The bivalve Hiatella has been present for the last 150 Ma and is consistently linked to cool-temperate and polar regions. Its origin can be traced back to at least the Jurassic, with earliest known records being temperate forms that occurred on the northern

The bivalve Hiatella has been present for the last 150 Ma and is consistently linked to cool-temperate and polar regions. Its origin can be traced back to at least the Jurassic, with earliest known records being temperate forms that occurred on the northern

Hiatella is among the most poorly understood bivalve genera. Most of the species remain known only from shell morphology, which has proved to be extremely variable in the group. Few studies have addressed their anatomy and biology, and no studies have