Bransonella is an extinct genus of marine Xenacanth which lived during the Paleozoic era.

[3] It is known only from teeth which are easily distinguished from related genera by ornamentation on the cusp shaped like an inverted "V" and fin spines Teeth attributed to this genus are small, no greater than 2 millimeters.

This suggests a small body size likely not exceeding a meter in length.

B. nebraskensis was described from the late Pennsylvanian of Nebraska and later recognized from the middle Mississippian to the early Permian of Kansas, the Urals, Poland, Belgium, Russia, and England.

Additional reports of this genus come from the Mississippian of China and Australia as well as the Pennsylvanian of Hungary and Brazil.