Named By: Susan Turner and Carole J. Burrow - 2011.
Classification: Chordata, Chondrichthyes, Elasmobranchii, Euselachii, Xenacanthida, Diplodoselachidae.
Species: R. morris (type).
Size: Estimated at one meter long.
Known locations: Australia - Ducabrook Formation.
Time period: Visťan of the Mississippian stage of the Carboniferous.
Fossil representation: Teeth.
is an interesting find as the xenacanthid sharks are often associated
with just Europe and North America, although remains are also known
from India. With Reginaselache being discovered
in Australia it would
seem that the xenacanthids were possibly widespread across all the
major continents. Xenacanthid sharks like Reginaselache
eel-like in body form rather than the fusiform (fish-like) sharks
that we know today. This form would have allowed Reginaselache
navigate swamps full of submerged obstacles without getting its fins
As a predator Reginaselache probably hunted other fish, but fossil remains for another xenacanthid shark named Triodus suggests that it may have taken juveniles of temnodspondyl amphibians as well. Still in their larval stages these juveniles would have possibly been restricted to life in the water until they grew older and changed so that they could walk on land where they would have been safe from sharks like Reginaselache.
- A Lower Carboniferous xenacanthiform shark from Australia. - Journal of Vertebrate Paleontology. 31 (2): 241–257. - Susan Turner & Carole J. Burrow - 2011.