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<document id="058823F56BDB74704AD812A20B507DAE" ID-CLB-Dataset="61364" ID-DOI="10.5281/zenodo.6588177" ID-GBIF-Dataset="e3c7ddc9-124f-4f96-9adb-e2bb222f3210" ID-ISBN="978-84-941892-3-4" ID-Zenodo-Dep="6588177" IM.illustrations_requiresApprovalFor="plazi" IM.metadata_requiresApprovalFor="plazi" IM.taxonomicNames_requiresApprovalFor="plazi" checkinTime="1653672804429" checkinUser="carolina" docAuthor="Don E. Wilson, Thomas E. Lacher, Jr &amp; Russell A. Mittermeier" docDate="2016" docId="59304B441B13FFDFFA28FDA1F681F622" docLanguage="en" docName="hbmw_6_Ctenomyidae_0498.pdf.imf" docOrigin="Handbook of the Mammals of the World Volume 6 Lagomorphs and Rodents I, Barcelona: Lynx Edicions" docTitle="Ctenomys rionegrensis Langguth &amp; Abella 1970" docType="treatment" docVersion="11" lastPageNumber="524" masterDocId="A509333C1B1EFFD2FF94FC71FF90FFDC" masterDocTitle="Ctenomyidae" masterLastPageNumber="534" masterPageNumber="498" pageNumber="524" updateTime="1699338135220" updateUser="ExternalLinkService">
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<mods:title id="55620FAD93FB0EF2E3FD0F597C471145">Ctenomyidae</mods:title>
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<mods:namePart id="B2BA1E0F355F9CC089A4188C7EFF74C5">Don E. Wilson</mods:namePart>
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<mods:namePart id="E2D94FCB85C98C88490153269341E308">Thomas E. Lacher, Jr</mods:namePart>
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<mods:namePart id="0C07924EC4C4C8B9027FDDF0E2389017">Russell A. Mittermeier</mods:namePart>
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<mods:title id="51D1F7F2B2687D6A191A87CD616C1C54">Handbook of the Mammals of the World Volume 6 Lagomorphs and Rodents I</mods:title>
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<subSubSection id="9983A9D91B13FFDFFA28FDA1FA65FE22" box="[1468,1525,464,510]" pageId="13" pageNumber="524" type="multiple">
<paragraph id="D126FA521B13FFDFFA28FDA1FA65FE22" blockId="13.[1465,2474,464,553]" box="[1468,1525,464,510]" pageId="13" pageNumber="524">
<heading id="8A6E4D3E1B13FFDFFA28FDA1FA65FE22" box="[1468,1525,464,510]" pageId="13" pageNumber="524">
<figureCitation id="49A2E6D71B13FFDFFA28FDA1FA65FE22" box="[1468,1525,464,510]" captionStart="Plate 31: Ctenomyidae" captionStartId="10.[162,192,3321,3346]" captionTargetBox="[13,2790,14,3643]" captionTargetPageId="9" captionText="23. DOrbignys Tuco-tuco (Ctenomys dorbignyi), 24. Ibicui Tuco-tuco (Ctenomys ibicuiensis), 25. Lami Tuco-tuco (Ctenomys lami), 26. Minute Tuco-tuco (Clenomys minutus), 27. Pearsons Tuco-tuco (Ctenomys pearsoni), 28. Perrenss Tuco-tuco (Ctenomys perrensi), 29. Roigs Tuco-tuco (Ctenomys roigi), 30. Collared Tuco-tuco (Ctenomys torquatus), 31. Pundts Tuco-tuco (Clenomys pundit), 32. Talas Tuco-tuco (Ctenomys talarum), 33. Flamarions Tuco-tuco (Ctenomys flamarioni), 34. Mendoza Tuco-tuco (Ctenomys mendocinus), 35. Cinnamon Tuco-tuco (Clenomys porteousi), 36. Rio Negro Tuco-tuco (Ctenomys rionegrensis), 37. Dune Tuco-tuco (Ctenomys australis), 38. White-bellied Tuco-tuco (Clenomys colburni), 39. Coyhaique Tuco-tuco (Cienomys coyhaiquensis), 40. Lago Blanco Tuco-tuco (Ctenomys fodax), 41. Patagonian Tuco-tuco (Ctenomys haigi), 42. Magellanic Tuco-tuco (Ctenomys magellanicus), 43. Silky Tuco-tuco (Ctenomys sericeus)" figureDoi="http://doi.org/10.5281/zenodo.6588332" httpUri="https://zenodo.org/record/6588332/files/figure.png" pageId="13" pageNumber="524">36.</figureCitation>
</heading>
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<subSubSection id="9983A9D91B13FFDFF991FDA1F829FE22" box="[1541,1977,464,510]" pageId="13" pageNumber="524" type="vernacular_names">
<paragraph id="D126FA521B13FFDFF991FDA1F829FE22" blockId="13.[1465,2474,464,553]" box="[1541,1977,464,510]" pageId="13" pageNumber="524">
<heading id="8A6E4D3E1B13FFDFF991FDA1F829FE22" box="[1541,1977,464,510]" pageId="13" pageNumber="524">
