First data of Iberian Nematomorpha, with redescription of <i>Gordius aquaticus</i> Linnaeus, <i>G. plicatulus</i> Heinze, <i>Gordionus wolterstorffii</i> (Camerano) and <i>Paragordius tricuspidatus</i> (Dufour)

Abstract

Four species of Nematomorpha are recorded from NE Spain, representing the first reliable data on the group in the Iberian peninsula. <i>Gordius aquaticits</i> Linnaeus, 1758, <i>G. plicatulus</i> Heinze, 1937, <i>Gordionus wolterstorffii</i> (Camerano, 1888) and <i>Paragordius tricuspidatus</i> (Dufour, 1828) are redescribed based on scanning electron microscope observations. Notes on intraspecific morphological variation and ecology of the species are given.