Morphological variation of six species that comprise the B. boreas species complex of the Great Basin. Fourteen morphological measurements (in mm) are as follows: snout–vent length (SVL), head length (HL), head width (HW), snout length (SL), internarial distance (IND), eye diameter (ED), interorbital distance (IOD), tympanum diameter (TYM), parotoid width (PW), parotoid length (PL), interparotoid distance (IPD), femur length (FL), tibial length (TL), and foot length (FTL). Data include sample size (n), character mean ± standard deviation, and range. All measurements reflect raw, unadjusted values.