Productida, gen. indet.

A productid brachiopod. Productids carried hollow spines rooted in the shell, used to anchor the animal in soft sediment or to prop it clear of the sea floor rather than for defence. The spines break off easily and are usually preserved only as circular scars.

Productids were the dominant brachiopods of the Permian and the most diverse order the phylum ever produced. Almost none survived the end-Permian extinction.

In the Permian of the Sydney Basin the spiny brachiopods are typically Strophalosia, Echinalosia or Terrakea, but distinguishing them needs the shell interior.