A higher-level classification of Nemertea has been updated based on insights from recent phylogenetic studies. According to this classification, the phylum includes two superclasses (Pronemertea and Neonemertea), three classes (Palaeonemertea, Pilidiopho-ra,

Abstract— A cladistic analysis based on 50 morphological characters was performed for 49 of the 98 species currently assigned to the subclass Palaeonemertea (phylum Nemertea), and six additional undescribed species. Thirty-five species were excluded from

Attention is called for Lineus longissimus, the longest animal in the world, and especially for its occurrence in The Netherlands. A ribbon worm species new for the Dutch fauna is recorded: Emplectonema cf. echinoderma (Marion, 1873). Lineus longissimus