| Group | Group abbreviation | Developmental stages | Size (length or weight) | External morphological features |
---|---|---|---|---|---|
Embryos | Early embryos | EE | 0-15 | ≤ 400 μm | *No visible eyes *Very slight body pigmentation |
Intermediate embryos | IE | 16-18 | 400-800 μm | *Developing eye spots in many individuals *Pigmented bodies | |
 | Late embryos | LE | 19-20 | > 800 μm | *Developed eye spots in all individuals *Highly pigmented bodies |
Larvae | First instar larvae | L1 | 1st larval | ≤ 0.2 mg | 0-24 hours old |
L1 early | ≤ 6 hours old | ||||
 |  | L1 late |  |  | ≥ 15 hours old |