The Order Odonata is divided into three groups: Anisoptera (dragonflies),
Zygoptera (damselflies) and Anisozygoptera (a relict group represented by only
two living species). One species located in both Japan and the Himalayas. This
is an extremely diverse order with about 5000-6500 different species.
The
characteristics of the modern dragonflies have not changed much from their
ancient ancestors, except for their size. This is evident throughout the fossil
record. There are many distinguishable features about dragonflies, which
separate them from the rest of the insect world. Dragonflies have very long
slender bodies, narrow wings, huge eyes and a strong jaw for eating prey. They
come in an array of colors, and are usually located near a water
source.
To the left is a picture of a modern of dragonfly species from the Anisopetera group. Note the shorter body lenght compare to the Zygopetera group shown below. | |||||||
To the right is a picture of a brilliantly blue colored damselfly. A member of the Zygopetera group. |