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).

(a) 针对所有样本物种及已灭绝的致命刃齿虎（Smilodon fatalis），绘制绝对CP表面积（Cortical Surface Area）对体重的双对数回归图，并以该剑齿虎的残差值估算其相对CP（Relative CP，RelCP）。(b) 相较于10种已获取CP表面积数据的现生猫科动物，致命刃齿虎的CP表面积相对于其体型而言偏小。(c) 在针对样本物种与灰狼（Canis lupus）的CP表面积与体型的回归分析中，灰狼的相对CP高于家犬（以4个家犬品种的平均值作为其物种均值），这预示其拥有更为丰富的ORG组库。所有分析均在R（3.2.1）软件中完成。