Table S1

Dimorphism estimates and information about analyzed populations. Status indicates whether reasonable dimorphism estimates could be obtained ("OK") or why they could not be found. ∆BIC is the difference in support between the best one- (BIC1) and two-group (BIC2) models, with positive values indicating greater support for the two-group model. CovStruct refers to the assumptions of the best supported model about how variance/covariance patterns are similar across sexes (see Table 1); CovStruct Selection indicates whether the CovStruct assumption was the best supported among all those implemented in Mclust ("best model") or if only a subset of models were considered ("imposed", with "imposed E_I" indicating that only models EEI, EVI, and EII were allowed). Combining data left and right valves requires specifying a method for this offset (LR offset method); see text for details. Dimorphism, female area and female L/H data were all natural-log transformed.