From: Mechanisms underlying dual effects of serotonin during development of Helisoma trivolvis(Mollusca)
Stage name | Stage after Meshcheriakov | Stage,% | Size, mm | |
---|---|---|---|---|
(min - max) | ||||
Trochophore | Early | 19 | 20 | 0.16 – 0.19 |
Middle | 20 | 25 | 0.20 – 0.24 | |
Late | 21 | 30 | 0.25 – 0.31 | |
Veliger | Early | 22 | 35 | 0.32 – 0.40 |
Middle | 23 | 45 | 0.41 – 0.47 | |
Late “hippo” | 24 | 55 | 0.48 – 0.56 | |
Metamorphic | Veliconcha | 25 | 65 | 0.57 – 0.61 |
26 | 75 | 0.62 – 0.66 | ||
27 | 85 | 0.67 – 0.72 | ||
Adult-like | 28 | 90 | 0.73 – 0.78 | |
29 | 100 | 0.74 – 0.79 |