<vernacularName id="5F9A8A7C1B13FFDFF991FDA1F829FE22" box="[1541,1977,464,510]" pageId="13" pageNumber="524">Rio Negro Tuco-tuco</vernacularName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFF790FDA1F614FE22" box="[2052,2436,464,510]" pageId="13" pageNumber="524" type="nomenclature">
<paragraph id="D126FA521B13FFDFF790FDA1F614FE22" blockId="13.[1465,2474,464,553]" box="[2052,2436,464,510]" pageId="13" pageNumber="524">
<heading id="8A6E4D3E1B13FFDFF790FDA1F614FE22" box="[2052,2436,464,510]" pageId="13" pageNumber="524">
<taxonomicName id="169981D11B13FFDFF790FDA1F614FE22" ID-CoL="3265X" authorityName="Langguth &amp; Abella" authorityYear="1970" box="[2052,2436,464,510]" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="rionegrensis">
<emphasis id="E3ED26401B13FFDFF790FDA1F614FE22" box="[2052,2436,464,510]" italics="true" pageId="13" pageNumber="524">Ctenomys rionegrensis</emphasis>
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA2FFE61F639FDF9" box="[1467,2473,528,549]" pageId="13" pageNumber="524" type="vernacular_names">
<paragraph id="D126FA521B13FFDFFA2FFE61F639FDF9" blockId="13.[1465,2474,464,553]" box="[1467,2473,528,549]" pageId="13" pageNumber="524">
<heading id="8A6E4D3E1B13FFDFFA2FFE61F639FDF9" box="[1467,2473,528,549]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA2FFE61F996FDF9" bold="true" box="[1467,1542,528,549]" pageId="13" pageNumber="524">French:</emphasis>
<vernacularName id="5F9A8A7C1B13FFDFF99FFE61F966FDF9" box="[1547,1782,528,549]" pageId="13" pageNumber="524">Tuco-tuco du Rio Negro</vernacularName>
/
<emphasis id="E3ED26401B13FFDFF89FFE61F8F6FDF9" bold="true" box="[1803,1894,528,549]" pageId="13" pageNumber="524">German:</emphasis>
<vernacularName id="5F9A8A7C1B13FFDFF8E4FE61F7D8FDF9" box="[1904,2120,528,549]" pageId="13" pageNumber="524">Rio-Negro-Kammratte</vernacularName>
/
<emphasis id="E3ED26401B13FFDFF7C9FE61F728FDF9" bold="true" box="[2141,2232,528,549]" pageId="13" pageNumber="524">Spanish:</emphasis>
<vernacularName id="5F9A8A7C1B13FFDFF72AFE61F639FDF9" box="[2238,2473,528,549]" pageId="13" pageNumber="524">Tuco tuco de Rio Negro</vernacularName>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFF789FE29F69BFD40" pageId="13" pageNumber="524" type="reference_group">
<paragraph id="D126FA521B13FFDFF789FE29F69BFD40" blockId="13.[2076,2672,600,1022]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFF789FE29F728FDA9" bold="true" box="[2077,2232,600,629]" pageId="13" pageNumber="524">Taxonomy.</emphasis>
<taxonomicName id="169981D11B13FFDFF75DFE29F696FD40" ID-CoL="3265X" authorityName="Langguth &amp; Abella" authorityYear="1970" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="rionegrensis">Ctenomys rionegrensis Langguth &amp; Abella, 1970</taxonomicName>
,
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFF6B7FEF2F599FCCE" pageId="13" pageNumber="524" type="materials_examined">
<paragraph id="D126FA521B13FFDFF6B7FEF2F599FCCE" blockId="13.[2076,2672,600,1022]" pageId="13" pageNumber="524">
<materialsCitation id="61F1F00F1B13FFDFF6B7FEF2F599FCCE" ID-GBIF-Occurrence="3798388348" pageId="13" pageNumber="524">“Balneario Las Canas, boca del Arroyo Las Canas, 7 km al Sudoeste de Fray Bentos, Rio Negro, Uruguay,” c. 100 m, 33°06 S, 58°20 W.</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFF7B4FF69F9C8FB1D" pageId="13" pageNumber="524" type="discussion">
<paragraph id="D126FA521B13FFDFF7B4FF69F9C8FB1D" blockId="13.[2076,2672,600,1022]" lastBlockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<taxonomicName id="169981D11B13FFDFF7B4FF69F6AAFCE5" authorityName="Langguth &amp; Abella" authorityYear="1970" box="[2080,2362,792,825]" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="rionegrensis">Ctenomys rionegrensis</taxonomicName>
was first classified in the Eastern group based on biogeography, and based on mtDNA, it was classified in the mendocinusspecies group. It was initially considered a subspecies of C.
