Table 1.

List of specimens examined in this study

Species common name	Species scientific name	No.	CRL (mm)	Age/remark	Section	Staining
Eastern quoll	Dasyurus viverrinus	MS 138	5.45	Newborn	10 μm, longitudinal	H & E
		MS 138(B)	5.45	Newborn	5 μm, transversal	H & E
		MS134	5.5	Newborn	10 μm, coronal	H & E
		MS134(B)	5.5	Newborn	5 μm, transversal	H & E
Grey short‐tailed opossum	Monodelphis domestica	337*	10	Newborn	10 μm, transversal	Azan
Brushtail possum	Trichosurus vulpecula	MS288	14.5	Recently born	15 μm, coronal	H & E
		MS289	15	Newborn		H & E
		MS290	15.5	Newborn		H & E
Southern brown bandicoot	Isoodon obesulus	MS219	15	Newborn	10 μm, coronal	Azan?
Long‐nosed bandicoot	Perameles nasuta	MS482 (A)	11	Late‐stage embryo	7 μm, transversal	H & E
		MS216	14	Newborn	Sagittal	H & E
		MS218	15	Newborn	10 μm, coronal	H & E?
Koala	Phascolarctos cinereus	MS351	17	Newborn	Coronal	H & E
		MS352	18	Newborn	Coronal	Azan?
		MS353	16.5	Newborn	Coronal	H & E
Long‐nosed potoroo	Potorous tridactylus	MS492a		Newborn	6 μm, transversal	H & E
Brush‐tailed rock wallaby	Petrogale penicillata	MS484	19‐20	Newborn	7‐8 μm, transversal	H & E
		MS448	20	Newborn	7 μm, transversal	H & E
Red‐necked pademelon	Thylogale thetidi	MS408	17	About to be born	Transversal	H & E
Black‐striped wallaby	Macropus dorsalis	MS407	16.5	Late‐stage embryo	Sagittal	H & E
Platypus	Ornithorhynchus anatinus	M44	16.75	Newly hatched	10 μm, coronal	Azan
Golden hamster	Mesocricetus auratus	14*	30	Newborn	10 μm, transversal	H & E

All other specimens were available from the Hubrecht & Hill collection.

*Specimens of M. domestica and Mesocricetus auratus are available from the author's PhD.