†Calyptraea crassa 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 diegoana, Calyptraea dunni, Calyptraea kilburni, Calyptraea pileus, Calyptraea placuna, Calyptraea ramsisi, Calyptraea rugosa, Calyptraea sorachiensis, Calyptraea subtabulata, Calyptraea undulata
Ecology: facultatively mobile epifaunal suspension feeder