Authenticated (13/07/2006) by Dr. Dai G. Herbert, Chief Curator: Mollusca, Natal Museum, and member of the IUCN/SSC Southern African Invertebrate, and Mollusc Specialist Groups.
http://www.nmsa.org.za/
Endemic: A species or taxonomic group that is only found in one particular country or geographic area.
Scarp: An escarpment, cliff, or steep slope of some extent along the margin of a plateau or ridge.
Stochastic: Random, uncertain or unpredictable.
Whorl: In molluscs,the spiral coils of the shell of a snail.