2020
DOI: 10.15560/16.2.435
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First record of Tweedy’s Crab-eating Rat, Ichthyomys tweedii Anthony, 1921 (Rodentia, Cricetidae, Sigmodontinae), for Costa Rica

Abstract: Tweedy’s Crab-eating Rat, Ichthyomys tweedii Anthony, 1921, was described based on just a few specimens, and many aspects of its biology remains unclear. The species has only been previously reported to occur in two geographically disjunct areas in Panama and Ecuador. We report a new record of this species for southern Costa Rica. Our new record is the first for this species and the genus for Costa Rica, as well as the northernmost expression of the genus.

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Cited by 6 publications
(5 citation statements)
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“…With regard to primates, data for 205 specimens from the USNM were measured from X-ray images provided by Terry Ritzman to the USNM Collections Database ( https://collections.nmnh.si.edu/search/mammals/ ). Data for the sole proboscidean specimen used in this analysis ( Loxodonta africana , ROM R6000/96185) was taken from Jukar et al [ 121 ], data for Lagidium ahucaense was taken from photographs in Ledesma et al [ 209 ], and data for Ichthyomys stolzmanni and I. tweedii were taken from Brito et al [ 210 ] and Ramírez-Fernández et al [ 211 ], respectively. Data for the specimen of Zaglossus bruijni (AMNH 157072) and Hydromys chrysogaster (MVZ 175330) were measured from CT scans from MorphoSource ( https://www.morphosource.org ).…”
Section: Methodsmentioning
confidence: 99%
“…With regard to primates, data for 205 specimens from the USNM were measured from X-ray images provided by Terry Ritzman to the USNM Collections Database ( https://collections.nmnh.si.edu/search/mammals/ ). Data for the sole proboscidean specimen used in this analysis ( Loxodonta africana , ROM R6000/96185) was taken from Jukar et al [ 121 ], data for Lagidium ahucaense was taken from photographs in Ledesma et al [ 209 ], and data for Ichthyomys stolzmanni and I. tweedii were taken from Brito et al [ 210 ] and Ramírez-Fernández et al [ 211 ], respectively. Data for the specimen of Zaglossus bruijni (AMNH 157072) and Hydromys chrysogaster (MVZ 175330) were measured from CT scans from MorphoSource ( https://www.morphosource.org ).…”
Section: Methodsmentioning
confidence: 99%
“…According to this report and recent confirmations of other mammals in Costa Rica (Rodríguez-Herrera et al 2014;Ramírez-Fernández et al 2015, 2020Villalobos-Chaves et al 2016Woodman and Timm 2017;González-Maya et al 2017;Sáenz-Bolaños et al 2019;York et al 2019), the number of extant mammal species for the country is increased to 261 species, including 121 total species of bat. A future goal should be to generate and analyze acoustic recordings in the country to better understand the distribution and ecology of C. greenhalli and other cryptic bat species.…”
Section: Discussionmentioning
confidence: 65%
“…3%-8%; table 1) are consistent with a post-land-bridge radiation, 13 This specimen was received at the Bronx Zoo on 2 May 1952, where it died three days later. but in the absence of any real evidence for the Gardner and Carleton, 2009;Ramirez-Fernandez et al, 2020) can be cited for Costa Rica, which also has a long history of mammalogical fieldwork.…”
Section: Discussionmentioning
confidence: 99%