Pygocephalomorpha

Pygocephalomorpha; Temporal range: Carboniferous–Permian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Superorder:	Peracarida
Order:	†Pygocephalomorpha; Beurlen, 1930
Families
	Jerometichenoriidae; Notocarididae; Pygocephalidae; Tealliocarididae; Tylocarididae;

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]

^ Marjorie L. Reaka-Kudla (2002). "Habitat specialization and its relation to conservation policy in Crustacea". In Elva Escobar-Briones, Fernando Alvarez (ed.). Modern approaches to the study of Crustacea. Springer. pp. 211–221. ISBN 978-0-306-47366-1.
^ 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)". Journal of Crustacean Biology. 35 (5): 627–632. doi:10.1163/1937240X-00002367 – via Oxford Academic.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[1] Marjorie L. Reaka-Kudla (2002). "Habitat specialization and its relation to conservation policy in Crustacea". In Elva Escobar-Briones, Fernando Alvarez (ed.). Modern approaches to the study of Crustacea. Springer. pp. 211–221. ISBN 978-0-306-47366-1.

[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)". Journal of Crustacean Biology. 35 (5): 627–632. doi:10.1163/1937240X-00002367 – via Oxford Academic.{{cite journal}}: CS1 maint: multiple names: authors list (link)

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