TF0151 Bivalve (manmade external mould)

Phylum: Mollusca
Class: Bivalvia

Ribs

Manmade external mould

Although this particular specimen is a manmade mould, internal and external moulds are common ways in which bivalves are preserved.

Because they commonly disarticulate after death, external and internal moulds of one valve are also common, with the impression of the shell outlasting the shell itself, which is often dissolved.