Reply to discussion of “Defining the morphological quality of fossil footprints. Problems and principles of preservation in tetrapod ichnology with examples from the Palaeozoic to the present” by Marchetti et al. (2019)

1. Marchetti, L.
2. Belvedere, M.
3. Voigt, S.
4. Klein, H.
5. Castanera, D.
6. Díaz-Martínez, I.
7. Marty, D.
8. Xing, L.
9. Feola, S.
10. Melchor, R.N.