Table 1.

Measurements used in this study

Acronym	Definition
BM	Body mass
TL	Total length, from tip of snout to tip of tail, measured in supine position
BL	Basal length
PL	Palate length, measured along the ∼ midline of the skull from the anterior to the alveoli for the first incisors to the posterior border of the palate
LUTR	Length of the upper tooth row, from the anterior margin of the C1 alveolus to the posterior margin of the last postcanine alveolus (M1 and M2), as a straight line distance
LUPC	Length of the upper postcanine tooth row, as measured from the anterior margin of the P1 alveolus to the posterior margin of the last postcanine alveolus (either M1 or M2)
CW	Width of the rostrum across the canines
BZB	Bizygomatic width of cranium
LB	Length of the auditory bulla along the medial margin from anterior opening of the auditory tube to the posterior lacerate foramen
WB	Width of the auditory bulla from the lateralmost margin of the eustachian tube to the medial margin of the bulla at the approximate midpoint of its length
OCB	Width across the occipital condyles
HOC	Height of the occipital shield along the midline, from the intercondylar notch to the junction of the sagittal and lambdoidal crests
OL	Length of orbit, the straightline distance between the antorbital process of the maxilla/frontal, to the postorbital process of the jugal
LM	Length of mandible from the anterior terminus to the approximate center of the posterior surface of the mandibular condyle
LLTR	Length of the lower tooth row, from the anterior margin of the C1 alveolus to the posterior margin of the M1
LLPC	Length of the lower postcanine tooth row, as measured from the anterior margin of the P1 alveolus to the posterior margin of the M1