Biology:Anomodont

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Short description: Suborder of stem-mammals

Anomodonts
Temporal range: Middle Permian-Late Triassic, 270–201 Ma
Mounted skeleton of Lystrosaurus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Suborder: †Anomodontia
Owen, 1859
Subgroups

See text

Anomocephalus
Otsheria
Aulacocephalodon
Kannemeyeria

Anomodontia is an extinct group of non-mammalian therapsids from the Permian and Triassic periods.[1] By far the most speciose group are the dicynodonts, a clade of beaked, tusked herbivores.[2] Anomodonts were very diverse during the Middle Permian, including primitive forms like Anomocephalus and Patranomodon and groups like Venyukovioidea and Dromasauria. Dicynodonts became the most successful and abundant of all herbivores in the Late Permian, filling ecological niches ranging from large browsers down to small burrowers. Few dicynodont families survived the Permian–Triassic extinction event, but one lineage (Kannemeyeriiformes) evolved into large, stocky forms that became dominant terrestrial herbivores right until the Late Triassic, when changing conditions caused them to decline, finally going extinct during the Triassic–Jurassic extinction event.

Classification

Taxonomy

Phylogeny

Cladogram modified from Cisneros et al., 2015.[3]

Anomodontia
 

Biseridens

 
 
Anomocephaloidea
 

Anomocephalus

 
 

Tiarajudens

 
 
 
 

Galechirus

 
Venyukovioidea
 

Otsheria

 
 
 

Suminia

 
 

Ulemica

 
 
 
Chainosauria
 

Patranomodon

 
 
 

Galeops

 
 

Dicynodontia

 
 
 
 
 
 

Cladogram modified from Angielczyk and Kammerer (2017):[4]

Anomodontia
 

Biseridens

 
 
Venyukovioidea
 

Otsheria

 
 
 

Suminia

 
 

Ulemica

 
 
 
Chainosauria
 

Galepus

 
 
Anomocephaloidea
 

Anomocephalus

 
 

Tiarajudens

 
 
 
 

Patranomodon

 
 
 

Galechirus

 
 
 

Galeops

 
 

Dicynodontia

 
 
 
 
 
 
 
 

See also

References

  1. ↑ Liu, J.; Rubidge, B.; Li, J. (2009). "A new specimen of Biseridens qilianicus indicates its phylogenetic position as the most basal anomodont". Proceedings of the Royal Society B 277 (1679): 285–292. doi:10.1098/rspb.2009.0883. PMID 19640887. 
  2. ↑ Chinsamy-Turan, A. (2011) Forerunners of Mammals: Radiation - Histology - Biology, p.39. Indiana University Press, ISBN 0253356970. Retrieved May 2012
  3. ↑ Cisneros, Juan Carlos; Abdala, Fernando; Jashashvili, Tea; De Oliveira Bueno, Ana; Dentzien-Dias, Paula (2015). "Tiarajudens eccentricus and Anomocephalus africanus , two bizarre anomodonts (Synapsida, Therapsida) with dental occlusion from the Permian of Gondwana". Royal Society Open Science 2 (7): 150090. doi:10.1098/rsos.150090. PMID 26587266. Bibcode: 2015RSOS....250090C. 
  4. ↑ Angielczyk, Kenneth D.; Kammerer, Christian F. (2017). "The cranial morphology, phylogenetic position and biogeography of the upper Permian dicynodont Compsodon helmoedi van Hoepen (Therapsida, Anomodontia)". Papers in Palaeontology 3 (4): 513–545. doi:10.1002/spp2.1087. 

Wikidata ☰ Q131803 entry