Table 1. List of the hadrosaurid membrane bones thin-sectioned and examined in this study.
| Taxon | Specimen no. | Ontogenetic stage | Element | Length (rosto-caudal) (cm) | Formation and locality |
| Hadrosauridae indet. | MOR 1038 | embryonic | Surangular | 2.1 | Judith River: JR-144Q |
| Hypacrosaurus stebingeri | MOR 559 | embryonic | Dentary* | 5.1 | Two Medicine: TM-066 |
| Hypacrosaurus stebingeri | MOR 559 | embryonic | Frontal | 3.6 | Two Medicine: TM-066 |
| Hypacrosaurus stebingeri | MOR 559 | embryonic | Maxilla | 5.0 | Two Medicine: TM-066 |
| Hypacrosaurus stebingeri | MOR 559 | embryonic | Parietal | 3.2 | Two Medicine: TM-066 |
| Maiasaura peeblesorum | MOR-YMP430.Sa | embryonic | Surangular | 1.7 | Two Medicine: TM-160 |
| Hypacrosaurus stebingeri | MOR 548 | post-hatching (in [20]) | Dentary* | 9.0 | Two Medicine: TM-066 |
| Hypacrosaurus stebingeri | MOR 548 | post-hatching (in [20]) | Maxilla* | 8.8 | Two Medicine: TM-066 |
| Hypacrosaurus stebingeri | MOR 548 | post-hatching (in [20]) | Surangular* | 4.1 | Two Medicine: TM-066 |
(The asterisks designate bones that had remnants of SC)