ammonites
Phestia pandoraeformis Stevens 1858 (pointed nut clam)

Bivalvia - Protobranchia - Nuculanidae

Alternative combinations: Leda pandoraeformis, Polidevcia pandoraeformis

Full reference: R. P. Stevens. 1858. Description of new Carboniferous fossils from the Appalachia, Illinois and Michigan coal fields. American Journal of Science 25:258-265

Belongs to Phestia according to R. D. Hoare 2007

Sister taxa: Phestia basedowi, Phestia corrugata, Phestia darwini, Phestia elongata, Phestia hunanensis, Phestia inflatiformis, Phestia lusabaensis, Phestia nova, Phestia obtusa, Phestia perumbonata, Phestia rugodorsata, Phestia sinuata, Phestia speluncaria, Phestia subacuta, Phestia thompsoni, Phestia wortheni, Phestia zhejiangensis

Ecology: facultatively mobile infaunal deposit feeder-suspension feeder