Bony Fishes
Former Answer by some dummy: "The most diverse group is insects, which belong to the group ARTHROPODA*.*Arthropoda-Largest and most diverse animal phylum, mostly insects."This answer is completely wrong based on the question.Arthropods are invertebrates! They are the most numerous INvertebrates.The most diverse vertebrates are BONY FISH.
Amphibians
Cnidarians are the most diverse group.
bony fishes
bony fishes
bony fishes
The Arthropods are the largest and most diverse.
Reptiles
Mammals are most familiar vertebrates .
group 1A
a) jawless fishes.
Dinosaurs are a diverse group of animals that were the dominant terrestrial vertebrates for over 160 million years.! :)Thank you.