DINELEY & FOEFFLER, 1976

Locality: GSC 58497, 62?46’N, 126?30’W, northernmost Thundercloud Range, Northwest Territories, Canada.

Horizon: 55m above the base of the Delorme Formation.

Biostratigraphy:

Age: Late Silurian or Early Devonian.

Material:

Type 1

NMC 21425: A dorsal shield incomplete posteriorly.

Note: Shallow water, probably of low salinity; low-energy levels, but perhaps periodic flooding or tidal movement of water.

 

Locality: GSC 69017, 63?25’N, 128?00’W, west of Natla River, Northwest Territories Province, Canada.

Horizon: 38m above the base of the Delorme Formation.

Biostratigraphy:

Age: Late Silurian or Early Devonian.

Material:

Type 2

NMC 19769: Fragment of the anterior end of of a dorsal shield.

Note: Brackish water lagoon.

Locality: GSC 81050, exact co-ordinates uncertain, on a ridge on the south side of June Lake, Northwest Territories Province, Canada.

Horizon: With the Delorme Formation.

Biostratigraphy:

Age: Late Silurian.

Material:

Type 3

NMC 19768: An incomplete dorsal shield.

NMC 19764: A dorsal shield.

Note: High-energy, shallow-water, marine.

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= Archegonaspis? sp FLOWER & WAYLANDSMITH, 1952

Locality: About 2 miles southeast of Kenwood, Oneida County, New York.

Horizon: Vernon Shale, Salina Group.

Biostratigraphy:

Age: Late Silurian.

Material:

Number: Not given: Fragmentary plate.