Estimating relative CP size (RelCP) to predict likely position of two non-genome species, the sabertooth cat (Smilodon fatalis) and the gray wolf (Canis lupus), on our olfactory scale.

(a), Log-log plot of absolute CP surface area regressed against body mass for all sample species plus the extinct felid (Smilodon fatalis). Residual value for Smilodon was used to estimate RelCP for the sabertooth cat. (b), Smilodon CP surface area is smaller for its body size than most of the ten living felid species for which CP data is known. (c), In a regression of CP surface area vs. body size among the sample ¬species plus the gray wolf (Canis lupus), the wolf has a larger RelCP than the domestic dog (species mean of four dog breeds), predicting a larger ORG repertoire. All work was done in R (3.2.1)