Environmental and Evolutionary Stability in Bivalve Mollusks

Science  29 Nov 1974:
Vol. 186, Issue 4166, pp. 828-830
DOI: 10.1126/science.186.4166.828


There is no relationship between environmental stability [as indicated by infaunal (stable) versus epifaunal (unstable) habits] and the generic duration of extinct marine bivalve mollusks when the effects of cosmopolitanism (which is associated with long generic durations) and other paleontological "noise" are excluded. This is contrary to the "depauperate gene pool" hypothesis of extinctions.