Table 2.

Sequence of cranial bones appearance in larval Pleurodeles waltl reared under different hormonal conditions

Sequence position	Controls	T3 1 ng mL‐1	T3 2 ng mL‐1	TU 0.02%
1	coronoid	coronoid	coronoid	coronoid
2	vomer	vomer	vomer	vomer
3	palatine	palatine	palatine	palatine
4	dentary	dentary	dentary	dentary
5	squamosal	squamosal	squamosal	squamosal
6	premaxilla	premaxilla	premaxilla	premaxilla
7	parasphenoid	parasphenoid	parasphenoid	parasphenoid
8	pterygoid	pterygoid	pterygoid	pterygoid
9	prearticular	prearticular	prearticular	prearticular
10	frontal	frontal	frontal	frontal
11	parietal	parietal	parietal	parietal
12	exoccipital	maxilla	maxilla	exoccipital
13	quadratojugal	exoccipital	$\left[\begin{array}{c}\text{exoccipital}\\ \text{quadratojugal}\\ \text{orbitosphenoid}\end{array}\right]$	quadratojugal
14	orbitosphenoid	quadratojugal		orbitosphenoid
15	prootic	orbitosphenoid		prootic
16	maxilla	nasal	nasal	quadrate
17	nasal	$\left[\begin{array}{c}\text{prootic}\\ \text{prefrontal}\\ \text{os thyroideum}\\ \text{quadrate}\end{array}\right]$	prefrontal	os thyroideum
18	os thyroideum		prootic	maxilla
19	prefrontal		os thyroideum	prefrontal
20	quadrate			nasal