Pygocephalomorpha
crustacean
Quick Summary
Pygocephalomorpha refers to an extinct order of crustaceans that existed from the Carboniferous to the Permian periods. These marine crustaceans were characterized by a large carapace that covered their thorax, with ventral plates widening behind. Their walking legs were six-segmented, and their abdomen had six segments. They are classified within the subclass Eumalacostraca. Crustaceans, as a subphylum of arthropods, are primarily aquatic and exhibit a wide range of sizes and structures.123
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