Oryzomys couesi

Coues's Marsh Rice Rat
(*Oryzomys couesi*)
Coues's Marsh Rice Rat (Oryzomys couesi)
Range
Taxonomic classification
Order:	Rodentia
Suborder:	Supramyomorpha
Infraorder:	Myomorphi
Superfamily:	Muroidea
Family:	Cricetidae
Subfamily:	Sigmodontinae
Tribe:	Oryzomyini
Genus:	Oryzomys
Binomial details
	Oryzomys couesi (Alston, 1877)
Other resources
	Full taxonomic details at MDD

Description

From Schmidly & Bradley (2016): "Similar to O. texensis (formerly O. palustris) but pelage shorter and color ochraceous buffy or ochraceous tawny instead of grayish brown; underparts buffy instead of whitish."

Museum specimens

Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896.

External measurements

Length measurements are in millimeters (mm) and weight measurements are in grams (g), unless stated otherwise. If available, the sample size (n=) is provided. If a range is not provided and n= is not given, then the listed measurement represents an average.

Part of range	Reference	Total length	Tail length	Hindfoot length	Ear length	Mass
not reported	Ceballos (editor, 2014)	242–294	120–145	28–40	13–18	40–80
Texas	Schmidly & Bradley (2016)	297	161	34		65.3 (50–86)

Skull

Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Dorsal view of the skull.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Ventral view of the skull.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Lateral view of the skull.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Dorsal view of the mandible.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Lateral view of the left mandible.
Holotype: USNM 78110. Oryzomys couesi couesi. Adult female. Coatzacoalcos, Veracruz, Mexico. Collected 11 April 1896. Upper molars.

Similar species

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References

Ceballos G, editor. 2014. Mammals of Mexico. Baltimore (MD, USA): Johns Hopkins University Press.

Hanson JD, Indorf JL, Swier VJ, Bradley RD. 2010. Molecular divergence within the Oryzomys palustris complex: evidence for multiple species. Journal of Mammalogy 91(2):336-347.

Schmidly DJ, Bradley RD. 2016. The mammals of Texas. Austin (TX, USA): University of Texas Press.