euselachii

Example:The euselachii fossils are often used to study the early evolution of chondrichthyans.

Definition:A group of jawed fishes that include sharks, skates, and rays, characterized by their cartilaginous skeletons.

Example:Euselachii lived during the late part of the Devonian period, alongside other prehistoric fish.

Definition:A geologic period during the Paleozoic era, extending from about 419.2 to 358.9 million years ago, characterized by the appearance of diverse marine life and early land plants.

Example:Euselachii were known for their cartilaginous structure, which was more primitive compared to modern sharks.

Definition:A framework composed of cartilage, a flexible but rigid connective tissue lacking bone cells and a mineral matrix.