860" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="toltecus" subGenus="Sigmodon">
<emphasis id="F5F7C5E545B6008891BACC6F1B5CC475" italics="true" pageNumber="1173">Sigmodon (Sigmodon) toltecus</emphasis>
Saussure 1860
</taxonomicName>
</paragraph>
<paragraph id="D981E38F4EEEDA0843680C3847F5925A" pageNumber="1173">
Species
<taxonomicName id="4F6E6266A7C87B75D012DC3E31C91FFB" authority="Goodwin 1932" authorityName="Goodwin" authorityYear="1932" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" pageNumber="1173" phylum="Chordata" rank="species" species="zanjonensis" subGenus="Sigmodon">
<emphasis id="EA8D706D057412F6A526E4FDCEC36A39" italics="true" pageNumber="1173">Sigmodon (Sigmodon) zanjonensis</emphasis>
Goodwin 1932
</taxonomicName>
</paragraph>
</subSubSection>
<subSubSection id="A1C66BC350172AF3A4114E910A6C9926" pageNumber="1173" type="discussion">
<paragraph id="0DDEFE11B3D32B509BBB933D74B56544" pageNumber="1173">
<emphasis id="EEE4F840746168EF618236EDB392D7ED" inLineHeading="true" pageNumber="1173">Discussion:</emphasis>
<paragraph id="CB501C6DE86683AF3D9EB39916FE7039" pageNumber="1173">
<taxonomicName id="3B7149112B145ABF8F60974664903DDA" authorityName="Hershkovitz" authorityYear="1966" rank="tribe" tribe="Sigmodontini">Sigmodontini</taxonomicName>
.
<bibRefCitation id="26193FFAC65E3FB53B6DA53D50321B98" author="Hershkovitz, P." refId="ref148901" refString="Hershkovitz, P. 1955 a. South American marsh rats, genus Holochilus, with a summary of sigmodont rodents. Fieldiana: Zoology, 37: 639 - 687." year="1955">
Hershkovitz (1955
<emphasis id="05E69442C6D873C2EA24ACE4252175A2" italics="true" pageNumber="1173">a</emphasis>
)
</bibRefCitation>
arranged
<taxonomicName id="404175752D64A8AD363CE12B1211F2AD" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="0A2FB171F244FDB9D99663A47A998473" italics="true" pageNumber="1173">Sigmodon</emphasis>
</taxonomicName>
with
<taxonomicName id="9430C1261657B0AFA6C9B9350DF76D14" authorityName="Brandt" authorityYear="1835" class="Mammalia" family="Cricetidae" genus="Holochilus" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="7E6A53A8EA152FBE8ED2D1564736641F" italics="true" pageNumber="1173">Holochilus</emphasis>
</taxonomicName>
,
<taxonomicName id="B7A270DDD61C0559F8882A4871210F2F" authorityName="Thomas" authorityYear="1894" class="Mammalia" family="Cricetidae" genus="Neotomys" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="B1F992BB2C379FB95CB50AD1B59560CF" italics="true" pageNumber="1173">Neotomys</emphasis>
</taxonomicName>
, and
<taxonomicName id="8EC52E097701BD2F8EEBE60B06183A73" authorityName="Waterhouse" authorityYear="1837" class="Mammalia" family="Cricetidae" genus="Reithrodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="8FA9B6DEFBC59F59B7CB68BD1A7272DA" italics="true" pageNumber="1173">Reithrodon</emphasis>
</taxonomicName>
as the sigmodont group, but other evidence has eroded the tribal-level affinity of each to
<taxonomicName id="57A5CDEFDD48B5C85746737B20AA21D0" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="335C1C2B3396803D60CC7B95DE9D77DA" italics="true" pageNumber="1173">Sigmodon</emphasis>
</taxonomicName>
(see those generic accounts) and leaves the genus as the sole living tribal member. Cladistic isolation from other sigmodontine genera, typically as a basal lineage, affirmed in broad taxonomic surveys of phallic morphology (
