ammonites
Polidevcia thomasi Dickins 1956 (pointed nut clam)

Bivalvia - Protobranchia - Nuculanidae

Alternative combination: Nuculana thomasi

Full reference: J. M. Dickins. 1956. Permian pelecypods from the Carnarvon Basin, Western Australia. Bureau of Mineral Resources, Geology and Geophysics Bulletin 29:1-42

Belongs to Polidevcia according to J. M. Dickins 1963

Sister taxa: Polidevcia abrupta, Polidevcia aequilata, Polidevcia antequadrata, Polidevcia arctura, Polidevcia bellistriata, Polidevcia bicarinata, Polidevcia browni, Polidevcia cryptica, Polidevcia flexuosa, Polidevcia jamesi, Polidevcia kasanensis, Polidevcia kolyvanica, Polidevcia lunulata, Polidevcia lyonsensis, Polidevcia magna, Polidevcia nodulosa, Polidevcia obesa, Polidevcia ovata, Polidevcia stevensiana, Polidevcia tulcumbensis, Polidevcia undosa, Polidevcia vorgaschorica, Polidevcia zabaikalica

Type specimen: CPC 737 (F17077), a valve (Right valve). Its type locality is BMR F17077, Muderong Bore, Middalya Station, which is in a Roadian coastal siliciclastic in the Coolkilya Formation of Australia.

Ecology: facultatively mobile infaunal deposit feeder-suspension feeder

Average measurements (in mm): valve 10.1 x 1.5