Late triassic naticid drillholes: carnivorous gastropods gain a major adaptation but fail to radiate.

@article{Frsich1984LateTN,
  title={Late triassic naticid drillholes: carnivorous gastropods gain a major adaptation but fail to radiate.},
  author={F T F{\"u}rsich and David Jablonski},
  journal={Science},
  year={1984},
  volume={224 4644},
  pages={78-80}
}
Infaunal and reclining bivalves of the Late Triassic Cassian Formation of northern Italy contain drillholes that closely resemble those produced by modern naticid gastropods. The oldest drillholes previously reported are from the late Early Cretaceous; this suggests that the drilling adaptation was lost soon after its appearance in the Late Triassic and originated independently in another naticid clade 120 million years later. The perceived selective value of such an adaptation may thus not… CONTINUE READING