Aporrhais clarendonensis was a small pelican’s-foot snail that lived on and partly within the soft London Clay seabed. Its adult shell developed an expanded outer lip that helped support the animal on muddy sediment and gave the shell the distinctive shape for which this group is known.

Its feeding biology is reconstructed from the London Clay fauna and living relatives. Aporrhaids use ciliary currents and the proboscis to collect fine organic material from the seabed, so A. clarendonensis was probably a detritus feeder rather than an active predator. It would have helped recycle organic material settling onto the sea floor.