Table 1.

Length measurements for humeri and femora histologically sampled in this paper

Specimen	Age	Taxon	Humerus L, mm	Femur L, mm	Adult length, %
LACM 129639m	Mother	P. latipinnus	476	501	100
LACM 129639f	Fetus	P. latipinnus	*	*	32 (based on other elements)
FMNH PR 1619	Small	Polycotylidae	150	*	29
	Juvenile
UNSM 55810	Juvenile	D. bonneri	208	*	40
UNSM 50133	Adult	D. bonneri	516	516	106