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Pygocephalomorpha

From Wikipedia, the free encyclopedia

Pygocephalomorpha
Temporal range: Famennian–Early Permian
Fossil specimens of Hoplita ginsburgi
Life restoration of Tealliocaris etheridgii
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
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,[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

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

See also

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References

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  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.