<taxonomicName id="169981D11B13FFDFF7D9FFACF729FC22" authorityName="Nehring" authorityYear="1887" box="[2125,2233,989,1022]" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="minutus">minutus</taxonomicName>
. Its karyotype was described as 2n = b0, but there is chromosomal variation from 40 to 56 that includes species from Argentine and Uruguay. Morphometric variation was studied in
<taxonomicName id="169981D11B13FFDFF625F85AF5FEFB90" authorityName="Langguth &amp; Abella" authorityYear="1970" box="[2481,2670,1067,1100]" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="rionegrensis">C. rionegrensis</taxonomicName>
in relation to geographical distribution, and no correlation between geographical and morphological distances was found. Sperm morphology is simple asymmetric. Monotypic.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA2CF8B8F9D7FACC" pageId="13" pageNumber="524" type="distribution">
<caption id="85E6AADA1B13FFDFFA2CF8B8F9D7FACC" ID-DOI="http://doi.org/10.5281/zenodo.6588258" ID-Zenodo-Dep="6588258" httpUri="https://zenodo.org/record/6588258/files/figure.png" inLine="true" pageId="13" pageNumber="524" targetBox="[1463,2053,600,1013]" targetPageId="13">
<paragraph id="D126FA521B13FFDFFA2CF8B8F9D7FACC" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA2CF8B8F9F7FB36" bold="true" box="[1464,1639,1225,1258]" pageId="13" pageNumber="524">Distribution.</emphasis>
SW Uruguay (Rio Negro Department) and NE Argentina (Entre Rios Province).
</paragraph>
</caption>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA23F96DF932F883" pageId="13" pageNumber="524" type="description">
<paragraph id="D126FA521B13FFDFFA23F96DF932F883" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA23F96DF92AFAE5" bold="true" box="[1463,1722,1308,1337]" pageId="13" pageNumber="524">Descriptive notes.</emphasis>
Head-body 178-190 mm (males) and 162-190 mm (females), tail 71-83 mm (males) and 65-83 mm (females), hindfoot 30-33 mm (males) and 29-33 mm (females). No specific data are available for body weight. The Rio Negro Tuco-tuco is relatively small. Greatest skull length is 45-9-47-9 mm (males) and 41-44-6 mm (females), and condylobasal length is 41-42-8 mm (males) and 37-1-40 mm (females). Dorsal color varies extensively: light brownish orange, darkbacked, or melanistic individuals to “agouti” individuals, with small yellow paraunicular spots and yellowish venters. There are no axillary or inguinal spots. Bases of all body hairs are dark gray. Tail is bicolored, with dorsal dark brown line along its length. From above, sides of rostrum are parallel, and temporal crests of parietal are almost parallel. Frontal and parietal have flat dorsal faces. The most external point of zygomatic arch is near its posterior end; vertex of mandibular process of zygoma 1s more rostral with respect to vertex of frontal process; longitudinal crest running along external surface of zygomatic bone is almost straight. Upper incisors are opisthodont.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA22FB17F77AF85B" box="[1462,2282,1894,1927]" pageId="13" pageNumber="524" type="biology_ecology">
<paragraph id="D126FA521B13FFDFFA22FB17F77AF85B" blockId="13.[1460,2670,1036,2558]" box="[1462,2282,1894,1927]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA22FB17F9B5F85B" bold="true" box="[1462,1573,1894,1927]" pageId="13" pageNumber="524">Habitat.</emphasis>
Sand dunes between Rio Negro and Rio Uruguay.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA22FBFFF987F809" pageId="13" pageNumber="524" type="food_feeding">