<bibRefCitation id="0852765641FAD843F7184FE79E8242CD" author="Hooper, E. T. &amp; G. G. Musser" refId="ref158728" refString="Hooper, E. T., and G. G. Musser. 1964 a. The glans penis in Neotropical cricetines (Family Muridae) with comments on classification of muroid rodents. Miscellaneous Publications, Museum of Zoology, University of Michigan, 123: 1 - 57." year="1964">
Hooper and Musser, 1964
<emphasis id="E2F359CD05D64FB712CE004AB4E9A2A4" italics="true" pageNumber="1173">a</emphasis>
</bibRefCitation>
) and mitochondrial genes (DElía et al., 2003;
<bibRefCitation id="303215B185BA97485D84CAA93D894FBD" author="Engel, S. R. &amp; K. M. Hogan &amp; J. F. Taylor &amp; S. K. Davis" refId="ref95361" refString="Engel, S. R., K. M. Hogan, J. F. Taylor, and S. K. Davis. 1998. Molecular systematics and paleobiogeography of the South American sigmodontine rodents. Molecular Biology and Evolution, 15: 35 - 49." year="1998">Engel et al., 1998</bibRefCitation>
;
<bibRefCitation id="F580F0FDC2BEAC5EB53FFAB6801C6AC8" author="Smith, M. F. &amp; J. L. Patton" refId="ref331392" refString="Smith, M. F., and J. L. Patton. 1999. Phylogenetic relationships and the radiation of sigmodontine rodents in South America: Evidence from cytochrome b. Journal of Mammalian Evolution, 6: 89 - 128." year="1999">Smith and Patton, 1999</bibRefCitation>
). Ambiguous evidence for geographic origin, North versus South America, discussed by
<bibRefCitation id="38BFD51CB4829DBE0E9173D5A0896A2C" author="Voss, R. S." refId="ref378350" refString="Voss, R. S. 1992. A revision of the South American species of Sigmodon (Mammalia: Muridae) with notes on their natural history and biogeography. American Museum Novitates, 3050: 1 - 56." year="1992">Voss (1992)</bibRefCitation>
and
<bibRefCitation id="152C41865EE64A577CF4D0E63C0F22D6" author="Peppers, L. L. &amp; D. S. Carroll &amp; R. D. Bradley" refId="ref279872" refString="Peppers, L. L., D. S. Carroll, and R. D. Bradley. 2002. Molecular systematics of the genus Sigmodon (Rodentia: Muridae): Evidence from the mitochondrial cytochrome b gene. Journal of Mammalogy, 83: 396 - 407." year="2002">Peppers et al. (2002)</bibRefCitation>
.
</paragraph>
<paragraph id="927CE87ECC0526D80C6BE1BED38C1058" pageNumber="1173">
<taxonomicName id="E21977247F28D11F0BA3BB42FFE6FD5B" authorityName="Thomas" authorityYear="1901" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="subGenus" subGenus="Sigmomys">
<emphasis id="4BFD8F4E550748D5BF3AD2B696B12239" italics="true" pageNumber="1173">Sigmomys</emphasis>
</taxonomicName>
, type species
<taxonomicName id="29EC171C170BF07E6B5EF79384AEBF99" authorityName="Thomas" authorityYear="1880" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="alstoni">
<emphasis id="CB7810CB7118CEE92D6332FD283DD522" italics="true" pageNumber="1173">Sigmodon alstoni</emphasis>
</taxonomicName>
, has been variously treated as a distinct genus (
<bibRefCitation id="B18A36714066868163DB945D9CABBB36" author="Ellerman, J. R." refId="ref92857" refString="Ellerman, J. R. 1941. The families and genera of living rodents. Vol. II. Family Muridae. British Museum (Natural History), London, 690 pp." year="1941">Ellerman, 1941</bibRefCitation>
;
<bibRefCitation id="DA88484B432BED56F9FA212EAA105121" author="Gyldenstolpe, N." refId="ref135911" refString="Gyldenstolpe, N. 1932. A manual of Neotropical sigmodont rodents. Kungliga Svenska Vetenskapsakademiens Handlingar, Tredje Serien, 11: 1 - 164." year="1932">Gyldenstolpe, 1932</bibRefCitation>
;
