Home>>By Class>>Invertebrates

#Invertebrates#

Invertebrates refer to lower animal groups that do not have backbones. They are the primitive forms of animals. Its species account for 95% of the total number of animal species. Distributed all over the world, there are about 1 million species in existence. Including protozoa, echinoderms, mollusks, platyhelminthes, annelids, coelenterates, arthropods, linear animals, etc.
Protozoa Echinodermata Mollusca Platyhelminthes Annelida Coelenterata Arthropoda Nematomorpha Brachiopoda Hemichordata