Puellina directa is an encrusting bryozoan. Colonies form irregular sheets, composed of a single layer of autozooids. Autozooids are distinct. They are broadly oval to hexagonal, convex and separated by deep grooves. They range in size from 0.17-0.32 by 0.11-0.16 mm. Five spines are present in non-reproductive zooids, and two in reproductive zooids (with an ovicell).
The species is able to colonise hard substrates, from 38-99 metres. It is known from very few specimens collected of the coasts of Normandy and Brittany
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