Pygocephalomorpha

Pygocephalomorpha
Temporal range: Famennian–Early Permian
Life restoration of Pygocephalus brymboensis
Life restoration of Tealliocaris etheridgii
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Clade: Pancrustacea
Class: Malacostraca
Superorder: Peracarida
Order: †Pygocephalomorpha
Beurlen, 1930
Families

The order Pygocephalomorpha is an extinct group of peracarid crustaceans. Pygocephalomorpha appeared in the Late Devonian, were abundant from the Carboniferous era until their extinction in the Early Permian era.

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 somewhat well developed branchiostegites".

Taxonomy

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

Phylogeny

The phylogeny of Pygocephalomorpha after Astrop 2026.

†Pygocephalomorpha

See also

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.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  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.
  8. ↑ Astrop, Tim (2026). "A new pygocephalomorph crustacean from the Brymbo Fossil Forest (Moscovian), North Wales, UK and a reassessment of the genus Pygocephalus". Journal of Systematic Palaeontology. 24 (2). Taylor and Francis Online. doi:10.1080/14772019.2026.2699904. ISSN 1478-0941. Retrieved September 13, 2026.