The arthropod Phylum (Arthropoda) consists of four major groups or
Classes of animals: the Insecta (insects), the Arachnida (spiders, mites, etc.), the Myriapoda
(millipedes, centipedes, etc.) and the Crustacea (crabs, lobsters, shrimps, woodlice, etc.). In addition there are
several minor Classes. Full details of all these groups can be found on the Classification of
Arthropods page. Some of the sub-divisions (Orders) of the major arthropod Classes are listed below, each linked to a
page describing the general characteristics of the group, with photographs illustrating typical examples of the British fauna
(mainly the more common species frequently found in homes, gardens, parks and hedgerows). Image captions include body-length
(b.) or wing-span (w.), as a guide to size.