Species: ellipticus BRYANT, 1934
Etymology:

Holotype: 13752

Locality: Beartooth Butte, Park County, Wyoming.

Horizon:

Biostratigraphy:

Age: Late Devonian.

Material: Complete dorsal shield.

Referred material:

13738: Fragment of a ventral shield.

BRYANT, 1936

13844: Natural cast of inner surface of dorsal shiedl with patches fo boney tissue adhering.

13844A: Counterpart to 13844.

13845: Natrual cast of front half of dorsal sheild.

13850: Front half of ventral sheild.
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Species: flabelliformis BRYANT, 1936
Etymology:

Holotype :13888

Locality: Beartooth Butte, Park County, Wyoming.

Horizon:

Biostratigraphy:

Age: Late Devonian.

Material: A nearly complete ventral sheild.
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