Diabloroter
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''Diabloroter'' is a
Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ...
genus of brachystelechid ' microsaur' from the
Mazon Creek The Mazon Creek fossil beds are a conservation ' found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions, formed approximately in the mid- Pennsylvanian epoch of the Carboniferous period. These concreti ...
lagerstätte in Illinois. It was named in 2019 by Arjan Mann and Hillary C. Maddin.


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):


References

{{Taxonbar, from=Q77917017 Microsauria Carboniferous amphibians Carboniferous animals of North America Carboniferous Idaho Fossil taxa described in 2019