Table 1 Sampled taxa and microscopic teeth character described for individual specimen
Species | Enamel feature (Terminology follows that in Hwang 2005) | Enamel Thickness (μm) | Crown height (μm) | Ratio (Enamel thickness/Crown height) | Interglobular porous mantle dentin | Inferred diet/feeding ecology | Imaging method | |
|---|---|---|---|---|---|---|---|---|
Indet. Ornithurine (IVPP V 14606) | Simple parallel crystallite | 6.5 | 1119 | 0.58% | Absent | Herbivorous | μCT/SEM/TXM | |
Indet. Enantiornithine (IVPP V 16041) | Columnar enamel | 6.2 | 346 | 1.8% | Absent | Insectivore | SEM/TXM | |
Longipteryx chaoyangensis (IVPP V 21702) | Columnar enamel with Crystal bundle and microunits | 50.0 | 1260 | 4% | Absent | Piscivore | μCT/SEM/TXM | |
Sapeornis changyangensis (IVPP V 13759) | Columnar enamel, with partially converging crystallite | 21.0 | 1631 | 1.3% | Absent | Seeds/ herbivorous | SEM/TXM | |
Jeholornis prima (IVPP V 13886) | Simple paralleled, poorly defined structure, appeared to have a few incremental lines | 7.0 | 2956 | 0.2% | Absent | Seeds/ herbivorous | μCT/SEM | |
Microraptorine 1 and 2 | Stm 5–151 | Parallel crystallite enamel, with a few incremental lines close to the surface | 11.1 |  |  | Present | Carnivorous: lizard, bird, small animals | SEM/TXM |
Stm 5–48 | Thin parallel crystallite | 7.1 |  |  | Absent | ? | SEM/TXM | |
Troodontid sp. | Parallel crystallite | 26.3 | Â | Â | Present | General carnivorous | SEM/TXM | |
Anchiornis huxleyi (Stm 0–69) | Parallel crystallite | 14.3 |  |  | Present | Carnivorous: Lizard, fish,/opportunistic feeders | SEM/TXM | |