| Pygocephalomorpha Temporal range:
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|---|---|
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| Fossil specimens of Hoplita ginsburgi | |
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| Life restoration of Tealliocaris etheridgii | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Malacostraca |
| Superorder: | Peracarida |
| Order: | †Pygocephalomorpha Beurlen, 1930 |
| Families | |
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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.23
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:56
- †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 uncertain7)
- †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
References
References
- 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.
- 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.
- 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.
- 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) - WoRMS. "Pygocephalomorpha". World Register of Marine Species. Retrieved 26 December 2022.
- WoRMS. "Pygocephalomorpha incertae sedis". World Register of Marine Species. Retrieved 26 December 2022.
- 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.