MammalBase - Accepted taxon: Oecomys bicolor

Accepted taxon: Oecomys bicolor
Taxon:	Oecomys bicolor
Rank:	Species
Higher Classification:	RODENTIA \| MYOMORPHA \| Muroidea \| Cricetidae \| Sigmodontinae \| Oecomys
Reference:	Wilson, Don E., and DeeAnn M. Reeder, eds. Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed), JHU Press, 2005.

Fig.1 - Ternary plot of the proximate analysis for the Oecomys bicolor diet.
CF (Crude Fibre) 11, ASH (Ash contents) 4, NFE (Nitrogen-Free-Extract) 57, CP (Crude Protein) 19, EE (Ether Extract) 8. See details for the calculations in Lintulaakso, K., Tatti, N. and Žliobaitė, I., 2022. Quantifying mammalian diets. Mammalian Biology, pp.1-15. [DOI]

Table 1. List of Diet Items for Oecomys bicolor.
TSN Complete name	Part	Ratio ^a.	Reference(s)
Magnoliopsida	FRUIT	50.00	Damuth, J…
Magnoliopsida	SEED	33.33	Damuth, J…
Insecta	WHOLE	16.67	Damuth, J…

^a. Standardized values. See details for the calculations in Lintulaakso, K., Tatti, N. and Žliobaitė, I., 2022. Quantifying mammalian diets. Mammalian Biology, pp.1-15. [DOI]

Table 2. List of Standard Traits for Oecomys bicolor.
Trait	Selected Value	All Value(s)	Reference(s)
Dietary category: Eisenberg 1981	Frugivore-Granivore	Frugivore-Granivore	Paglia,A.…
Dietary category: Miljutin 2009	Frugivore	Frugivore	JOSHUA X.…
Hypsodonty	1 = brachydont	1 = brachydont	ALEXANDRE…
Locomotion: Eisenberg 1981	Arboreal	Arboreal	Paglia,A.…

Table 3. List of Standard Measurements for Oecomys bicolor.
Measurement	Location	Unit	n Total	n Unknown	n Female	n Male	Min	Mean	Max	SD	Reference(s)
Body Mass (BM)	nan	g	-	-	-	-	20	-	60	-	Freudenth…
Body Mass (BM)	Brazil	g	-	-	-	-	-	28	-	-	Paglia,A.…
Body Mass (BM)	Brazilian Central Amazonia	g	17	17	-	-	18	24.62	36.1	5	Saldanha,…
Ear Length (EL)	Brazilian Central Amazonia	mm	23	23	-	-	10.5	14.36	19	2	Saldanha,…
Tail Length (TL)	Brazilian Central Amazonia	mm	22	22	-	-	75	98.43	125	13	Saldanha,…