<bibRefCitation id="FFBD999D49B8A4FB17DB6A9ECD345110" author="Handley, C. O., Jr." refId="ref139161" refString="Handley, C. O., Jr. 1976. Mammals of the Smithsonian Venezuelan Project. Brigham Young University Science Bulletin, Biological Series, 20: 1 - 91." year="1976">Handley, 1976</bibRefCitation>
), a subgenus of
<taxonomicName id="BC008CB160BBDEB38CE5CAA1CA1D466B" authority="(Husson, 1978)" baseAuthorityName="Husson" baseAuthorityYear="1978" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="genus">
<emphasis id="5FE3EE03D5DD8E3B012FC1C78719D0A7" italics="true" pageNumber="1173">Sigmodon</emphasis>
(
<bibRefCitation id="10118FE78594FC3F8F26280A50962D58" author="Husson, A. M." refId="ref162053" refString="Husson, A. M. 1978. The mammals of Suriname. E. J. Brill, Leiden, 569 pp., 160 pls." year="1978">Husson, 1978</bibRefCitation>
)
</taxonomicName>
, or a full synonym (Cabrera, 1961;
<bibRefCitation id="77734C1F3AB397BAD696D29609FF3C65" author="Hershkovitz, P." refId="ref148901" refString="Hershkovitz, P. 1955 a. South American marsh rats, genus Holochilus, with a summary of sigmodont rodents. Fieldiana: Zoology, 37: 639 - 687." year="1955">
Hershkovitz, 1955
<emphasis id="AA3D9801D6D9397F36CC16A48E695152" italics="true" pageNumber="1173">a</emphasis>
</bibRefCitation>
;
<bibRefCitation id="D9A3EB330CD221D851820DD4DB242F33" author="Voss, R. S." refId="ref378350" refString="Voss, R. S. 1992. A revision of the South American species of Sigmodon (Mammalia: Muridae) with notes on their natural history and biogeography. American Museum Novitates, 3050: 1 - 56." year="1992">Voss, 1992</bibRefCitation>
).
<bibRefCitation id="0E2DF64AB615A6A6A63873B23C90DA43" author="Peppers, L. L. &amp; D. S. Carroll &amp; R. D. Bradley" refId="ref279872" refString="Peppers, L. L., D. S. Carroll, and R. D. Bradley. 2002. Molecular systematics of the genus Sigmodon (Rodentia: Muridae): Evidence from the mitochondrial cytochrome b gene. Journal of Mammalogy, 83: 396 - 407." year="2002">Peppers et al. (2002)</bibRefCitation>
discussed the possible recognition of
<taxonomicName id="A0A3D13B6C99342C56977E860FE1AF68" authorityName="Thomas" authorityYear="1880" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="alstoni">
<emphasis id="23FF13B0D9007D4944BAF9836B876282" italics="true" pageNumber="1173">alstoni</emphasis>
</taxonomicName>
within a monotypic genus, subgenus, or simply species group; in view of its morphological distinctiveness (
<bibRefCitation id="91DAF59FD09261400A90BB2F34A53CB4" author="Voss, R. S." refId="ref378350" refString="Voss, R. S. 1992. A revision of the South American species of Sigmodon (Mammalia: Muridae) with notes on their natural history and biogeography. American Museum Novitates, 3050: 1 - 56." year="1992">Voss, 1992</bibRefCitation>
) and cladistic dichotomy relative to all other
<taxonomicName id="850EA422CD962B5051F33B935498E3A3">
<emphasis id="6E90E754DA36FB510B8C799947BA15C9" italics="true" pageNumber="1173">Sigmodon</emphasis>
species
</taxonomicName>
(
<bibRefCitation id="1A37CC272EABC62A2A75D8B0D2B9CA5A" author="Peppers, L. L. &amp; D. S. Carroll &amp; R. D. Bradley" refId="ref279872" refString="Peppers, L. L., D. S. Carroll, and R. D. Bradley. 2002. Molecular systematics of the genus Sigmodon (Rodentia: Muridae): Evidence from the mitochondrial cytochrome b gene. Journal of Mammalogy, 83: 396 - 407." year="2002">Peppers et al., 2002</bibRefCitation>
), the formal rank of subgenus seems appropriate.
