Pygocephalomorpha Explained

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]

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]

Families

The order contains extinct five families, and seven genera incertae sedis:

• • • Jerometichenoriidae Jerometichenoria
    • Notocarididae Notocaris
  • Paulocaris
    • Pygocephalidae Anthracaris
  • Mamayocaris
  • Pygocephalus
    • Tealliocarididae Tealliocaris
    • Tylocarididae Chaocaris
  • Fujianocaris
  • Liocaris
  • Pseudogalathea
  • Tylocaris
• Pygocephalomorpha
  • Bellocaris
  • Hoplita
  • Iraticaris
  • Permocaris
  • Pittinucaris
  • Pygaspis
  • Sosiocaris

See also

• Tealliocaris

Notes and References

1. Book: Elva Escobar-Briones, Fernando Alvarez . 2002 . Modern approaches to the study of Crustacea . Springer . 978-0-306-47366-1 . Habitat specialization and its relation to conservation policy in Crustacea . Marjorie L. Reaka-Kudla . 211–221 . https://books.google.com/books?id=H_u6HHgd2bMC&pg=PA215.
2. Jones, Feldmann, Schweitzer, Reitano, Insacco . Wade, Rodney, Carrie, Agatino, Gianni . 1 September 2015 . New Pygocephalomorph (Peracarida) from the Permian of the Sosio Valley (Sicily, Italy) . 10.1163/1937240X-00002367 . Journal of Crustacean Biology . 35 . 5 . 627–632 . Oxford Academic.