Novrana

Novrana is a genus of extinct cartilaginous fish that lived during the Carboniferous period. These ancient sharks are primarily known from fossilized teeth and fin spines, which are often found in marine sedimentary rocks. The teeth of Novrana are typically small and triangular, with serrated edges, suggesting a diet of smaller prey. Their fin spines were likely used for defense and possibly for stabilizing their bodies during swimming.

The exact phylogenetic placement of Novrana within the shark family tree is still debated by paleontologists. Some studies suggest a close relationship to the modern-day sharks, while others place them in a more basal position within the Chondrichthyes, the class that includes all cartilaginous fishes. The fossil record indicates that Novrana inhabited shallow marine environments, likely near coastlines.

Fossils attributed to Novrana have been discovered in various locations around the world, including North America and Europe. The limited nature of the fossil remains, often consisting of isolated teeth and spines, makes it challenging to reconstruct a complete picture of their anatomy and lifestyle. However, the existing evidence points to Novrana as a common component of Carboniferous marine ecosystems, contributing to the diversity of ancient shark populations. Further discoveries of more complete fossil specimens would be crucial for a more definitive understanding of this prehistoric genus.