Pygocephalomorpha

Pygocephalomorpha Temporal range: Famennian–Early Permian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil specimens of Hoplita ginsburgi
Life restoration of Tealliocaris etheridgii
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 appeared in the Late Devonian, ^[1] were abundant from the Carboniferous era until their extinction in the Early Permian era. ^{[2] [3]}

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" ^[4]

Families

The order contains extinct five families, and seven genera incertae sedis : ^{[5] [6]}

• † 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 (Affinity as pygocephalomorph is uncertain ^[7] )
  • † Tealliocaris Peach, 1908
  • † Laevitealliocaris Yang et al., 2018
• † 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. Gueriau, Pierre; Charbonnier, Sylvain; Clément, Gaël (2014). "First decapod crustaceans in a Late Devonian continental ecosystem". Palaeontology. 57 (6): 1203–1213. doi:10.1111/pala.12111. ISSN   1475-4983.
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.
3. Pazinato, Paula Giovana; Soares, Marina Bento; Adami-Rodrigues, Karen (2016). "Systematic and palaeoecological significance of the first record of Pygocephalomorpha females bearing oöstegites (Malacostraca, Peracarida) from the lower Permian of southern Brazil". Palaeontology. 59 (6): 817–826. doi:10.1111/pala.12260. ISSN   1475-4983.
4. 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.
5. WoRMS. "Pygocephalomorpha". World Register of Marine Species . Retrieved 26 December 2022.
6. WoRMS. "Pygocephalomorpha incertae sedis". World Register of Marine Species . Retrieved 26 December 2022.
7. Jones, Wade T.; Feldmann, Rodney M.; Schram, Frederick R.; Schweitzer, Carrie E.; Maguire, Evin P. (2016). "The Proof is in the Pouch: Tealliocaris is a Peracarid". Palaeodiversity. 9 (1). doi:10.18476/pale.v9.a5.full. ISSN   1867-6294. Archived from the original on 2024-05-26.