Published online by Cambridge University Press: 11 May 2009
A new species of free-living marine nematode, Terschellingia gourbaultae sp. nov., from the Tamar estuary, south-west England, is described and illustrated. This species has also been recorded from Brittany, France. T. daviger, sensu Gerlach (1963) nec Wieser (1956) is a junior homonym and is re-named T. maldivensis sp. nov. Five Terschellingia species including the new species are distinguished by their lack of a distinctly offset, rounded oesophageal bulb; a table and figures are given to aid identification of these species.