Species: bolti MANN & MADDIN, 2019
Etymology: In hnor of Dr. John Bolt, who contributed much to the study of early microsaurs and, in particular, his curation of Mazon Creek tetrapod fossils prompted this and several future studies.
Holotype: ACFGM V-1634 (latex peel FMNH PR 847)
Locality: Sunspot Mine of Ayrshire Collieries Corp (later Amax Coal Co.), 2 miles norh of Astoria, Fulton County, Illinois.
Horizon: Francis Creek Shale, Carbondale Formation, Mazon Creek lagerstätte.
Biostratigraphy:
Age: Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).
Material: Fragmentary skull and fragmentary skele