MammalBase - Accepted taxon: Microtus pennsylvanicus

Accepted taxon: Microtus pennsylvanicus
Taxon:	Microtus pennsylvanicus
Rank:	Species
Higher Classification:	RODENTIA \| MYOMORPHA \| Muroidea \| Cricetidae \| Arvicolinae \| Microtus \| Mynomes
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 Microtus pennsylvanicus diet.
CF (Crude Fibre) 24, ASH (Ash contents) 8, NFE (Nitrogen-Free-Extract) 50, CP (Crude Protein) 14, EE (Ether Extract) 3. 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 Microtus pennsylvanicus.
TSN Complete name	Part	Ratio ^a.	Reference(s)
Poaceae	STEM	33.97	Damuth, J…
Cyperaceae	LEAF	26.83	Damuth, J…
Magnoliopsida	SEED	10.79	Grzimek,B…
Magnoliopsida	SHOOT	10.00	Damuth, J…
Poaceae	SEED	6.98	Grzimek,B…
Magnoliopsida	LEAF	6.67	Damuth, J…
Magnoliopsida	BARK	3.17	Reid,F., …
Insecta	WHOLE	1.59	Reid,F., …

^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 Microtus pennsylvanicus.
Trait	Selected Value	All Value(s)	Reference(s)
Dietary category: Miljutin 2009	Herbivore	Herbivore	– Brian K. McNab, 1986, 'The Influence of Food Habits on the Energetics of Eutherian Mammals', Ecological Monographs, vol. 56, no. 1, p. 1
Hypsodonty	3 = hypsodont	3 = hypsodont	– Carleton,M. D., 1980, Phylogenetic relationships in neotomine-peromyscine rodents (Muroidea) and a reappraisal of the dichotomy within New World Cricetinae,, Pacheco,V. R., 2003, Phylogenetic analyses of the Thomasomyini (Muroidea: Sigmodontinae) based on morphological data, Unpublished Ph.D.diss., City University of New York
Dietary category: Eisenberg 1981	Herbivore-Grazer	Herbivore-Browser, Herbivore-Grazer	– Brian K. McNab, 1986, 'The Influence of Food Habits on the Energetics of Eutherian Mammals', Ecological Monographs, vol. 56, no. 1, p. 1

Table 3. List of Standard Measurements for Microtus pennsylvanicus.
Measurement	Location	Unit	n Total	n Unknown	n Female	n Male	Min	Mean	Max	SD	Reference(s)
Body Mass (BM)	nan	g	-	-	-	-	20	-	75	-	Freudenth…
Body Mass (BM)	nan	g	8	8	-	-	-	34.26	-	-	Engelman,…
Head-Body Length (HBL)	nan	mm	-	-	-	-	-	119	-	-	Engelman,…
Occipital condyle width (OCW)	nan	mm	8	8	-	-	-	5.61	-	-	Engelman,…

Table 4. List of other Measurements ^b. for Microtus pennsylvanicus.
Measurement	Location	Unit	n Total	n Unknown	n Female	n Male	Min	Mean	Max	SD	Reference(s)
brainmass	nan	g	-	-	-	-	-	1	-	-	Engelman,…
skull_length	nan	mm	-	-	-	-	-	28	-	-	Engelman,…
BMR (kJ/h)	nan	kJ/h	-	-	-	-	-	2	-	-	McNab, B.…
femur circumference	nan	mm	-	-	-	-	-	6	-	-	Nelson, A…
humerus circumference	nan	mm	-	-	-	-	-	5	-	-	Nelson, A…
BMR,mlO2/h	nan	mlO2/h	15	15	-	-	-	73	-	-	Genoud, M…
BMR,mlO2/h	nan	mlO2/h	10	10	-	-	-	80	-	-	Genoud, M…

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

Table 5. List of Data Sources for Microtus pennsylvanicus.
Taxon	Reference	Match	Status
Microtus pennsylvanicus	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
Microtus pennsylvanicus	Carleton,M. D., 1980, Phylogenetic relationships in neotomine-peromyscine rodents (Muroidea) and a reappraisal of the dichotomy within New World Cricetinae,	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Nowak,R. M., 1991, Walker's mammals of the world,	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	McNab,B. K., 1986, The influence of food habits on the energetics of eutherian mammals, Ecological Monographs	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	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
Microtus pennsylvanicus	Reid,F., 2006, Peterson field guide to mammals of North America,	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Grzimek,B., 2003, Grzimek's Animal Life Encyclopedia: Mammals I-V,	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Everson, K.M., McGinnis, R.C., Burdine, O.P., Huddleston, T.R., Hylick, T.M., Keith, A.L., Moore, S.C., O’Brien, A.E., Vilardo, A.L. and Krupa, J.J., 2023. Disentangling morphology and genetics in two voles (Microtus pennsylvanicus and M. ochrogaster) in a region of sympatry. Journal of Mammalogy, p.gyac119.	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Engelman, R.K., 2022. Occipital condyle width (OCW) is a highly accurate predictor of body mass in therian mammals. BMC biology, 20(1), p.37.	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	DeMers, A.C., 2023. Functional Significance of the Mandible, Tooth Roots, and Tooth Crowns, and their Implications for Fossil Dietary Inference (Doctoral dissertation, The Ohio State University).	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	McNab, B.K., 2008. An analysis of the factors that influence the level and scaling of mammalian BMR. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 151(1), pp.5-28.	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Nelson, A., Engelman, R.K. and Croft, D.A., 2023. How to weigh a fossil mammal? South American notoungulates as a case study for estimating body mass in extinct clades. Journal of Mammalian Evolution, 30(3), pp.773-809.	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	Genoud, M., Isler, K. and Martin, R.D., 2018. Comparative analyses of basal rate of metabolism in mammals: data selection does matter. Biological Reviews, 93(1), pp.404-438.	1: Exact Taxon match	Verified - Accepted
Microtus pennsylvanicus	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 2026. / CC BY 4.0. http://doi.org/10.5281/zenodo.7462864 Microtus pennsylvanicus , Accessed 30th April 2026 at https://mammalbase.net/me/8441]