Species: dentata KIAER, 1930
Etymology:

Holotype:

Locality: Ben Nevis, Spitsbergen, Svalbard Island, Norway.

Horizon: Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

Horizon: Lower Dittonian, Lower Pragian Stage, Early Devonian.

Material:

Referred material:

= Ctenaspis n. sp. aff. dentatus THORSTEINSSON, 1958

Locality: Read Bay, Cornwallis Island, North-west Territories Province, Canada.

Horizon: Snowblind Bay Formation.

Biostratigraphy:

Age: Lochkovian-Pragian Stage, Lower-Middle Devonian Epoch, Early Devonian.

Material:

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Species: kiaeri ZYCH, 1931
Etymology:

Holotype:

Locality:

Horizon:

Biostratigraphy:

Age:

Material:
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Species: obruchevi DINELEY, 1976
Etymology: In honor of the late Professor D. V. Obruchev, Moscow.

Holotype: NMC 21700

Locality: Locality A, Prince of Wales Island, North-west Territoires, Canada.

Horizon: Upper Member, Peel Sound Formation.

Biostratigraphy:

Age: Gedinnian-?Siegenian, Lochkovian-Pragian Stage, Lower-Middle Devonian Epoch, Early Devonian.

Material: Imperfect dorsal shield and tail.

Referred material:

NMC 21701, 21704-21780:
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Species: russelli DINELEY, 1976
Etymology: In honor of Dr. Loris S. Russell.

Holotype: NMC 21702

Locality: Locality B, Northern part of Prince of Wales Island, North West Territories Province, Canada.

Horizon: Sandstone-Carbonate facies of the Peel Sound Formation.

Biostratigraphy:

Age: Gedinnian-?Siegenian, Lochkovian-Pragian Stage, Lower-Middle Devonian Epoch, Early Devonian.

Material: Dorsal shield.

Referred material:

NMC 21703, 21781, 21855:
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Species: ornata DINELEY, 1976
Etymology: The species is so named because of the ornate surface markings of hte shelds and the presernce of an ornamented dorsal spine.

Holotype: NMC 21856

Locality: Found in loose scree onlower slope of Mt. Matthias, northeastern part of Prince of Wales Island, North West Territories Province, Canada.

Horizon: Sandstone-Carbonate facies of the Peel Sound Formation.

Biostratigraphy:

Age: Gedinnian-?Siegenian, Lochkovian-Pragian Stage, Lower-Middle Devonian Epoch, Early Devonian.

Material: Dorsal shield, incomplete.

Referred material:

NMC 21857-21859: