Check List 16(2): 435-440, doi: 10.15560/16.2.435

First record of Tweedy’s Crab-eating Rat, Ichthyomys tweedii Anthony, 1921 (Rodentia, Cricetidae, Sigmodontinae), for Costa Rica

José D. Ramírez-Fernández^‡§, Francisco J. Durán A.^|, Marcela Fernández-Vargas^¶

‡ Universidad de Costa Rica, San José, Costa Rica§ Skuë’ Conservation, Costa Rica Wildlife Foundation, San José, Costa Rica| Museo Nacional de Costa Rica, San José, Costa Rica¶ University of Massachusetts Amherst, Amherst, United States of America

Corresponding author: José D. Ramírez-Fernández ( jramirez@costaricawildlife.org )

Academic editor: William Tavares

This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Citation: Ramírez-Fernández JD, Durán A FJ, Fernández-Vargas M (2020) First record of Tweedy’s Crab-eating Rat, Ichthyomys tweedii Anthony, 1921 (Rodentia, Cricetidae, Sigmodontinae), for Costa Rica. Check List 16(2): 435-440. https://doi.org/10.15560/16.2.435

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.

Keywords

Costa Rica mammals, Ichthyomyini, Las Cruces Biological Station, new record, range extension, water rat