Species: nitida (KIAER, 1932) STRAND, 1934
Etymology:
= Homalaspis nitida KIAER, 1932

Holotype: Oslo Paleontological Museum, PMOD 156

Locality: Locality no. 9A, westernmost part of the cliff at the northwestern boundary of the western plateau, close to Raudfjordbreen, Ben Nevis, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material: Dorsal shield.

Paratypes:

Locality: Westernmost part of the cliff at the northwestern boundary of the western plateau, close to Raudfjordbreen, Ben Nevis, Red Bay, Spitsbergen, Svalbard Island, Norway.

Horizon: Horizon L (= Ctenaspis horizon), Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

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

Material:

PMO D 148: Venral disc with part of a lateral plate and a scale.

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 175: internal mould of dorsal shield.

Referred material:

BLIECK & HEINTZ, 1972

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 183, 1929:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 3034-3035:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

Horizon: Horizon E-F, Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

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

Material:

PMO D 1923:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 245:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 1930:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO D 170-171:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

Horizon: Ctenaspis horizon = horizon J-L, Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

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

Material:

PMO D 1473:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

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

Biostratigraphy:

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

Material:

PMO 1500:

 

Locality: Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

Horizon: SE side of Sigurdfjhellet, Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

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

Material:

PMO D 176:

 

Locality: Northern Ridge, Ben Nevis, cliff of wesern plateau, Red Bay, Spitsbergen, Svalbard Island, Norway.

Horizon: Vogit horizon. A, Red Bay Series, Ben Nevis Formation, Red Bay Group.

Biostratigraphy:

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

Material:

MNHN SVD 504/I, 566, 597:

 

Locality: Red Bay, Fraenkelryggen, Spitsbergen, Svalbard Island, Norway.

Horizon: Anglaspis horizon, Fraenkelryggen Group, Red Bay Series.

Biostratigraphy:

Age: Early Devonian.

Material:

?SVD 611:

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Species: borealis DENISON, 1963
Etymology:

Holotype: Princeton University, PU 17101

Locality: Beaver River, 60°27’N lat., 125°46’W long, Southeastern Yukon Province, Canada.

Horizon:

Biostratigraphy:

Age: Downtonian (?), Ludlovian Epoch, Late Silurian.

Material: Dorsal Shield.

FMNH PF 3706: Cast of type.

Referred specimen

= Homalaspidella cf. H. borealis DINELEY & LOEFFLER, 1976

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

Horizon: With the Delorme Formation.

Biostratigraphy:

Age: Late Silurian.

Material:

NMC 19765: Incomplete dorsal shield associated with several scales.

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

= Homalaspidella cf. H. borealis LOEFFLER & JONES, 1976

Locality: On the east side of the bay at Port Leopold, Somerset Island, North-west Territories Province, Canada.

Horizon: Approximately 220 m above the base of the Leopold Formaton.

Biostratigraphy:

Age: Late Silurian to Early Devonian.

Material:

NMC 21596: An incomplete dorsal sheild.

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