These animals have highly modified mandibles, but they belong in the Mandibulata just the same. Their bodies are made of a head followed by many similar segments each bearing one or two pairs of legs. Myriapods include centipedes, millipedes, and their relatives. There are about 3,000 known species of centipedes. Most of them are ground-dwelling, and some are adapted for burrowing into soil, but a few are marine.
Millipedes have two pairs of legs per body segment.
These animals do not have poison fangs, although many species have glands that secrete defensive chemicals, including cyanide-like compounds. 3rd ed WH Freeman, New York. Pechenik, J. A. 2000. Biology of the Invertebrates, 4th ed. McGraw-Hill, New York.