Calcirhynchia is one of the most common brachiopods found in the Lower Jurassic rocks around Lyme Regis. In each specimen, the space between the shells has been filled with calcite crystals, and they remain uncrushed for this reason.
The finder of these specimens was W.D Lang, who was a keeper of geology at the British Museum (Natural History). He made valuable contributions to both geology and palaeontology, publishing the most comprehensive description of the Lower Liassic strata in the Lyme Regis area, still widely used today.
Find out more on the brachiopods page.