Uromys imperator Thomas, 1888:157

Emperor rat, Emperor uromys



Taxonomy & Nomenclature

Synonym/s: Cyromys imperator Thomas, 1888:157


Conservation Status


Last record: 1886-1888 (collected); 1887 (Fisher & Blomberg, 2012); 1888 (Martin et al., 2023); pre-c.1960 (sightings by locals) (both Flannery, 1995:173)

IUCN RedList status: Critically Endangered (Possibly Extinct)



Guadalcanal (northern), Solomon Islands


Biology & Ecology




BMNH (adult male)






Original scientific description:

Thomas, Oldfield. (1888). Diagnosis of six new Mammals from the Solomon Islands. Annals and Magazine of Natural History, London 1: 155-158.


Other references:

Fisher, Diana O. and Blomberg, Simon P. (2012). Inferring Extinction of Mammals from Sighting Records, Threats, and Biological Traits. Conservation Biology 26(1): 57-67.

Flannery, Timothy F. (1991). Emperor, king and Little pig: the three rats of Guadalcanal. Australian Natural History 23: 634-641.

Flannery, Timothy F. (1995). Mammals of the South-West Pacific and Moluccan Islands. Comstock/Cornell, Ithaca, Ny, USA. [p. 173]

Freudenthal, M. and Martín-Suárez, E. (2013). Estimating body mass of fossil rodents. Scripta Geologica 145: 1-130. [1.0 kg min. mass estimate]

Groves, Colin P. and Flannery, Timothy F. (1994). A revision of the genus Uromys Peters, 1867 (Muridae: Mammalia) with descriptions of two new species. Records of the Australian Museum 46(2): 145-170.

Helgen, K., Leary, T. and Wright, D. (2016). Uromys imperator. The IUCN Red List of Threatened Species 2016: e.T22803A22447074. Accessed on 06 July 2022.

Lavery, T. H. (2013). A reassessment of the type locality of the giant rat Solomys salamonis (Rodentia: Muridae) from the Solomon Islands. Australian Mammalogy 36(1): 99-102.

Leary, T., Seri, L., Flannery, T., Wright, D., Hamilton, S., Helgen, K., Singadan, R., Allison, A., James, R. & Bonaccorso, F. (2008). Uromys imperator. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. ( Downloaded on 30 July 2013.

Lee, T. E., Fisher, D. O., Blomberg, S. P. and Wintle, B. A. (2017). Extinct or still out there? Disentangling influences on extinction and rediscovery helps to clarify the fate of species on the edge. Global Change Biology 23(2): 621-634.

Martin, Thomas E., Bennett, Gareth C., Fairbairn, Andrew J. and Mooers, A. Ø. (2023). ‘Lost’ taxa and their conservation implications. Animal Conservation 26(1): 14-24. [Appendix S2 (1617 taxa not seen >10 years); Appendix S3 (562 taxa not seen >50 years)]


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