| Pedunculate barnacles, with fleshy stalks, suffer from reduced preservational potential. |
|
| Or is it simply a preservational artifact, where aetosaur bones are less likely to be preserved in the younger rocks? |
|
| Rates of sediment accumulation, differential bioturbation and preservational processes may also have influenced the final diversity of fossils in the rocks. |
|
| Most living demosponges have skeletons of unfused spicules, although due to preservational effects, the fossil record of demosponges is mostly of fused forms. |
|
| In contrast, the Mount Cap microfossils from both outcrop and subsurface horizons are truly exceptional in terms of preservational quality and paleobiological significance. |
|
