Plectanocotyle is a genus of monogeneans in the family Plectanocotylidae. It includes five species of parasites on the gills of fish.
According to a study funded by The Swedish Taxonomy Initiative, there are four valid species in this genus:
Plectanocotyle elliptica <small>Diesing, 1850</small>: described probably based on a mutilated specimen, and most importantly, it was suggested that either the host fish had been misidentified or the specimen had been mislabeled as to origin (Price, 1961). It is considered currently a species inquirenda.
Plectanocotyle caudata <small>Lebour, 1908</small>: considered currently synonym of P. gurnardi.
Plectanocotyle lorenzii <small>Monticelli, 1899</small>: considered currently a species inquirenda.