Table 4. List of other Measurements ^b. for Oecomys bicolor.
Measurement	Location	Unit	n Total	n Unknown	n Female	n Male	Min	Mean	Max	SD	Reference(s)
braincase height (BH)	Brazilian Central Amazonia	mm	24	24	-	-	7	8	9	1	Saldanha,…
breadth across the exoccipital condyles (BOC)	Brazilian Central Amazonia	mm	24	24	-	-	5	6	7	0	Saldanha,…
breadth across the incisive foramina (BIF)	Brazilian Central Amazonia	mm	24	24	-	-	2	2	2	0	Saldanha,…
breadth of interparietal (BIP)	Brazilian Central Amazonia	mm	24	24	-	-	8	9	10	0	Saldanha,…
breadth of M1 (BM1)	Brazilian Central Amazonia	mm	24	24	-	-	1	1	1	0	Saldanha,…
breadth of M1 (BM1)	Brazilian Central Amazonia	mm	24	24	-	-	1	1	1	0	Saldanha,…
breadth of palatal bridge (BPB)	Brazilian Central Amazonia	mm	24	24	-	-	2	3	5	1	Saldanha,…
breadth of rostrum (BR)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	5	0	Saldanha,…
breadth of rostrum at palate (BRP)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	5	1	Saldanha,…
breadth of the zygomatic plate (BZP)	Brazilian Central Amazonia	mm	24	24	-	-	2	2	3	0	Saldanha,…
breadth of upper incisor (BI)	Brazilian Central Amazonia	mm	24	24	-	-	1	2	2	0	Saldanha,…
bullar breadth (BB)	Brazilian Central Amazonia	mm	24	24	-	-	4	4	5	0	Saldanha,…
condylo-incisive length (CIL)	Brazilian Central Amazonia	mm	24	24	-	-	18	23	26	2	Saldanha,…
condylo-zygomatic length (CZL)	Brazilian Central Amazonia	mm	24	24	-	-	15	19	21	1	Saldanha,…
coronal length of lower molars (CLLM)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	4	0	Saldanha,…
coronal length of upper molars (CLM)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	4	0	Saldanha,…
greatest zygomatic breadth (ZB)	Brazilian Central Amazonia	mm	24	24	-	-	11	13	15	1	Saldanha,…
least condyloid Incisor breadth (LCIB)	Brazilian Central Amazonia	mm	24	24	-	-	10	12	14	1	Saldanha,…
least interorbital breadth (LIB)	Brazilian Central Amazonia	mm	24	24	-	-	4	5	5	0	Saldanha,…
length of head and body (HBL)	Brazilian Central Amazonia	mm	23	23	-	-	62	95	118	12	Saldanha,…
length of hind foot (HF)	Brazilian Central Amazonia	mm	21	21	-	-	13	20	24	2	Saldanha,…
length of incisive foramen (LIF)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	5	0	Saldanha,…
length of interparietal (LIP)	Brazilian Central Amazonia	mm	24	24	-	-	3	4	4	0	Saldanha,…
length of lower diastema (LLD)	Brazilian Central Amazonia	mm	24	24	-	-	3	3	5	0	Saldanha,…
length of nasals (LN)	Brazilian Central Amazonia	mm	24	24	-	-	7	9	10	1	Saldanha,…
length of palatal bridge (LPB)	Brazilian Central Amazonia	mm	24	24	-	-	4	4	5	0	Saldanha,…
length of rostrum (LR)	Brazilian Central Amazonia	mm	24	24	-	-	6	8	9	1	Saldanha,…
length of upper diastema (LD)	Brazilian Central Amazonia	mm	24	24	-	-	5	6	7	1	Saldanha,…
mandible height (MH)	Brazilian Central Amazonia	mm	24	24	-	-	5	6	8	1	Saldanha,…
mastoid breadth (MB)	Brazilian Central Amazonia	mm	24	24	-	-	9	10	11	1	Saldanha,…
occipitonasal length (ONL)	Brazilian Central Amazonia	mm	19	19	-	-	21	25	28	1	Saldanha,…
orbital length (OL)	Brazilian Central Amazonia	mm	24	24	-	-	8	9	10	1	Saldanha,…
zygomatic length (ZL)	Brazilian Central Amazonia	mm	19	19	-	-	9	11	12	1	Saldanha,…

^b. other Measurements. Source Measurements which are not listed on or mapped with the Standard Traits..

Table 5. List of Data Sources for Oecomys bicolor.
Taxon	Reference	Match	Status
Oecomys bicolor	Pacheco,V. R., 2003, Phylogenetic analyses of the Thomasomyini (Muroidea: Sigmodontinae) based on morphological data, Unpublished Ph.D.diss., City University of New York	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Nowak,R. M., 1991, Walker's mammals of the world,	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	PERCEQUILLO,A. R., 2011, A new genus and species of rodent from the Brazilian Atlantic Forest (Rodentia: Cricetidae: Sigmodontinae: Oryzomyini), with comments on oryzomyine biogeography, Zoological Journal of the Linnean Society	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	SAMUELS,J. X., 2009, Cranial morphology and dietary habits of rodents, Zoological Journal of the Linnean Society	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Paglia,A. P., 2012, Lista Anotada dos MamÃƒÂferos do Brasil 2Ã‚Âª EdiÃƒÂ§ÃƒÂ£o Annotated Checklist of Brazilian Mammals,	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Hice,C. L., 2011, The non-volant mammals of the EstaciÃƒÂ³n BiolÃƒÂ³gica Allpahuayo: Assessment of the natural history and community ecology of a proposed reserve,	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Damuth, J. 2010. ABSOLUT 6 a mammalian database compiled by the national center for ecological analysis and synthesis (NCEAS ) workshop on mammalian communities.	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Saldanha, J., Semedo, T.B.F., de Mendonça, R.F.B., Lima-Silva, L.G., Messias, M.R., Sampaio, I., Brandão, M.V. and Rossi, R.V., 2023. Unveiling hidden diversity of Oecomys (Rodentia: Cricetidae) from Brazilian Central Amazonia: description of a new species and new lineages. Systematics and Biodiversity, 21(1), p.2259037.	1: Exact Taxon match	Verified - Accepted
Oecomys bicolor	Freudenthal, M. and Martín-Suárez, E., 2013. Estimating body mass of fossil rodents. Scripta Geologica, 145, pp.1-513.	1: Exact Taxon match	Verified - Accepted

Citation for this page: [The MammalBase community 2025. / CC BY 4.0. http://doi.org/10.5281/zenodo.7462864 Oecomys bicolor , Accessed 30th November 2025 at https://mammalbase.net/me/8805]