FMNH UC 6531, WM 6535, WM 6578: Vertebrae.
FMNH WM 6540: Scapulocoracoid.
FMNH WM 6542, WM 6575: Humerii.
FMNH WM 6553: Radius.
FMNH WM 6547: Ulna.
FMNH WM 6556, WM 6557, WM 6575: Pelvic materials.
FMNH WM 6551: Femur.
FMNH WM 6555: Tibia.
FMNH WM 6553: Fibula.
FMNH WM 6561: Astragli.
LAURIN & BUFFRNEIL, 2016
YPM VP056583: Femur.
MANN, NELSON, HOOK & ELRICK, 2025
FMNH UC 6536: Pair of premaxillae.
FMNH UC 329: Robust right stapes.
FMNH UC 6537, FMNHUR 3025-3037: 13 basiocciptals.
FMNH UR 2785: Left squamosal.
= Clepsydrops pedunculatus COPE, 1877
Etymology:
Holotype: UC 6534
Locality: Horseshoe Bend, a cutbank on teh Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.
Horizon: Macoupin Limestone Member, Patoka Formation.
Biostratigraphy:
Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.
Material: A third cervical and an anterior caudal vertebrae.
= Archaeobelus vellicatus COPE, 1877
Etymology:
Holotype: FMNH UC 6524, FMNH UC 6525
Locality: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.
Horizon: Macoupin Limestone Member, Patoka Formation.
Biostratigraphy:
Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.
Material: Fragment of right maxilla with imperfect teeth.
= Clepsydrops vinslovii COPE, 1877
Etymology:
Holotype: FMNH UC 6532
Locality: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.
Horizon: Macoupin Limestone Member, Patoka Formation.
Biostratigraphy:
Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.
Material: Cervical vertebrae and fragments.
Referred material:
FMNH WM 6533: Vertebrae.
FMNH WM 6558: Pelvis.
FMNH WM 6543, WM 6545, WM 6553: Humerii.
FMNH WM 6548, WM 6549, WM 6550: Femora.
FMNH MW 6561: Astragali.
= ?Captorhinus illinoisensis WILLISTON, 1911
Etymology:Holotype: FMNH WM 6547
Locality: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.
Horizon: Macoupin Limestone Member, Patoka Formation.
Biostratigraphy:
Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.
Material: Femur.