Figure 1.  Evolution of Conoidea classification. Cone snail,
turrid, and terebrid shells that make up the Conoidean
superfamily are depicted. A. Conoidea classification based on
shell and radula characters (e.g. [8,57]). B. Conoidea
classification based mainly on anatomical characters ([1]). ST =
Strictispiridae; DR = Drilliidae; PS = Pseudomelatomidae. C.
Conoidea classification with molecular characters. Two main
clades are defined, but a formal classification has not yet been
proposed.  Puillandre and Holford BMC Chemical Biology 2010 10:7
  doi:10.1186/1472-6769-10-7 Download authors' original image