Cladistically, this groups "Ossinodus" with "Whatcheerids" and "Pederpes". The clavicle and interclavicle are also ornamented with deep pits, the same kind of ornamentation that decorates the dermal cranial bones. Similar to "Ichthyostega" and other tetrapods, their neural spines are “squared-off dorsally” with the anterior and posterior margins of the lateral faces of the intercentrum rolled outwards and enlarged pleurocentrum. Their neural spines stand upright and the prezygapophysis are shorter than their postzygapophysis. Like most primitive tetrapods, the abductor blades of the femur protrude distally, with a groove separating it from the from the femoral head. Length and thickness depend on the size of the creature. Their tibias are broad, flat, and less waisted. The humerus is covered by numerous asymmetrical pits. The most famous "Ossinodus" bone is the fractured radius. Along the edge of the extensor and flexor surfaces, there are prominent ridges that are found in early tetrapods. Likewise with "Acanthostega, Pederpes", and "Ichthyostega", the radii are shorter in length and less waisted. The ornamentation and pits found on specimen bones are sites of individual muscle attachment. There is a fractured right radius of a particular specimen that shines light onto early tetrapod habitualization. A broken radius found among the "Ossinodus" remains in Australia suggests they must have spent a significant portion of their time on land. Through finite force analysis, the amount of force necessary to acquire the damage found on the bone is only possible from a fall of a certain height. It is unsure if "Ossinodus" were mainly aquatic or terrestrial, but it is safe to say that they spent time both in water and on land. Ossification along the fracture point marks one of the earliest signs of bone healing in early tetrapods. The healing process produced a callus near the proximal end. Early tetrapods were known to spend most of its time in water, with just their heads poking out. However, the “axis of trabecular alignment” on the fractured radius, analyzed through CT scan, lies almost parallel to the bone’s long axis. This alignment suggests that the radius was constantly remodeling as a response to supporting a heavy load.