Selective epizoan encrustation of some Silurian Brachiopods from Gotland

In a large collection of brachiopods from the Ludlow of Gotland, epizoan attachment is related to surface shell ornament and rib angularity. 'Camarotoechia' nucula has lateral inhalant canals which are indicated by Cornulites encrusting that part of the host shell. The distribution of Spirorbis suggests that 'Camarotoechia' nucula and Homoeospira baylei lived with the pedicle valve up, whilst Ptychopleurella bouchardi lived with the anterior commissure up.