The "Oliva oliva complex" appears as a limited, dense cloud in the attribute hyperspace of the genus Oliva. Shells of this cluster display a wide variety of shapes, sizes and colour patterns and appear at first sight to be all linked by intergrades. Evidence based upon over 8500 measurements effected on 387 specimens indicates on the contrary that our sample of the "Oliva oliva complex" consists of three sibling species and two subspecies.
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