Adeonellopsis wetherelli was a colonial bryozoan: not a single large animal, but a colony of many tiny zooids living in adjoining calcified chambers. Each feeding zooid would have extended a crown of ciliated tentacles, the lophophore, to filter microscopic food particles from seawater.

Adeonellopsis-type colonies are erect and calcified, creating branching or sheet-like frameworks above a firm attachment point. In the London Clay, bryozoans are rare and are often associated with woody debris, which likely provided the hard substrate needed by otherwise sessile colonies in a muddy environment.