Isochirotherium and Erythrosuchus

Among the many Triassic tracks made by archosaurs, only one ichnogenus impresses digits 2 and 3 longer than the others and subequal to each other. Lucky for us, among all the many Triassic archosauriform genera only erythrosuchids match that pattern. Case closed?

Erythrosuchus matches Isochirotherium

Figure 1. Erythrosuchus matches Isochirotherium (Haubold 1971, Klein and Haubold 2007) and provides data on the manus, which is otherwise lacking.

Data from the manus impression provides the only data known for the manus of erythrosuchids that I am aware of.


Figure 2. Erythrosuchus

As always, I encourage readers to see specimens, make observations and come to your own conclusions. Test. Test. And test again.

Evidence and support in the form of nexus, pdf and jpeg files will be sent to all who request additional data.

Broom R 1905. Notice of some new reptiles from the Karoo Beds of South Africa. Records of the Albany Museum 1: 331–337.
Haubold H 1971. Handbuch der Paläoherpetologie [Encyclopedia of Paleoherpetology]. Part 18. Ichnia Amphibiorum et Reptiliorum Fossilium. Gistav Fischer Verlag, Stuttgart 1-124.
Huene F von. 1911. Über Erythrosuchus, vertreter der neuen reptilordnung Pelycosimia. Geologische und Paläontologische Abhandlungen, N.F. 10: 67–122
Klein H and Haubold H 2007. Archosaur footprints – Potential for Biochronology for Triassic Contiental Sequences. In Lucas SG and Spielmann JA eds. The Global Triassic. New Mexico Museum of Natural History Science Bulletin 41. 120-130 online pdf


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.