Training Module 5 Which category best describes your fossil? 1. Isolated teeth 2. Jaws and tooth plates 3. Vertebrae 4. Scales, shells, and plates 5. Bones and bone fragments Try again! Scales, shells, and plates usually have broad surfaces that are flat or bumpy.Try again! Jaws and tooth plates usually have rows of teeth or sockets for teeth that fell out.Try again! Vertebrae usually have circular cups at their ends and struts that stick out along the rim.Try again! Bone fragments usually have broken cross sections that look like a hollow tube or like the end of a broken pencil. ID Sheet 4 1. My fossil may have a pointed top or a rounded top. 2. My fossil has an irregular shape with multiple cusps. 3. My fossil is shaped like a diamond. 4. My fossil is shaped like a flat triangle and may have tiny serrations. 5. My fossil is shaped like a hexagon and has two thick roots. ID Sheet 4 A 1. My fossil is tall with a pointed top. 2. My fossil is short with a rounded top. 3. My fossil is shaped like a triangle, has one straight tip, and no roots. 4. My fossil is shaped like a triangle, has one curved tip, and no roots. Try again! Your fossil should have a single point and no roots.Try again! Focus on the top of your fossil. It should have a one sharp tip.Try again! Look at your fossil from the bottom. The base should be shaped like a circle with small struts that stick out along the edges.Try again! Your fossil should be wider at the base and pointed at the top. You did it! You found a skin denticle from the ray Myledaphus! 1 – Skin denticles look like teeth, but they are actually scales that cover the body of sharks and rays! 2 – In modern sharks and rays, the skin denticles point towards the tail. 3 – This causes their skin to feel smooth in one direction and rough in the other. Place your fossil in the correct box on the Fossil Training Sheet. Click here to identify another microfossil. Try again! Turn the fossil around and note the shape of ridges running up and down. The ridges that run up and down should flare outward near the bottom.Try again! The tip of your fossil should be pointy.Try again! The tip of your fossil should have a slight curve.