Pygocephalomorpha
Extinct order of crustaceans
From Wikipedia, the free encyclopedia
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]
| Pygocephalomorpha Temporal range: | |
|---|---|
| |
| Fossil specimens of Hoplita ginsburgi | |
 | |
| Life restoration of Tealliocaris etheridgii | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Superorder: | Peracarida |
| Order: | †Pygocephalomorpha Beurlen, 1930 |
| Families | |
| |
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
