the bothriolepis maxima is an extinct species of armored fish that lived during the devonian period

ammonitoceras cretaceous europe transcaspian dumas ancyloceratidae spiral complex ribs spines tubercles shells sediments biostratigraphy ammonite evolution extinct geology nautilus paleontology remote swirl animal fossil dinosaur fish jurassic archaeological site archeology skeleton limestone macro prehistoric petrified rock aquatic creature fragment arthropod biology exoskeleton marine pectoral mouth underside head used suck small animals meters long weighed 100 kilograms north america 360 million years placoderms