Pygocephalomorpha
Extinct order of crustaceans / From Wikipedia, the free encyclopedia
The order Pygocephalomorpha is an extinct group of peracarid crustaceans. Pygocephalomorpha were abundant from the Carboniferous era until their extinction in the Permian era.[1]
Quick Facts Scientific classification, Families ...
Pygocephalomorpha | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Malacostraca |
Superorder: | Peracarida |
Order: | †Pygocephalomorpha Beurlen, 1930 |
Families | |
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This group constituted part of the freshwater and aquatic crustacean assemblages. The carapace is relatively axially shortened, with a prominent gastric region. Laterally, a cervical groove is visible, with carapace margins which is defined by an acute spine or process, including a somewhat well developed branchiostegites"[2]