Pygocephalomorpha

The order Pygocephalomorpha is an extinct group of peracarid crustaceans.

[1] 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] The order contains extinct five families, and seven genera incertae sedis:[3][4]

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