Abstract
There is only the one poorly preserved and imperfect specimen in the Woodwardian Museum on which Salter founded this species. It comes from the Wenlock Limestone of Dudley and belongs to the Fletcher Collection. Salter says of it (a 827): “Strongly costated and marked with lines of growth which decussate the ribs. Twice the size of the common Ludlow species.” The material is so poor that the specific description must necessarily be incomplete.
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