<paragraph id="D126FA521B13FFDFFA22FBFFF987F809" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA22FBFFF92AF873" bold="true" box="[1462,1722,1934,1967]" pageId="13" pageNumber="524">Food and Feeding.</emphasis>
The Rio Negro Tuco-tuco likely feeds on annual grasses and woody shrubs.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA22FB90F7B4F7F8" pageId="13" pageNumber="524" type="breeding">
<paragraph id="D126FA521B13FFDFFA22FB90F7B4F7F8" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA22FB90F9ACF822" bold="true" box="[1462,1596,2017,2046]" pageId="13" pageNumber="524">Breeding.</emphasis>
Reproduction of the Rio Negro Tuco-tuco is seasonal, with mating in austral autumn. First litters are born in early spring.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA20F45AF6CDF790" box="[1460,2397,2091,2124]" pageId="13" pageNumber="524" type="activity">
<paragraph id="D126FA521B13FFDFFA20F45AF6CDF790" blockId="13.[1460,2670,1036,2558]" box="[1460,2397,2091,2124]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA20F45AF90FF790" bold="true" box="[1460,1695,2091,2124]" pageId="13" pageNumber="524">Activity patterns.</emphasis>
There is no information available for this species.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA21F422F910F6CC" pageId="13" pageNumber="524" type="biology_ecology">
<paragraph id="D126FA521B13FFDFFA21F422F910F6CC" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA21F422F7E2F7A8" bold="true" box="[1461,2162,2131,2164]" pageId="13" pageNumber="524">Movements, Home range and Social organization.</emphasis>
Although the Rio Negro Tuco-tuco is not social like the Colonial Tuco-tuco (C.
<taxonomicName id="169981D11B13FFDFF789F40EF703F740" box="[2077,2195,2175,2204]" class="Mammalia" family="Ctenomyidae" genus="Ctenomys" kingdom="Animalia" order="Rodentia" pageId="13" pageNumber="524" phylum="Chordata" rank="species" species="sociabilis">sociabilis</taxonomicName>
), many individuals were captured in the same burrow. Telemetry studies suggest solitary behavior, but the Rio Negro Tuco-tuco might have an intermediary social pattern. Densities are quite high, reaching 40 ind/ha.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA21F569F913F65B" pageId="13" pageNumber="524" type="conservation">
<paragraph id="D126FA521B13FFDFFA21F569F913F65B" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA21F569F880F6E5" bold="true" box="[1461,1808,2328,2361]" pageId="13" pageNumber="524">Status and Conservation.</emphasis>
Classified as Endangered species on The [UCN Red List. Populations of Rio Negro Tuco-tucos from Argentina and Uruguay are separated by the Uruguay River.
</paragraph>
</subSubSection>
<subSubSection id="9983A9D91B13FFDFFA21F5E6F681F622" pageId="13" pageNumber="524" type="bibRefCitation_list">
<paragraph id="D126FA521B13FFDFFA21F5E6F681F622" blockId="13.[1460,2670,1036,2558]" pageId="13" pageNumber="524">
<emphasis id="E3ED26401B13FFDFFA21F5E6F9DEF66C" bold="true" box="[1461,1614,2455,2480]" pageId="13" pageNumber="524">Bibliography.</emphasis>
Altuna &amp; Lessa (1985), Bidau (2015), Contreras &amp; Bidau (1999), D'Elia et al. (1998), DAnatro &amp; Lessa (2006), Garcia et al. (2000), Kiblisky et al. (1977), Lacey (2000), Lacey et al. (1997), Parada et al. (2011), Reig et al. (1992), Rossi et al. (1995), Tassino et al. (2011), Wlasiuk et al. (2003).
</paragraph>
</subSubSection>
</treatment>
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