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- DictionaryMalacostraca/ˌmaləˈkɒstrəkə/
plural
- 1. a large class of crustaceans which includes crabs, shrimps, lobsters, isopods, and amphipods. They have compound eyes, which are typically on stalks.
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Malacostraca (from Neo-Latin; from Ancient Greek μαλακός (malakós) 'soft' and όστρακον (óstrakon) 'shell') is the second largest of the six classes of pancrustaceans just behind hexapods, containing about 40,000 living species, divided among 16 orders.
Malacostracan is a class of crustaceans with more than 29,000 species, including lobsters, crabs, shrimp, and isopods. They have a fixed body plan of head, thorax, and abdomen, and show great diversity of size, form, and ecology.
Malacostraca is the largest class of crustaceans, with about 30,000 species in various aquatic and terrestrial habitats. Learn about their common features, diversity, and ecology from chapters and articles on ScienceDirect Topics.
Malacostraca is a class of pancrustaceans that includes crabs, lobsters, shrimp, krill and many other animals with a segmented body and a hard shell. They are abundant in marine, freshwater and terrestrial habitats and have diverse body forms and adaptations.
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During the late Paleozoic (early Carboniferous through Permian Period, 359 million to 251 million years ago) malacostracans evolved rapidly, apparently in step with the proliferation of coastal vascular plants that formed a major new aquatic food resource.
Malacostraca is a large and diverse taxon (generally class, but sometimes subclass or order) of marine, freshwater, and terrestrial crustaceans, including many of the most familiar crustaceans, such as crabs, lobsters, shrimps, which are characterized by a maximum of 19 pairs of appendages, as well as trunk limbs that are sharply differentiated ...
Malacostracans are distributed worldwide in marine, freshwater, and terrestrial environments. There are roughly 25,000 species in as many as fifteen orders. Decapoda (crabs, lobsters, and shrimps) is the most speciose group within the Malacostraca.
