South African marine biogeography has received a great deal of attention in the past.
However, offshore biogeographic breaks are based on abiotic variables or specialist opinion
rather than data-driven approaches. Here we investigate biogeographic breaks based on
the distribution of offshore marine benthic molluscs collected during the Natal Museum
Dredging Programme (1981–1997) along the coast of South Africa, between the South East
Atlantic and South West Indian Oceans. Spatially constrained (depth, latitude and longitude) …