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Volume 81, Issue 3 (May 2017)


Geographical extension of Chaetodipus fallax (Rodentia: Heteromyidae) in the Baja California Peninsula

Issac Camargo
  • Centro de Investigaciones Biológicas del Noroeste, Instituto Politécnico Nacional 195, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur 23090, Mexico
/ Evelyn Rios
  • Centro de Investigaciones Biológicas del Noroeste, Instituto Politécnico Nacional 195, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur 23090, Mexico
/ Sergio Ticul Álvarez-Castañeda
  • Corresponding author
  • Centro de Investigaciones Biológicas del Noroeste, Instituto Politécnico Nacional 195, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur 23090, Mexico
  • Email:
Published Online: 2016-05-11 | DOI: https://doi.org/10.1515/mammalia-2015-0122


We report two new locations for Chaetodipus fallax (Merriam 1889) in Baja California Sur, Mexico: the first, south of San Ignacio; and the second, in the plains of Magdalena Bay. These are the southernmost records for the presence of this species and broaden the species’ previously known distribution range in ~400 km. We suggest that changes in weather conditions could explain the southward expansion of the distribution of C. fallax in Baja California Peninsula.

Keywords: adaptation; arid zones; desert; pocket mouse; recent range expansion


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About the article

Received: 2015-07-18

Accepted: 2016-03-18

Published Online: 2016-05-11

Published in Print: 2017-05-01

Funding Source: Consejo Nacional de Ciencia y Tecnología

Award identifier / Grant number: 151189

We acknowledge the financial support provided by the Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (JF209), Consejo Nacional de Ciencia y Tecnología (151189).

Citation Information: Mammalia, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: https://doi.org/10.1515/mammalia-2015-0122.

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