Biology:Obirkovia

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Short description: Genus of extinct pareiasaur reptiles

Obirkovia
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: †Parareptilia
Order: †Procolophonomorpha
Clade: †Pareiasauria
Clade: †Elginiidae
Genus: †Obirkovia
Species:
†O. gladiator
Binomial name
†Obirkovia gladiator
Bulanov & Yashina, 2005

Obirkovia is an extinct genus of pareiasaur from the late Permian Salarevo Formation of Russia. The genus contains a single species, O. gladiator, known from a left quadratojugal.

Discovery and naming

The Obirkovia holotype specimen, PIN, no. 4546/18, was discovered in sediments of the Salarevo Formation (Vyatka Horizon) at the Obirkovo locality in Babushkinskii District of Vologda Oblast, Russia. The specimen consists of a single left quadratojugal.[1]

In 2005, Bulanov & Yashina described Obirkovia gladiator as a new genus and species of elginiid pareiasaur based on these fossil remains. The generic name, "''Obirkovia", references the locality where the holotype was discovered. The specific name, "gladiator", references the armed combatants of Ancient Rome.[1]

Classification

Cisneros, Dentzien-Dias & Francischini (2021) recovered Obirkovia as an elginiid member of the Pareiasauria, in a clade that also contains Elginia spp. and Arganaceras. The results of their phylogenetic analyses are shown in the cladogram below:[2]

Pareiasauria
 

'Bradysaurus' seeleyi

Bradysauria
 
 
 

Nochelesaurus

 
 
 

Bradysaurus baini

 
 
 

Embrithosaurus

 
 
 

Bunostegos

 
 
 

Parasaurus

 
 

Honania

 
 

Deltavjatia

 
Pumiliopareiasauria
 

Provelosaurus

 
 

Nanoparia

 
 
 

Pumiliopareia

 
 

Anthodon

 
 
 
Therischia
 
 

Shihtienfenia

 
 
 

Pareiasuchus nasicornis

 
 

Pareiasuchus peringueyi

 
 
 
 
 

Scutosaurus

 
 
 

Pareiasaurus serridens

 
Elginiidae
 

Elginia wuyongae

 
 

Elginia mirabilis

 
 

Obirkovia

 
 

Arganaceras

 
 
 
 
 
 
 
 
 
 
 

References

  1. ↑ 1.0 1.1 Bulanov, V. V.; Yashina, O. V. (2005). "Elginiid Pareiasaurs of Eastern Europe". Paleontological Journal 39 (4): 428–432. https://www.researchgate.net/publication/292545512. 
  2. ↑ Cisneros, Juan C.; Dentzien-Dias, Paula; Francischini, Heitor (2021-11-17). "The Brazilian Pareiasaur Revisited". Frontiers in Ecology and Evolution 9. doi:10.3389/fevo.2021.758802. ISSN 2296-701X. 

Wikidata ☰ Q124006660 entry