Chapter 15 ~ The Arthropods
Contents ~ Introduction ~ Protozoans ~ Metazoans ~ Sponges ~ Cnidaria
The insects are a diverse group. Shown: moth larva, Marsh fly, and damselfly.
Subclass Archaeognatha (jumping bristletails)
Introduction to the Insects
In terms of number of species described, the Subphylum Hexapoda is the largest in the Phylum Arthropoda. Hexapods (meaning "six legs or feet") include the insects (Class Insecta), which dominate terrestrial environments on earth. The subphylum also includes several groups of wingless arthropods of uncertain placement; namely the orders: Diplura, Collembola, and Protura.
- Read Subphylum Hexapoda
- Read Class Insecta (Follow links as necessary to understand the terminology; Also included are:)