Like most derived caseids it had paddle - like limbs and osteoporotic bones , indicating adaptations for an aquatic lifestyle .
These adaptations indicate that Casea was a herbivore , feeding on relatively tough plants , such as ferns .
Like most derived caseids Casea had paddle - like limbs and osteoporotic bones , indicating adaptations for an aquatic lifestyle .
These adaptations indicate that Casea was a herbivore , feeding on relatively tough plants , such as ferns .