Pygocephalomorpha

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]

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

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:^[3][4]

• †Jerometichenoriidae Schram, 1978
  • †Jerometichenoria Schram, 1978
• †Notocarididae Brooks, 1962
  • †Notocaris Broom, 1931
  • †Paulocaris Clarke, 1920
• †Pygocephalidae Brooks, 1962
  • †Anthracaris Brooks, 1962
  • †Mamayocaris Brooks, 1962
  • †Pygocephalus Huxley, 1857
• †Tealliocarididae Brooks, 1962
  • †Tealliocaris Peach, 1908
• †Tylocarididae Taylor, Yan-Bin & Schram, 1998
  • †Chaocaris Shen, 1983
  • †Fujianocaris Taylor, Yan-Bin & Schram, 1998
  • †Liocaris Beurlen, 1931
  • †Pseudogalathea Peach, 1883
  • †Tylocaris Taylor, Yan-Bin & Schram, 1998
• †Pygocephalomorpha incertae sedis
  • †Bellocaris Fong, 1972
  • †Hoplita Pineiro, Morosi & Ramos, 2012
  • †Iraticaris Adami-Rodrigues, Pazinato & Pinto, 2016
  • †Permocaris Adami-Rodrigues, Pazinato & Pinto, 2016
  • †Pittinucaris Adami-Rodrigues, Pazinato & Pinto, 2016
  • †Pygaspis Beurlen, 1934
  • †Sosiocaris Jones, 2015

See also

• Tealliocaris

References

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 – via Oxford Academic.{{cite journal}}: CS1 maint: multiple names: authors list (link)
3. WoRMS. "Pygocephalomorpha". World Register of Marine Species. Retrieved 26 December 2022.
4. WoRMS. "Pygocephalomorpha incertae sedis". World Register of Marine Species. Retrieved 26 December 2022.