Species: fragilis (NEWBERRY, 1857)
Etymology:
= Oracanthus fragilis NEWBERRY, 1857

Holotype:

Locality: Ohio.

Horizon: Columbus and Delaware Limestone.

Biostratigraphy:

Age: Eifelain Stage, Lower Mid Devonian Epoch, Middle Devonian.

Material:

Referred material:

DENISON, 1978

Locality: New York.

Horizon: Onondaga Limestone.

Biostratigraphy:

Age: Eifelain Stage, Lower Mid Devonian Epoch, Middle Devonian.

Material:

Locality: New York.

Horizon: North Evans limestone, Geneseo shale and Ithaca Shale.

Biostratigraphy:

Age: Eifelain Stage, Lower Mid Devonian Epoch, Middle Devonian.

Material:

Number: Not given:

EASTMAN, 1908

Formation and locality: Onondaga limestone (Ulsterian) near Buffalo an dLe roy, New York, and Columbus and Delaware limestones (“Confierous”) of Ohio. Fragmenatry remains either of this or a very similar form occur in the Hamilton limestone (Erian) of Milwaukee, Wisconsi, and one nearly perfect specimen, now preserved in the Sate Museum at Albany, is interesting for having been derived from the Ithaca beds (recurrent Meso-Devonic fauna in the Portage) near Truxton Corners, Cortland County, New York.

HUSSOKOF, 1908

Locality: Sandusky, Erie County, Ohio.

Horizon: Delaware Limestone.

Biostiratigraphy:

Age: Middle Devonian.

Material:

AMNH 271: 2 plates suturally united, one tapering laterally ot a spine, showing external surface.

Locality: Delaware, Delaware County, Ohio.

Horizon: Delaware Limestone.

Biostiratigraphy:

Age: Middle Devonian.

Material:

AMNH 306: Sub-elliptical plate, somewhat pointed at one end.

AMNH 308: “Trangular plate, probably one side of a flattened spine”.

AMNH 4745: Trangular plate, probably a lateral spine.

HUSSAKOF & BRYANT, 1918

Locality: Eighteen Mile Creek, near North Evans, Erie County, New York.

Horizon: North Evans Limestone.

Biostratigraphy:

Age: Frasnian Stage, Lower Late Devonian Epoch, Late Devonian.

Material:

Museum of the Buffalo Society of New York, E. 1856: Fragmentary plate in matric.

E. 2014: Fragmentary plate in matix.

Note: DENISON, 1979…”The following species described by NEWBERRY (1857C) as Oracanthus are the possible ptyctodont placoderm Eczematolepis fragilis:

O. fragilis, and probably O. multiseratus….”

= Oracanthus granulatus NEWBERRY, 1857

= Oracanthus abbreviatus NEWBERRY, 1857

= Acantholepis pustulosus NEWBERRY, 1875

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Species: telleri (EASTMAN, 1898)
Etymology:
= Phylctaenacanthus telleri EASTMAN, 1898

Holotype:

Locality: Milwaukee, Milwaukee County, Wisconsin.

Horizon: Milwaukee Formation.

Biostratigraphy:

Age: Givetian Stage, Upper Mid Devonian Epoch, Middle Devonian.

Material:

Referred material:

HUSSAKOF & BYRANT, 1918

Locality: Milwaukee, Milwaukee County, Wisconsin.

Horizon: Hamilton Formation.

Biostratigraphy:

Age: Givetian Stage, Upper Mid Devonian Epoch, Middle Devonian.

Material:

Museum of the Buffalo Society of Natural Science, E. 1878: Plate in matrix.