</paragraph>
<paragraph id="4D7523FDDFF1961A79FB1226C8EF86F5" pageNumber="1173">
North American forms revised by
<bibRefCitation id="37FA5D7018550309504C05EB8481FEE8" author="Bailey, V. E." refId="ref17609" refString="Bailey, V. E. 1902. Synopsis of the North American species of Sigmodon. Proceedings of the Biological Society of Washington, 15: 101 - 116." year="1902">Bailey (1902)</bibRefCitation>
, with subsequent partial revisions by
<bibRefCitation id="FD580252A5B30176C37096C46262298A" author="Baker, R. H." refId="ref18116" refString="Baker, R. H. 1969. Cotton rats of the Sigmodon fulviventer group. Miscellaneous Publications, Museum of Natural History, University of Kansas, 51: 177 - 232." year="1969">Baker (1969)</bibRefCitation>
,
<bibRefCitation id="6DA47C7459A537E4E5351F9DDD573186" author="Zimmerman, E. G." refId="ref408162" refString="Zimmerman, E. G. 1970. Karyology, systematics and chromosomal evolution in the rodent genus, Sigmodon. Publications of The Museum, Michigan State University, Biological Series, 4: 385 - 454." year="1970">Zimmerman (1970)</bibRefCitation>
,
<bibRefCitation id="13C26BC0112838D67121B8E40F76CDC5" author="Voss, R. S." refId="ref378350" refString="Voss, R. S. 1992. A revision of the South American species of Sigmodon (Mammalia: Muridae) with notes on their natural history and biogeography. American Museum Novitates, 3050: 1 - 56." year="1992">Voss (1992)</bibRefCitation>
, Carleton et al. (1999), and
<bibRefCitation id="7D45C42956B6FDDE69541AEC4E5B4A55" author="Peppers, L. L. &amp; R. D. Bradley" refId="ref279767" refString="Peppers, L. L., and R. D. Bradley. 2000. Molecular systematics of the genus Sigmodon. Journal of Mammalogy, 81: 332 - 343." year="2000">Peppers and Bradley (2000)</bibRefCitation>
; further alpha-taxonomic study dearly needed. Standard karyology summarized by
<bibRefCitation id="2249C2585E651539A5529C9248581572" author="Zimmerman, E. G." refId="ref408162" refString="Zimmerman, E. G. 1970. Karyology, systematics and chromosomal evolution in the rodent genus, Sigmodon. Publications of The Museum, Michigan State University, Biological Series, 4: 385 - 454." year="1970">Zimmerman (1970)</bibRefCitation>
and Carleton et al. (1999); banded karyotypes by
<bibRefCitation id="AEC87596A9FBB11E65D0EB5C920F731A" author="Elder, F. B." refId="ref92520" refString="Elder, F. B. 1980. Tandem fusion, centric fusion, and chromosomal evolution in the cotton rats, genus Sigmodon. Cytogenetics and Cell Genetics, 26: 199 - 210." year="1980">Elder (1980)</bibRefCitation>
and
<bibRefCitation id="0C1EC323CE9D11D0F8880D0D87592361" author="Elder, F. B. &amp; M. R. Lee" refId="ref92556" refString="Elder, F. B., and M. R. Lee. 1985. The chromosomes of Sigmodon ochrognathus and S. fulviventer suggest a realignment of Sigmodon species groups. Journal of Mammalogy, 66: 511 - 518." year="1985">Elder and Lee (1985)</bibRefCitation>
; albumin differentiation by
<bibRefCitation id="A6074151261D6A457DE1C339BCB66F06" author="Fuller, F. &amp; M. R. Lee &amp; L. R. Maxson" refId="ref110314" refString="Fuller, F., M. R. Lee, and L. R. Maxson. 1984. Albumin evolution in Peromyscus and Sigmodon. Journal of Mammalogy, 65: 466 - 473." year="1984">Fuller et al. (1984)</bibRefCitation>
