I think they are called AMBER FOSSILS
it is the old amber, look under ground.
Neither the Helix Fossil nor the Dome Fossil will become an aerodactyl. In order to obtain an aerodactyl you must revive a pokemon from the Old Amber item which can be obtained in the Pewter City Museum.
You can't catch Aerodactyl you have to get its fossil at the Pewter City Museum (it's called Old Amber) then bring that fossil to Cinnabar Island where they'll give you the Aerodactyl.
Actually, you can catch Aerodactyl in the wild in Route 111 and Mirage Tower. It is a wild encounter, it is not in fossil form, it is in the wild.
In Pokemon LeafGreen, the Dome Fossil can be revived into Kabuto, and the Helix Fossil can be revived into Omanyte.
you can get aerodactyl once you get the national dex and beat the Pokemon league. just go mining once you have done those and you should come up with different fossils. One of them should be the aerodactyl fossil. I forget which one it was but i't's there
No people Aerodactyl doesn't evolve hes just a very old fossil that doesn't evolve.
Answer:If you mean in Pokemon, there is no other fossil like it, and it becomes an aerodactyl.
Aerodactyl
Take it to Cinnabar Island go into the lab give the guy the fossil leave come back and then you will get an Aerodactyl
Im pretty sure you dont catch aerodactyl in heartgold but I think you can get him as a fossil, if you do, talk to the guy in the pewter city mueseum and he will turn it into aerodactyl for you.
Dome fossil is Kabuto and Old Amber is Aerodactyl.