Figure 11 from: Kavanaugh D, Archambeault S, Roopnarine P, Ledford J (2011) A re-consideration of the taxonomic status of Nebria lacustris Casey (Coleoptera, Carabidae, Nebriini) based on multiple datasets – a single species or a species complex? ZooKeys 147: 199-228. https://doi.org/10.3897/zookeys.147.2082

Figure 11 - Principal components analysis scores of Nebria lacustris versus location and elevation. Body size (PC I) varies significantly with the three factors, while the independent shape variable, PC II, varies significantly with location. Individual regression lines drawn on plots represent individual relationships within multiple regression models (see text for explanation). A quadratic model is selected for the relationship between PC I and longitude because a first order linear model results in non-normally distributed residuals (linear model is shown as light blue straight line). "N" on plots indicates cardinal direction north.