Animal Diversity 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073524255
ISBN 13: 978-0-07352-425-2

Chapter 13 - Review Questions - Page 301: 17

Answer

Diplopoda, and Chilopoda are two classes in the subphylum Myriapoda of the phylum Arthropoda. Insecta belongs to a different subphylum, the subphylum Hexapoda. Generally, in Myriapoda, all appendages are uniramous (unbranched) : head appendages comprise of one pair of mandibles, and one or two pairs of maxillae. Hexapoda has these characteristics: Body with distinct head, thorax and abdomen. one pair of antennae; mouthparts modified to match feeding habit; a head of six fused segments; a thorax composed of three fused segments; a variable number of abdominal somites -- usually 11. Wings. In these animals the thorax usually has two pairs of wings ( or one pair, or none) and t three pairs of jointed legs . The sexes separate in insects, they are oviparous and usually undergo a metamorphosis -- gradual or abrupt.

Work Step by Step

Insecta: This class belongs to the subphylum Hexapoda. Insects are the most numerous animals. Some of the most common examples are the Diptera (house fly) ; Isoptera (termites); Blattodea (cockroaches); Lepidoptera (butterflies and moths); Coleoptera (beetles); Hymenoptera (ants bees). In insects bases of mouth pars exposed as they exit the head capsule; mandibles have with two regions of articulation. these organisms have one pair of antennae per animal. All these animals have two sexes. Diplopoda have two pairs of legs per segment but Chilopoda have one pair of legs per segment All three groups have one pair of antennae, but Diplopoda have short antennae while Chilopoda have long antennae . The Chilopoda body is flattened dorsiventrally, while the Diplopoda body is sub-cylindrical.
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