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.

Diabloroter Temporal range: Carboniferous,
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
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 specific 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