Turvakihi

Turvakihi is a genus of extinct cartilaginous fish that lived during the Devonian period. Fossil evidence suggests these creatures were a type of shark, though they possessed some unique characteristics that set them apart from modern sharks. The name "turvakihi" is derived from the Maori language, reflecting the location where some of the earliest significant fossils were discovered.

These ancient sharks are primarily known from fragmented remains, including teeth and fin spines. Their teeth were generally small and blade-like, suited for slicing through their prey. The fin spines, a common feature among some ancient shark lineages, likely provided structural support and defense. Analysis of the fossil record indicates that turvakihi inhabited marine environments, likely coastal or shallow water regions.

The exact evolutionary relationships of turvakihi are still a subject of ongoing research. They are often classified within the broader group of paleospinaciforms, an order of extinct sharks. Studying turvakihi provides valuable insights into the early diversification of sharks and the complex marine ecosystems of the Devonian. The limited fossil material presents challenges in fully understanding their anatomy, behavior, and ecological role.