Table 2. Measurements (mm) of teeth in female and male specimens of Maiacetus inuus.

Tooth pos.	Upper teeth				Dimorphism	Tooth pos.	Lower teeth				Dimorphism1	All
	Female GSP-UM 3475a		Male GSP-UM 3551				Female GSP-UM 3475a		Male GSP-UM 3551			Median M/F dimorphism
	Left	Right	Left	Right	M/F		Left	Right	Left	Right	M/F
I1 L	16.84					I1 L
W	12.28					W
H	29.07					H
I2 L	18.26	18.17				I2 L	18.00*	17.80
W		12.61				W		16.30
H	23.49	29.03				H
I3 L	16.01	14.91				I3 L	14.17
W		9.36				W	9.52*
H	12.60	15.24				H	12.43*
C1 L		19.23		23.80*	1.24	CI1 L	18.09
W	13.21*			13.65	1.03	W	10.95					1.20
H	26.00			31.30	1.20	H
P1 L		16.81		16.24	0.97	P1 L	15.69
W		7.76		8.98	1.16	W	8.69
H		16.13		17.06	1.06	H	14.10
P2 L		28.60		29.00	1.01	P2 L	28.28		28.97		1.02
W				12.72		W	11.00*		11.44		1.04
H				27.25		H			27.64
P3 L		28.65		33.79	1.18	P3 L
W				16.40		W	11.60		12.06		1.04
H				25.04		H			30.42
P4 L		25.46		25.57	1.00	P4 L			33.15
W				20.22		W			12.20			1.04
H				23.68		H			30.33
M1 L		19.93		20.21	1.01	M1 L			22.35
W						W			9.74
H						H
M2 L		20.00		21.39	1.07	M2 L			25.85
W				17.40		W			12.50
H				15.99		H			26.32
M3 L				14.00		M3 L			24.26
W				12.16		W			12.61
H				15.22		H			23.48

^*Asterisk indicates estimated measurement.

¹Ratios quantifying male-to-female tooth size dimorphism are provided when teeth at the same position can be compared. Median dimorphism in canine size, based on upper canines, is 1.20, meaning males have canines on the order of 20% larger than those of females. Median dimorphism in premolar and molar size is 1.04, meaning that males have premolars and molars only about 4% larger than those of females.