Table 2. Developmental events used in this study.
| Number | Event |
|---|---|
| 1 | Primary optic vesicle |
| 2 | Otic placode |
| 3 | Allantois bud (small thick-walled out-pouching) |
| 4 | Torsion complete |
| 5 | Secondary optic vesicle |
| 6 | Hyomandibular slit |
| 7 | Allantois vesicle (thin-walled bag) |
| 8 | Choroid fissure open (horseshoe-shaped) |
| 9 | Limb ridge |
| 10 | Allantois contacts chorion (allantois flattened above embryo like umbrella) |
| 11 | Maximum pharyngeal slits |
| 12 | Limb Apical Ectodermal Ridge (AER) |
| 13 | Hemipenal buds form on cloacal lip |
| 14 | Three-segmented limb (stylo-, zeugo-, autopodium) |
| 15 | Jaw initiated |
| 16 | Eyelid forms as a thin ribbon-like sheet of tissue overlapping the eyeball |
| 17 | Pharyngeal slits closed |
| 18 | Digits differentiated in limb paddle |
| 19 | Jaw complete; mandible meets tip of maxilla |
| 20 | Scale anlagen visible |