A re-examination of the taxonomic status of Prostoma jenningsi-a Freshwater Nemertean

摘要

Prostoma jenningsi was first recorded at the Clay 'Ole pond in Lancashire, UK, in 1969 and was distinguished histologically from other Prostoma by the presence of 11 proboscidial nerves (with all other Prostoma species thought to have 9-10). P. jenningsi was considered to be the only species endemic to Lancashire and listed in the British Red Data Book as 'Insufficiently Known' as well as a 'Species of Principal Importance' under the UK Natural Environment and Rural Communities Act (2006).