Feathers vs Scales vs Pycnofibres vs Skin

A chart composed of various prehistoric animals with direct evidence of their skin coverings, ranging from Yi qi to Corythosaurus.

Important Notes:
-It is debated if Dilophosaurus had feathers due to a possible feather impressions in squatting track fossil in 1997.
-The skin impressions of Attenborosaurus were destroyed in WWII.
-The skin impressions of Estemmenosuchus were recorded by Chudinov in 1965. These skin impressions have not been photographed and have almost no internet presence.
-The tail fluke impression of Platecarpus exists but it does not preserve if it had skin or scales.

Original Image Credit:
Matt Martyniuk
John Conway
www.prehistoric-wildlife.com/
Traheripteryx
Dmitry Bogdanov
Ville Sinkkonen
Nobu Tamura
ArthurWeasley

Sources: 
www.ncbi.nlm.nih.gov/pmc/artic…
www.nature.com/nature/journal/…
markwitton-com.blogspot.com/20…
rspb.royalsocietypublishing.or…
www.bioone.org/doi/abs/10.1666…
www.ncbi.nlm.nih.gov/pmc/artic…
www.nature.com/nature/journal/…