Where: Bucks County, Pennsylvania (40.3° N, 75.1° W: paleocoordinates 14.9° N, 20.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Stockton Formation (Chatham Group), Norian (228.0 - 208.5 Ma)

• Originally described as from the "Norristown shale"; lower Stockton Formation according to Olsen (1988: Paleoecology and Paleoenvironments of the Continental Early Mesozoic Newark Supergroup of Eastern North America: In ed. W. Manspeizer, Triassic-Jurassic Rifting and the opening of the Atlantic Ocean, Elsevier, Amsterdam, p. 185-230.)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; red shale

Size class: macrofossils

Collected by G. V. Ingen, W. J. Sinclair; reposited in the YPM

Primary reference: W. J. Sinclair. 1917. A new labyrinthodont from the Triassic of Pennsylvania. American Journal of Science 256:319-321 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 107422: authorized by Richard Butler, entered by Richard Butler on 07.04.2011

Creative Commons license: CC BY (attribution)