Fossil Ore:

This ore generates at around [Y] level 60 in every biome. At the beginning level, you'll find the most recent fossils, Cenozoic and you'll have to dig deeper to find older fossils. This is the first step into creating flora and fauna. 

So far, here's all the flora and fauna fossils you can find: Dilophosaurus,  Dodo , Nautilus, Stegosaurus, Velociraptor, Coelacanth, Pteranodon, Triceratops, Spinosaurus, Plesiosaurus, Brachiosaurus, Mosasaurus, Scale Tree, Tall Cycad, and Montsechia.

Permafrost:

This ore allows you to collect DNA from more recently dead organisms. You can get Dodo bones, Smilodon bones, and frozen meat.

Sifter:

This machine will sort out gravel,  Unknown Fossils, and dirt to try and get useful stuff out of them.  It might not always work. You can craft it with a crafting table, light grey carpet, and a Unknown Fossil. 

To start making your creature or plant, you'll need machines to create them.

First, you'll need to make some needles, syringes and storage disks:

Then, to get the DNA out of the Fossil, you'll need to make a Extractor.  You can make it with seven smooth stones, a piece of redstone, and a syringe. 

Once you've made the Extractor, you need to extract the DNA into a Storage Disk, then level it it until you take out the DNA and put it in a syringe. 

You can also use flesh and bones bones to "resurrect" your dead creatures. Flesh will give you full DNA and bones will give you nearly complete DNA. 

Finally, to make the eggs, you need to craft a Cultivator. You can make a Cultivator with 6 smooth stone and a glass in the middle.

Lastly, take the DNA and combine it with a chicken egg. That's how you get most creature eggs! Place it down, and the egg will hatch in between five to ten minutes. 

For plants and mammals, place the DNA into the Cultivator. It will give you a plant or embryo, depending on what on put in the Cultivator. With embryos, inject it into a cow or pig, and a new mammal will be born!

Here's everything you need to know on keeping your creatures happy:

You can have a creature free roaming or follow you by interacting with them with their tame item.

Creaturepedia: (mostly functional)

You can use the Creaturepedia to learn about your creature. It tells you about mood, life stage, diet, hunger, health, and some facts. It can be made with a Unknown Fossil and a book.

Feeders: (mostly functional)

To prevent your creatures from starving and attacking anything that could be food, you can make a Feeder to help the creature's needs. It can be crafted with a bucket, glass, iron, redstone, and stone. You can fill it up with any raw food until it's completely full.

MedStation: (mostly functional)

Over time, your creatures will get sick. Create the MedStation, and use your creature's infected blood to create vaccines to treat them.

Creative Node:

If you don't want to worry about hunger or disease, you can use the Creative Node to get rid of that entierly. You can make your creature go back to survival at any time. Only avaliable in creative mode.

ToothSpear and Fossil ToothSpear:

The ToothSpear has 6 attack damage with 250 durability.  The Fossil ToothSpear has 5 attack damage with 500 durability.  They can be crafted with two sticks and a tooth.

Frozen Meat:

The frozen Dodo meat is not that good of a weapon but has high durability. You can find it in Permafrost. You can also melt it in a furnace to get raw Dodo meat.

Thagomizer Swords:

The Thagomizer Sword and the Fossil Thagomizer Sword are similar in durability compared to the ToothSpears. The Thagomizer Sword has 10 attack damage, and the Fossil Thagomizer Sword has 8 attack damage.

Sickle Swords:

The Sickle Swords are also similar to the ToothSpears when compared to durability. The normal Sickle Sword has 5 attack damage and the Fossil Sickle Sword has 4 attack damage.

Horn Sword:

The Horn Sword is one of the strongest weapons in the addon, only being behind the Thagomizer Swords. The normal Horn Sword has 8 attack damage and 200 durability, but the Fossil Horn Sword has 7 attack damage and 500 durability.

Sabre Knives:

The Sabre Knife does 6 attack damage with 200 durability and the Fossil Sabre Knife does 5 attack damage with 500 durability.

Reinforced Crossbow:

The Reinforced Crossbow does little damage because it is meant to tranquilize creatures. It shoots Tranquilizer Darts and charges faster than a normal Crossbow. 

Bone and Fossil Armor:

The Bone Armor has protection points similar to Iron Armor and 200 durability. The Fossil Armor has 500 durability, but less protection. It can be crafted similarly to the Bone Armor.

Wing Suit:

The Wing Suit has 1 protection point and 200 durability.  It can help you glide far distances with the Pteranodon Orb. 

Pteranodon Orb:

Using this magical item will grant you levitation for 30 seconds. It works like food and can be crafted with 8 lapis and 1 Pteranodon fossil.

Volcanic Blocks:

Electric and Metal Fences:

Paddock Signs:

Dino legs:

Dino ribs:

Stegosaurus Feet:

Volcanic Bricks:

Cracked Volcanic Bricks:

Smooth Volcanic Rock:

Chiseled Volcanic Rock:

Electric and Metal Fences:

Paddock Signs:

You can use any type of fossil.