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Unit 400: Therapsida

The Vertebrates

340: Biarmosuchia: Burnetiamorpha

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Therapsida: Biarmosuchia: Burnetiamorpha

Abbreviated Cladogram

SYNAPSIDA
|
Therapsida
`-Raranimus
  |--Biarmosuchia
  |  |--Biarmosuchidae
  |  `--Ictidorhinidae
  |     `--Burnetiamorpha
  |     `--Burnetiamorpha
  |        |--Lemurosaurus
  |        `--Burnetiidae 
  `-+--Eotitanosuchia
    `-Eutherapsida
      |--Dinocephalia
      |  |--Anteosauria
      |  `--Tapinocephalia
      `--+--Anomodontia
         |  |--Venyukovioidea
         |  `--Dicynodontia   
         `--Theriodontia
            |--Gorgonopsia
            `--+--Therocephalia
               `--CYNODONTIA

Contents

400.000 Overview
400.100 Therapsida
400.200 Ancestral forms
400.300 Biarmosuchia
   400.320 Biarmosuchidae / Eotitanosuchidae
   400.330 Ictidorhinidae / Hipposauridae
   400.340 Burnetiamorpha
400.400 Dinocephalia
400.500 Anomodontia
400.600 Dicynodontia
400.700 Theriodontia
400.800 Gorgonopsia
400.900 Therocephalia
Cladogram
References

Taxa on This Page

  1. Burnetiamorpha X
  2. Burnetiidae X
  3. Lemurosaurus X

Burnetiamorpha

Burnetiamorpha
Burnetiamorpha - artwork by Mojcaj - Wikipedia

More text to be added (eventually)...

ProburnetiaBurnetiamorpha: Bullacephalus, Burnetia, Lemurosaurus, Proburnetia etc

Range: Middle to Late Permian of South Africa

Phylogeny: Biarmosuchia: Ictidorhinidae ::: * : Lemurosaurus + Burnetiidae

Characters: Distinguished by three sets of bony bosses (hornlets): supraorbital (above eyes), on ventral surface of squamosal lateral to level of quadrate, and on lower margin of zygomatic arch at level of postorbital bar (cheek); pit on lateral surface of lacrimal; median frontal ridge, which varies in shape (Sidor & Welman 2003 p.632). These bony decorations can be seen in the drawing of the skull (right)

Illustration: (right) Proburnetia viatkinenses in lateral (top) and dorsal (bottom) views, showing bony bosses and ridges - from Rubidge and Sidor 2002, via Kemp 2005 p.32

References: Sidor & Welman 2003, Jacobs et. al. 2005.  MAK091111.


Burnetiidae: Bullacephalus, Burnetia, Proburnetia

Range: Middle to Late Permian of South Africa and Russia (Niuksenitia sukhonense)

Phylogeny: Burnetiamorpha: Lemurosaurus + *

Links: Burnetiidae - Wikipedia (stubby)

References: Sidor & Welman 2003 pp.638-9.  MAK091111.


LemurosaurusLemurosaurus: Lemurosaurus pricei Broom 1949

Range: Late Permian (Wuchiapingian) of South Africa

Phylogeny: Burnetiamorpha: Burnetiidae + *

Characters: A primitive, unspecialised form. Small boss at dorsal apex of lateral temporal fenestra; low, ridge-like frontal crest; very coarse serrations on posterior margin of postcanine teeth. Lacks typical Burnetiamorph features of pachyostosed skull roof, nasal boss; and backwardly-pointing squamosal horns. (Sidor & Welman 2003 p.634).

Illustration: Lemurosaurus pricei in lateral view, from Sidor & Welman 2003, via Kemp 2005 p.32

References: Sidor & Welman 2003.  MAK091111.


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