Diabloroter

Diabloroter is a Carboniferous genus of brachystelechid 'microsaur' from the Mazon Creek lagerstätte in Illinois. It was named in 2019 by Arjan Mann and Hillary C. Maddin.[1][2]

Diabloroter
Temporal range: Carboniferous,
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subclass: †Lepospondyli
Order: †Microsauria
Family: †Brachystelechidae
Genus: †Diabloroter
Mann & Maddin, 2019
Species:
†D. bolti
Binomial name
†Diabloroter bolti
Mann & Maddin, 2019

History of study

The genus name is derived from the roots diabolus ("devil"), which refers to the stark red color of the latex peels used in the original study, and rota ("wheel") to refer to the English rotavator (a digger), which in turn refers to the fossorial ecology of recumbirostrans. The species name honors American paleontologist John Bolt. The taxon is represented by a single, nearly complete skeleton that was collected from the Sunspot Mine at Mazon Creek, Illinois.

Anatomy

Mann and Maddin (2019) diagnose Diabloroter by the following features: (1) long maxilla; (2) skull roof ornamented with radiating grooves; (3) circular pits on the prefrontal; and (4) a narrow and blunt snout. They differentiate it from the European Batropetes by: (1) reduced lengthening of the mid-dorsal ribs; and (2) a less robust pectoral girdle. They also differentiate it from the North American Quasicaecilia by: (1) less rounded skull; (2) reduced contribution of the nasals to the snout; and (3) more extensive lateral cheek.

The holotype measures approximately 5.3 cm in length with a 0.92 cm long skull.

Relationships

Below is the strict consensus topology recovered by the maximum parsimony analysis of Mann & Maddin (2019):

 
 

Seymouria

 
 
 

Limnoscelis

 
 Amniota 
 

Petrolacosaurus

 
 

Captorhinus

 
 

Opisthodontosaurus

 
 
 

Ophiacodon

 
 

Dimetrodon

 
 
 Recumbirostra 
 

Pantylus

 
 

Llistrofus

 
 
 

Micraroter

 
 
 

Nannaroter

 
 

Pelodosotis

 
 
 
 
 
 

Huskerpeton

 
 

Cardiocephalus

 
 
 
 

Rhynchonkos

 
 
 

Aletrimyti

 
 

Dvellecanus

 
 
 
 
 
 
 

Brachydectes

 
 Brachystelechidae 
 

Quasicaecilia

 
 
 

Diabloroter

 
 
 

Batropetes

 
 

Carrolla

 
 
 
 
 
 
 
 
 
 

References

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