You can get the Tricera head fossil when the Secret Tunnel becomes available. Keep talking to the Info Clerk in the fossil guild. When he mentions "mysterious holes appearing in Rivet Ravine," that means the entrance to the Secret Tunnel is open.
You find it at BB Base.
You can find a Paraloph head fossil in Fossil Fighters by searching the Jungle Labyrinth in the Greenhorn Plains area. Look for dig spots and use your hammer to unearth fossils. Keep exploring the area until you find the Paraloph head fossil.
you have to get 50 donation points
in the bb base lol
in the pay-to-dig site
you can find it at hot spring heights
It is in Rivet Ravine. I believe it is rare because I have the head fossil and it is rare. :)
You find it in Rivet Ravine. Hope I helped! :)
up your but & around the corner
at hot spring heights
fist of all the dinosaur is lambeo and u can find his head in rivet ravine area 2
just dig where you found its head at