Abstract
Comparison is made between two diverse faunas of conoidean gastropods in the tropical western Atlantic and eastern Atlantic, which have undergone dramatic adaptive radiation in a relatively short geological period. Hypothetical speciation processes of these groups are discussed, compared and contrasted. A complete iconography of the living species of Jaspidiconus together with a discussion of biogeopraphic regions is made to place these species hypotheses in their environmental and ecological context, together with a discussion of the requirement of total evidence and suggestions for further studies.
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