Genus: Ptyonius COPE, 1875
Etymology:
= Hyphasma COPE, 1874
Etymology:

Species: marshii (COPE 1869) COPE, 1875
Etymology:

Holotype: It is impossible to determine which one of the specimens is the type.

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material:

140, 1096G, 8345G, 8555G, 1089G, 2.232, 233, no number, 1094G, 8545G, 8677G, 1159G, 105, no number, 1091G, 7a, 1092G, 1093G, 1095G, 153 and others unnumbered in the American Museum of Natural History, in the USNM 4458, 4463, 4464, 4514: Fragmentary skulls and fragmentary skeletons.

Referred material:

HUREY, 2023

CM95966: Caudal vertebrae.

 

= Colosteus marshii COPE, 1869
Etymology: In honor of O. C. Marsh.
= Oestocephalus marshii (COPE, 1869) COPE, 1871
= Sauropleura marshii (COPE, 1869) ROMER, 1930

Holotype: USNM 6862

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material: Fragmentary skull and fragmentary skeleton.

Referred material:

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material:

AMNH 1157G: Fragmentary skull and fragmentary skeleton.

 

GODFREY, 1997


Locality: Pit 11, Peabody Coal Company, Will County, Illinois.

Horizon: Essex Nodule fauna, Frances Creek Shale.

Biostratigraphy:

Age: Middle Silesian series, Westephalian C, Podolskian stage, or Westephalian D, Myachkovskian stage, Moscovian Epoch, Middle Pennsylvanian (Middle Carboniferous).

Material:

FMNH PR 1353: Skull and fragmentary skeleton.

 

= Oestocephalus vinchellianus COPE, 1875
Etymology:
= Ptyonius vinchellianus COPE, 1875
Holotype: USNM 6872

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material: Fragmentary skeleton.

 

= Ptyonius nummifer COPE, 1875
Etymology:
= Sauropleura nummifer (COPE 1875) ROMER, 1930

Holotype: USNM 6891

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material: Fragmentary skull and fragmentary skeleton.

Referred material:

AMNH 8546G, AMNH 8614G: Skulls and skeletons.

 

= Hyphasma laevis COPE, 1875
Etymology:

Holotype: USNM 6877

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material: Fragmentary skull and fragmentary skeleton.

 

= Oestocephalus serroula COPE, 1871
Etymology:
= Ptyonius serroula (COPE, 1871) COPE, 1875

Holotype: AMNH 8615G

Locality: Linton locality (Coal mines originally owned by the Ohio Diamond Coal Company), NE corner Sect. 13, T9N, R2W, Linton near Wellsvile, west bank near mouth of Yellow Creek, Saline Township, Jefferson County, Ohio.

Horizon: Canneloid shale underlying Upper Freeport Coal, Allegheny Group.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian series, Myachkovskian stage, Upper Moscovian Epoch, Middle Pennsylvanian (Late Carboniferous).

Material: Fragmentary skeleton.

Referred material:

AMNH 456G: Fragmentary skeleton.

 

= Sauropleura sp GREGORY, 1950

Locality: Pit 11, Peabody Coal Company, Will County, Illinois.

Horizon: Essex Nodule fauna, Frances Creek Shale.

Biostratigraphy:

Age: Middle Silesian series, Westephalian C, Podolskian stage, or Westephalian D, Myachkovskian stage, Moscovian Epoch, Middle Pennsylvanian (Middle Carboniferous).

Material:

USNM 18125: Both the anterior part of skull and distal end of tail missing.

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Species:? olisthmonaias THAYER, 1865
Etymology:

Holotype: UALP 5264

Locality: UALP 7205, Swisshel Mountains, Cochise County, Arizona.

Horizon: Black Prince Limestone, one meter below contact with overlying Pennsylvanian Horquilla limestone, Late Morrowan or earliest Derryan (equivalent to Langsettian – Duckmantia boundary).

Biostratigraphy:

Age: Westephalian, lower upper Silesian, upper Bashkrian or lower Moscovian Epoch, early Pennsylvanian (Late Carboniferous).

Material: A caudal vertebra lacking the neural spine.

Hypodigm

UALP 5161, 5162, 5170, 5207, 5211, 5212, 5694, 5857-5860, 6212, 6223: Disarticulated vertebrae including 6 dorsals and 5 caudals.