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New records of Natalus tumidirostris (Chiroptera: Natalidae) in Colombia, with notes on morphometric variation. We present three new records for Natalus tumidirostris in Colombia, including the first record from the eastern side of the Andes in the Guiana region in the Serranía de La Macarena, and two new localities from the Caribbean region; one of them represents the first record of Natalus tumidirostris in humid forests for the country. Morphometric analyses show secondary sexual dimorphism, with males bigger than females. Individuals from the eastern side of the Andes are bigger than those from the Caribbean and Andean regions. [ABSTRACT FROM AUTHOR]

We present the results obtained during four years of sampling of mammals in different plant covers of the municipality of San José del Guaviare, Guaviare, Colombia. Between 2012 and 2017 we collected information about diversity of mammals, through capture with mist nets, traps for small and medium mammals, camera traps, direct observations, interviews, and secondary information. We report 121 species of mammals for the municipality. We recorded sampling completeness of 64% for bats, 60% for small non-flying mammals, and 100% for medium and large mammals. We highlight geographical novelties for the marsupials Marmosa waterhousei, Glironia venusta and for the bats Lonchorhina marinkellei, Phyllostomus latifolius, Glyphonycteris sylvestris, Glyphonycteris daviesi, Glossophaga commissarisi and Myotis keaysi. The richness found in this study is comparable with other long-term neotropical inventories and the area has the largest number of bat and primate species reported for any site in Colombia. However, it is necessary to continue with the intensive sampling, because the richness of small non-volant mammals and bats are still underestimated. [ABSTRACT FROM AUTHOR]