Briefly describe the organisation of Malacostraca. Give a few examples of decapod malacostracans.

Malacostraca is the largest and most diverse class of crustaceans, characterized by a well-defined body organization. Their body is typically divided into three main regions: the head (cephalon), thorax (pereon), and abdomen (pleon). The head bears compound eyes, two pairs of antennae, and mouthparts, including mandibles and maxillae. The thorax is composed of eight segments, each bearing a pair of appendages ________ _______ _________ _______ _________ ______ _________.
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