YPM.1206.B | TMP | TMP | TMP | |
---|---|---|---|---|
Hesperornis regalis | 1989.103.0025 Richardoestesia isosceles | 1986.052.0054 “Aves indet.” | 1986.030.0039 “Aves indet.” | |
Mean tooth formation duration (days) | 66 | 74 | 62 | 88 |
Angle I (°) | 91.6 | 95.46 | 100.23 | 107.3 |
Angle D (°) | 3.68 | 7.16 | 8.4 | 5.6 |
d = DSR (daily secretion rate) (μm/day) | 3.1 | 3.5 | 3.5 | 3.1 |
Tooth extension rate at the cervix level (μm/day) | 48.2 | 28.06 | 23.9 | 31.1 |