Description Usage Format Details Source References Examples
Microtus multiplex and M. subterraneus are difficult to distinguish morphologically. Here we have 43 known multiplex, 46 known subterraneus and a further 199 unidentified species.
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A data frame with 288 observations with a factor indicating the species and observations on a further 8 variables.
Group
a factor with levels multiplex
subterraneus
unknown
M1Left
Width of upper left molar 1 (0.001mm)
M2Left
Width of upper left molar 2 (0.001mm)
M3Left
Width of upper left molar 3 (0.001mm)
Foramen
Length of incisive foramen (0.001mm)
Pbone
Length of palatal bone (0.001mm)
Length
Condylo incisive length or skull length (0.01mm)
Height
Skull height above bullae (0.01mm)
Rostrum
Skull width across rostrum (0.01mm)
89 species have been identified by means of chromosomal analysis.
Airoldi, J.-P., B. Flury, M. Salvioni (1996) dQuoteDiscrimination between two species of Microtus using both classified and unclassified observations Journal of Theoretical Biology 177:247-262
Flury, B.D. (1997) A First Course in Multivariate Statistics, New York: Springer
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