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, 309–307 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
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

1. Mann, Arjan; Maddin, Hillary C (2019-09-30). "Diabloroter bolti, a short-bodied recumbirostran 'microsaur' from the Francis Creek Shale, Mazon Creek, Illinois". Zoological Journal of the Linnean Society. 187 (2): 494–505. doi:10.1093/zoolinnean/zlz025. ISSN 0024-4082.
2. "Altmetric – Diabloroter bolti, a short-bodied recumbirostran 'microsaur' from the Francis Creek Shale, Mazon Creek, Illinois". oxfordjournals.altmetric.com. Retrieved 2019-12-09.