; and mitochondrial DNA variation by
<bibRefCitation id="54EB558C3A24D611B316E00DF1EE25FB" author="Peppers, L. L. &amp; R. D. Bradley" refId="ref279767" refString="Peppers, L. L., and R. D. Bradley. 2000. Molecular systematics of the genus Sigmodon. Journal of Mammalogy, 81: 332 - 343." year="2000">Peppers and Bradley (2000)</bibRefCitation>
and
<bibRefCitation id="65153768D2BF04926501C68B1F1D9923" author="Peppers, L. L. &amp; D. S. Carroll &amp; R. D. Bradley" refId="ref279872" refString="Peppers, L. L., D. S. Carroll, and R. D. Bradley. 2002. Molecular systematics of the genus Sigmodon (Rodentia: Muridae): Evidence from the mitochondrial cytochrome b gene. Journal of Mammalogy, 83: 396 - 407." year="2002">Peppers et al. (2002)</bibRefCitation>
. Skin-and-skull morphology (
<bibRefCitation id="AD12D68A2604EB8EFC4CCB2AFD37DC29" author="Baker, R. H." refId="ref18116" refString="Baker, R. H. 1969. Cotton rats of the Sigmodon fulviventer group. Miscellaneous Publications, Museum of Natural History, University of Kansas, 51: 177 - 232." year="1969">Baker, 1969</bibRefCitation>
;
<bibRefCitation id="FC876DCEF8CE35326B4FE09B73F5545F" author="Bailey, V. E." refId="ref17609" refString="Bailey, V. E. 1902. Synopsis of the North American species of Sigmodon. Proceedings of the Biological Society of Washington, 15: 101 - 116." year="1902">Bailey, 1902</bibRefCitation>
), karyology (
<bibRefCitation id="B9D2A7986E7E37A8FA998AB450F805CF" author="Elder, F. B. &amp; M. R. Lee" refId="ref92556" refString="Elder, F. B., and M. R. Lee. 1985. The chromosomes of Sigmodon ochrognathus and S. fulviventer suggest a realignment of Sigmodon species groups. Journal of Mammalogy, 66: 511 - 518." year="1985">Elder and Lee, 1985</bibRefCitation>
;
<bibRefCitation id="5ABC8EF41138FAD0442F43F209C0E238" author="Zimmerman, E. G." refId="ref408162" refString="Zimmerman, E. G. 1970. Karyology, systematics and chromosomal evolution in the rodent genus, Sigmodon. Publications of The Museum, Michigan State University, Biological Series, 4: 385 - 454." year="1970">Zimmerman, 1970</bibRefCitation>
), and molecular data (
<bibRefCitation id="E78C687441A61384D9DBAC4AA6B65F72" author="Peppers, L. L. &amp; D. S. Carroll &amp; R. D. Bradley" refId="ref279872" refString="Peppers, L. L., D. S. Carroll, and R. D. Bradley. 2002. Molecular systematics of the genus Sigmodon (Rodentia: Muridae): Evidence from the mitochondrial cytochrome b gene. Journal of Mammalogy, 83: 396 - 407." year="2002">Peppers et al., 2002</bibRefCitation>
) have yielded conflicting pictures of species-group associations. Species groups observed here follow the last study, which broadly treats most species under the revised understanding of
<taxonomicName id="14BDAB1913D4825E9C5933BFC8018C41" authorityName="Say and Ord" authorityYear="1825" class="Mammalia" family="Cricetidae" genus="Sigmodon" kingdom="Animalia" order="Rodentia" phylum="Chordata" rank="species" species="hispidus">S. hispidus</taxonomicName>
</paragraph>
.
</paragraph>
</subSubSection>
</treatment>
</document>