Abstract<br />Th e aquatic Coleoptera (Gyrinidae, Haliplidae, Dytiscidae, Hydrophilidae, Elmidae, Dryopidae, Heteroceridae)<br />of Prince Edward Island, Canada is surveyed. Seventy-two species are now known to occur<br />on Prince Edward Island, 26 of which are added to the island’s faunal list. Th ree species, Gyrinus aquiris<br />LeConte, Oulimnius latiusculus (LeConte), and Helichus striatus LeConte, are removed since there are no<br />voucher specimens or published records to substantiate their presence. Th e name Dineutus horni is designated<br />as an incorrect subsequent spelling of Dineutus hornii Roberts, 1895. Th e composition of the fauna<br />is briefl y discussed, both from regional and zoogeographic perspectives. Th ere is only one introduced<br />species, Helophorus grandis Illiger. Only one third of the aquatic fauna recorded on the neighbouring<br />mainland has been found on Prince Edward Island, perhaps refl ecting an island-associated diminution,<br />the paucity of collecting, an area eff ect, or a combination of all these factors. Th e island faunas of Prince<br />Edward Island, Cape Breton Island, and insular Newfoundland are compared. Prince Edward Island’s<br />is 36% smaller than the others, in contrast with the island’s carabid fauna which is almost identical in<br />magnitude with that of Cape Breton. Th is might refl ect dispersal obstacles, the relative paucity of aquatic<br />habitats on the island, or an insuffi cient collecting eff ort. Further research would be desirable, both to better<br />discern the composition of the province’s fauna, as well as to monitor the health of aquatic ecosystems<br />in relation to anthropogenic activities.
Majka, C. (2008). The aquatic Coleoptera of Prince Edward Island, Canada: new records and faunal composition. ZooKeys, 2, 239–260. https://doi.org/10.3897/zookeys.2.25