Furileusauria

Furileusauria ("stiff back lizards") is an extinct clade of derived abelisaurid dinosaurs only known from South American fossil remains.[1] They represent some of the largest members of the Abelisauridae, with an average length of 7.1 ± 2.1 m (23.3 ± 6.9 ft).[2] The clade is defined as the most inclusive clade containing Carnotaurus sastrei but not Ilokelesia aguadagrandensis, Skorpiovenator bustingorryi, or Majungasaurus crenatissimus.[1]

Furileusaurians
Temporal range: Late Cretaceous, Santonian–Maastrichtian
Restoration of a sprinting Carnotaurus sastrei
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: †Abelisauridae
Clade: †Brachyrostra
Clade: †Furileusauria
Filippi, 2016
Genera

Classification

Distinguishing traits

Furileusauria is distinguished by several traits exclusive to the members of this clade. These are:[1]

  • the presence of a tip in the middle area of the posterior surface of the ventral process of the postorbital
  • the presence of a knob followed by a deep notch in the postorbital-squamosal contact
  • an absence of fenestra (openings in the skull) between the frontal, postorbital and lacrimal
  • an anterior projection of the distal end of the cervical epiphophyses
  • the posterior margin of the postzygapophyses at level with the intervertebral articulation in dorsal vertebrae
  • a crescent-shaped morphology of the distal tip of the transverse processes in anterior and middle caudal vertebrae
  • the transverse processes of anterior caudal vertebrae distally expanded and only anteriorly projected
  • a convex external margin of the transverse processes in anterior caudal vertebrae
  • cnemial crest of the tibia with a downturned process

Phylogeny

In the description of the abelisaurid Viavenator, the authors performed a phylogenetic analysis to test the affinities of the new taxon. The simplified strict consensus tree of the analysis is shown below.[1]

Abelisauridae
 

Kryptops

 
 
 

Rugops

 
 
Majungasaurinae
 
 

Genusaurus

 
 

Arcovenator

 
 
 
 

Rajasaurus

 
 

Indosaurus

 
 

Majungasaurus

 
 
 
Brachyrostra
 

Xenotarsosaurus

 
 
 
 

Dahalokely

 
 

Rahiolisaurus

 
 
 
 
 

Ilokelesia

 
 
 

Ekrixinatosaurus

 
 

Skorpiovenator

 
 
 
Furileusauria
 

Pycnonemosaurus

 
 

Quilmesaurus

 
 

Viavenator

 
 
 

Carnotaurus

 
Abelisaurinae
 

Aucasaurus

 
 

Abelisaurus

 
 
 
 
 
 
 
 
 
 

See also

References
  1. Filippi, Leonardo S.; Méndez, Ariel H.; Juárez Valieri, Rubén D.; Garrido, Alberto C. (2016-06-01). "A new brachyrostran with hypertrophied axial structures reveals an unexpected radiation of latest Cretaceous abelisaurids" (PDF). Cretaceous Research. 61: 209–219. doi:10.1016/j.cretres.2015.12.018. ISSN 0195-6671.
  2. Grillo, Orlando Nelson; Delcourt, Rafael (2017-01-01). "Allometry and body length of abelisauroid theropods: Pycnonemosaurus nevesi is the new king". Cretaceous Research. 69: 71–89. doi:10.1016/j.cretres.2016.09.001. ISSN 0195-6671.


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