Typothorax and other aetosaurs possess small, leaf-shaped teeth that were unsuited for a diet consisting of meat.

The largest known specimen of T. coccinarum, described in 2023, would have been similar in size to Desmatosuchus, measuring over 5 metres (16 ft) long, though it has been identified as a skeletally immature individual (16 to 19 years old) based on the open neurocentral suture and the lines of arrested growth.

However, the authors warn that, since smaller individuals have co-ossified neurocentral sutures, they may not be a reliable factor in determining maturity in aetosaurs.

If the cervical spikes of Typothorax are homologous to those of Desmatosuchus, it is likely that rows of osteoderms were removed from the front.

Unlike all other aetosaurs, Typothorax possesses spiked osteoderms on the underside of the tail, near the cloaca.

Paleontologists have found the characteristic armor plates for decades,[6][7] but only recently has a comprehensive study of Typothorax appeared.

Like all aetosaurs and many other early crurotarsans, Typothorax had erect hindlimbs held beneath the body.

Because the length of the femur is almost equal to that of the tibia and fibula (lower leg) and astragalus and calcaneum (ankle), Typothorax was probably slow-moving.

Heckert et al. (2010) concluded that Typothorax was not specifically adapted for a fossorial lifestyle but had an ability to dig that other aetosaurs didn't have.

[4] The upturned snout of Typothorax and other aetosaurs suggests that they may have searched for food by rooting around in soil.