Key resources table.

Reagent type (species) or resource	Designation	Source or reference	Identifiers	Additional information
Mouse (Mus musculus)	Longshanks 1	Campbell Rolian	LS1	Stock: HSD:ICR
Mouse (Mus musculus)	Longshanks 2	Campbell Rolian	LS2	Stock: HSD:ICR
Mouse (Mus musculus)	Control	Campbell Rolian	CTL	Stock: HSD:ICR
Software, algorithm	R, R packages geomorph, Morpho, RRPP	R Development Core Team, 2020, Schlager, 2020, Collyer and Adams, 2018, Adams et al., 2020	n/a
Software, algorithm	Amira	Visage Imaging, Berlin, Germany	Version 5.4.2
Software, algorithm	Python and Bash (Medical Imaging NetCDF library)	Percival et al., 2019, Devine et al., 2020	Python 3.6 Bash-5.1 MINC 2.0	https://github.com/BIC-MNI/minc-toolkit-v2 https://github.com/jaydevine/Landmarking
Other	Haematoxylin (for Weigert’s)	Sigma	H3136	Histological stain
Other	Iron (III) chloride (for Weigert’s)	Sigma	157740	Histological stain
Other	Fast Green (FCF)	Sigma	F7252	Histological stain
Other	Safranin-O	Sigma	S2255	Histological stain
Other	Gill’s Haematoxylin	Sigma	GHS332	Histological stain
Other	Eosin Y	Sigma	588X	Histological stain