1 / 3

Overview of Vertebrate Evolution: From Jawless Fishes to Early Craniates

This lecture delves into the fascinating evolution of vertebrates, highlighting key features such as bones, fins, gills, and jaws. It introduces early craniates, which include jawless fishes and ostracoderms, leading to the emergence of jawed craniates. The evolution of jaw structures as hinged, bony feeding mechanisms is explained, along with discussions on the surviving jawless fishes, hagfishes and lampreys, and the earliest jawed fishes known as placoderms. Gain insight into the evolutionary milestones that shaped vertebrate diversity.

saxon
Télécharger la présentation

Overview of Vertebrate Evolution: From Jawless Fishes to Early Craniates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lecture 6ANIMAL EVOLUTION: THE VERTEBRATES

  2. Features of vertebrates • Bones (vertebrae) • Have fins • Gills • Jaws

  3. Early craniates • Craniates are animals with cranium • E.g. fishes, amphibians, reptiles, birds and mammals. • Jawless fishes & ostracoderms evolved. • Then jawed craniates evolved. • Jaws – hinged, bony feeding structures. • Hagfishes & lampreys – the only surviving jawless fishes. • Placoderms - earliest jawed fishes.

More Related