Aegialomys galapagoensis galapagoensis Waterhouse, 1839:66

San Cristobal Island rice rat, Chatham Island rice rat



Taxonomy & Nomenclature

Synonym/s: Oryzomys galapagoensis Waterhouse, 1839:66


Possibly conspecific with the surviving subspecies A. g. bauri (Cabrera, 1961; Patton & Hafner, 1983).


Conservation Status

Extinct or rediscovered

Last record: 1835 (Goodwin & Goodwin, 1973)

IUCN RedList status: Extinct



San Cristobal (=Chatham Island), Galapagos Islands


Biology & Ecology










Allen, J.A. (1892) On a Small Collection of Mammals from the Galapagos Islands, collected by Dr. G. Baur. Bull. Am. Mus. Nat. His. 4: 47-50.

Cabrera, A. (1961). Catálogo de los mamíferos de América del Sur. Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". Ciencias Zoológicas 4(2): v-xxii + 309-732.

Dowler, R. C., Carroll, D. S. and Edwards, C. W (2000). Rediscovery of rodents (Genus Nesoryzomys) considered extinct in the Galapagos Islands. Oryx 34(2): 109-118.

Gardner, A. L. and Patton, J. L. (1976). Karyotypic variation in oryzomyine rodents (Cricetinae) with comments on chromosomal evolution in the Neotropical cricetine complex. Occasional Papers of the Museum of Zoology, Louisiana State University 49: 1-48.

Goodwin, Harry A. and Goodwin, J. M. (1973). List of mammals which have become extinct or are possibly extinct since 1600. Int. Union Conserv. Nat. Occas. Pap. 8: 1-20.

Harris, D.B. (2006) Introduced black rats and endemic Galapagos rice rats: competition, coexistence and conservation. A thesis submitted for the degree of Doctor of Philosophy. Linacre College, Oxford.

Jiménez-Uzcátegui, G., Milstead, B., Márquez, C., Zabala, J., Buitrón, P., Llerena, A., et al. (2007) Galapagos vertebrates: endangered status and conservation actions. Galapagos Report 2006–2007. Charles Darwin Foundation, Puerto Ayora, p. 104–110.

Jiménez-Uzcátegui, Gustavo and Snell, Howard L. (2014). CDF Checklist of Galapagos Mammals - FCD Lista de especies de Mamíferos Galápagos. In: Bungartz, F., Herrera, H., Jaramillo, P., Tirado, N., Jiménez-Uzcátegui, G., Ruiz, D., Guézou, A. & Ziemmeck, F. (eds.). Charles Darwin Foundation Galapagos Species Checklist - Lista de Especies de Galápagos de la Fundación Charles Darwin. Charles Darwin Foundation / Fundación Charles Darwin, Puerto Ayora, Galapagos: Last updated: 24 Jan 2014

Orr, R.J. (1966) Evolutionary aspects of the mammalian fauna of the Galapagos. In: Bowman, R.I. (ed.): The Galapagos. Proc. Symposia G.I.S.P., Univ. Calif. Press, Berkeley, p. 276-281.

Patton, J. L. and Hafner, M. S. (1983). Biosystematics of the native rodents of the Galapagos Archipelago, Ecuador. In: Bowman, R. I., Benson, M. and Leviton, A. E. (eds.). Patterns of Evolution in Galapagos Organisms, pp. 539-568.

Percequillo, A. R. (2015): Mammals of South America, Volume 2: Rodents. Genus Aegialomys. University of Chicago Press.

do Prado, Joyce Rodrigues and Percequillo, Alexandre Reis. (2016). Systematic studies of the genus Aegialomys Weksler, Percequillo and Voss, 2006 (Rodentia: Cricetidae: Sigmodontinae): Annotated catalogue of the types of the species-group taxa. Zootaxa 4144(4): 477-498.

Snell, H.L., Tye, A., Causton, C.E. & Bensted-Smith, R. (1999) Estado y amenazas de la biodiversidad terretre de Galápagos. Visión para la biodiversidad de las islas Galápagos. Fundación Charles Darwin para las islas Galápagos y WWF. Puerto Ayora, Galápagos.

Steadman, David W., Stafford, Thomas W. Jnr., Donahue, Douglas J. and Jull, A. J. Timothy. (1991). Chronology of Holocene vertebrate extinction in the Galápagos Islands. Quaternary Research 36(1): 126-133.

Tirira, D. (2017). A Field Guide to the Mammals of Ecuador. Publicaciones Especiales sobre los Mamíferos del Ecuador no. 10. Editorial Murciélago Blanco.

Tirira, D., Boada, C. and Weksler, M. (2008). Aegialomys galapagoensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 23 December 2012.

Weksler, M., Reis Percequillo, A. & Voss, R.S. (2006) Ten New Genera of Oryzomyine Rodents (Cricetidae: Sigmodontinae). American Museum Novitates 3537: 1-29.

Wilson, D.E. Reeder, D.M. (2005) Mammal species of the world, 3rd ed. Johns Hopkins University Press, Baltimore.


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