First creatures to lay eggs

[Dory]

I assume it was the dinosaurs...but I can't find any info as far as the history and evolution of the egg. help?

[Pappa]

Fish?

[Dory]

Fish?

Eggshells eggs. Calcium carbonate sort

[Pappa]

Fish?

Eggshells eggs. Calcium carbonate sort

Dino eggs were leathery ( think). So yes, I expect it would be dino eggs that were the first hard shelled eggs... seeing as birds are really just dinos anyway.

[Dory]

Fish?

Eggshells eggs. Calcium carbonate sort

Dino eggs were leathery ( think). So yes, I expect it would be dino eggs that were the first hard shelled eggs... seeing as birds are really just dinos anyway.

Right...it seems that holds water (excuse this overused pun) amongst large animals. I think insects were the first though. I presume that land animals eggs evolved to contain more fluids and water as opposed to fish eggs? It seems to make sense but I'm looking for evidence and references.

[Pappa]

Fish?

Eggshells eggs. Calcium carbonate sort

Dino eggs were leathery ( think). So yes, I expect it would be dino eggs that were the first hard shelled eggs... seeing as birds are really just dinos anyway.

Right...it seems that holds water (excuse this overused pun) amongst large animals. I think insects were the first though. I presume that land animals eggs evolved to contain more fluids and water as opposed to fish eggs? It seems to make sense but I'm looking for evidence and references.

Marine arthropods came before insects, and they laid eggs.

[Dory]

Fish?

Eggshells eggs. Calcium carbonate sort

Dino eggs were leathery ( think). So yes, I expect it would be dino eggs that were the first hard shelled eggs... seeing as birds are really just dinos anyway.

Right...it seems that holds water (excuse this overused pun) amongst large animals. I think insects were the first though. I presume that land animals eggs evolved to contain more fluids and water as opposed to fish eggs? It seems to make sense but I'm looking for evidence and references.

Marine arthropods came before insects, and they laid eggs.

Right...okay, I think I got this thing mapped. Any more info and I'm the world first eggologist.

[Svartalf]

Fish?

Eggshells eggs. Calcium carbonate sort

Then it would have been reptiles from the Carboniferous era, long before there were proper dinosaurs... with luck, it might even have happened with Devonian early land dwellers (early reptiles or not-quite reptiles evolved from amphibians).

[Gawdzilla Sama]

Fish?

Eggshells eggs. Calcium carbonate sort

Then it would have been reptiles from the Carboniferous era, long before there were proper dinosaurs... with luck, it might even have happened with Devonian early land dwellers (early reptiles or not-quite reptiles evolved from amphibians).

"The fish that walked" would continue to lay eggs. Probably in pools at first, but the successful ones would be the ones that didn't need the pools for their eggs to survive, probably by a process of surviving when the pools dried up. The "winners" in that contest would trend toward "no pool" laying. SWAG off.