ammonites
Calyptraea placuna Tate 1893 (slipper shell)

Gastropoda - Calyptraeoidea - Calyptraeidae

Full reference: R. Tate. 1893. The gastropods of the Older Tertiary of Australia (Part 4). Transactions and Proceedings of the Royal Society of South Australia 17:316-345

Belongs to Calyptraea according to R. Tate 1893

Sister taxa: Calyptraea (Bicatillus), Calyptraea (Calyptraea), Calyptraea (Trochatella), Calyptraea centralis, Calyptraea chinensis, Calyptraea corrugata, Calyptraea crassa, Calyptraea diegoana, Calyptraea dunni, Calyptraea kilburni, Calyptraea pileus, Calyptraea ramsisi, Calyptraea rugosa, Calyptraea sorachiensis, Calyptraea subtabulata, Calyptraea undulata

Ecology: facultatively mobile epifaunal suspension feeder