Atholville Beds (Devonian of Canada)

Where: New Brunswick, Canada (48.0° N, 66.7° W: paleocoordinates 37.5° S, 13.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Campbellton Formation, Emsian (407.6 - 393.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; lithified, coarse-grained mudstone

• "might represent a fossilized mudflow or lahar"
• "steeply inclined basal coarse mudstone breccia overlain by a succession of interbedded sandstones and mustdones... dark grey fossiliferous mudstone-breccia containing rhyolite fragments and blocks of sandstone or finer mudstone rich in ostracodes and gastropods, with eurypterids and plants are mainly unbedded"

•certainly highly lithified based on figures of specimens

Size class: mesofossils

Reposited in the BMNH, CM, MCZ

• other specimens are in the National Museum of Scotland

Primary reference: J. Maisey, R. Miller, and S. Turner. 2009. The braincase of the chondrichthyan Doliodus from the Lower Devonian Campbellton formation of New Brunswick, Canada. Acta Zoologica 90:109-122 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 197260: authorized by Pete Wagner, entered by Pete Wagner on 27.10.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Xenacanthiformes - Diplodoselachidae
Diplodus problematicus Woodward 1892 elasmobranch