Species: wildi (WOODWARD, 1891) WATSON, 1921
Etymology:
= Hylonomus wildi WOODWARD, 1891

Holotype: MM W1222

Locality: Carre Heys, Mountain Four-feet Mine, near Trawden, near Colne, Lancashire County, England, Southern United Kingdom.

Horizon: Lower Coal Measures, Lenisulcata zone.

Biostratigraphy:

Age: Langsettian Regional Stage, Late Bashkirian Epoch, Early Pennsylvanian Subperiod, Early Late Carboniferous Period.

Material: Nearly complete skull.

Referred material:

Another skull not described mentioned by Bolton, 1904.