A compact little scarab, Saprosites cascus is known principally from its strongly sculptured hindbody. The underside carries coarse punctures and deeply marked basal bands across the abdominal segments, while the elytra bear punctured longitudinal rows. These features place the animal among the small saprositic scarabs rather than the larger, more familiar dung beetles and chafers.

Living Saprosites are usually found in rotting wood, beneath bark or in litter. That makes a concealed deadwood or litter habitat a reasonable interpretation for the London Clay species, but its actual food is not preserved and the immature stages of the genus are themselves poorly known. The four type specimens are small pyritised body fragments, so the ecology must remain more cautious than the morphology.