Graptolites are uncommon in the Lower Visby Formation. Specimens derived from conodont residues are predominantly members of the long ranging genus Retiolites, with single specimens recorded of Paraplectograptus and Monograptus priodon. Only one graptolite, a specimen of Cyrtograptus bohemicus, has been recovered from the Upper Visby Formation. This is the only biostratigraphically important species in the collection: it has a range of murchisoni Biozone to lower riccartonensis Biozone.
|Number of pages||2|
|Publication status||Published - 2006|