Fossil History
The fossil history for Rissoidae is relatively poor, probably due to the hard, shallow-water environments that most members live in(Ponder, 1985). The Rissoids were first known to appear during the Middle Jurassic, with remains found in Europe. The fossil history was relatively poor during the Cretaceous but showed high diversities during the Tertiary. Many of the extant taxa have fossil records dating back to the Eocene (Ponder, 1985). |