Beetles have more diversity among them than do any other group of animals.
Phylum Arthropoda with 1 000 000 species
Arthropoda has the most.
rhizopods
Worms make up the largest group of complex invertebrates.
Yes insects can be said to form the largest group of invertebrates with about a million species described and possibly several millions yet to be described. Of these, about 400,000 are the coleoptera (beetles).
I do not know if there is an exact percentage, but I do know that the of the known species, the most are invertebrates. This is because bugs are invertebrates. There are so many different species of bigs, just the insects alone, that we cannot find and name them all. Also you have many other groups of invertebrates.
Insects and their relatives have the largest number of species, a total of 875,000.
The group with the most species is that of the arthropods - insects, arachnids and crustaceans. But molluscs and the three groups of worms also make up a good part. Vertebrates is just another group like the arthropods for example - "invertebrates" is incredibly general. There are way more invertebrates than vertebrates.
If insects count, then insects. But if they don't count, I'm not sure but I'm guessing....... birds??
Definetely the sea, Even if you took all the Insects (largest group of land dwelling invertebrates by far) and the plants, It would pale in comparison to the amount of flora and invertebrate fauna in the oceans. The Ocean is where Life began and it has more species diversity, quantity, and mass than double the invertebrates on the Earth's land.
Mammals have only between 4000 and 5000 known species of mammals that are vertebrates. The largest group would be Osteichthyes (or bony fish) which has an astonishing amount that adds up to roughly 29,000 species known to man.
Jellyfish do not have backbones therefore they are known as invertebrates. Jellyfish belong to the to the phylum Cnidaria group of species.
If you mean by main group, vertebrates, because they are invertebrates. But if by main, you mean greatest by number then whether you count them as one celled animals or invertebrates they are much more numerous. They are certainly important to us. Scientists are saying that more than half of the cells in our body are bacteria. If this is so then my little one celled guys are very important to me. What do you mean by main group??
invertebrates