Embrithosaurus

Embrithosaurus was a pareiasaur from the Permian of South Africa.^[1]

Embrithosaurus Temporal range: 265–260 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Procolophonomorpha
Family:	†Pareiasauridae
Genus:	†Embrithosaurus Watson, 1914
Type species
†Embrithosaurus schwarzi Watson, 1914
Species
†E. alexanderi Haughton and Boonstra, 1929 †E. schwarzi Watson, 1914 †E. strubeni Broom, 1924
Synonyms
Brachypareia watsoni Haughton and Boonstra, 1929 Bradysaurus strubeni Boonstra, 1969 Bradysaurus watsoni Haughton and Boonstra, 1929 Dolichopareia angusta Haughton and Boonstra, 1929 Embrithosaurus angustus Haughton and Boonstra, 1929 Nochelesaurus angustus Haughton and Boonstra, 1929 Pareiasaurus bombidens Seeley, 1888

Description

Embrithosaurus was 3 metres (9 ft 10 in) in length^[2] and 600 kilograms (1,300 lb) in weight. The skull is relatively deep and narrow. The body is lightly armoured with thin, smooth dermal scutes.

Species

• E. schwarzi (Watson, 1914). The type species. This is the most advanced species of this genus, as indicated by the teeth, which have nine cusps (in three groups of three). In cladistic analyses it is used as the monotypal species for the genus.
• E. alexanderi (Haughton and Boonstra, 1929). This species was made the type for "Dolichopareia". As the name indicates, the skull is long and narrow. This would seem to indicate a different lifestyle or diet to other parieasaurs. More recently, it has been used as the monotypal species for the genus Nochelesaurus^[3] (it is not clear what the status of Embrithosaurus strubeni is, this may be a further transitional species). In cladistic analyses, this species is phylogenetically intermediate between Bradysaurus seeleyi and Embrithosaurus schwarzi.
• E. strubeni (Broom, 1924). The skull is large and deep, pointed at the front, and elevated in the jugal region. This species was originally made the type species of Nochelosaurus by Haughton and Boonstra. Boonstra later (1969) moved it into the genus Bradysaurus, on the basis of the primitive tooth structure. Kuhn however considers it belongs under Embrithosaurus.

References

1. Google Books
2. Marco Romano, Fabio Manucci, Bruce Rubidge, Marc J. Van den Brandt (17 June 2021). "Volumetric Body Mass Estimate and in vivo Reconstruction of the Russian Pareiasaur Scutosaurus karpinskii". Frontiers in Ecology and Evolution. 9. doi:10.3389/fevo.2021.692035. hdl:11573/1634310.{{cite journal}}: CS1 maint: multiple names: authors list (link)
3. Van Den Brandt, Marc J.; Rubidge, Bruce S.; Benoit, Julien; Abdala, Fernando (March 2021). "Cranial morphology of the middle Permian pareiasaur Nochelesaurus alexanderi from the Karoo Basin of South Africa". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 112 (1): 29–49. doi:10.1017/S1755691021000049. ISSN 1755-6910. S2CID 233839915.

External links

• Velosauria at Palaeos