McArras Brook Rd, Arisaig (Devonian of Canada)

Where: Nova Scotia, Canada (45.7° N, 62.2° W: paleocoordinates 33.6° S, 21.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Knoydart Formation (Arisaig Group), Lochkovian (419.2 - 410.8 Ma)

• STRATIGRAPHIC RELATIONS: From the Knoydart Fm, for which lithostratigraphic relationships are not discussed. AGE: Lower Devonian (lower Dittonian); assigned to Lochkovian on the basis of other nearby localities. STRATIGRAPHIC POSITION: From 100 ft above bed 44 of Fletcher's section (Ami, 1901), thus presumably bed 54; on conversely bed 22 of Leonard's section (Leonard, 1951). Approximately 760 ft above the lowermost exposure of the Knoydart Fm.

• formation-level stratigraphic resolution

Environment/lithology: coastal; calcareous sandstone and calcareous shale

• LITHOLOGY: Sandstone and shale with calcite nodules. LITHIFICATION: Assumed lithified.

Size class: macrofossils

Collection methods: COLLECTOR: Unknown. REPOSITORY: Field Museum, Chicago.

Primary reference: B. G. Gardiner. 1966. Catalogue of Canadian fossil fishes. Life Sciences Contribution of the Royal Ontario Museum 68:1-154 [M. Clapham/P. Vazquez]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 161378: authorized by Austin Hendy, entered by Austin Hendy on 04.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to fishes. NOMENCLATURE: Semi-authoritative publication, with fairly modern nomenclature, and species-resolution identifications.
Petromyzontida
 Cephalaspidiformes - Cephalaspidae
Cephalaspis sp. Agassiz 1835
Cephalaspis novaescotiae n. sp. Denison 1955